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中性亚硫酸铵造纸制浆废液(简称黑液),是一种有机无机混合肥料。黑液以含氮量为最高;钾次之;磷微量。此外,黑液还含有细纤维、还原糖、木质素以及亚硫酸根(SO_3~(2-))等还原性物质。黑液作为氮肥在水田施用,最为人们关注的是其中带进的还原性物质,它可能使土壤中还原性物质累积过多,从而对作物生长产生危害。为此,本实验在田间试验观察比较的
Neutral ammonium sulphite papermaking waste liquid (referred to as black liquor), is an organic-inorganic fertilizer. Black liquor is the highest nitrogen content; potassium secondary; phosphorus trace. In addition, black liquor also contains fine fibers, reducing sugars, lignin and sulfite (SO_3 ~ (2-)) and other reducing substances. Black liquor is applied as a nitrogen fertilizer in paddy fields. The most concern is the reducing substances introduced into it. It may cause excessive accumulation of reducing substances in the soil and thus endanger the growth of crops. To this end, the experiment observed in the field comparison