CN104892331A - Biodegradable organic polymeric nitrogen fertilizer and preparation method therefor - Google Patents
Biodegradable organic polymeric nitrogen fertilizer and preparation method therefor Download PDFInfo
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Abstract
The invention relates to the field of slow and controlled release of fertilizers, and specifically is a biodegradable organic polymeric nitrogen fertilizer and a preparation method therefor. Compared with existing fertilizer capable of slow and controlled release, the nitrogen fertilizer of the invention has the following advantages: (1) nutrient elements of carbon, hydrogen, oxygen and nitrogen of molecules of the nitrogen fertilizer of the invention are firmly connected to a same polymer chain by chemical bonds, thereby providing the nitrogen fertilizer with excellent properties of slow and controlled release. Total nitrogen release in water and soil shows an obvious rising trend within 1 to 20 days, and nutrient release is relatively slower within 20 to 90 days, thus greatly improving the utilization rate of the nitrogen fertilizer. and (2)After being applied in the soil, the biodegradable organic polymeric nitrogen fertilizer of the invention, under the effect of soil microbes and the water, gradually degrades into small-molecule nutrients for absorption and utilization by plants, so that the amount of nutrient elements of nitrogen fixed in the soil is reduced, and non-absorbable harmful substances are not left in the soil. The Biodegradable organic polymeric nitrogen fertilizer is a novel fertilizer that meets the green environmental protection requirements.
Description
Technical field
The present invention relates to sustained and controlled release chemical fertilizer field, be specially a kind of biodegradable organic polymer nitrogenous fertilizer and preparation method thereof.
Background technology
Nitrogen is a kind of nutritive element in growing process with special significance.Because the nitrogen fertility of world's soil is not high, nitrogen not easily accumulates again in soil, and modern intensiveization agricultural impels the too much loss of the soil organism and nitrogen, and in most cases the units increased in production of unit nitrogen is higher than phosphorus, potassium nutrition.Therefore, since 20th century, the production of nitrogenous fertilizer occupy very important status at home and abroad always.According to investigations, there is the arable land nitrogen stress of more than 80% in China, but the average utilization of China's nitrogenous fertilizer only has about 35% simultaneously.The low waste not only causing nutrient of utilization rate of fertilizer, reduces the economic benefit of agriculture production, and brings serious environmental problem.In recent years, many investigators pointed out, if the excessive nitrogenous fertilizer applied in soil can not act on plant directly or indirectly, will diafiltration in underground water, have a strong impact on environment and human health.Improve plant recovery of nutrient, especially one of nitrogen utilization efficiency possible approach uses slow release fertilizer.
Current slow-release nitrogen fertilizer mainly contains synthetic organic nitrogen fertilizer, coated fertilizer, slow insoluble inorganic fertilizer, take natural organic matter as the various ammoniated fertilizer Four types of matrix, wherein most importantly synthetic organic nitrogen fertilizer and coated fertilizer.Synthetic organic nitrogen fertilizer mainly comprises urea formaldehyde, isobutylidene two urea, crotonylidene two gland, oxamide etc.; Coated fertilizer kind mainly contains sulfur-coated urea, polymer coated fertilizer, paraffin coated fertilizer, ammonium magnesium phosphate coated fertilizer (as slow bicarbonate of ammonia) etc.Although chemical fertilizer can be given by coating means delay controlled release properties, also bring following problem: belong to secondary processing, cause production cost to improve simultaneously; Nutrient content in chemical fertilizer reduces, and containing can not be absorbed by crops component; The coating broken remains in soil and can pollute.
Summary of the invention
The present invention aims to provide and a kind ofly progressively degrades under water and microbial process in soil and be hydrolyzed and biodegradable organic polymer nitrogenous fertilizer discharging the nitrogen element that can be absorbed and used by plants and preparation method thereof.
The present invention is achieved by the following technical solutions: biodegradable organic polymer nitrogenous fertilizer, and its structural formula is:
N=2 ~ 200 in formula.
The content of the nutrient nitrogen contained by above-mentioned biodegradable organic polymer nitrogenous fertilizer counts 27.60wt% ~ 33.13wt% with mass percentage.
The synthetic route that invention further provides described biodegradable organic polymer nitrogenous fertilizer is as follows:
Further, in order to be explained in detail the present invention, provide the preparation method of described biodegradable organic polymer nitrogenous fertilizer, its preparation method is: add Urethylane, urea and catalyzer salt of wormwood in reaction vessel, at 160 DEG C, react 6h, then linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dry, obtain biodegradable organic polymer nitrogenous fertilizer.
In addition, the mol ratio of reactant Urethylane and catalyzer salt of wormwood described in this preparation method is 1.0:0.06.By the research carried out the first step reaction process, under this mol ratio, the poly-carbonyl urea of synthesis, namely the transformation efficiency of the first step reaction product is higher, is the processing condition of the best.
The effect of linking agent triisocyanate is the amido generation crosslinking reaction of C=N and the poly-carbonyl urea had by himself, form tridimensional network, thus reduce the higher cold water solubility of poly-carbonyl urea, therefore, add the linking agent triisocyanate of different molar weight, the biodegradable organic polymer nitrogenous fertilizer of different cold water solubility and hot water dissolving's degree can be obtained.Said synthesis route is linking agent triisocyanate and the poly-carbonyl urea operational path by the molar ratio reaction of 1:3, triisocyanate is identical with above-mentioned operational path by the mechanism of other molar ratio reaction with poly-carbonyl urea, is all the crosslinking reaction that the C=N of triisocyanate and the amido of poly-carbonyl urea occur.
Biodegradable organic polymer nitrogenous fertilizer of the present invention, compared with existing slow Controlled Release Nitrogen Fertilizer, has following beneficial effect:
(1) carbon in nitrogenous fertilizer molecule of the present invention, hydrogen, oxygen, nitrogen nutrition element are connected on same macromolecular chain by chemical bond securely, the slow controlled release properties of nitrogenous fertilizer excellence can be given, full nitrogen released rate in water sweetening of the soil 1 to 20 day is obvious ascendant trend, within 20 to 90 days, nutrients release is comparatively slow, can increase substantially the utilization ratio of nitrogenous fertilizer;
(2) after biodegradable organic polymer nitrogenous fertilizer of the present invention is manured into soil, under the effect of soil microorganisms and water, be progressively degraded to small molecules nutritive substance be absorbed and used by plants, the fixed amount of soil to nutrient nitrogen can be reduced, also can not leave unabsorbable objectionable impurities to soil, be a kind of new-type fertilizer meeting environment protection requirement.
Accompanying drawing explanation
Fig. 1 is the relation between the cold water solubility of biodegradable organic polymer nitrogenous fertilizer and linking agent triisocyanate add-on.As seen from the figure: along with the increase of linking agent add-on, the cold water solubility of biodegradable organic polymer nitrogenous fertilizer diminishes, this is because along with the increase of linking agent add-on, the molecule be cross-linked in biodegradable organic polymer nitrogenous fertilizer is on the increase, and therefore cold water solubility diminishes.When linking agent add-on is 3g, cold water solubility is 66%; When linking agent add-on is 15g, cold water solubility is 21%, shows that the cold water solubility of the add-on of linking agent to biodegradable organic polymer nitrogenous fertilizer has a great impact.
Fig. 2 is the infrared spectrogram of the biodegradable organic polymer nitrogenous fertilizer that embodiment 1 obtains.3427cm in figure
-1the absorption peak at place is the stretching vibration absorption peak of the secondary amino group N-H key in-CO-NH-CO-, 2922cm
-1and 2851cm
-1the absorption peak at place is-CH
2the stretching vibration absorption peak of-middle c h bond and flexural vibration absorption peak, 1630cm
-1the absorption peak at place is the stretching vibration absorption peak of C=O double bond in-NH-CO-NH-, 1415cm
-1and 1383cm
-1the absorption peak at place is the flexural vibration absorption peak of N-H key in-CO-NH-CO-.It can thus be appreciated that, there is in this material poly-carbonyl urea-[CO-NH]
n-basic structure, have the appearance of methylene radical simultaneously, show that linking agent and poly-carbonyl urea there occurs reaction.
Fig. 3 is the nucleus magnetic resonance of the biodegradable organic polymer nitrogenous fertilizer that embodiment 1 obtains
13c-NMR spectrogram.Between 160.86ppm place, there is displacement, show the carbon atom in biodegradable organic polymer nitrogenous fertilizer with-NH-CO-NH-; There is displacement at 31.41ppm place, show there is mesomethylene carbon; And displacement is had at 34.54ppm place, indicate linking agent and poly-carbonyl urea there occurs reaction, the carbon atom absorption peak that result in methylene radical there occurs change in displacement.Known accordingly, in this material, there is carbonyl carbon, have the appearance of methylene radical simultaneously, can learn that linking agent and poly-carbonyl urea there occurs reaction.By FTIR,
13c-NMR comprehensively analyzes known: linking agent triisocyanate and poly-carbonyl urea react and generate described biodegradable organic polymer nitrogenous fertilizer.
Fig. 4 is full nitrogen release profiles in the water of the biodegradable organic polymer nitrogenous fertilizer that embodiment 2,3,4 and 5 obtains.As seen from the figure, along with the increase of cultivated days, the full nitrogen released rate of biodegradable organic polymer nitrogenous fertilizer in water of 4 kinds of different cold water solubilities presents ascendant trend, early stage, release was very fast, later stage release is comparatively slow, cold water solubility be 20 the total nitrogen content that discharges of biodegradable organic polymer nitrogenous fertilizer (S20) be respectively the total nitrogen content of the release of 30 (S30), 40 (S40) and 50 (S50) lower than cold water solubility.1 ~ 20 day, the full nitrogen released rate of the biodegradable organic polymer nitrogenous fertilizer of 4 kinds of different cold water solubilities all presents obvious ascendant trend, cold water solubility be 20 the total nitrogen content that discharged the 20th day time of biodegradable organic polymer nitrogenous fertilizer reach 492.80mg, account for 34.86% of its initial nitrogen content, cold water solubility is 30, the biodegradable organic polymer nitrogenous fertilizer of 40 and 50 compared with cold water solubility be 20 respectively release 49.62% more, the nitrogen of 62.12% and 100.76%, account for respectively they separately initial N contents 53.19%, 54.65% and 68.63%.20th ~ 90 days, the nutrients release of the biodegradable organic polymer nitrogenous fertilizer of 4 kinds of different cold water solubilities is all comparatively slow, wherein cold water solubility be 20 biodegradable organic polymer nitrogenous fertilizer the 90th day time, release the full nitrogen of 555.33mg, account for 39.28% of its initial nitrogen content, cold water solubility be 30,40 and 50 biodegradable organic polymer nitrogenous fertilizer compared with cold water solubility be 20 release more 46.05%, 53.45% and 88.74% nitrogen, account for respectively they separately initial N contents 58.51%, 58.29%, 72.70%.
Kinetic equation description is carried out to the nutrient release curve of biodegradable organic polymer nitrogenous fertilizer in water, the results are shown in Table 1.
The equation model of Nitrogen Accumulation release rate in table 1 static water releasing test
As shown in Table 1, Elovich equation to the degree of fitting of the Nitrogen Accumulation release rate of biodegradable organic polymer nitrogenous fertilizer in hydrostatic up to more than 0.96, therefore, the Nitrogen Accumulation release rate of biodegradable organic polymer nitrogenous fertilizer of the present invention in hydrostatic can be Y=a+blnX with Elovich equation model; Wherein cold water solubility is the Nitrogen Accumulation release rate of biodegradable organic polymer nitrogenous fertilizer in hydrostatic of 20 can be Y=15.85+5.77lnX with Elovich equation model, cold water solubility is the fitted to Y=31.32+6.76lnX of 30, cold water solubility is the fitted to Y=34.39+6.07lnX of 40, and cold water solubility is the fitted to Y=45.13+7.05lnX of 50; In formula, X be time of releasing (my god), Y is nitrogen nutrient preparation.
Fig. 5 is the full nitrogen release profiles of biodegradable organic polymer nitrogenous fertilizer in soil that embodiment 2,3,4 and 5 obtains.As seen from the figure, along with the increase of cultivated days, the full nitrogen released rate of biodegradable organic polymer nitrogenous fertilizer in soil of 4 kinds of different cold water solubilities all presents ascendant trend, early stage, release was very fast, later stage release is comparatively slow, the total nitrogen content of cold water solubility to be the total nitrogen content of the biodegradable organic polymer nitrogenous fertilizer release of 20 lower than cold water solubility the be release of 30,40 and 50.1st ~ 20 days, the full nitrogen released rate of the biodegradable organic polymer nitrogenous fertilizer of 4 kinds of different cold water solubilities presents ascendant trend faster, cold water solubility be 20 biodegradable organic polymer nitrogenous fertilizer the 20th day time, release the nitrogen of 53.20mg, account for 45.46% of its initial nitrogen content, cold water solubility be 30,40 and 50 biodegradable organic polymer nitrogenous fertilizer compared with cold water solubility be 20 release more 3.51,10.53%, 49.12% nitrogen, account for respectively they separately initial N contents 47.05%, 50.24% and 67.79%; 20th ~ 90 days, the nutrients release of the biodegradable organic polymer nitrogenous fertilizer of 4 kinds of different cold water solubilities is all comparatively slow, cold water solubility be 20 biodegradable organic polymer nitrogenous fertilizer released the nitrogen of 55.07mg at the 90th day, account for 47.05% of its initial nitrogen content, cold water solubility be 30,40 and 50 biodegradable organic polymer nitrogenous fertilizer compared with cold water solubility be 20 respectively more release 10.17%, 18.64%, 52.54% nitrogen, account for respectively they separately initial N contents 51.84%, 55.82% and 71.77%.Kinetic equation description is carried out to the nutrient release curve of biodegradable organic polymer nitrogenous fertilizer in soil, the results are shown in Table 2.
The equation model of Nitrogen Accumulation release rate in the test of table 2 soil incubation
As shown in Table 2, Elovich equation to the degree of fitting of the Nitrogen Accumulation release rate of biodegradable organic polymer nitrogenous fertilizer in soil up to more than 0.91, therefore, the Nitrogen Accumulation release rate of biodegradable organic polymer nitrogenous fertilizer of the present invention in soil can be Y=a+blnX with Elovich equation model; Wherein, cold water solubility be 20 the Nitrogen Accumulation release rate of biodegradable organic polymer nitrogenous fertilizer in soil can be Y=16.03+9.11lnX with Elovich equation model, cold water solubility is the fitted to Y=20.44+7.83lnX of 30, cold water solubility is the fitted to Y=29.99+6.28lnX of 40, and cold water solubility is the fitted to Y=38.77+8.62lnX of 50; In formula, X be time of releasing (my god), Y is nitrogen nutrient preparation.
Embodiment
The evaluation index adopted in the present invention and testing method as follows:
Cold water solubility is tested: take the biodegradable organic polymer nitrogenous fertilizer that 5g (being accurate to 0.0001) is dry, join in 100mL distilled water, shake up, and the climatic chamber of 25 DEG C is put in sealing.Leave standstill after 24 hours and take out, with G3 sand core funnel suction filtration, then dry in 80 DEG C of baking ovens, namely the per-cent that calculating dissolving part accounts for fertilizer total amount obtain cold water solubility.Cold water solubility can represent the content of available nutrient in biodegradable organic polymer nitrogenous fertilizer.
Hot water dissolving's degree is tested: take the biodegradable organic polymer nitrogenous fertilizer that 5g (being accurate to 0.0001) is dry, join in the single port flask of 250mL, add 100mL distilled water, reflux 24 hours, be cooled to room temperature, with G3 sand core funnel suction filtration, filter cake is placed in 80 DEG C of baking ovens and dries, namely the per-cent that calculating dissolving part accounts for fertilizer total amount obtain hot water dissolving's degree.Hot water dissolving's degree can represent the content of long-acting slow-release nutrient in biodegradable organic polymer nitrogenous fertilizer.
Chemical structure characterizes: adopt infrared spectra and nucleus magnetic resonance
13c-NMR composes.
Slow controlled release properties test in water: take 5.00g biodegradable organic polymer nitrogenous fertilizer and put in the culturing bottle that 100mL distilled water is housed, cultivate in the fixed temperature and humidity incubator of 25 DEG C after sealing.Respectively at the 1st, 3,5,7,10,20,30,45,60,90 day, the solution in culturing bottle is filtered, leach fertilizer and return former bottle, and add new distilled water 100mL continuation cultivation.Adopt the total nitrogen content of Kjeldahl nitrogen determination filtrate.
Slow controlled release properties test in soil: test soil takes from the topsoil soils in Shang Lan village, Jiancaoping District, Shanxi province Taiyuan city, and its basic physicochemical property is pH 8.1, organic 9.8g/kg, total soil nitrogen 95.2mg/kg.By test with crossing 1mm sieve after native natural air drying, take 200.00g soil and 0.40g biodegradable organic polymer nitrogenous fertilizer Homogeneous phase mixing, put in culturing bottle, add the distilled water (accounting for the relative water content of soil) of 40%, put in the fixed temperature and humidity incubator of 25 DEG C and cultivate.Respectively at sampling in the 1st, 3,5,7,10,20,30,45,60,90 day, after being separated with fertilizer by soil, adopt the total nitrogen content in Kjeldahl nitrogen determination soil.
Embodiment 1
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is:
1.00mol Urethylane, 0.10mol urea and 0.06mol catalyzer salt of wormwood is added in reaction vessel, 6h is reacted at 160 DEG C, then 0.33mol linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dries, and obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 2%, and hot water dissolving's degree is 32%.
Embodiment 2
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is:
1.00mol Urethylane, 0.10mol urea and 0.06mol catalyzer salt of wormwood is added in reaction vessel, 6h is reacted at 160 DEG C, then 0.026mol linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dries, and obtains biodegradable organic polymer nitrogenous fertilizer.
The nitrogen content of gained biodegradable organic polymer nitrogenous fertilizer is 27.76%, and cold water solubility is 20%, and hot water dissolving's degree is 75%.
Embodiment 3
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is:
1.00mol Urethylane, 0.10mol urea and 0.06mol catalyzer salt of wormwood is added in reaction vessel, 6h is reacted at 160 DEG C, then 0.02mol linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dries, and obtains biodegradable organic polymer nitrogenous fertilizer.
The nitrogen content of gained biodegradable organic polymer nitrogenous fertilizer is 28.25%, cold water solubility is 30%, and hot water dissolving's degree is 81%.
Embodiment 4
1.00mol Urethylane, 0.10mol urea and 0.06mol catalyzer salt of wormwood is added in reaction vessel, 6h is reacted at 160 DEG C, then 0.015mol linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dries, and obtains biodegradable organic polymer nitrogenous fertilizer.
The nitrogen content of gained biodegradable organic polymer nitrogenous fertilizer is 28.79%, and cold water solubility is 40%, and hot water dissolving's degree is 85%.
Embodiment 5
1.00mol Urethylane, 0.10mol urea and 0.06mol catalyzer salt of wormwood is added in reaction vessel, 6h is reacted at 160 DEG C, then 0.011mol linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dries, and obtains biodegradable organic polymer nitrogenous fertilizer.
The nitrogen content of gained biodegradable organic polymer nitrogenous fertilizer is 29.26%, and cold water solubility is 50%, and hot water dissolving's degree is 89%.
Embodiment 6
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is:
1.00mol Urethylane, 0.50mol urea and 0.06mol catalyzer salt of wormwood is added in reaction vessel, 6h is reacted at 160 DEG C, then 0.03mol linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dries, and obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 9%, and hot water dissolving's degree is 39%.
Embodiment 7
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is:
1.00mol Urethylane, 0.01mol urea and 0.06mol catalyzer salt of wormwood is added in reaction vessel, 6h is reacted at 160 DEG C, then 0.015mol linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dries, and obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 73%, and hot water dissolving's degree is 100%.
Embodiment 8
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is:
1.00mol Urethylane, 0.005mol urea and 0.06mol catalyzer salt of wormwood is added in reaction vessel, 6h is reacted at 160 DEG C, then 0.02mol linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dries, and obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 69%, and hot water dissolving's degree is 98%.
Embodiment 9
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is:
1.00mol Urethylane, 0.0067mol urea and 0.06mol catalyzer salt of wormwood is added in reaction vessel, 6h is reacted at 160 DEG C, then 0.04mol linking agent triisocyanate is added, stir, when reaction soln becomes thick, granulation, dries, and obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 58%, and hot water dissolving's degree is 92%.
Embodiment 10: the checking of the nitrogen nutrient preparation predictive model in hydrostatic and evaluation
When the nitrogenous fertilizer of different cold water solubility discharges the 20th day in hydrostatic, verify this predictive model by Nitrogen releasing amount and preparation, results contrast is in table 3.The relative error of visible predictor and measured value can control within 5%, therefore apply the nitrogen nutrient preparation predictive model of nitrogenous fertilizer in hydrostatic of different cold water solubilities that the present invention sets up, can predict that cold water solubility is 20,30,40,50 nitrogen nutrient preparations in hydrostatic under different time of releasing fast and reliablely.
The predictor of the nitrogenous fertilizer nitrogen nutrient preparation of the different cold water solubility of table 3 and measured value
Embodiment 11: the checking of the nitrogen nutrient preparation predictive model in soil and evaluation
When the nitrogenous fertilizer of different cold water solubility discharges the 20th day in soil, verify this predictive model by Nitrogen releasing amount and preparation, results contrast is in table 4.The relative error of visible predictor and measured value can control within 5%, therefore apply the nitrogen nutrient preparation predictive model of nitrogenous fertilizer in soil of different cold water solubilities that the present invention sets up, can predict that cold water solubility is 20,30,40,50 nitrogen nutrient preparations in soil under different time of releasing fast and reliablely.
The predictor of the nitrogenous fertilizer nitrogen nutrient preparation of the different cold water solubility of table 4 and measured value
Claims (5)
1. biodegradable organic polymer nitrogenous fertilizer, is characterized in that, its structural formula is:
N=2 ~ 200 in formula.
2. biodegradable organic polymer nitrogenous fertilizer according to claim 1, it is characterized in that, its preparation method is:
In reaction vessel, add Urethylane, urea and catalyzer salt of wormwood, at 160 DEG C, react 6 h, then add linking agent triisocyanate, stir, when reaction soln becomes thick, granulation, dry, obtain biodegradable organic polymer nitrogenous fertilizer.
3. biodegradable organic polymer nitrogenous fertilizer according to claim 2, is characterized in that, the mol ratio of reactant Urethylane and catalyzer salt of wormwood described in this preparation method is 1.0:0.06.
4. biodegradable organic polymer nitrogenous fertilizer according to claim 2, it is characterized in that, the nutrient release curve of described biodegradable organic polymer nitrogenous fertilizer in hydrostatic is analyzed, the nitrogen nutrient preparation predictive model of nitrogenous fertilizer in hydrostatic of different cold water solubility can be obtained:
Cold water solubility is the Nitrogen Accumulation release rate predictive model of 20: Y=15.85+5.77lnX;
Cold water solubility is the Nitrogen Accumulation release rate predictive model of 30: Y=31.32+6.76lnX;
Cold water solubility is the Nitrogen Accumulation release rate predictive model of 40: Y=34.39+6.07lnX;
Cold water solubility is the Nitrogen Accumulation release rate predictive model of 50: Y=45.13+7.05lnX;
In formula, X is time of releasing, sky;
Y is nitrogen nutrient preparation.
5. biodegradable organic polymer nitrogenous fertilizer according to claim 2, it is characterized in that, the nutrient release curve of described biodegradable organic polymer nitrogenous fertilizer in soil is analyzed, the nitrogen nutrient preparation predictive model of nitrogenous fertilizer in soil of different cold water solubility can be obtained:
Cold water solubility is the Nitrogen Accumulation release rate predictive model of 20: Y=16.03+9.11lnX;
Cold water solubility is the Nitrogen Accumulation release rate predictive model of 30: Y=20.44+7.83lnX;
Cold water solubility is the Nitrogen Accumulation release rate predictive model of 40: Y=29.99+6.28lnX;
Cold water solubility is the Nitrogen Accumulation release rate predictive model of 50: Y=38.77+8.62lnX;
In formula, X is time of releasing, sky;
Y is nitrogen nutrient preparation.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3684771A (en) * | 1971-03-03 | 1972-08-15 | Du Pont | Polyesters with substituted amine end groups |
| CN1047311A (en) * | 1989-05-19 | 1990-11-28 | 三井东圧化学株式会社 | Poly-(isocyanic acid alkyl phenyl) isocyanuric acid ester, its preparation method and its application |
| US20040068054A1 (en) * | 2002-10-04 | 2004-04-08 | Basf Corporation | Powder coatings containing symmetrical additives |
| CN102260195A (en) * | 2010-05-26 | 2011-11-30 | 北京化工大学 | Method for coproducing alkyl carbamate and alkylamide |
| CN103172538A (en) * | 2011-12-23 | 2013-06-26 | 中国科学院兰州化学物理研究所 | Method for synthesis of carbamate under mild conditions |
-
2015
- 2015-05-12 CN CN201510239997.0A patent/CN104892331B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3684771A (en) * | 1971-03-03 | 1972-08-15 | Du Pont | Polyesters with substituted amine end groups |
| CN1047311A (en) * | 1989-05-19 | 1990-11-28 | 三井东圧化学株式会社 | Poly-(isocyanic acid alkyl phenyl) isocyanuric acid ester, its preparation method and its application |
| US20040068054A1 (en) * | 2002-10-04 | 2004-04-08 | Basf Corporation | Powder coatings containing symmetrical additives |
| CN102260195A (en) * | 2010-05-26 | 2011-11-30 | 北京化工大学 | Method for coproducing alkyl carbamate and alkylamide |
| CN103172538A (en) * | 2011-12-23 | 2013-06-26 | 中国科学院兰州化学物理研究所 | Method for synthesis of carbamate under mild conditions |
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