JP2015117154A - Slowly available liquid fertilizer and production method thereof - Google Patents
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Abstract
Description
本発明は緩効性液状肥料及びその製造方法に関する。 The present invention relates to a slow-acting liquid fertilizer and a method for producing the same.
近年、農業従事者の高齢化が進み、施肥作業の体力的負担をできるだけ少なくするために、追肥回数が少なくて済むよう緩効性肥料が広く利用されている。緩効性窒素肥料としては、グアニル尿素、アセトアルデヒド縮合尿素、イソブチルアルデヒド縮合尿素、オキサミド、グリオキサール縮合尿素、ホルムアルデヒド加工尿素肥料などの化学合成緩効性窒素肥料と肥料成分を樹脂等で被覆した被覆肥料が知られている。しかしながら、被覆肥料は施用した後に被覆資材が長く農地に残存したり、農地外に流失して環境問題になることがある。また、化学合成緩効性肥料を含有する化成肥料でも、基肥全量施用で栽培期間の長い畑作物に必要な養分を供給するには不十分とされ、基肥に加えて数回の追肥が行われている。特に、近年の異常気象における栽培環境では、作物への高温、低温、過湿、乾燥、日照不足などのストレスが強く掛かるため、これらの収量品質への影響を少なくするには、できるだけ養分ストレスが掛からないように追肥を的確にする、こまめな肥培管理が必要である。 In recent years, with the aging of farmers, slow-acting fertilizers are widely used so that the number of additional fertilizations can be reduced in order to reduce the physical burden of fertilization work as much as possible. As slow-release nitrogenous fertilizers, coated fertilizers coated with chemically synthesized slow-release nitrogenous fertilizers and fertilizer components such as guanyl urea, acetaldehyde condensed urea, isobutyraldehyde condensed urea, oxamide, glyoxal condensed urea, formaldehyde processed urea fertilizer, etc. It has been known. However, after the coated fertilizer is applied, the coated material may remain on the farmland for a long time, or may be washed away from the farmland, resulting in environmental problems. In addition, chemical fertilizers containing chemically synthesized slow-release fertilizers are considered insufficient to supply the nutrients necessary for field crops with a long cultivation period by applying the whole amount of basic fertilizer, and several additional fertilizers are performed in addition to the basic fertilizer. ing. In particular, the cultivation environment under abnormal weather in recent years is strongly stressed by crops such as high temperature, low temperature, overhumidity, drying, lack of sunlight, etc. Diligent fertilizer management is necessary to ensure topdressing so that it does not hang.
しかしながら、農業従事者の高齢化が一段と進んでいる農産物の生産現場では、露地栽培、施設栽培のいずれの畑作物栽培や従来から穂肥、実肥などの追肥が行われている水稲栽培の場面でも追肥作業負担の軽減に寄与できる追肥回数が減らせる緩効性肥料が強く求められている。特に、水稲栽培場面での追肥用肥料は、粒状品では圃場全体に散布する必要があり、その追肥の施肥作業は耕作者が高齢化している現状では相当な負担になっている。また、施肥作業の負担を減らすことを目的に細粒等の粒状肥料を水口で施用しても肥料養分が圃場全体に拡散しにくいという欠点がある。この点からも水口で施用できる液状の緩効性肥料が強く望まれている。 However, at the production site of agricultural products where the aging of farmers is further advanced, there are scenes of paddy rice cultivation where field crop cultivation, either open field cultivation or facility cultivation, and traditional fertilization such as pantilization and actual fertilization has been carried out However, there is a strong demand for a slow-acting fertilizer that can reduce the number of times of topdressing that can contribute to reducing the burden of topdressing work. In particular, the fertilizer for top fertilization in paddy rice cultivation needs to be applied to the entire field in the case of granular products, and the fertilization work for the top fertilization is a considerable burden in the current situation where the farmer is aging. Moreover, even if granular fertilizers such as fine grains are applied at the water inlet for the purpose of reducing the burden of fertilizing work, there is a drawback that the fertilizer nutrients are difficult to diffuse throughout the field. From this point of view, a liquid slow-acting fertilizer that can be applied at the mouth is strongly desired.
前記のような問題の解決方法として、特許文献１には、ジシアンジアミドを含有するシアナミド酸性水溶液からなる緩効性液状肥料が記載されているが、保存期間中にジシアンジアミドが増加するなど品質が一定しない問題があった。ジシアンジアミドの含有量が多くなると作物に害作用を引き起こす場合があるので、注意を要する。 As a solution to the above problems, Patent Document 1 describes a slow-acting liquid fertilizer comprising a cyanamide acidic aqueous solution containing dicyandiamide, but the quality is not constant, such as an increase in dicyandiamide during the storage period. There was a problem. Caution should be exercised because increasing the content of dicyandiamide may cause harmful effects on crops.
また、グアニル尿素の製造方法については、特許文献２、３に開示されているが、いずれもグアニル尿素を粉状結晶として製造回収するための方法であり、本発明とは目的が全く異なり、りん酸とジシアンジアミドのモル比も異なるものである。 In addition, the methods for producing guanylurea are disclosed in Patent Documents 2 and 3, both of which are methods for producing and recovering guanylurea as powdered crystals, the purpose of which is completely different from the present invention. The molar ratio of acid to dicyandiamide is also different.
本発明の課題は、追肥回数を減らして追肥作業負担を軽減できるグアニル尿素を含有する緩効性液状肥料を提供することを目的とする。 An object of the present invention is to provide a slow-acting liquid fertilizer containing guanylurea that can reduce the number of times of topdressing and reduce the topdressing work burden.
本発明者らは、前記課題を解決すべく鋭意研究を重ねた結果、所定濃度のりん酸を含有する溶液に所定の割合でジシアンジアミドを添加して７０℃以下で反応させて得られるグアニル尿素液を使用することによって、畑作物の露地栽培、施設栽培、水稲栽培における追肥回数を減らすことができ、しかも水稲栽培では水口施用に対応できることを見出し、本発明を完成させるに至った。 As a result of intensive studies to solve the above problems, the present inventors have added dicyandiamide at a predetermined ratio to a solution containing a predetermined concentration of phosphoric acid and allowed to react at 70 ° C. or lower to obtain a guanyl urea solution. As a result, it has been found that the number of additional fertilization in open field cultivation, facility cultivation, and paddy rice cultivation of field crops can be reduced, and that the paddy rice cultivation can be applied to water lip application, and the present invention has been completed.
即ち、本発明は、以下の発明を包含する。
（１）４０重量％以上８５重量％未満のりん酸を含有する溶液１００容量部に７重量部以上３５重量部以下のジシアンジアミドを添加して７０℃以下で反応させることを含むグアニル尿素液の製造方法。
（２）前記（１）に記載の製造方法によって得られるグアニル尿素液を含有する緩効性液状肥料。
（３）グアニル尿素以外の窒素源、りん酸源及び加里源から選ばれる少なくとも１種を含有する前記（２）に記載の緩効性液状肥料。
（４）緩効性液状肥料の全窒素に対するグアニル尿素由来の窒素成分の比率が１０％以上である前記（２）又は（３）に記載の緩効性液状肥料。
That is, the present invention includes the following inventions.
(1) Production of a guanylurea solution comprising adding 7 parts by weight or more and 35 parts by weight or less of dicyandiamide to 100 parts by volume of a solution containing 40% by weight or more and less than 85% by weight of phosphoric acid and reacting at 70 ° C. or less Method.
(2) A slow-acting liquid fertilizer containing a guanylurea solution obtained by the production method according to (1).
(3) The slow-acting liquid fertilizer according to (2), containing at least one selected from a nitrogen source other than guanylurea, a phosphate source, and a potassium source.
(4) The slow-acting liquid fertilizer according to (2) or (3), wherein the ratio of the nitrogen component derived from guanylurea to the total nitrogen of the slow-acting liquid fertilizer is 10% or more.
本発明によれば、グアニル尿素を含有する液を効率よく製造でき、製造したグアニル尿素液を含有する緩効性液状肥料を使用することによって、作物栽培中の追肥回数を減らすことができ、近年の農業従事者の高齢化に伴う施肥作業への負担軽減が可能になる。 According to the present invention, a liquid containing guanylurea can be efficiently produced, and by using a slow-acting liquid fertilizer containing the produced guanylurea liquid, the number of times of topdressing during crop cultivation can be reduced. It is possible to reduce the burden on fertilization work accompanying the aging of farmers in Japan.
先ず、本発明のグアニル尿素液の製造方法について説明する。
本発明のグアニル尿素液の製造方法においては、４０重量％以上８５重量％未満のりん酸を含有する溶液１００容量部に７重量部以上３５重量部以下のジシアンジアミドを７０℃以下で反応させて製造し、液状の状態で得る。
First, the manufacturing method of the guanyl urea liquid of this invention is demonstrated.
In the method for producing a guanylurea solution of the present invention, it is produced by reacting 100 parts by volume of a solution containing 40% by weight or more and less than 85% by weight of phosphoric acid at 70 ° C. or less with 7 to 35 parts by weight of dicyandiamide. And obtained in a liquid state.
前記りん酸を含有する溶液としては、通常りん酸水溶液を使用するが、苦土、ホウ素、マンガン、鉄、亜鉛、モリブデン等から選ばれる少なくとも１種の成分を含有するりん酸水溶液を使用してもよい。 As the solution containing phosphoric acid, a phosphoric acid aqueous solution is usually used, but a phosphoric acid aqueous solution containing at least one component selected from bitter earth, boron, manganese, iron, zinc, molybdenum and the like is used. Also good.
４０重量％未満の濃度のりん酸を含有する溶液を使用するとジシアンジアミドとの反応性が悪く、目的濃度以上のグアニル尿素を得ることができなかったり、また、８５重量％以上の濃度のりん酸を含有する溶液を使用すると溶液がゲル化し固化してしまうなどの問題が起こる。従って、使用するりん酸液の濃度は、４０重量％以上８５重量％未満で、好ましくは４０重量％以上８３重量％以下であり、さらに好ましくは、６０重量％以上８０重量％以下である。また、所定濃度のりん酸液に添加するジシアンジアミドの添加量は、当該りん酸液１００容量部に対して、７重量部以上３５重量部以下で、好ましくは１７重量部以上３２重量部以下である。 When a solution containing phosphoric acid with a concentration of less than 40% by weight is used, the reactivity with dicyandiamide is poor, and guanylurea exceeding the target concentration cannot be obtained, or phosphoric acid with a concentration of 85% by weight or more cannot be obtained. When the contained solution is used, problems such as gelation and solidification of the solution occur. Therefore, the concentration of the phosphoric acid solution to be used is 40% by weight or more and less than 85% by weight, preferably 40% by weight or more and 83% by weight or less, and more preferably 60% by weight or more and 80% by weight or less. The amount of dicyandiamide added to the phosphoric acid solution having a predetermined concentration is 7 parts by weight or more and 35 parts by weight or less, preferably 17 parts by weight or more and 32 parts by weight or less with respect to 100 parts by volume of the phosphoric acid solution. .
また、りん酸を含有する溶液とジシアンジアミドを反応させる場合の温度が７０℃を超えると生成したグアニル尿素がグアニジンに変性するばかりでなく、さらに１００℃を超える温度ではアンモニアにまで分解して揮散し窒素成分が損失してしまう。従って、りん酸を含有する溶液とジシアンジアミドを反応させる場合の温度は、７０℃以下に保つ必要がある。反応させる温度を７０℃以下に保つには反応容器を冷却してもよいが、冷却経費を削減するには、りん酸液へのジシアンジアミドの添加を少量ずつ行う方法が推奨される。 In addition, when the temperature in the case of reacting a solution containing phosphoric acid with dicyandiamide exceeds 70 ° C., the generated guanylurea is not only denatured into guanidine, but further decomposes into ammonia and vaporizes at a temperature exceeding 100 ° C. Nitrogen component is lost. Therefore, it is necessary to keep the temperature at which the solution containing phosphoric acid and dicyandiamide are reacted at 70 ° C. or lower. The reaction vessel may be cooled to keep the reaction temperature at 70 ° C. or lower. However, in order to reduce the cooling cost, a method of adding dicyandiamide to the phosphoric acid solution little by little is recommended.
前記のようにして調製したグアニル尿素液は、そのまま緩効性液状肥料として使用してもよいが、使用する対象作物や施用時期など必要に応じて、調製したグアニル尿素液にその他の肥料原料、水等を添加溶解し、全窒素量に対するグアニル尿素に由来する窒素成分量が１０％以上になるように調製して緩効性液状肥料としてもよい。 The guanylurea solution prepared as described above may be used as a slow-acting liquid fertilizer as it is, but if necessary, such as the target crop to be used and the application time, other fertilizer raw materials are added to the prepared guanylurea solution, Water or the like may be added and dissolved so that the amount of nitrogen component derived from guanylurea with respect to the total amount of nitrogen is 10% or more to obtain a slow-release liquid fertilizer.
本発明の緩効性液状肥料におけるグアニル尿素の含有率は、作物に対する肥料効果及び液状肥料の保存安定性の点から、液状肥料中の全窒素量に対するグアニル尿素に由来する全窒素量が通常１０％以上で、好ましくは３０％以上６０％以下である。このグアニル尿素の含有量が１０％を下回ると窒素肥効の緩効度が小さく、追肥回数を減らす効果が低くなり、一方、６０％を上回ると製造してから短期間で使用するには問題ないが、低温環境等で長期間保存する場合には、結晶や沈殿物が析出するなどの問題が発生しやすくなる。 The content of guanylurea in the slow-release liquid fertilizer of the present invention is usually 10 in terms of the total nitrogen amount derived from guanylurea relative to the total nitrogen amount in the liquid fertilizer from the viewpoint of the fertilizer effect on the crop and the storage stability of the liquid fertilizer. % Or more, preferably 30% or more and 60% or less. If the guanylurea content is less than 10%, the slow effect of nitrogen fertilization is small and the effect of reducing the number of topdressing is reduced. On the other hand, if the content exceeds 60%, it is a problem to use in a short period after production. However, when it is stored for a long time in a low temperature environment or the like, problems such as precipitation of crystals and precipitates are likely to occur.
本発明の緩効性液状肥料に混合するグアニル尿素以外の原料としては、例えば、以下のようなものが挙げられる。 Examples of raw materials other than guanylurea to be mixed with the slow-acting liquid fertilizer of the present invention include the following.
窒素源としては、尿素、硫安、塩安、硝安、硝酸ソーダ等、りん酸源としては、りん酸、りん酸一アンモニウム、りん酸二アンモニウム、りん酸三アンモニウム、りん酸一カリウム、りん酸二カリウム等、及び加里源としては、硫酸加里、塩化加里、硝酸加里、水酸化加里等が挙げられる。 Nitrogen sources include urea, ammonium sulfate, ammonium chloride, ammonium nitrate, sodium nitrate, and phosphoric acid sources include phosphoric acid, monoammonium phosphate, diammonium phosphate, triammonium phosphate, monopotassium phosphate, diphosphate Examples of potassium and potassium sources include potassium sulfate, potassium chloride, nitrate, and hydroxide.
また、必要に応じて、第２級高級アルコールエトキシレート、ジアルキルエステルスルホン酸塩などの界面活性剤やアラビアガム、グアガム、キサンタンガム、サクシノグリカンなどの増粘剤を添加してもよい。 If necessary, surfactants such as secondary higher alcohol ethoxylates and dialkyl ester sulfonates and thickeners such as gum arabic, guar gum, xanthan gum and succinoglycan may be added.
以下、実施例及び比較例によって本発明をさらに詳述するが、本発明はこれらの実施例により限定されるものではない。 EXAMPLES Hereinafter, although this invention is explained in full detail according to an Example and a comparative example, this invention is not limited by these Examples.
［１−１グアニル尿素液の製造におけるグアニル尿素の生成率に及ぼすりん酸濃度とジシアンジアミドの添加量］
りん酸濃度が２０〜８５重量％のりん酸水溶液１００ｍｌに対するジシアンジアミドの添加量を変えて添加した表１に示した比較例１〜３及び実施例１〜８の混合物を、温度２０℃の恒温槽内で２４時間撹拌後、ろ過したろ液中のグアニル尿素態窒素の含有量を高速液体クロマトグラフィー（日本分光(株)製ＨＰＬＣ２０８０）で分析し、グアニル尿素態窒素の生成率を算出した。結果を表１に示す。
[Addition of phosphoric acid concentration and dicyandiamide on the production rate of guanylurea in the production of 1-1 guanylurea solution]
A mixture of Comparative Examples 1 to 3 and Examples 1 to 8 shown in Table 1 to which the amount of dicyandiamide added with respect to 100 ml of phosphoric acid aqueous solution having a phosphoric acid concentration of 20 to 85% by weight was added was a constant temperature bath at a temperature of 20 ° C. After stirring for 24 hours, the content of guanylurea nitrogen in the filtered filtrate was analyzed by high performance liquid chromatography (HPLC 2080 manufactured by JASCO Corporation) to calculate the production rate of guanylurea nitrogen. The results are shown in Table 1.
表１に示した結果のとおり、比較例１、２ではグアニル尿素態窒素の含有率が２％以下でその生成率も６０％以下と低く、また比較例３では生成物が固化してしまった。それに対して、実施例１〜８は、グアニル尿素態窒素の含有率が２％以上で生成率も６０％以上であり、本発明の方法によって、効率よくグアニル尿素液を調製することができた。 As shown in Table 1, in Comparative Examples 1 and 2, the content of guanylurea nitrogen was 2% or less and the production rate was as low as 60% or less. In Comparative Example 3, the product was solidified. . On the other hand, in Examples 1 to 8, the content of guanylurea nitrogen was 2% or more and the production rate was 60% or more, and the guanylurea liquid could be efficiently prepared by the method of the present invention. .
［１−２グアニル尿素液の製造における反応温度の影響］
（実施例９）
りん酸濃度が７５重量％のりん酸水溶液２０００ｍｌを３０００ｍｌガラスビーカーに入れ、スリーワンモーターで撹拌しながら、ジシアンジアミド６００ｇを２００ｇずつ３回に分けて添加し反応させた。その時のジシアンジアミド添加後の反応温度と、２４時間後の調製液中のグアニル尿素態窒素及びグアニジン態窒素の含有量を高速液体クロマトグラフィー（日本分光(株)製ＨＰＬＣ２０８０）で分析し、グアニル尿素態窒素の生成率を算出した結果を表２に示す。
[Effect of reaction temperature on production of 1-2 guanylurea solution]
Example 9
In a 3000 ml glass beaker, 2000 ml of a phosphoric acid aqueous solution having a phosphoric acid concentration of 75% by weight was put into a 3000 ml glass beaker, and 600 g of dicyandiamide was added in three portions of 200 g while stirring with a three-one motor. The reaction temperature after the addition of dicyandiamide at that time and the contents of guanylurea nitrogen and guanidine nitrogen in the prepared solution after 24 hours were analyzed by high performance liquid chromatography (HPLC 2080 manufactured by JASCO Corporation), and guanylurea state The results of calculating the nitrogen production rate are shown in Table 2.
（比較例４）
りん酸濃度が７５重量％のりん酸水溶液２０００ｍｌを３０００ｍｌガラスビーカーに入れ、スリーワンモーターで撹拌しながら、ジシアンジアミド６００ｇを１回で添加し反応させた。その時のジシアンジアミド添加後の反応温度と、２４時間後の調製液中のグアニル尿素態窒素及びグアニジン態窒素の含有量を高速液体クロマトグラフィー（日本分光(株)製ＨＰＬＣ２０８０）で分析し、グアニル尿素態窒素の生成率を算出した結果を表２に示す。
(Comparative Example 4)
In a 3000 ml glass beaker, 2000 ml of a phosphoric acid aqueous solution having a phosphoric acid concentration of 75% by weight was put into a 3000 ml glass beaker, and 600 g of dicyandiamide was added and reacted at one time. The reaction temperature after the addition of dicyandiamide at that time and the contents of guanylurea nitrogen and guanidine nitrogen in the prepared solution after 24 hours were analyzed by high performance liquid chromatography (HPLC 2080 manufactured by JASCO Corporation), and guanylurea state The results of calculating the nitrogen production rate are shown in Table 2.
表２に示した結果のとおり、反応温度が７０℃を超えた比較例４は、窒素の揮散損失が生じ、実施例９に比べて生成した液状肥料の窒素全量、グアニル尿素態窒素の含有率、生成率とも低い上にグアニジン態窒素も生成した。それに対して、反応温度を７０℃以下に制御して調製した実施例９は、グアニル尿素態窒素の含有率、生成率とも高く、グアニジン態窒素の生成も見られず、本発明の方法によって、効率よくグアニル尿素液を調製することができた。 As shown in Table 2, Comparative Example 4 in which the reaction temperature exceeded 70 ° C. caused nitrogen volatilization loss, and the total amount of nitrogen in the liquid fertilizer produced compared to Example 9, the content of guanylurea nitrogen The production rate was low and guanidine nitrogen was also produced. On the other hand, Example 9 prepared by controlling the reaction temperature to 70 ° C. or lower has a high guanylurea nitrogen content and production rate, and no guanidine nitrogen is produced. According to the method of the present invention, A guanylurea solution could be prepared efficiently.
［１−３緩効性液状肥料（ＴＮ１０％内ＧｕＮ３％−ＷＰ１３％−ＷＫ５％）の製造］
（実施例１０）
りん酸濃度が７５重量％のりん酸水溶液１６Ｌを３０Ｌポリ容器に入れ、周囲を冷水で冷やしながら、ジシアンジアミド４．８ｋｇを９６０ｇずつ５回に分けて添加しスリーワンモーターで撹拌して反応させた。本反応液２５ｋｇを１５０Ｌポリ容器内の水道水３７．５ｋｇに加え、さらに尿素１３．５ｋｇ及び塩化加里８ｋｇを溶解して、緩効性液状肥料とした。
[Production of 1-3 slow-release liquid fertilizer (TN of GuN 3% -WP13% -WK 5%)]
(Example 10)
16 L of phosphoric acid aqueous solution having a phosphoric acid concentration of 75% by weight was placed in a 30 L plastic container, and 4.8 kg of dicyandiamide was added in 5 portions of 960 g while being cooled with cold water, and the mixture was stirred and reacted with a three-one motor. 25 kg of this reaction solution was added to 37.5 kg of tap water in a 150 L plastic container, and further 13.5 kg of urea and 8 kg of potassium chloride were dissolved to obtain a slow-acting liquid fertilizer.
［１−４液状肥料（ＴＮ１５％−ＷＰ５％−ＷＫ５％）の製造］
（比較例５）
１５０Ｌポリ容器に入れた水４７．５ｋｇに尿素３３．５ｋｇ、りん酸濃度が７５重量％のりん酸水溶液１０ｋｇ、塩化加里９ｋｇを溶解して液状肥料とした。
[Production of 1-4 liquid fertilizer (TN15% -WP5% -WK5%)]
(Comparative Example 5)
A liquid fertilizer was prepared by dissolving 33.5 kg of urea, 10 kg of an aqueous phosphoric acid solution having a phosphoric acid concentration of 75% by weight, and 9 kg of potassium chloride in 47.5 kg of water placed in a 150 L plastic container.
［１−５緩効性液状肥料（実施例１０）の効果試験］
隣接した２枚の水田（１枚の面積が１５００ｍ２）各々に基肥として化成肥料（ＴＮ１０％−ＣＰ１５％−ＷＫ１３％）を４０ｋｇ施用して水稲（品種：コシヒカリ）を５月５日に植えた。田植え６６日後に１枚の水田（１５００ｍ２）に、実施例１０で調製した緩効性液状肥料２１ｋｇを水口施用追肥した。同日にもう１枚の水田（１５００ｍ２）に比較例５で調製した液状肥料１４ｋｇを水口施用追肥した。水稲の生育状況を液状肥料追肥の施肥８日前、施肥当日、施肥後２０日、４０日、４８日後に調査比較した。８月２７日に坪刈りを実施し、収量を調査比較した。結果を表３及び４に示す。
[Efficacy test of 1-5 slow-acting liquid fertilizer (Example 10)]
40 kg of chemical fertilizer (TN10% -CP15% -WK13%) was applied as a basic fertilizer to each of two adjacent paddy fields (one area of 1500 m 2 ), and paddy rice (variety: Koshihikari) was planted on May 5 . Sixty days after rice planting, 21 kg of slow-acting liquid fertilizer prepared in Example 10 was added to a single paddy field (1500 m 2 ) for additional fertilizer application. On the same day, 14 kg of the liquid fertilizer prepared in Comparative Example 5 was added to the other paddy field (1500 m 2 ) for additional fertilization. The growth situation of paddy rice was investigated and compared 8 days before the fertilization of liquid fertilizer, the day of fertilization, 20 days, 40 days and 48 days after fertilization. On August 27, plowing was carried out, and the yield was investigated and compared. The results are shown in Tables 3 and 4.
表３に示した結果のとおり、茎数については、比較例５区は施肥２０日後、４０日後の時期では実施例１０区に優っているが、施肥４８日後になるとその減少が激しく、実施例１０区より少なくなった。それに比べて、実施例１０区は、施肥４０日以降の茎数が確保され、有効茎歩合が高かった。表３の葉色についても、比較例５区に比べて、実施例１０区では、施肥２０日後からの施肥４０日後、施肥４８日後での葉色の減少が少なく、明らかに確保されていた。 As shown in Table 3, as for the number of stems, the comparative example 5 ward is superior to the example 10 ward 20 days after fertilization and 40 days later, but the decrease is severe after 48 days after fertilization. Less than 10 wards. In comparison, in Example 10 ward, the number of stems after 40 days of fertilization was secured, and the effective stem ratio was high. The leaf color of Table 3 was clearly ensured in Example 10 ward as compared with Comparative Example 5 ward, with less decrease in leaf color 40 days after fertilization 20 days after fertilization and 48 days after fertilization.
また、表４に示した結果のとおり、比較例５を施用した水稲に比べ、実施例１０を施用した水稲は収量も優った。 In addition, as shown in Table 4, the paddy rice applied with Example 10 was superior in yield to the paddy rice applied with Comparative Example 5.
このように、比較例５の液状肥料区ではさらに追肥が必要であるのに対し、本発明の緩効性液状肥料（実施例１０）の使用によって、１回の追肥で対応でき、追肥作業の負担を軽減することができた。 Thus, in the liquid fertilizer section of Comparative Example 5, additional fertilization is required, but by using the slow-acting liquid fertilizer of the present invention (Example 10), it can be handled by a single additional fertilizer, It was possible to reduce the burden.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017066010A (en) * | 2015-10-01 | 2017-04-06 | エムシー・ファーティコム株式会社 | Guanylurea-containing granular fertilizer for upland farming |
| CN107721883A (en) * | 2016-08-12 | 2018-02-23 | 宁夏天成生化科技有限公司 | A kind of preparation method of guanylurea phosphate |
| CN114149291A (en) * | 2021-12-30 | 2022-03-08 | 河北萌帮水溶肥料股份有限公司 | Slow-release liquid nitrogen fertilizer, preparation method and application thereof in fruit trees |
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| JPH01199527A (en) * | 1988-02-04 | 1989-08-10 | Ube Ind Ltd | Water culture kit for herb |
| JP2011105541A (en) * | 2009-11-17 | 2011-06-02 | Sumitomo Chemical Co Ltd | Liquid fertilizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH01199527A (en) * | 1988-02-04 | 1989-08-10 | Ube Ind Ltd | Water culture kit for herb |
| JP2011105541A (en) * | 2009-11-17 | 2011-06-02 | Sumitomo Chemical Co Ltd | Liquid fertilizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017066010A (en) * | 2015-10-01 | 2017-04-06 | エムシー・ファーティコム株式会社 | Guanylurea-containing granular fertilizer for upland farming |
| CN107721883A (en) * | 2016-08-12 | 2018-02-23 | 宁夏天成生化科技有限公司 | A kind of preparation method of guanylurea phosphate |
| CN114149291A (en) * | 2021-12-30 | 2022-03-08 | 河北萌帮水溶肥料股份有限公司 | Slow-release liquid nitrogen fertilizer, preparation method and application thereof in fruit trees |
| CN114149291B (en) * | 2021-12-30 | 2022-07-22 | 河北萌帮水溶肥料股份有限公司 | Slow-release liquid nitrogen fertilizer, preparation method and application thereof in fruit trees |
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