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1970年以来,红光大队逐步实现了农业机械化和沼气化,省下的稿秆就还田了。从1974年起,我们研究了稿秆直接还田对作物产量与改良土壤的效果,现简要介绍如下:一、几种作物稿秆的分解速度施入稻田中的稿秆,由于微生物活动而逐渐分解,其分解速度与稿秆物质组成密切相关,一般是碳、氮比率相对低的分解快些,如稻草;碳、氮比率相对高的分解慢些,如麦秆。而且分解速度的差异主要表现在还秆后的第一个月。这是因为碳、氮比率低的,可溶性物质中简单的有机物含量高,因此分解快;反之,随着碳、氮比率上升,纤维素和半纤维素较难分解的碳素化合物
Since 1970, the Red Brigade has gradually realized the mechanization of agriculture and biogasification, and the draft saved has been returned to the field. Since 1974, we studied the effect of direct straw returning on crop yield and soil improvement. The brief introduction is as follows: 1. The decomposition speed of straw for several crops The straw applied to paddy fields gradually fills due to microbial activity Decomposition, its decomposition rate is closely related to the composition of manure, the carbon and nitrogen ratio is generally relatively low decomposition faster, such as straw; carbon and nitrogen relatively high decomposition rate slower, such as straw. And the speed of decomposition is mainly manifested in the first month after stalks. This is because the carbon and nitrogen ratio is low, the soluble matter has a high content of simple organic matter, and thus decomposes quickly; on the contrary, as the ratio of carbon and nitrogen increases, the carbon compound which is hard to be decomposed by cellulose and hemicellulose