CN102690140A - Special water retention fertilizer for sweet potatoes and preparation method thereof - Google Patents
Special water retention fertilizer for sweet potatoes and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a special water retention fertilizer for sweet potatoes and a preparation method thereof. The special water retention fertilizer for sweet potatoes is prepared from the following raw materials in parts by weight: 7-12 parts of available nitrogen (N), 6-9 parts of available phosphorus (P2O5), 20-25 parts of available potassium (K2O), 8-10 parts of sodium polyacrylate, 2-5 parts of polyacrylamide and 5-9 parts of bentonite. The special water retention fertilizer for sweet potatoes has the advantage of scientific nitrogen-phosphorus-potassium nutrient proportion, integrates both fertilizer and water, combines nutrition and water retention, and can enhance the water and fertility retention properties of soil and the water/fertilizer utilization efficiency of the sweet potatoes. When being spread as a base fertilizer at one time before sweet potato ridge forming, the special water retention fertilizer for sweet potatoes can promote the sweet potato root system to absorb water in the rooting and seedling stage, increase the growth rate of the sweet potatoes in the early stage, shorten the field ridge seal time of the sweet potatoes, and reduce the field moisture evaporation; and the contained nutrients are slowly released to prevent the stems and leaves of the sweet potatoes from vigorous growth and promote fruiting of the sweet potatoes, thereby enhancing the yield of the dry farming sweet potatoes.
Description
Technical field
The present invention relates to the agricultural fertilizer technical field, specifically a kind of sweet potato water conservation dedicated fertilizer and preparation method thereof.
Background technology
The special-purpose fertilizer of crop is the materialization technical products of balance fertilizing, is culture fertility and the essential condition that promotes the lasting raising the output of crop.Crop special-purpose fertile pointed and regional by force, utilization rate of fertilizer is high, saving labor force and advantage such as multi-functional when using; It is the first-selected fertilizer variety of vast farmers fertilising; Represent the developing direction of fertilizer from now on, receive the attention of science and technology research and development unit, popularizing department, fertilizer business and government functional department.The special-purpose fertilizer of the crop of succeeding in developing at present focuses mostly on crops such as wheat, paddy rice, vegetables and cottons, and the report of special fertilizer for sweet potato seldom.
Sweet potato is different from sexual propagation crops such as wheat, paddy rice, corn, and it does not have the tangible etap, does not have the tangible ripening stage yet, and the expanding all to belong to of the growth of sweet potato root, stem, leaf and piece root nourished and grown.Many peasants do not understand sweet potato needs fertile characteristic and soil fertility; Do not understand the element formula ratio of various straight fertilizers, the nutrient proportioning of fertilising is uneven, and the result often causes the peasant to use a large amount of fertilizer; Sweet potato is not only increased production; Even the underproduction appears, simultaneously a large amount of nutrients causes the eutrophication pollution of water body at rainy season the leaching loss entering face of land and body of groundwater.Though sweet potato is drought-enduring, water stress still can produce significantly influence to osmoregulation, oxygen scavenging activity, photosynthesis characteristics, cauline leaf and piece root growth and the ultimate capacity of sweet potato.Sweet potato is transplanted the many places, back in the weather arid stage, and arid causes soil moisture content deficiency on the ridge, and slow, the slow seedling of sweet potato root of hair is slow, has delayed sweet potato and has got into climing potato and long-term.Sweet potato water conservation dedicated fertilizer and preparation method thereof is to this two hang-up that exists in producing, according to soil characteristic and sweet potato regulation of fertilizer requirement, the dedicated fertilizer of developing the nutrient scientific formulation and having the water-absorbing-retaining function.
Patent retrieval shows that 200810001774.0 disclose a kind of special fertilizer for sweet potato that is mixed by proportioning by ammonium chloride, urea, monoammonium phosphate, superphosphate of lime and Repone K, this special fertilizer for sweet potato nitrogenous (N) 10-15%, Vanadium Pentoxide in FLAKES (P
2O
5) 5-8%, potassium oxide (K
2O) 20-25%.200810014649.3 disclose a kind of special control-release fertilizer for sulfur and resin coated sweet potato and preparation method thereof, component is composite makes with 3% sulfur and resin coated composite fertilizer, 4% sulfur and resin coated composite fertilizer, 5% sulfur and resin coated composite fertilizer, 3% sulfur and resin coated urea, 4% sulfur and resin coated saltpetre, compound potassium sulfate fertilizer etc.Above patent has been developed rational npk nutrient proportioning product or nutrient slowly-released product to the sweet potato nutrient uptake feature, but two products all do not possess water retaining function, can not solve the drought resisting problem after sweet potato is transplanted.
Summary of the invention
Technical assignment of the present invention provides a kind of sweet potato water conservation dedicated fertilizer and preparation method thereof.
Technical assignment of the present invention realizes that by following mode the raw materials used weight part proportioning of this sweet potato water conservation dedicated fertilizer and preparation method thereof is following:
7～12 parts of available nitrogens (N); Available phosphorus (P
2O
5) 6～9 parts; Effective potassium (K
2O) 20～25 parts; 8～10 parts of ZX-Is; 2～5 parts of SEPIGEL 305s; 5～9 parts of wilkinites.
Said available nitrogen is one or more the mixture in granular urea, ammonium sulfate or the coated carbamide.
Said available phosphorus is one or more the mixture in particulate state phosphoric acid two ammoniums, monoammonium phosphate, double superhosphate or the superphosphate of lime.
Said effective potassium is one or both the mixture in particulate state vitriolate of tartar or the Repone K.
The preparation method of sweet potato water conservation dedicated fertilizer is following:
At first take by weighing an amount of boron-moisten soil, add an amount of particulate state SEPIGEL 305, after stirring, add an amount of particulate state ZX-I again, the speed with 60～100 commentaries on classics/min under the normal temperature and pressure stirs, as A group raw material for standby;
Take by weighing suitable quantity of water dissolubility available nitrogen, available phosphorus and effective k particle shape fertilizer, join in the disc type feeding machine, the speed with 60～200 commentaries on classics/min stirs at normal temperatures and pressures, as B group raw material for standby;
A group raw material with preparation joins in the B group raw material of disc type feeding machine then, and the speed with 60～90 commentaries on classics/min stirs at normal temperatures and pressures, and metering is packaged as finished product at last.
Sweet potato water conservation dedicated fertilizer and preparation method thereof is fit to all kinds of tuber crops to be used, mainly as base manure, turn over or ridging before disposable base execute, every mu of consumption is 35～50 kilograms.Compare with the conventional fertilizer contrast of identical nutrient, can make hilly area sweet potato raising the output 16～37%, make sandy soil district, Plain yield of sweet potato increase 15-20%.
Sweet potato water conservation dedicated fertilizer of the present invention is compared with prior art, has following functional characteristics:
1) WUEL of raising sweet potato.After being manured into soil, can from malaria and lower soil, absorb moisture, increase topsoil soils moisture, effectively suppress the topsoil soils moisture evaporation, make topsoil soils keep moist,, improve the utilising efficiency of available water in the soil to supply with the suction of sweet potato root system.
2) can improve the nutrientuse efficiency of sweet potato.The high molecular polymer that product contains can form many " miniature reservoirs " in soil; Its distinctive hydrophilic radical can be fixed on absorptions such as yin, yang nutrient ion in the fertilizer and polar group in the soil; Slowly discharge and be made for the thing utilization, the minimizing nutrient loss.
3) fertilizer nutrient reasonable ratio.Npk nutrient content in this fertilizer forms to sweet potato nutrient uptake feature and soil fertility situation proportioning, and have the proportioning science, satisfy the required nutrient supply of sweet potato high yield, and saving labor force when using.
4) improve Soil structure.After SEPIGEL 305 dissolved in water, its polymer interacted with soil particle, can form the bigger floc sedimentation of volume; Promote the formation of topsoil soils coacervate; Thereby improve Soil structure, improve soil infiltration rate, increase soil moisture content; Reduce rainwash, improve the preserve moisture and fertility ability of soil.
5) high molecular polymer that contains in this product, water-swelling is shunk with discharging repeatedly, and result of use can keep 2-3 in sweet potato produces.
Embodiment
Embodiment 1: the sweet potato water conservation dedicated fertilizer preparation of nutrient content 10-8-22
At first take by weighing the 7.9kg boron-moisten soil; Add 3.1kg particle SEPIGEL 305 (production of Langfang City nova chemical industry ltd); After stirring; Add 9.3kg particle ZX-I (production of Shandong Wan Hua Chemical Industry Science Co., Ltd) again, the speed with 60～100 commentaries on classics/min under the normal temperature and pressure stirs, as A group raw material for standby;
Take by weighing 17.5kg granular urea (containing N mass percent 46%), the 18.2kg monoammonium phosphate (contains N mass percent 11%, contains P
2O
5Mass percent 44%) and the 44kg granular potassium sulfate (contain K
2O mass percent 50%), join in the disc type feeding machine, the speed with 60～200 commentaries on classics/min stirs at normal temperatures and pressures, as B group raw material for standby;
A group raw material with preparation joins in the B group raw material in the disc type feeding machine then, and the speed with 60～90 commentaries on classics/min stirs at normal temperatures and pressures, and metering is packaged as finished product at last.
Embodiment 2: the sweet potato water conservation dedicated fertilizer preparation of nutrient content 12-9-20
At first take by weighing the 8kg boron-moisten soil; Add 3kg particle SEPIGEL 305 (production of Langfang City nova chemical industry ltd); After stirring; Add 9kg particle ZX-I (production of Shandong Wan Hua Chemical Industry Science Co., Ltd) again, the speed with 60～100 commentaries on classics/min under the normal temperature and pressure stirs, as A group raw material for standby;
The mixture, the 19.6kg particle diammonium phosphate that take by weighing 16.8kg granular urea (containing N mass percent 46%) and ammonium sulfate (containing N mass percent 20%) (contain N mass percent 18%, contain P
2O
5Mass percent 46%), the 39.1kg granular potassium sulfate (contains K
2O mass percent 50%) and Repone K (contain K
2O mass percent 60%) mixture joins above-mentioned raw materials in the disc type feeding machine, and the speed with 60～200 commentaries on classics/min stirs at normal temperatures and pressures, as B group raw material for standby;
A group raw material with preparation joins in the B group raw material of disc type feeding machine then, and the speed with 60～90 commentaries on classics/min stirs at normal temperatures and pressures, and metering is packaged as finished product at last.
Embodiment 3: the sweet potato water conservation dedicated fertilizer preparation of nutrient content 7-6-25
At first take by weighing the 6.2kg boron-moisten soil; Add 2.7kg particle SEPIGEL 305 (production of Langfang City nova chemical industry ltd); After stirring; Add 8.1kg particle ZX-I (production of Shandong Wan Hua Chemical Industry Science Co., Ltd) again, the speed with 60～100 commentaries on classics/min under the normal temperature and pressure stirs, as A group raw material for standby;
Take by weighing the mixture of 20.7kg granular urea (containing N mass percent 46%), ammonium sulfate (containing N mass percent 20%) and coated carbamide (containing N mass percent 44%); 17.3kg particle double superhosphate (contains P
2O
5Mass percent 44%) and superphosphate of lime (contain P
2O
5Mass percent 12%) mixture; 45.0kg granular potassium sulfate (contains K
2O mass percent 50%) and Repone K (contain K
2O mass percent 60%) mixture joins above-mentioned three kinds of raw materials in the disc type feeding machine, and the speed with 60～200 commentaries on classics/min stirs at normal temperatures and pressures, as B group raw material for standby;
A group raw material with preparation joins in the B group raw material of disc type feeding machine then, and the speed with 60～90 commentaries on classics/min stirs at normal temperatures and pressures, and metering is packaged as finished product at last.
Effect:
The sweet potato water conservation dedicated fertilizer of this invention has carried out field fertilizer efficiency on the different sweet potato varieties of Jinan City's Pingying County.
(1) this sweet potato water conservation dedicated fertilizer is to the influence of starch-type Ji potato 21 yield and qualities
Pingying County peace cold meal village, town and country carries out in the Jinan City in test, and test soil is middle and southern in Shandong Province hilly area cinnamon soil, and the experimental plot does not have irrigation conditions, and 70% rainfall amount concentrates on summer 7,8, September in 1 year.Soil organic matter content 13.1g/kg, alkali-hydrolyzable nitrogen 30.6mg/kg, rapid available phosphorus 19.7mg/kg, available potassium 152.1mg/kg, pH7.61.The test sweet potato variety is starch-type kind Ji potato 21.
4 processing are established in test, are respectively to handle 1: blank, not fertilizer treatment; Handle 2: conventional fertilizer application, i.e. peasant habit fertilising; Handle 3: the fertilizer contrast, 4 amount of nutrients are identical with handling, and use pure N 4kg, P for every mu
2O
53.2kg and K
2O 8.8kg; Handle 4: sweet potato water conservation dedicated fertilizer 40kg/ mu, concrete formulation by weight is 17.5 parts in a urea, 18.2 parts of monoammonium phosphates, 44.0 parts of vitriolate of tartar, 9.3 parts of ZX-Is, 3.1 parts of SEPIGEL 305s, 7.9 parts of wilkinites.Sub-district area 36m
2, each is handled 4 times and repeats.
Conventional fertilizer application adopts the peasant habit fertilising, executes 15-15-15 composite fertilizer 35kg and vitriolate of tartar 10kg for every mu.Handling 3 used fertilizer is urea, monoammonium phosphate and vitriolate of tartar, and every mu of consumption is respectively 7.0 kilograms, 7.28 kilograms and 17.6 kilograms.All fertilizer are all made base manure, disposablely before ridging spread fertilizer over the fields ridging behind the face of land.Experimental field do not have irrigation conditions, sweet potato is throughout the growing season no longer irrigated after spreading manuer in holes the water transplanting the first tenday period of a month in May.
Table 1 different fertilization is to the influence of Ji potato 21 potato piece output
Table 1 is the result show, the yield of sweet potato of using sweet potato water conservation dedicated fertilizer is the highest, respectively than the raising the output 32.68% of not applying fertilizer, than fertilizer contrast raising the output 16.06%, than peasant conventional fertilizer application raising the output 18.44%.Use the contrast of sweet potato water conservation dedicated fertilizer, fertilizer and not between the fertilizer treatment bright potato volume variance reach level of signification (p＜0.05).Using sweet potato water conservation dedicated fertilizer potato piece goes out to do rate and is higher than 1.22 percentage points of fertilizer contrasts.
Table 2 different fertilization is to the influence of Ji potato 21 potato dry product matter
Can find out from table 2, use the potato dry starch content and the basic indifference of conventional fertilizer application of sweet potato water conservation dedicated fertilizer, be lower than not 3.5～3.6 percentage points of fertilizer treatment and fertilizer control treatment; Crude protein content is compared basic indifference than not fertilizer treatment raising with the fertilizer contrast with conventional fertilizer application; Total sugar content is compared and improved 2.82 and 1.66 percentage points respectively with fertilizer treatment not, fertilizer contrast, and is less with conventional fertilizer application difference.
(2) this sweet potato water conservation dedicated fertilizer is to eating the influence of type Ji potato 22 yield and qualities raw
Pingying County rose town carries out in the Jinan City in test, and the experimental plot is positioned at the middle and southern in Shandong Province hilly area, lacks irrigation conditions, and 70% rainfall amount concentrates on summer 7,8, September in 1 year.Supplying examination soil is cinnamon soil, soil organic matter content 13.9g/kg, and alkali-hydrolyzable nitrogen 42.1mg/kg, rapid available phosphorus 17.3mg/kg, available potassium 170.5mg/kg, pH 7.43.The test sweet potato variety is for eating type kind Ji potato 22 raw.
4 processing are established in test, are respectively to handle 1: blank, not fertilizer treatment; Handle 2: conventional fertilizer application, peasant habit fertilization method; Handle 3: sweet potato water conservation dedicated fertilizer 45kg/ mu, concrete formulation by weight is 21.8 parts in a urea, 18.2 parts of monoammonium phosphates, 40 parts of vitriolate of tartar, 9.0 parts of ZX-Is, 3.0 parts of SEPIGEL 305s, 8.0 parts of boron-moisten soils.Sub-district area 45m
2, each is handled 3 times and repeats.
Conventional fertilizer application adopts the peasant habit fertilization method, uses the composite fertilizer 50kg that nutrient content is 15-15-15 for every mu.Handling 3 used fertilizer is urea, monoammonium phosphate and vitriolate of tartar, and every mu of consumption is respectively 9.8 kilograms, 8.18 kilograms and 18.0 kilograms, and pure nutrient consumption is identical with processing 4.All fertilizer are all made base manure, disposablely before ridging spread fertilizer over the fields ridging behind the face of land.Experimental field do not have irrigation conditions, sweet potato is no longer irrigated up to results after spreading manuer in holes the water transplanting the first tenday period of a month in May.
Table 3 different fertilization is to the influence of Ji potato 22 potato piece output
Table 3 shows, compares with the fertilizer control treatment with fertilizer treatment not, uses the bright potato output of sweet potato water conservation dedicated fertilizer and increases production 43.63% and 37.95% respectively, and difference reaches level of signification (p＜0.05).Different fertilization influences less to the rate that goes out to do of Ji potato 22.
Table 4 different fertilization is to the influence of Ji potato 22 potato dry product matter
Can find out that from table 4 the dried crude protein content of potato of using sweet potato water conservation dedicated fertilizer compares 0.83 percentage point of not fertilizer treatment raising, compares basic indifference with conventional fertilizer application with the fertilizer contrast; Total sugar content ratio not fertilizer treatment improves 4.28 percentage points, a little less than fertilizer contrast and conventional fertilizer application; Starch content is the highest in 4 processing, respectively than fertilizer treatment, conventional fertilizer application and fertilizer contrast do not improve 2.0,3.5 and 1.5 percentage points.
Claims (5)
1. sweet potato water conservation dedicated fertilizer and preparation method thereof is characterized in that raw materials used weight part proportioning is following:
7～12 parts of available nitrogens; 6～9 parts of available phosphoruss; Effectively potassium is 20～25 parts; 8～10 parts of ZX-Is; 2～5 parts of SEPIGEL 305s; 5～9 parts of wilkinites.
2. sweet potato water conservation dedicated fertilizer according to claim 1 and preparation method thereof is characterized in that said available nitrogen is one or more the mixture in granular urea, ammonium sulfate or the coated carbamide.
3. sweet potato water conservation dedicated fertilizer according to claim 1 and preparation method thereof is characterized in that said available phosphorus is one or more the mixture in particulate state phosphoric acid two ammoniums, monoammonium phosphate, double superhosphate or the superphosphate of lime.
4. sweet potato water conservation dedicated fertilizer according to claim 1 and preparation method thereof is characterized in that said effective potassium is one or both the mixture in particulate state vitriolate of tartar or the Repone K.
5. the preparation method of sweet potato water conservation dedicated fertilizer is characterized in that the preparation method is following:
At first take by weighing an amount of boron-moisten soil, add an amount of particulate state SEPIGEL 305, after stirring, add an amount of particulate state ZX-I again, the speed with 60～100 commentaries on classics/min under the normal temperature and pressure stirs, as A group raw material for standby;
Take by weighing suitable quantity of water dissolubility available nitrogen, available phosphorus and effective k particle shape fertilizer, join in the disc type feeding machine, the speed with 60～200 commentaries on classics/min stirs at normal temperatures and pressures, as B group raw material for standby;
A group raw material with preparation joins in the B group raw material of disc type feeding machine then, and the speed with 60～90 commentaries on classics/min stirs at normal temperatures and pressures, and metering is packaged as finished product at last.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102898234A (en) * | 2012-10-15 | 2013-01-30 | 中国科学院合肥物质科学研究院 | Slow release urea and preparation method thereof |
| CN102976868A (en) * | 2012-12-28 | 2013-03-20 | 高宗和 | Water-retaining and soil-fertilizing synergist |
| CN103408357A (en) * | 2013-07-18 | 2013-11-27 | 江苏徐淮地区徐州农业科学研究所 | Compound fertilizer special for sweet potatoes and preparation method thereof |
| CN103772074A (en) * | 2013-12-26 | 2014-05-07 | 青岛农业大学 | Long-acting fertilizer specially used for dry-farming sweet potatoes and preparation method for long-acting fertilizer |
| CN103787722A (en) * | 2014-02-14 | 2014-05-14 | 徐州市农业科学院 | Sweet potato water culture nutrient solution formula for winter greenhouse stem tip vegetables and usage method thereof, |
| CN105503447A (en) * | 2016-02-01 | 2016-04-20 | 福建省农业科学院土壤肥料研究所 | Inorganic special vegetable fertilizer with functions of moisture and fertilizer retention and soil reinforcement |
| CN105503448A (en) * | 2016-02-01 | 2016-04-20 | 福建省农业科学院土壤肥料研究所 | Inorganic special fertilizer for forage with functions of moisture and fertilizer retention and soil reinforcement |
| CN105601434A (en) * | 2016-02-01 | 2016-05-25 | 福建省农业科学院土壤肥料研究所 | Special organic/inorganic compound fertilizer for pasture with water/fertilizer retention and soil fixation functions |
| CN105694899A (en) * | 2016-01-22 | 2016-06-22 | 和县正林苗木专业合作社 | Sandy oil treating agent for root burying and seed preservation of Chinese scholartree |
| CN107827523A (en) * | 2017-11-29 | 2018-03-23 | 江苏省农业科学院 | A kind of special fertilizer for sweet potato with slow release effect |
| CN107986865A (en) * | 2017-12-10 | 2018-05-04 | 长沙无道工业设计有限公司 | A kind of soil amendment fertilizer and preparation method thereof |
| CN108794143A (en) * | 2018-04-24 | 2018-11-13 | 百色学院 | A kind of soil conditioner and preparation method thereof |
| CN112723942A (en) * | 2021-01-04 | 2021-04-30 | 中国科学院沈阳应用生态研究所 | Slow-release fertilizer with water retention and root protection functions and preparation method thereof |
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| CN101215209A (en) * | 2007-12-29 | 2008-07-09 | 孙景明 | Water-retention composite mixed fertilizer and preparation method thereof |
| CN101381261A (en) * | 2008-01-06 | 2009-03-11 | 吴行国 | Special fertilizer for sweet potato |
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| CN102898234A (en) * | 2012-10-15 | 2013-01-30 | 中国科学院合肥物质科学研究院 | Slow release urea and preparation method thereof |
| CN102976868A (en) * | 2012-12-28 | 2013-03-20 | 高宗和 | Water-retaining and soil-fertilizing synergist |
| CN103408357A (en) * | 2013-07-18 | 2013-11-27 | 江苏徐淮地区徐州农业科学研究所 | Compound fertilizer special for sweet potatoes and preparation method thereof |
| CN103408357B (en) * | 2013-07-18 | 2015-07-22 | 江苏徐淮地区徐州农业科学研究所 | Compound fertilizer special for sweet potatoes and preparation method thereof |
| CN103772074A (en) * | 2013-12-26 | 2014-05-07 | 青岛农业大学 | Long-acting fertilizer specially used for dry-farming sweet potatoes and preparation method for long-acting fertilizer |
| CN103772074B (en) * | 2013-12-26 | 2015-08-19 | 青岛农业大学 | A kind of long-acting dry farming special fertilizer for sweet potato and preparation method thereof |
| CN103787722A (en) * | 2014-02-14 | 2014-05-14 | 徐州市农业科学院 | Sweet potato water culture nutrient solution formula for winter greenhouse stem tip vegetables and usage method thereof, |
| CN103787722B (en) * | 2014-02-14 | 2015-08-12 | 徐州市农业科学院 | Winter booth stem apex dish sweet potato Nourishing Formulations for Water Cultivation and using method thereof |
| CN105694899A (en) * | 2016-01-22 | 2016-06-22 | 和县正林苗木专业合作社 | Sandy oil treating agent for root burying and seed preservation of Chinese scholartree |
| CN105503447A (en) * | 2016-02-01 | 2016-04-20 | 福建省农业科学院土壤肥料研究所 | Inorganic special vegetable fertilizer with functions of moisture and fertilizer retention and soil reinforcement |
| CN105601434A (en) * | 2016-02-01 | 2016-05-25 | 福建省农业科学院土壤肥料研究所 | Special organic/inorganic compound fertilizer for pasture with water/fertilizer retention and soil fixation functions |
| CN105503448A (en) * | 2016-02-01 | 2016-04-20 | 福建省农业科学院土壤肥料研究所 | Inorganic special fertilizer for forage with functions of moisture and fertilizer retention and soil reinforcement |
| CN107827523A (en) * | 2017-11-29 | 2018-03-23 | 江苏省农业科学院 | A kind of special fertilizer for sweet potato with slow release effect |
| CN107986865A (en) * | 2017-12-10 | 2018-05-04 | 长沙无道工业设计有限公司 | A kind of soil amendment fertilizer and preparation method thereof |
| CN108794143A (en) * | 2018-04-24 | 2018-11-13 | 百色学院 | A kind of soil conditioner and preparation method thereof |
| CN112723942A (en) * | 2021-01-04 | 2021-04-30 | 中国科学院沈阳应用生态研究所 | Slow-release fertilizer with water retention and root protection functions and preparation method thereof |
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Application publication date: 20120926 |