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采用田间调查和实验室土壤分析方法,探讨了VT秸秆腐熟剂对怀集县秸秆腐解速度和土壤肥力的影响,以其更好地增加土壤肥力。结果表明,施用VT腐熟剂可以有效增加土壤的酸碱缓冲作用,加快秸秆腐解速度,提高土壤有机质含量。施用VT腐熟剂后,水稻秸秆的腐解程度在腐熟前期明显优于常规秸秆还田,有机质含量明显提升,有效磷含量明显下降,速效钾含量和缓效钾含量比对照明显上升,全磷含量和对照有显著差异,全钾含量比对照有所减少。
Field investigation and laboratory soil analysis were used to investigate the effects of VT straw composting agent on the rate of straw decomposition and soil fertility in Huaiji County, in order to increase soil fertility. The results showed that the application of VT maturity agent can effectively increase the acid-base buffer effect of soil, accelerate the decomposition rate of straw and increase the content of soil organic matter. After application of VT maturity agent, the decomposing degree of rice straw was obviously better than that of conventional straw returning before composting, the content of organic matter obviously increased, the content of available phosphorus decreased obviously, the content of available potassium and slow-acting potassium increased obviously, the content of total phosphorus and Control had significant differences, total potassium content decreased compared with the control.