A series of fertilizers produced by reacting humic acid (nitrohumic acid) obtained by slowly oxidizing and decomposing coal or lignite with nitric acid or a mixture of nitric acid and sulfuric acid with bases such as ammonia, magnesium hydroxide, burnt serpentine powder, potassium bicarbonate, and potassium hydroxide. Depending on the base added, there are three types: humic acid ammonia fertilizer, humic acid magnesium fertilizer, and humic acid potassium fertilizer, and they are used as a single fertilizer or as a raw material for mixed fertilizers. These fertilizers are intended to have a soil improving effect due to the fertilizer components they contain, such as ammonia (about 4%), magnesium (magnesium, about 4%), and potassium (about 11%), as well as a soil improving effect due to nitrohumic acid (content 40-75%). Source: Heibonsha World Encyclopedia, 2nd Edition Information |
石炭または亜炭を硝酸あるいは硝酸と硫酸の混液で低度に酸化分解して得られる腐植酸(ニトロフミン酸)に塩基類のアンモニア,水酸化マグネシウム,焼成蛇紋岩粉末あるいは重炭酸カリウム,水酸化カリウムを加えて反応させて製造した一連の肥料をいう。添加する塩基によって腐植酸アンモニア肥料,腐植酸苦土肥料,腐植酸カリ肥料の3種類があり,単肥としてまた配合肥料原料として用いられている。これらは含有されるアンモニア(約4%),苦土(マグネシウム,約4%),カリウム(約11%)などの肥料成分による肥効とともに,ニトロフミン酸(含有量40~75%)による土壌改良効果を目的としている肥料である。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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