CN101962308B - Method for preparing water-retention fertilizer from aquatic plants - Google Patents
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Abstract
The invention relates to a method for preparing water-retention fertilizer from aquatic plants, comprising the followings steps: using aquatic plants of water hyacinth, Potamogeton crispus L, and alternanthera philoxeroides as raw materials, using haloacetic acid and potassium salt thereof or carbon disulfide in alkaline solution containing potassium ion as chemical modifier, and using FeCl3 or AlCl3 as cross-linking agent so as to obtain aquatic plant fiber with water absorption and water retention property. In the invention, a large amount of aquatic plant fiber generated by ecosystem restoration of water and pollution prevention engineering is used so as to ensure long time operation of ecosystem restoration engineering. The water-retention fertilizer prepared by the invention can regulate water in soil, supply potassium fertilizer and nitrogen fertilizer in soil after applying since containing the potassium ion, ammonia water, and urea. The natural aquatic plant fiber is used as basis material to prepare water-retention fertilizer which can be completely biodegraded, can improve soil structure and can prevent hardening of tilled land.
Description
Technical field
The present invention relates to the later use treatment process of waterplant, relate in particular to and utilize water ecology reparation and prevention and cure of pollution to produce the method that waterplant body (as: Herba Eichhorniae, Herba potamogetonis distincti, water peanut, poly-grass, water caltrop etc.) prepares water keeping fertilizer.
Background technology
Herba Eichhorniae, Herba potamogetonis distincti, water peanut, poly-grass, water caltrop etc. are common fresh water growing plants, are the growth of generally acknowledging plants faster, also are effective plants of water ecology reparation and prevention and cure of pollution.Nutritive elements such as the nitrogen phosphorus in their process of growth in the rapid absorption water, and have very strong soil pick-up ability, thus be widely used in the improvement of sewage purification and eutrophic water body.But the untimely cleaning of the waterplant of rich length can stop up the river course, influence traffic, even causes the ecological chain overbalance.How to utilize these waterplant, become the bottleneck that can the water ecology recovery project long-acting operation.At present, the method of utilizing of waterplant such as relevant Herba Eichhorniae, Herba potamogetonis distincti, water peanut mainly contains 3 kinds: 1. do fodder additives (Liang Meijuan etc. the feasibility analysis [J] of waterplant manufacture order cell protein feed. the Guangzhou chemical industry, 2009,37(1): 136～138; History Yangjing etc. the research report [J] of the aquatic plant feed in downstream, the Yalu River. Liaodong College journal (natural science edition), 2009,16(1): 1～4); 2. be used for biological fermentation (Zhang Yi etc. waterplant pressing filtering liquid anaerobically fermenting condition test [J]. the rural ecological environment, 2005,21(3): 54～57; Cheng Jun etc. the analysis of Influential Factors [J] of hydrogen is produced in mud and Herba Eichhorniae mixed fermentation. Wuhan University of Technology's journal. 2006,28(2): 209～214; Look into monarch etc. the biogas fermentation research [J] after the Herba Eichhorniae solid-liquid separation of Dian Chi, Chinese wild plant resource, 2008,27(1): 36～38); 3. be used for papermaking, make plank, handicraft and furniture (Peng Qinglin. the development and use of Herba Eichhorniae [J]. development of resources and market, 2003,19(1): 32～33).But owing to be water more than 90% in these waterplant bodies, utilising efficiency is all very low during as such use.Therefore, be used for the water ecology reparation at present and be difficult to utilize with the plant materials that prevention and cure of pollution produce, cause the more serious pollution of water body after rotten in water, make the restoration of the ecosystem engineering be difficult to long-acting operation.
In view of utilizing waterplant to carry out the problems referred to above that face in water ecology reparation and the prevention and cure of pollution engineering at present, the present invention proposes by chemical treatment waterplant to be made the method for water keeping fertilizer, use it for soil improvement and agriculture production, thereby a large amount of waterplant fibers that water ecology reparation and prevention and cure of pollution engineering are produced are realized recycling, can long-acting operation to guarantee the restoration of the ecosystem engineering.
Summary of the invention
The purpose of this invention is to provide a kind of method of utilizing waterplant systems such as Herba Eichhorniae, Herba potamogetonis distincti, water peanut, poly-grass, water caltrop to be equipped with water keeping fertilizer, use it for soil improvement and agriculture production, thereby a large amount of waterplant fibers that water ecology reparation and prevention and cure of pollution engineering are produced are realized recycling, can long-acting operation to guarantee the restoration of the ecosystem engineering.
Problem to be solved by this invention is by with the method for chemical modification, introduces hydrophilic radical-CH at a large amount of waterplant fibers that water ecology reparation and prevention and cure of pollution engineering produce
2COO
-With-CSS
-, and by adding linking agent FeCl
3, AlCl
3Deng the method for high price metal-salt, make it form reticulated structure, thereby improve its suction multiple, reaction formula is as follows:
Wherein, X represents halogens such as Cl, Br; M is high volence metal ions such as Fe, Al.
The technical solution adopted in the present invention is: waterplant prepares the method for organic water keeping fertilizer, comprises chemical modification and the water keeping fertilizer preparation of raw materials pretreatment, waterplant, and concrete steps are as follows:
One, raw materials pretreatment: will salvage after fresh waterplant body cleans, drainage, chopping, stirring pulping directly utilize, or drys, pulverize, sieve, and make hay powder, and be standby, and wherein said waterplant is Herba Eichhorniae, Herba potamogetonis distincti, water peanut, gathers grass or water caltrop etc.;
Two, waterplant base chemical modified fiber method:
The preparation method of A, waterplant base carboxy cellulose:
(1) urea, KOH and a certain amount of dry water plant powder end or fresh straw pulp are joined in ethanol, acetone or the water solvent, after stirring, placed refrigerator 2 ~ 15 hours;
(2) after the taking-up, place in the heating jacket, add Mono Chloro Acetic Acid, potassium chloroacetate or bromoacetic acid potassium as chemical modifier, at 50～70 ℃ of constant temperature stirring reaction 3～8h;
Wherein the whole process of preparation material ratio is as follows in mass:
m
Waterplant fiber dry powder: m
Chemical modifier: m
KOH: m
Urea=1.0:0.5～1.5:1.0:0.75;
Perhaps m
Fresh waterplant straw pulp: m
Chemical modifier: m
KOH: m
Urea=10.0:0.13～0.38:0.25:0.19
(3) question response finishes the back suction filtration, and the gained filter cake namely gets carboxylated waterplant Mierocrystalline cellulose with aqueous ethanolic solution washing 3 times, and its water conservation multiple is that 15～70(filamentary material and goods thereof immerse that institute absorbs the weight of water to the ratio of its preceding butt weight of soaking in the water);
Perhaps according to B, the cellulosic preparation method of waterplant base xanthate:
(1) with dry water plant powder or fresh waterplant straw pulp, join in 10 ~ 20%KOH solution, stirring, temperature reaction, filtration press dry alkali lye, and waterplant base Mierocrystalline cellulose must alkalize;
The alkalization waterplant that (2) will make base Mierocrystalline cellulose changes in the there-necked flask, adds the basic solution of 5%～15%KOH again, slowly splashes into dithiocarbonic anhydride, and its quality is cellulosic 20%～60% for alkalization, stirs temperature reaction 2～6h;
(3) filter, with the MgCl of filter cake elder generation with 50～150mL 2 ~ 10%
2Solution washing 3 times, the ethanolic soln washing is 5 times again, gets the xanthate Mierocrystalline cellulose, and its suction multiple is 10～40.
Three, water keeping fertilizer preparation method:In filling the beaker of distilled water, stir fast, add ammoniacal liquor, urea and linking agent, slowly add the waterplant base xanthate Mierocrystalline cellulose or the waterplant base carboxy cellulose that prepare in the step 2 again, namely make waterplant base water keeping fertilizer after continuing to stir 0.5 ~ 1.0h, wherein said linking agent is iron trichloride or aluminum chloride etc., and wherein material ratio is in mass: V
Distilled water: m
Waterplant Mierocrystalline cellulose after the chemical modification: m
Linking agent: m
Ammoniacal liquor: m
Urea=100:1:0.15%～0.7%:0.03:0.15.
Beneficial effect of the present invention:The present invention realizes recyclings with a large amount of waterplant fibers that water ecology reparation and prevention and cure of pollution engineering produce, can long-acting operation to guarantee the restoration of the ecosystem engineering.The water keeping fertilizer of the present invention preparation, the effect that owing to wherein contain potassium ion, ammoniacal liquor, urea, can play and regulate moisture in the soil, replenish potash fertilizer and nitrogenous fertilizer in the soil after using.And be that the water keeping fertilizer of basic material preparation fully can biological degradation with natural water raw vegetable fibre element, can improve Soil structure, prevent the degeneration of hardening of ploughing.
Embodiment
The invention will be further described below in conjunction with example.
Example 1,
(1) raw material choosing method:
The Herba Eichhorniae that salvages is cleaned, shreds the back, dried, pulverizes, sieves, choose 20 ~ 40 purpose hay powder, standby;
(2) chemical modification method of waterplant (preparation of waterplant carboxylated fiber):
In the there-necked flask of 250mL, add 4g Herba Eichhorniae powder and 80mL and contain 95% the industrial alcohol mixing solutions of 3g urea, 3gKOH, after stirring, in 2 ℃ refrigerator, place 15h; Taking-up places in the heating jacket, adds the Mono Chloro Acetic Acid of 4g, treats that temperature rises to 70 ℃, and constant temperature stirs 1.5h; Under 70 ℃, continue reaction, begin cooling behind the 1h, suction filtration after temperature is down to 30 ℃, filter cake washs 3 times with the aqueous ethanolic solution of 85% concentration.Dry 4h under 60 ℃ is with solid porphyrize, standby.
(3) water keeping fertilizer preparation method:
Measure in 100mL distilled water and the 250mL beaker, stir certain hour fast, add 0.3% linking agent FeCl then
3, continue to stir 10min after, slowly add 1.00g Herba Eichhorniae carboxy cellulose, stir 1h fast after, namely get Herba Eichhorniae base water keeping fertilizer.With respect to the Herba Eichhorniae matrix, potassium content is 12.7%, and nitrogen content is 9.8%.The suction multiple of this example is 48.
Example 2,
This example is that chloroacetic consumption is 2.0g with example 1 difference, and temperature of reaction is 60 ℃, and the reaction times is 3h, and other preparation process is identical with example 1.With respect to the Herba Eichhorniae matrix, potassium content is 11.3%, and nitrogen content is 10.2%.The suction multiple of this example is 20.
Example 3,
This example is that chloroacetic consumption is 6.0g with example 1 difference, and temperature of reaction is 50 ℃, and the reaction times is 8h, and other preparation process is identical with example 1.With respect to the Herba Eichhorniae matrix, potassium content is 13.5%, and nitrogen content is 9.5%.Its suction multiple of this example is 62.
Example 4,
This example is to use AlCl with example 1 difference
3Make linking agent, its consumption is 0.5%.Other preparation process is identical with example 1.With respect to the Herba Eichhorniae matrix, potassium content is 12.3%, and nitrogen content is 10.3%.The suction multiple of this example is 70.
Example 5,
This example is that chloroacetic consumption is 6.0g with example 1 difference, and temperature of reaction is 50 ℃, and the reaction times is 8h; AlCl
3Make linking agent, its consumption is 0.7%, and other preparation process is identical with example 1.With respect to the Herba Eichhorniae matrix, potassium content is 12.9%, and nitrogen content is 9.8%.The suction multiple of this example is 15.
Example 6,
This example is to use ClCH with example 1 difference
2COOK does chemical modifier, and its consumption is 4.0g, and temperature of reaction is 70 ℃, and the reaction times is 5h, and other preparation process is identical with example 1.With respect to the Herba Eichhorniae matrix, potassium content is 13.7%, and nitrogen content is 11.2%.The suction multiple of this example is 40.
Example 7,
This example is to use BrCH with example 1 difference
2COOK does chemical modifier, and its consumption is 4.0g, and temperature of reaction is 70 ℃, and the reaction times is 6h, and other preparation process is identical with example 1.With respect to the Herba Eichhorniae matrix, potassium content is 13.2%, and nitrogen content is 8.9%, and the suction multiple of this example is 56.
Example 8,
This example is to make solvent with acetone with example 1 difference, and the time of placing in refrigerator is 8h, and its preparation method is identical with example 1.With respect to the Herba Eichhorniae matrix, potassium content is 12.7%, and nitrogen content is 8.2%.The suction multiple of this example is 50.
Example 9,
This example is that water is cooked solvent with example 1 difference, and the time of placing in refrigerator is 4h, and its preparation method is identical with example 1.With respect to the Herba Eichhorniae matrix, potassium content is 12.5%, and nitrogen content is 10.7%.The suction multiple of this example is 38.
Example 10,
This example is to do raw material with Herba potamogetonis distincti dry powder with example 1 difference, and its preparation method is identical with example 1.With respect to the Herba potamogetonis distincti matrix, potassium content is 11.5%, and nitrogen content is 11.3%.The suction multiple of this example is 42.
Example 11,
This example is to do raw material with water peanut dry powder with example 1 difference, and its preparation method is identical with example 1.With respect to the water peanut matrix, potassium content is 12.7%, and nitrogen content is 10.2%.The suction multiple of this example is 48.
Example 15,
This example is to do raw material with poly-careless dry powder with example 1 difference, and its preparation method is identical with example 1.With respect to poly-careless matrix, potassium content is 12.5%, and nitrogen content is 9.5%.The suction multiple of this example is 45.
Example 13,
This example is to do raw material with water caltrop dry powder with example 1 difference, and its preparation method is identical with example 1.With respect to the water caltrop matrix, potassium content is 12.4%, and nitrogen content is 8.1%.The suction multiple of this example is 43.
Example 14
(1) raw material choosing method:
After the Herba Eichhorniae that salvages was cleaned, shredded, homogenate was standby;
(2) chemical modification method of waterplant (preparation of Herba Eichhorniae carboxylated fiber):
Add in the there-necked flask of 500mL after 17gKOH and 40g Herba Eichhorniae straw pulp stir, at 30 ℃ of stirring reactions, the 1h after-filtration goes out superfluous alkali and is dissolved in polyose in the alkali lye; After then the Herba Eichhorniae that leaches alkalization Mierocrystalline cellulose being taken out, be transferred to the 100mL there-necked flask, and add the industrial alcohol that 60mL contains 4gKOH and 4g chloroacetic 95%, intensification degree to 70 ℃, constant temperature stirs 3.0h; Reaction finishes the back cooling, when temperature is down to 30 ℃, uses in the dilute hydrochloric acid and unnecessary potassium hydroxide, reaction 30min.Follow suction filtration, filter cake washs 3 times with certain density aqueous ethanolic solution.Filter cake is put into baking oven, at 60 ℃ of following dry 4h, treat complete drying after, with the solid porphyrize, standby.
(3) water keeping fertilizer preparation method:
Measure in 100mL distilled water and the 250mL beaker, stir certain hour fast, add 0.3% linking agent FeCl then
3, and behind the ammoniacal liquor of the 0.03g continuation stirring 10min, slowly add 1.00g Herba Eichhorniae carboxy cellulose, and stir 1.5h fast, namely get waterplant base water keeping fertilizer.With respect to the Herba Eichhorniae matrix, potassium content is 11.6%g, and nitrogen content is 2.75%.The suction multiple of this example is 45.
Example 15
(1) raw material choosing method:
The Herba Eichhorniae that salvages shreds, dries, pulverizes, sieves after cleaning, and chooses the grass meal of 20 order sizes, and is standby;
(2) chemical modification method of waterplant (preparation of waterplant xanthate fiber):
The first step: the 4g size is the KOH solution of the plain powder of 20 purpose water hyacinth fibres and 50mL 17% in the there-necked flask of 250mL, at 30 ℃ of stirring reaction 1h, make Mierocrystalline cellulose and KOH in the Herba Eichhorniae that quaternization take place, produce soda cellulose, filter out superfluous alkali then and be dissolved in polyose in the alkali lye, get Herba Eichhorniae alkalization Mierocrystalline cellulose; Second step: the alkalization Mierocrystalline cellulose that will make drops in the there-necked flask of 250mL, the KOH solution that adds 50mL 10%, temperature is controlled at 30 ℃, slowly splash into 2.0g dithiocarbonic anhydride, isothermal reaction 4h, the magnesium salt solution of adding 5%, and stir the regular hour after-filtration, with filter cake with rare magnesium salt solution and ethanolic soln wash to pH be 8, get the plain xanthate of moisture water hyacinth fibre.Filter cake is put into the constant temperature air dry oven, treat complete drying after, with the solid porphyrize, standby.
(3) water keeping fertilizer preparation method: measure in 100mL distilled water and the 250mL beaker, stir certain hour fast, once add 0.3% linking agent FeCl then
3, and behind the urea of the 0.15g continuation stirring 10min, slowly add the plain xanthate of 1.00g water hyacinth fibre, and stir 1.0h fast, namely get waterplant base water keeping fertilizer.With respect to the Herba Eichhorniae matrix, potassium content is 9.3%, and nitrogen content is 6.88%.The suction multiple of this example is 38.
Example 16
This example and example 15 differences are that the concentration of KOH in second step of (2) is that the consumption of 5%, CS2 is 0.2g, and the reaction times is 2h, and its preparation method is identical with example 15.With respect to the Herba Eichhorniae matrix, potassium content is 8.4%, and nitrogen content is 6.88%.The suction multiple of this example is 10.
Example 17
This example and example 15 differences are that the concentration of KOH in second step of (2) is that the consumption of 15%, CS2 is 2.4g, and the reaction times is 6h, and its preparation method is identical with example 15.With respect to the Herba Eichhorniae matrix, potassium content is 10.8%, and nitrogen content is 6.88%.The suction multiple of this example is 28.
Example 18
This example is to use AlCl with example 15 differences
3Make linking agent, its consumption is 0.4%, and its preparation method is identical with example 15.With respect to the Herba Eichhorniae matrix, potassium content is 9.5%, and nitrogen content is 6.88%.The suction multiple of this example is 40.
Example 19
This example is to add 0.03g ammoniacal liquor to do additive with example 15 differences, and its preparation method is identical with example 15.With respect to the Herba Eichhorniae matrix, potassium content is 9.7%, and nitrogen content is 6.88%.The suction multiple of this example is 37.
Example 20
This example is to add ammoniacal liquor to do additive, AlCl with example 15 differences
3Make linking agent, its consumption is respectively 0.03g, 0.6%, and its preparation method is identical with example 15.With respect to the Herba Eichhorniae matrix, potassium content is 8.5%, and nitrogen content is 2.75%.The suction multiple of this example is 38.
Example 21
This example is to do raw material with Herba potamogetonis distincti dry powder with example 15 differences, and its preparation method is identical with example 15.With respect to the Herba potamogetonis distincti matrix, potassium content is 9.4%, and nitrogen content is 2.75%.The suction multiple of this example is 35.
Example 22
This example is to do raw material with water peanut dry powder with example 15 differences, and its preparation method is identical with example 15.With respect to the water peanut matrix, potassium content is 9.4%, and nitrogen content is 6.88%.The suction multiple of this example is 38.
Example 23
This example is to do raw material with poly-careless dry powder with example 15 differences, and its preparation method is identical with example 15.With respect to poly-careless matrix, potassium content is 9.3%, and nitrogen content is 6.88%.The suction multiple of this example is 32.
Example 24
This example is to do raw material with water caltrop dry powder with example 15 differences, and its preparation method is identical with example 15.With respect to the water caltrop matrix, potassium content is 9.2%, and nitrogen content is 6.88%.The suction multiple of this example is 35.
Example 25
(1) raw material choosing method:
After the Herba Eichhorniae that salvages was cleaned, shredded, homogenate was standby;
(2) chemical modification method of waterplant (preparation of waterplant xanthate fiber):
Add in the there-necked flask of 500mL after 40g Herba Eichhorniae straw pulp and 17gKOH stir, at 30 ℃ of stirring reactions, the 1h after-filtration goes out superfluous alkali and is dissolved in polyose in the alkali lye; After then the Herba Eichhorniae alkalization Mierocrystalline cellulose that leaches being taken out, be transferred to the 100mL there-necked flask, and add 50mL contain 10% KOH solution with temperature control at 30 ℃, slowly splash into 1.5g dithiocarbonic anhydride, isothermal reaction 2h, the magnesium salt solution of adding 5%, and stir the regular hour after-filtration, with filter cake with rare magnesium salt solution and ethanolic soln wash to pH be 8, get the plain xanthate of moisture water hyacinth fibre.Filter cake is put into the constant temperature air dry oven, treat complete drying after, with the solid porphyrize, standby.
(3) water keeping fertilizer preparation method:
Measure in 100mL distilled water and the 250mL beaker, stir certain hour fast, once add 0.4% linking agent FeCl then
3, and behind the ammoniacal liquor of the 0.03g continuation stirring 10min, slowly add 1.00g Herba Eichhorniae carboxy cellulose, and stir 0.5h fast, namely get waterplant base water keeping fertilizer.With respect to the Herba Eichhorniae matrix, potassium content is 8.8%, and nitrogen content is 2.75%.The suction multiple of this example is 32.
Claims (2)
1. waterplant prepares the method for organic water keeping fertilizer, comprises chemical modification and the water keeping fertilizer preparation of raw materials pretreatment, waterplant, it is characterized in that concrete steps are as follows:
One, raw materials pretreatment: will salvage after fresh waterplant body cleans, drainage, chopping, stirring pulping directly utilize, or dry, pulverize, sieve, and make hay powder, standby, wherein said waterplant is Herba Eichhorniae, Herba potamogetonis distincti, water peanut, poly-grass or water caltrop;
Two, waterplant base chemical modified fiber method:
(1) urea, KOH and a certain amount of dry water plant powder end or fresh straw pulp are joined in ethanol, acetone or the water solvent, after stirring, placed refrigerator 2 ~ 15 hours;
(2) after the taking-up, place in the heating jacket, add Mono Chloro Acetic Acid, potassium chloroacetate or bromoacetic acid potassium as chemical modifier, at 50～70 ℃ of constant temperature stirring reaction 3～8h;
Wherein the whole process of preparation material ratio is as follows in mass:
m
Waterplant fiber dry powder: m
Chemical modifier: m
KOH: m
Urea=1.0:0.5～1.5:1.0:0.75;
Perhaps m
Fresh waterplant straw pulp: m
Chemical modifier: m
KOH: m
Urea=10.0:0.13～0.38:0.25:0.19
(3) question response finishes the back suction filtration, and the gained filter cake namely gets carboxylated waterplant Mierocrystalline cellulose with aqueous ethanolic solution washing 3 times, and its water conservation multiple is 15～70;
Three, water keeping fertilizer preparation method:In filling the beaker of distilled water, stir fast, add ammoniacal liquor, urea and linking agent, slowly add the carboxylated waterplant Mierocrystalline cellulose for preparing in the step 2 again, namely make waterplant base water keeping fertilizer after continuing to stir 0.5 ~ 1.0h, wherein said linking agent is iron trichloride or aluminum chloride, and wherein material ratio is: V
Distilled water: m
Waterplant Mierocrystalline cellulose after the chemical modification: m
Linking agent: m
Ammoniacal liquor: m
Urea=100:1:0.15～0.7:0.03:0.15.
2. waterplant according to claim 1 prepares the method for organic water keeping fertilizer, it is characterized in that wherein step 2, waterplant base chemical modified fiber method also can be carried out according to the cellulosic preparation method of waterplant base xanthate:
(1) with dry water plant powder or fresh waterplant straw pulp, join in 10 ~ 20%KOH solution, stirring, temperature reaction, filtration press dry alkali lye, and waterplant base Mierocrystalline cellulose must alkalize;
The alkalization waterplant that (2) will make base Mierocrystalline cellulose changes in the there-necked flask, adds the basic solution of 5%～15%KOH again, slowly splashes into dithiocarbonic anhydride, and its quality is cellulosic 20%～60% for alkalization, stirs temperature reaction 2～6h;
(3) filter, with the MgCl of filter cake elder generation with 50～150mL 2 ~ 10%
2Solution washing 3 times, the ethanolic soln washing is 5 times again, gets the xanthate Mierocrystalline cellulose, and its suction multiple is 10～40.
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| CN102827612A (en) * | 2012-09-20 | 2012-12-19 | 四川省农业科学院土壤肥料研究所 | Soil water-holding agent and application method thereof |
| CN103159552B (en) * | 2013-03-05 | 2014-12-03 | 漳州职业技术学院 | Slow release fertilizer based on banana tree stalk and stem powder as well as preparation method |
| CN103483028B (en) * | 2013-09-23 | 2015-05-20 | 安徽大学 | Preparation method for typha angustifolia organic fertilizer |
| CN105985148A (en) * | 2015-03-04 | 2016-10-05 | 泰兴市耕地质量保护站 | Method for treating alternanthera philoxeroides |
| CN105461464B (en) * | 2016-01-12 | 2019-03-19 | 中国科学院合肥物质科学研究院 | A kind of preparation method of anti-oxidant controlled release ferro element foliar fertilizer |
| CN106747727A (en) * | 2016-12-04 | 2017-05-31 | 钦州市星火计划办公室 | A kind of water plant water keeping fertilizer and preparation method thereof |
| CN106518199A (en) * | 2016-12-04 | 2017-03-22 | 钦州市星火计划办公室 | Saline-alkali soil peanut fertilizer and preparation method thereof |
| CN106819646A (en) * | 2016-12-31 | 2017-06-13 | 新昌县润普水产科技有限公司 | A kind of preparation method of Novel straw pulp |
| CN108283128A (en) * | 2018-01-31 | 2018-07-17 | 常州大学 | A kind of production method of flowers and trees cultivated soil |
| CN114645477A (en) * | 2020-12-21 | 2022-06-21 | 常州大连理工大学智能装备研究院 | System and method for preparing water-retaining fertilizer by using aquatic plants |
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| CN101293631A (en) * | 2008-06-18 | 2008-10-29 | 华东理工大学 | Uses of water hyacinth |
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| CN101293631A (en) * | 2008-06-18 | 2008-10-29 | 华东理工大学 | Uses of water hyacinth |
| CN101444719A (en) * | 2008-12-12 | 2009-06-03 | 刘益贵 | Biosorption agent and application method thereof |
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