WO2006131056A1 - Procédé de fertilisation pour une irrigation agricole - Google Patents

Procédé de fertilisation pour une irrigation agricole Download PDF

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Publication number
WO2006131056A1
WO2006131056A1 PCT/CN2006/001167 CN2006001167W WO2006131056A1 WO 2006131056 A1 WO2006131056 A1 WO 2006131056A1 CN 2006001167 W CN2006001167 W CN 2006001167W WO 2006131056 A1 WO2006131056 A1 WO 2006131056A1
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WO
WIPO (PCT)
Prior art keywords
fertilizer
water
activator
phosphate
acid
Prior art date
Application number
PCT/CN2006/001167
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English (en)
Chinese (zh)
Inventor
Diping Li
Xiucheng Xu
Haobin Wang
Dongguang Li
Original Assignee
Higheffi Tech.Ltd.Corp.Beijing
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Higheffi Tech.Ltd.Corp.Beijing filed Critical Higheffi Tech.Ltd.Corp.Beijing
Publication of WO2006131056A1 publication Critical patent/WO2006131056A1/fr
Priority to IL187811A priority Critical patent/IL187811A/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
    • A01C23/04—Distributing under pressure; Distributing mud; Adaptation of watering systems for fertilising-liquids
    • A01C23/042—Adding fertiliser to watering systems
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/20—Liquid fertilisers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Definitions

  • the present invention relates to an agricultural production technique, and more particularly to an agricultural irrigation and fertilization method.
  • the fertigation methods used in various countries and regions of the world require the use of appropriate liquid or fully water-soluble solid fertilizers.
  • the nitrogen and potassium fertilizers currently used in agriculture are mainly water-soluble, and the fertilization method is applied. It should be simple and easy to implement, and there are no serious problems.
  • Phosphate fertilizers such as industrial grade, food grade ammonium phosphate, potassium dihydrogen phosphate, etc., are also fully water soluble, so it should be feasible to use fertigation methods.
  • most of the phosphate fertilizers currently used in agriculture are partially water-soluble or water-insoluble, and it is difficult to use fertigation methods to implement fertigation of crops.
  • Some fertilizers containing medium and trace elements are also water-insoluble.
  • the object of the present invention is to develop an agricultural fertigation method, which can not only continuously provide phosphorus for crops, but also fully defluorinate the fertilizer effect of the water-insoluble phosphate fertilizer, improve the utilization rate of the fertilizer, and provide various medium and trace elements. And enhance the ability of crops to resist viruses and lodging.
  • fertigation refers to an irrigation method that uses a fully water-soluble solid or liquid fertilizer to provide the required nutrients to crops through a micro-irrigation system, which can be used together with irrigation water. Enter the field to increase the yield of irrigated crops with the least amount of nutrients.
  • the above-mentioned irrigation and fertilization, using an irrigation system can achieve high precision in terms of fertilization amount, fertilization time and fertilization space, and is a combination of precise fertilization and precise irrigation.
  • the method of the present invention mainly uses water-insoluble phosphate fertilizer granules and water-insoluble fertilizers or mineral granules containing medium and micro-elements as raw materials.
  • the water-insoluble phosphate fertilizer refers to the solubility of the phosphate fertilizer in the water at room temperature and atmospheric pressure is less than or equal to
  • the water-insoluble medium and trace element fertilizer or mineral means that the solubility of the fertilizer or mineral containing the medium or trace element in water at room temperature and atmospheric pressure is less than or equal to 100 mg/kg, preferably less than or equal to 50 mg/kg, more preferably less than or equal to 20 mg/kg.
  • the water-insoluble phosphate fertilizer particles are selected from the group consisting of phosphate rock powder, acid phosphate fertilizer and hot phosphate fertilizer.
  • the phosphate rock powder is a phosphate fertilizer directly pulverized from phosphate rock.
  • the phosphorus-containing compound in phosphate rock is mainly composed of fluoroapatite.
  • Phosphate rock powder is a poorly soluble phosphate fertilizer containing 8% of total phosphorus. Under the ⁇ soluble phosphorus, the fertilizer is slow and long lasting.
  • the acid phosphate fertilizer is obtained by treating phosphate rock powder with an acid such as sulfuric acid, nitric acid or hydrochloric acid. Precipitated calcium phosphate is included in the acid phosphate fertilizer.
  • the precipitated calcium phosphate can be obtained by reacting phosphate rock with sulfuric acid, nitric acid, hydrochloric acid or the like to form phosphoric acid, and then precipitating with lime milk.
  • the hot phosphate fertilizer is a high-temperature decomposing phosphate ore produced by burning electric power or fuel
  • the prepared phosphate fertilizer mainly includes defluorinated phosphate fertilizer, sintered calcium nano-phosphorus fertilizer, calcium metaphosphate, steel slag phosphate fertilizer, calcium magnesium phosphate fertilizer.
  • Defluorinated phosphate fertilizer is made by reacting fluoroapatite with water vapor at high temperature (1500 ° C). The response is as follows:
  • the phosphorus content of defluorinated phosphate fertilizer (P 2 0 5 ) is about 19-38%, which belongs to the ⁇ soluble phosphate fertilizer.
  • Sintered calcium, sodium and phosphate fertilizers are formed by sintering phosphate rock with sodium carbonate and silica sand at high temperature (1250 ° C). The product contains P 2 0 5 28-30%.
  • Calcium metaphosphate is prepared by contacting phosphate rock powder with P 2 0 5 gas at 950 ° C. The reaction is as follows:
  • Metaphosphate glassy yellow crystals, phosphorus (? 205) of up to 60% -70%, may be soluble in neutral ammonium citrate solution.
  • Steel slag phosphate fertilizer is a by-product of the steelmaking industry. It is dark brown powder and strongly alkaline.
  • the form of phosphorus is tetracalcium phosphate (Ca 4 P 2 0 9 ) and double salt of calcium silicate and calcium silicate (Ca 4 P 2 0 9 -CaSi0 3 ), both are soluble in citric acid and ammonium citrate solutions.
  • Calcium, magnesium and phosphate fertilizers are based on phosphate rock, flux (serpentine, olivine, etc.) and fuel (anthracite, coke, etc.) and heated to 1450.
  • the product obtained by drying and grinding is usually dark gray, grayish green or dark green powder, and has good physical properties. Non-hygroscopic, non-caking, alkaline reaction, but not corrosive. It is a glass body composed mainly of phosphorus, silicon, calcium and magnesium. It has no clear molecular formula and molecular weight.
  • the product contains P 2 0 5 14-18% and is soluble in 2% citric acid.
  • Calcium magnesium phosphate fertilizer also contains MgO 8-20%, CaO 25-40%, Si0 2 22-32%, FeO 0.5-3% and the like.
  • the medium trace elements are calcium, magnesium, sulfur, boron, molybdenum, zinc, manganese, iron, copper and nickel, as well as beneficial element silicon and the like.
  • Calcium is a structural component of the cell wall, which has a certain effect on the synthesis of proteins, and is also a cofactor for some enzymatic reactions, and has a special effect on regulating the physiological balance of the medium. Therefore, when the crop is deficient in calcium, the plant is short and the root system is poorly developed. The cell wall is deficient in calcium, easily invaded by viruses, and will rot and die in severe cases;
  • Magnesium is a constituent element of chlorophyll, an activator of many enzymes, and promotes the synthesis of fat as well as the metabolism of nitrogen.
  • the reticular tissue of the leaves is yellow or white, and even becomes brown or even necrotic.
  • Magnesium-deficient pasture can cause convulsions in livestock.
  • Sulfur is a constituent of proteins and enzymes and is also found in certain physiologically active substances and is an integral part of the nitrogenase system. When the crop is deficient in sulfur, the growth is severely impeded and the leaves are chlorotic or yellow.
  • silicon is not an essential nutrient for crops, the lack of silicon in crops is prone to lodging and viruses invade surface cells. Therefore, silicon is an important beneficial element for many crops, especially silicon-rich rice, sugar cane, and bamboo.
  • Trace elements are often part of enzymes or coenzymes in plants and have strong specificity. They are indispensable and irreplaceable for crop growth and development.
  • the fertilizer used in the present invention is accompanied by a medium or trace element, or is additionally formulated with water.
  • a soluble fertilizer or mineral containing trace elements is additionally formulated with water.
  • the water-insoluble medium or trace element-containing fertilizer or mineral is one or more fertilizers or minerals selected from the group consisting of water-insoluble calcium, magnesium, sulfur, boron, molybdenum, zinc, manganese, iron or copper.
  • the water-insoluble calcium fertilizer or mineral is, for example, calcium sulfate, phosphogypsum, industrial waste, such as steel industry slag.
  • the water-insoluble magnesium fertilizer or mineral is, for example, magnesite, dolomite.
  • the water-insoluble sulfur fertilizer or mineral is, for example, calcium sulfate, zinc sulfide ore, pyrite, phosphogypsum, sulfur.
  • the water-insoluble boron fertilizer or mineral is, for example, a boron magnesium ore, a boron mud.
  • the water-insoluble molybdenum fertilizer or mineral is, for example, molybdenum slag.
  • the water-insoluble zinc fertilizer or mineral is, for example, zinc oxide or zinc sulfide.
  • the water-insoluble manganese fertilizer or mineral is, for example, manganese oxide or manganese-containing slag.
  • the water-insoluble iron fertilizer or mineral is, for example, ferrous oxide or pyrite.
  • the water-insoluble copper fertilizer or mineral is, for example, copper oxide or copper slag.
  • the phosphate fertilizer and the fertilizer or mineral containing the medium and trace elements are dissolved in water very low.
  • the solubility and dissolution rate of the water-insoluble phosphate fertilizer and the fertilizer or mineral containing the medium and trace elements are appropriately increased, so that an activator is added during the fertigation process.
  • an activator is understood to be a compound which destroys the structure of a water-insoluble phosphate fertilizer and a non-water-soluble micronutrient fertilizer or mineral, thereby releasing nutrients in the water-insoluble fertilizer.
  • the activator is one or more compounds selected from the group consisting of inorganic acids, organic acids, inorganic salts and amide nitrogen fertilizers.
  • the action mechanism of the activator and the water-insoluble phosphate fertilizer and the water-insoluble medium-and-micro element fertilizer or mineral is that the ion exchange reaction between the hydrogen ion or the alkali metal element ion and the phosphate ion and the medium trace element ion is performed. Released into irrigation water.
  • the inorganic acid is one or more inorganic acids selected from the group consisting of hydrochloric acid, nitric acid and sulfuric acid.
  • the organic acid is one or more organic acids selected from the group consisting of oxalic acid, citric acid, formic acid and benzoic acid.
  • the inorganic salt is one or more inorganic salts selected from the group consisting of sodium hydrogen sulfate, potassium hydrogen sulfate, ammonium nitrate, magnesium sulfate, potassium sulfate, ammonium sulfate, ammonium chloride, potassium chloride and potassium nitrate.
  • the amide nitrogen fertilizer is urea.
  • the invention relates to a method for agricultural fertigation. This method is characterized in that it comprises the following steps:
  • the water-insoluble acid phosphate fertilizer is precipitated calcium phosphate.
  • the water-insoluble hot phosphate fertilizer is selected from the group consisting of defluorinated phosphate fertilizer, sintered calcium sodium phosphate fertilizer, calcium metaphosphate, steel slag phosphate fertilizer, calcium magnesium phosphate fertilizer.
  • the water-insoluble medium trace element fertilizer or mineral particles are one or more fertilizers or minerals selected from the group consisting of water-insoluble calcium, magnesium, sulfur, boron, molybdenum, zinc, manganese, iron or copper.
  • the calcium is, for example, calcium sulfate, phosphogypsum, industrial waste, such as steel industry slag;
  • the magnesium is, for example, magnesite, dolomite;
  • the sulfur is, for example, calcium sulfate, zinc sulfide ore, pyrite Phosphogypsum, sulfur;
  • the boron is, for example, boraxite or boron mud;
  • the molybdenum is, for example, molybdenum slag;
  • the zinc is, for example, zinc oxide or zinc sulfide;
  • the manganese is, for example, manganese oxide, The manganese slag;
  • the iron is, for example, ferrous oxide or pyrit
  • the particle size of the phosphate rock, phosphate fertilizer, medium or trace element fertilizer or mineral is 0.5-3 mils, preferably 0.7-1.5 mils; more preferably 0.8-1.0 mils. If the particle size is less than 0.5 mils, the bed resistance is too large and the power consumption is large; if the particle size is larger than 3 mils, a longer contact time is required, and the leaching efficiency is lower.
  • the mixing ratio of the water-insoluble phosphate fertilizer particles to the medium-trace element fertilizer or mineral particles is 100: 0-2; preferably 100: 0-1; more preferably 100: 0-0.3;
  • An activator aqueous solution is prepared by dissolving one or more activators selected from the group consisting of inorganic acids, organic acids, inorganic salts and amide nitrogen fertilizers in water.
  • the inorganic acid is one or more inorganic acids selected from the group consisting of hydrochloric acid, nitric acid and sulfuric acid.
  • the organic acid is one or more organic acids selected from the group consisting of oxalic acid, citric acid, formic acid or benzoic acid.
  • the inorganic salt is one or more inorganic salts selected from the group consisting of sodium hydrogen sulfate, potassium hydrogen sulfate, ammonium nitrate, magnesium sulfate, potassium sulfate, ammonium sulfate, ammonium chloride, potassium chloride or potassium nitrate.
  • the amide gas fertilizer is urea.
  • the aqueous solution of the activator has a mass concentration of 5 to 30%; preferably 5-15%; more preferably 8 to 12%.
  • the mass concentration of the aqueous solution of the activator is higher than 30%, some of the inorganic salts are incompletely dissolved, less than 5%, and the volume of the activator tank is too large.
  • the mixing ratio of the aqueous solution of the activator to water is from 1:1000 to 1:100, preferably from 1:500 to 1:100; more preferably 1:200.
  • the concentration of the activator is too dilute to reduce the solubility of the water-insoluble particles; less than 1:100, the activator is too concentrated, for the water-insoluble particles Dissolution is too fast, which may cause the irrigation water to repeat the precipitation and block the water pipeline.
  • the linear velocity of the diluted activator solution through the fixed bed of fertilizer granules is 0.1-5 cm/sec; preferably 0.5-2 cm/sec; more preferably 0.8-1.2 cm/sec.
  • the contact time is too short, and the fixed bed is required to be high and soluble.
  • the output is too small. If the line speed is less than 0.1 cm/sec, the fixed bed container is too large, the equipment investment is high, and the efficiency is low.
  • the mass concentration to the irrigation water is P 2 0 5 1 by selecting the water-insoluble fertilizer, the type of activator, controlling the mixing ratio of the aqueous solution of the activator and water, and the linear velocity of the diluted activator solution.
  • P 2 0 5 1 by selecting the water-insoluble fertilizer, the type of activator, controlling the mixing ratio of the aqueous solution of the activator and water, and the linear velocity of the diluted activator solution.
  • Such selection methods will be described in detail in the section of the description of the specification.
  • the container used in the practice of the present invention may be any apparatus capable of filling the phosphate fertilizer and containing medium or micro-element fertilizer or mineral particles to form a fixed bed.
  • a device may for example be a container selected from the group consisting of tanks, tanks, columns and columns.
  • the sections of the troughs, tanks, columns and columns may be of any shape, such as round, square, rectangular, polygonal, elliptical.
  • the invention may be practiced using pulsating beds, fluidized beds, and the like, which are known to those skilled in the art.
  • the invention is practiced with a fixed bed and a pulsating bed, more preferably a fixed bed.
  • This example first selects a water-insoluble phosphate rock.
  • the phosphate rock powder is sieved to obtain phosphorus having a diameter of about 2 mm and containing P 2 0 5 20%, CaO 28%, MgO 6%, SiO 2 20%, Fe0 1%, MnO 0.2% by mass of the phosphate rock particles.
  • the ore particles weigh 500kg of this phosphate rock particles and 0.25kg of zinc oxide, 0.25kg of boron-magnesium ore, and mix them evenly into a cylindrical reactor with an effective volume of 0.5m 3 to form a fixed bed of fertilizer. Fixed bed.
  • an activator solution was prepared. Weigh 20kg ammonium sulfate, 5kg 36% hydrochloric acid, 3.5kg potassium sulfate, 5kg magnesium sulfate in 300kg of water under stirring at room temperature, thus obtaining an aqueous solution of activator, and filling the prepared activator solution into the storage tank. use.
  • the diluted activator solution is passed through the fertilizer fixed bed to obtain an irrigation water containing P 2 0 5 20 mg/kg, CaO 26 mg/kg, MgO 13 mg/kg, Si0 2 by mass. 3 mg/kg, Fe0 2 mg/kg, B 2 0 3 lmg/kg, Zn 3 mg/kg, Mn 1 mg/kg, N 70 mg/kg, S 90 mg/kg and K 2 0 29 mg/kg.
  • the raw materials were weighed in the following proportions to prepare an activator solution: 5 kg of magnesium sulfate, 20 kg of potassium nitrate, 5 kg of urea, and 100 kg of water. This activator was charged into a storage tank having an effective volume of 0.3 m 3 .
  • the irrigation water introduced from the irrigation system at a flow rate of 10 m 3 /h is added to the activator solution in a ratio of 1000:1 to obtain a diluted activator solution, and the diluted activator solution is passed through the fixed bed. Obtained an irrigation water containing P 2 0 5 50 mg/kg, N 50 mg/kg, K 2 0 90 mg/kg, CaO 100 mg/kg, MgO 36 mg/kg, Si0 2 by mass 60 mg/kg, FeO 5 mg/kg, B 2 0 3 5 mg/kg.
  • Select steel slag phosphate with a particle diameter of about 1.5 mm which contains P 2 0 5 18 %, CaO 40%, MgO 3%, Si0 2 5%, FeO 10%, MnO 3%, and weigh 100 Kg.
  • the steel slag phosphate fertilizer is added to a reactor having an effective volume of 0.2 m 3 to form a fixed bed.
  • the raw materials were weighed in the following proportions to prepare an activator solution: 5 kg of potassium nitrate, 5 kg of 98% sulfuric acid, 25 kg of ammonium chloride, and 200 kg of water.
  • the activator is loaded into an effective volume of 0.3 m 3 In the tank.
  • the irrigation water with a flow rate of 10 m 3 /h is added to the activator solution in a ratio of 300:1 to obtain a diluted activator solution, and the diluted activator solution is passed through the above fixed bed.
  • the nutrient content of the irrigation water produced by the fertigation method of the present invention can be varied within a large range to accommodate this change.
  • the fertigation method of the invention can save the fertilizer amount by 30-60% compared with the traditional fertilization method, and the fertilizer utilization rate can reach 70-90%, which is a modern agricultural method for water and fertilizer utilization. In addition, it is also conducive to the realization of agricultural industrialization.

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  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Fertilizers (AREA)

Abstract

Le procédé de fertilisation pour une irrigation agricole selon l’invention comprend une étape consistant à faire passer une solution aqueuse d’agents d'activation à travers un lit fixe de fertilisant composé d’un fertilisant phosphaté granulaire non aqueux et un milieu contenant un fertilisant ou un minéral ou un oligo-élément pour atteindre l'eau d'irrigation de façon à d’irriguer les plantes. Avec le procédé de la présente invention, la consommation de fertilisant peut être de 30 à 60 % inférieure à celle du procédé de fertilisation classique, et de ce fait le rapport d'utilisation du fertilisant vaut jusqu'à une valeur de 70 à 90 %.
PCT/CN2006/001167 2005-06-09 2006-05-31 Procédé de fertilisation pour une irrigation agricole WO2006131056A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IL187811A IL187811A (en) 2005-06-09 2007-12-02 Fertilization method for agricultural irrigation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB200510075256XA CN100407898C (zh) 2005-06-09 2005-06-09 一种农业灌溉施肥方法
CN200510075256.X 2005-06-09

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Publication Number Publication Date
WO2006131056A1 true WO2006131056A1 (fr) 2006-12-14

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CN (1) CN100407898C (fr)
IL (1) IL187811A (fr)
WO (1) WO2006131056A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110988270A (zh) * 2019-12-24 2020-04-10 南通中智检测服务有限公司 固态非水溶性肥料中的速效金属含量测定方法

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* Cited by examiner, † Cited by third party
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EP2991955B1 (fr) 2013-04-30 2019-04-17 Saudi Basic Industries Corporation Composition de fertigation et procédé de fertigation
CN103636416B (zh) * 2013-12-02 2015-08-26 昆明理工大学 MgCl2在促进植物硝态氮吸收中的应用
CN110799475B (zh) 2017-05-17 2023-02-21 沙特基础工业全球技术公司 抗结块肥料组合物
CN116376556B (zh) * 2023-04-04 2023-11-28 中国科学院南京土壤研究所 一种用于控酸降镉的纳米微碱灌溉水及灌溉水稻的方法

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CN1298850A (zh) * 1999-12-07 2001-06-13 新疆农垦科学院农业新技术推广服务中心 喷滴灌用肥及其生产方法
US6632262B2 (en) * 2000-08-22 2003-10-14 Georgia-Pacific Resins, Inc. Controlled release urea-formaldehyde liquid fertilizer resins
CN1607198A (zh) * 2003-10-15 2005-04-20 石河子市高新农业科学技术服务中心 喷滴灌专用液肥及其生产方法
CN1609072A (zh) * 2004-11-08 2005-04-27 陕西巨川富万钾股份有限公司 一种节水灌溉专用液体肥料及其制备方法

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CN1249288A (zh) * 1999-07-14 2000-04-05 朱晓鸣 有机、无机多元复合液肥
CN1298850A (zh) * 1999-12-07 2001-06-13 新疆农垦科学院农业新技术推广服务中心 喷滴灌用肥及其生产方法
US6632262B2 (en) * 2000-08-22 2003-10-14 Georgia-Pacific Resins, Inc. Controlled release urea-formaldehyde liquid fertilizer resins
CN1607198A (zh) * 2003-10-15 2005-04-20 石河子市高新农业科学技术服务中心 喷滴灌专用液肥及其生产方法
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CN110988270A (zh) * 2019-12-24 2020-04-10 南通中智检测服务有限公司 固态非水溶性肥料中的速效金属含量测定方法

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IL187811A (en) 2012-02-29
CN1875688A (zh) 2006-12-13
IL187811A0 (en) 2008-08-07

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