JP2000327469A - Production of liquid organic fertilizer - Google Patents

Production of liquid organic fertilizer

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Publication number
JP2000327469A
JP2000327469A JP11136877A JP13687799A JP2000327469A JP 2000327469 A JP2000327469 A JP 2000327469A JP 11136877 A JP11136877 A JP 11136877A JP 13687799 A JP13687799 A JP 13687799A JP 2000327469 A JP2000327469 A JP 2000327469A
Authority
JP
Japan
Prior art keywords
organic fertilizer
liquid organic
fertilizer
liquid
potassium
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP11136877A
Other languages
Japanese (ja)
Inventor
寶村 ▲黄▼
Hoson Ko
Eishun Kaku
永春 郭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TAIWAN TOGYO KOFUN YUGENKOSHI
Original Assignee
TAIWAN TOGYO KOFUN YUGENKOSHI
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 TAIWAN TOGYO KOFUN YUGENKOSHI filed Critical TAIWAN TOGYO KOFUN YUGENKOSHI
Priority to JP11136877A priority Critical patent/JP2000327469A/en
Publication of JP2000327469A publication Critical patent/JP2000327469A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses

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  • Fertilizers (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a process for producing a liquid organic fertilizer which makes it possible to obtain soil which can be preserved for a long period of time and does not require the restoration of fertility. SOLUTION: Alcohol lees 7 are recovered as the basic raw materials for the liquid organic fertilizer. The alcohol lees 7 are concentrated to 3.5 times the original concentration, by which a lees concentrate 8 is obtained. While the alcohol lees 7 contain a large amount of carbon organic materials and a trace amount of many other elements, the per cent of their nitrogen compound, phosphorus compound and potassium compound is too low in order for the direct use thereof as the liquid fertilizer and, therefore, the lees concentrate are mixed at a ratio of 4:1 with the additive raw materials 9 including nitrogen, phosphorus and potassium. The additive raw materials 9 contain lysine. The lysine stabilizes the liquid organic fertilizer. As a result, the liquid organic fertilizer has the resisting force to temperature and pressure. Consequently, the contents of the liquid organic fertilizer do not induce a chemical change and allow the long-term preservation when the liquid organic fertilizer is packaged or transported.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は液体有機肥料の製造
方法、特にアルコール滓を使用して製造する液体有機肥
料の製造方法に関する。[0001] The present invention relates to a method for producing a liquid organic fertilizer, and more particularly to a method for producing a liquid organic fertilizer using alcohol slag.

【０００２】[0002]

【従来の技術】特公昭５３−４４３６７号には、発酵さ
せた糖蜜の蒸留液または濃縮残留物からなる原料から製
造した液体肥料が開示されている。濃縮液体肥料は高濃
度液体の形態で存在するため、同濃縮液体肥料は固体有
機肥料より体積が更に小さく、かつ固体有機肥料より貯
蔵及び保存がより容易である。更に、液体肥料は使用時
に水と混合することができるため、液体肥料は固体有機
肥料より使いやすく、徐々に受け入れられている。2. Description of the Related Art JP-B-53-44367 discloses a liquid fertilizer produced from a raw material comprising a distillate or a concentrated residue of fermented molasses. Because the concentrated liquid fertilizer exists in the form of a highly concentrated liquid, the concentrated liquid fertilizer is smaller in volume than the solid organic fertilizer and is easier to store and store than the solid organic fertilizer. In addition, liquid fertilizers are easier to use than solid organic fertilizers because they can be mixed with water at the time of use and are increasingly accepted.

【０００３】[0003]

【発明が解決しようとする課題】上述の液体有機肥料は
貯蔵のために常にプラスチック容器内に収容されてい
る。液体有機肥料は温度に敏感であるため、液体有機肥
料は簡単に膨張及び収縮し、これよって、包装材料及び
液体有機肥料の含有物に化学変化を起こす。この結果、
長期保存は不可能である。更に、固体有機肥料は殆どの
農場で慣例的に更に好まれている。しかし、固体有機肥
料の長期使用は土地の肥沃度を損失させ、土壌内での特
定物質の蓄積を招来する。従って、休耕するか、または
作物を時々転作することによって、固体肥料を多用した
土壌は肥沃度を常に回復させる必要がある。そこで、本
発明は長期保存が可能で、肥沃度を回復させる必要がな
い土壌を得ることができる液体有機肥料の製造方法を提
供する。The above-mentioned liquid organic fertilizers are always contained in plastic containers for storage. Because liquid organic fertilizers are temperature sensitive, liquid organic fertilizers easily expand and contract, thereby causing chemical changes in the packaging material and the contents of the liquid organic fertilizer. As a result,
Long-term storage is not possible. Furthermore, solid organic fertilizers are customarily more preferred on most farms. However, long-term use of solid organic fertilizers reduces land fertility and leads to the accumulation of certain substances in the soil. Therefore, solid fertilizer-rich soils need to be constantly regained fertility by fallowing or occasional crop rotation. Therefore, the present invention provides a method for producing a liquid organic fertilizer that can be stored for a long time and can obtain soil that does not need to restore fertility.

【０００４】[0004]

【課題を解決するための手段】本発明の有機肥料の製造
方法によると、窒素（Ｎ）、リン（Ｐ）、カリウム
（Ｋ）及び特殊添加物をアルコール滓へ混合することに
よって、アルコール滓から得られた液体有機肥料の含有
物は温度及び輸送に付随する要因の影響を受けなくな
る。したがって、長期の保存が可能である。更に、本発
明の液体有機肥料は固体堆肥との併用が可能である。所
定の割合で混合された液体有機肥料及び固体堆肥の混合
物から得られた有機化合物肥料は土壌の肥沃度を回復
し、かつ土質を改善することができる。According to the method for producing an organic fertilizer of the present invention, nitrogen (N), phosphorus (P), potassium (K) and special additives are mixed with alcohol slag to remove alcohol slag. The resulting liquid organic fertilizer content is insensitive to temperature and transport-related factors. Therefore, long-term storage is possible. Furthermore, the liquid organic fertilizer of the present invention can be used in combination with solid compost. An organic compound fertilizer obtained from a mixture of a liquid organic fertilizer and a solid compost mixed in a predetermined ratio can restore soil fertility and improve soil quality.

【０００５】[0005]

【発明の実施の形態】本発明の実施の形態を図面に基づ
いて詳細に説明する。ショ糖生産プロセスのフローチャ
ートである図１では、汁液２及びバガス３を得るために
サトウキビ１を圧縮する。バガス３は４０パーセントの
水と、他の固体有機物（炭素、窒素及びリンなどを含
む）とからなる。主産物であるショ糖４及び結晶化不能
な糖蜜５を得るために、汁液２を結晶化処理プロセスで
処理する。糖蜜５は５０パーセントの砂糖及び微量のカ
リウム、カルシウム、マグネシウム及び他の元素を含
む。イースト発酵プロセスを終えた糖蜜５はアルコール
６及び副産物としてのアルコール滓７を生じる。下記の
表１に示すように、アルコール滓７は１０〜１５％の可
溶性物質、約３５％の有機物質、６％の酸化カリウム
（Ｋ2Ｏ）、１．５％の酸化マグネシウム（ＭｇＯ）、
１．０％の酸化カルシウム、５０％の水及び微量の他の
元素からなる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1 which is a flowchart of the sucrose production process, the sugarcane 1 is compressed to obtain the juice 2 and the bagasse 3. Bagasse 3 consists of 40% water and other solid organics (including carbon, nitrogen and phosphorus, etc.). The juice 2 is subjected to a crystallization process in order to obtain the main products sucrose 4 and non-crystallizable molasses 5. Molasses 5 contains 50 percent sugar and trace amounts of potassium, calcium, magnesium and other elements. Molasses 5 that has completed the yeast fermentation process produces alcohol 6 and alcohol slag 7 as a by-product. As shown in Table 1 below, the alcohol slag 7 10-15% of the soluble material, about 35% of organic substances, potassium oxide of 6% (K 2 O), 1.5% of magnesium oxide (MgO),
Consists of 1.0% calcium oxide, 50% water and traces of other elements.

【０００６】[0006]

【表１】 [Table 1]

【０００７】タイワンシュガーカンパニーリミテッドを
例にとると、バガス及びアルコール滓の年間生産量はそ
れぞれ１００万トン及び１１０，０００トンを越す。Taking the example of Taiwan Sugar Company Limited, the annual production of bagasse and alcohol slag exceeds 1 million tons and 110,000 tons, respectively.

【０００８】上記の表に示すように、１１０，０００ト
ンのアルコール滓７は高濃度の有機物質（１０，０００
Ｍｓ／Ｌを越すＢＯＤ）及び大量の無機物質を含む。ア
ルコール滓７の従来の処理はＢＯＤを１５０ｐｐｍまで
減少させる活性汚泥法と、排水基準に適合させるべく黒
色顔料及びＣＯＤを除去した後の排出とからなる。しか
し、この排水処理法は処理設備の設置及び広い土地を要
するため、同排水処理法は高いコストで行われる。更
に、処理後、大量のアルコール滓の排出は環境へのある
程度の害及び汚染を依然として生じる。[0008] As shown in the above table, 110,000 tons of alcohol slag 7 can contain a high concentration of organic substances (10,000).
BOD above Ms / L) and large amounts of inorganic substances. Conventional treatment of alcohol slag 7 consists of an activated sludge process to reduce the BOD to 150 ppm and discharge after removal of black pigment and COD to meet wastewater standards. However, since this wastewater treatment method requires installation of treatment facilities and large land, the wastewater treatment method is performed at high cost. Furthermore, after treatment, the discharge of large quantities of alcohol slag still causes some harm and pollution to the environment.

【０００９】本発明の液体有機肥料製造プロセスを示す
図２では、図１において形成された排水（アルコール滓
７）は液体有機肥料の基本原料として使用すべく回収さ
れる。次いで、アルコール滓７はオリジナル濃度の３．
５倍へ更に濃縮され、滓濃縮物８が得られる。上記の表
に示すように、アルコール滓７は大量の炭素有機物質及
び微量の多数の他の元素を含むが、窒素化合物、リン化
合物及びカリウム化合物の百分率は液体肥料として直接
使用するためには低すぎる。従って、滓濃縮物は窒素
（Ｎ）、リン（Ｐ）及びカリウム（Ｋ）を含む添加原料
９と４：１の割合（滓濃縮物が４に対して、添加原料が
１の割合）で更に混合する必要がある。添加原料９はリ
ジンを含み、同リジンの成分は液体有機肥料を安定化さ
せ、これによって、液体有機肥料は温度及び圧力の影響
に対する抵抗力を有する。この結果、液体有機肥料を包
装または輸送する際、同液体有機肥料の含有物は化学変
化を起こさず、長期保存が可能となる。In FIG. 2, which shows the liquid organic fertilizer production process of the present invention, the wastewater (alcohol slag 7) formed in FIG. 1 is recovered for use as a basic raw material of the liquid organic fertilizer. Next, the alcohol residue 7 is set at the original concentration of 3.
Further concentration by a factor of 5 gives slag concentrate 8. As shown in the above table, alcohol slag 7 contains large amounts of carbon organic matter and traces of many other elements, but the percentages of nitrogen, phosphorus and potassium compounds are low for direct use as liquid fertilizer. Too much. Therefore, the slag concentrate is further added to the additive material 9 containing nitrogen (N), phosphorus (P) and potassium (K) in a ratio of 4: 1 (the ratio of the slag concentrate is 4 and the additive material is 1). Need to mix. The feedstock 9 comprises lysine, a component of which stabilizes the liquid organic fertilizer, whereby the liquid organic fertilizer is resistant to the effects of temperature and pressure. As a result, when packaging or transporting the liquid organic fertilizer, the contents of the liquid organic fertilizer do not undergo a chemical change and can be stored for a long time.

【００１０】本発明の実施例では、液体有機肥料の成分
は以下の４つの異なる化学組成とすることができる。 （１） Ｎ−Ｐ2Ｏ5−Ｋ2Ｏ＝１２−６−６（重量割
合） （２） Ｎ−Ｐ2Ｏ5−Ｋ2Ｏ＝４−４−４（重量割合） （３） Ｎ−Ｐ2Ｏ5−Ｋ2Ｏ＝１６−４−８（重量割
合） （４） Ｎ−Ｐ2Ｏ5−Ｋ2Ｏ＝４−７．５−１１．５
（重量割合） 液体有機肥料の添加原料は土壌要件に適合させるべく調
整可能である。更に、肥沃化効果を増大させるために、
液体有機肥料は固体有機肥料と混合可能である。栽培実
験を以下の作物及び果実に対して以下のように実施し
た。In an embodiment of the present invention, the components of the liquid organic fertilizer can be of four different chemical compositions: (1) N-P 2 O 5 -K 2 O = 12-6-6 ( weight ratio) (2) N-P 2 O 5 -K 2 O = 4-4-4 ( weight ratio) (3) N -P 2 O 5 -K 2 O = 16-4-8 ( weight ratio) (4) N-P 2 O 5 -K 2 O = 4-7.5-11.5
(Weight percentage) Additives for liquid organic fertilizers can be adjusted to meet soil requirements. Furthermore, in order to increase the fertilizing effect,
Liquid organic fertilizers can be mixed with solid organic fertilizers. Cultivation experiments were performed on the following crops and fruits as follows.

【００１１】（実験例１） 茎葉種栽培実験 （１）栽培実験材料：レタス （２）土壌特徴分析：(Experimental Example 1) Forage seed cultivation experiment (1) Cultivation experiment material: lettuce (2) Soil characteristic analysis:

【００１２】[0012]

【表２】 [Table 2]

【００１３】前記の土壌分析から明かなように、実験で
使用した土壌は痩せており、よって、肥料は実験材料植
物の成長に対して全面的に影響を及ぼした。 （３）栽培方法： 選択された栽培面積に対する３回の
反復散布における５０ｋｇ／ｈａ、１００ｋｇ／ｈａ、
１５０ｋｇ／ｈａ及び２００ｋｇ／ｈａの量の肥料の主
成分として窒素を使用した。使用した肥料はタイワン肥
料（Taiwan fertilizer）Ｎｏ．１（コントロールグル
ープ）並びにタイワン肥料Ｎｏ．１及び本発明の液体有
機肥料の混合物（混合物グループ）である。As evident from the above soil analysis, the soil used in the experiments was lean, and thus the fertilizer had a complete effect on the growth of the experimental plants. (3) Cultivation method: 50 kg / ha, 100 kg / ha in three repetitive sprayings on the selected cultivation area,
Nitrogen was used as the main component of the fertilizer in amounts of 150 kg / ha and 200 kg / ha. The fertilizer used was Taiwan fertilizer No. 1 (control group) and Thai fertilizer No. 1 and a mixture (mixture group) of the liquid organic fertilizers of the invention.

【００１４】（４）実験結果：(4) Experimental results:

【表３】 [Table 3]

【００１５】（５）分析： 本発明の液体有機肥料を混
合した混合物グループが固体有機肥料を単独で含むコン
トロールグループのレタス収穫量より遙かに高いレタス
収穫量を有することを上記の収穫量データは示してい
る。更に、大量の固体肥料（２００ｋｇ／ｈａを越す
量）の散布が作物生産量を減少させるダメージを招くこ
とをコントロールグループの数字は示している。したが
って、本発明の液体有機肥料の適切な混合物が効果的に
肥沃度を維持し、かつ作物生産量を増大させることを実
証している。(5) Analysis: The above-mentioned yield data shows that the mixture group obtained by mixing the liquid organic fertilizer of the present invention has a much higher lettuce yield than the control group containing the solid organic fertilizer alone. Indicates. In addition, control group figures indicate that application of large amounts of solid fertilizer (greater than 200 kg / ha) results in damage that reduces crop production. Thus, it has been demonstrated that a suitable mixture of liquid organic fertilizers of the present invention effectively maintains fertility and increases crop production.

【００１６】（実験例２） 果実種栽培実験 （１）栽培実験材料： トマト （２）土壌特徴分析： 実験１と同じ砂質土壌 （３）栽培方法： 窒素は基本肥料成分として２００ｋ
ｇ／ｈａの量で使用した。使用した肥料はタイワン肥料
Ｎｏ．１（コントロールグループ）並びにタイワン肥料
Ｎｏ．１及び本発明の液体有機肥料の混合物（混合物グ
ループ）である。(Experimental example 2) Fruit seed cultivation experiment (1) Cultivation experiment material: Tomato (2) Soil characteristic analysis: Same sandy soil as in Experiment 1 (3) Cultivation method: Nitrogen is 200k as a basic fertilizer component
g / ha used. The fertilizer used was Thai Fertilizer No. 1 (control group) and Thai fertilizer No. 1 and a mixture (mixture group) of the liquid organic fertilizers of the invention.

【００１７】（４）実験結果：(4) Experimental results:

【表４】 [Table 4]

【００１８】（５）分析： 液体有機肥料及びタイワン
肥料Ｎｏ．１の混合物（混合物グループ）で育てたトマ
トは、タイワン肥料Ｎｏ．１のみを使用して栽培したト
マトよりも更に高い植物背丈、果実数及び総収穫量を有
していた。(5) Analysis: Liquid organic fertilizer and Thai fertilizer No. Tomato grown with the mixture (mixture group) of No. 1 It had higher plant height, fruit number and total yield than tomatoes grown using only one.

【００１９】本発明の液体有機肥料及びその製造方法
は、アルコール滓を有機肥料へ変換し、これによって、
環境及び生態系への排水汚染を防止するのみならず、土
壌の有用性を維持する際の固体有機肥料の効果を増大す
る。従って、本発明は新規であり、かつ進歩的である。The liquid organic fertilizer and the method for producing the same according to the present invention convert alcohol slag into organic fertilizer,
It increases the effectiveness of solid organic fertilizers in maintaining soil availability, as well as preventing wastewater pollution to the environment and ecosystems. Therefore, the present invention is new and progressive.

【図面の簡単な説明】[Brief description of the drawings]

【図１】ショ糖の生産プロセスを示すフローチャートで
ある。FIG. 1 is a flowchart showing a sucrose production process.

【図２】本発明の液体有機肥料生産プロセスを示すフロ
ーチャートである。FIG. 2 is a flowchart showing a liquid organic fertilizer production process of the present invention.

【符号の説明】[Explanation of symbols]

１ サトウキビ ２ 糖汁液 ３ バガス ４ ショ糖 ５ 糖蜜 ６ アルコール ７ アルコール滓 ８ 滓濃縮物 ９ 添加原料 REFERENCE SIGNS LIST 1 sugarcane 2 sugar juice 3 bagasse 4 sucrose 5 molasses 6 alcohol 7 alcohol slag 8 slag concentrate 9 additive raw material

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 糖蜜をイーストによって発酵させた後、
その糖蜜からアルコール滓を得る工程と、 前記アルコール滓をその濃度の３．５倍へ濃縮し、滓濃
縮物を得る工程と、 窒素、リン、カリウム及びリジンを前記滓濃縮物へ添加
する工程と、 を含むことを特徴とする液体有機肥料の製造方法。1. After molasses is fermented with yeast,
A step of obtaining an alcohol slag from the molasses; a step of concentrating the alcohol slag to 3.5 times its concentration to obtain a slag concentrate; and a step of adding nitrogen, phosphorus, potassium and lysine to the slag concentrate. A method for producing a liquid organic fertilizer, comprising: 【請求項２】 肥沃化効果を増大するために、固体有機
肥料と所定の割合で組み合わせて使用可能であることを
特徴とする請求項１記載の液体有機肥料の製造方法。2. The method for producing a liquid organic fertilizer according to claim 1, wherein the fertilizer can be used in combination with a solid organic fertilizer at a predetermined ratio in order to increase the fertilizing effect. 【請求項３】 前記液体有機肥料の窒素（Ｎ）、リン
（Ｐ2Ｏ5）及びカリウム（Ｋ2）の各質量の比は、１
２：６：６であることを特徴とする請求項１記載の液体
有機肥料の製造方法。3. The mass ratio of nitrogen (N), phosphorus (P 2 O 5 ) and potassium (K 2 ) of the liquid organic fertilizer is 1
The method for producing a liquid organic fertilizer according to claim 1, wherein the ratio is 2: 6: 6. 【請求項４】 前記液体有機肥料の窒素（Ｎ）、リン
（Ｐ2Ｏ5）及びカリウム（Ｋ2）の各質量の比は、４：
４：４であることを特徴とする請求項１記載の液体有機
肥料の製造方法。4. The mass ratio of nitrogen (N), phosphorus (P 2 O 5 ) and potassium (K 2 ) of the liquid organic fertilizer is 4:
The method according to claim 1, wherein the ratio is 4: 4. 【請求項５】 前記液体有機肥料の窒素（Ｎ）、リン
（Ｐ2Ｏ5）及びカリウム（Ｋ2）の各質量の比は、１
６：４：８であることを特徴とする請求項１記載の液体
有機肥料の製造方法。5. The mass ratio of nitrogen (N), phosphorus (P 2 O 5 ) and potassium (K 2 ) of the liquid organic fertilizer is 1
The method for producing a liquid organic fertilizer according to claim 1, wherein the ratio is 6: 4: 8. 【請求項６】 前記液体有機肥料の窒素（Ｎ）、リン
（Ｐ2Ｏ5）及びカリウム（Ｋ2）の各質量の比は、４：
７．５：１１．５６であることを特徴とする請求項１記
載の液体有機肥料の製造方法。6. The mass ratio of nitrogen (N), phosphorus (P 2 O 5 ) and potassium (K 2 ) of the liquid organic fertilizer is 4:
The method for producing a liquid organic fertilizer according to claim 1, wherein the ratio is 7.5: 11.56.
JP11136877A 1999-05-18 1999-05-18 Production of liquid organic fertilizer Pending JP2000327469A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7776124B2 (en) 2005-10-14 2010-08-17 Archer-Daniels-Midland Company Fertilizer compositions and methods of using
CN102531750A (en) * 2012-01-18 2012-07-04 李怀付 Ferment fungus compound fertilizer and preparation method thereof
KR101260035B1 (en) * 2011-02-11 2013-05-06 김정훈 nutrient agent for plant and manufacturing method the same
CN104145584A (en) * 2014-07-31 2014-11-19 湖南农业大学 Fertilizer applying method for reducing dry land planting pollution discharge by using mixed application of organic fertilizer and chemical fertilizer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7776124B2 (en) 2005-10-14 2010-08-17 Archer-Daniels-Midland Company Fertilizer compositions and methods of using
US7811352B2 (en) 2005-10-14 2010-10-12 Archer-Daniels-Midland Company Fertilizer compositions and methods of using
KR101260035B1 (en) * 2011-02-11 2013-05-06 김정훈 nutrient agent for plant and manufacturing method the same
CN102531750A (en) * 2012-01-18 2012-07-04 李怀付 Ferment fungus compound fertilizer and preparation method thereof
CN104145584A (en) * 2014-07-31 2014-11-19 湖南农业大学 Fertilizer applying method for reducing dry land planting pollution discharge by using mixed application of organic fertilizer and chemical fertilizer

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