施用猪场粪污沼液对土壤理化性质的影响

[目的]研究施用沼液土壤耕层理化性状变化规律,提出沼液最大承载量。[方法]以玉米为试材,采用田间试验,探讨了不同沼液施用量对土壤理化性质的影响。[结果]施用沼液可以有效地增加土壤表层有机质和各种养分的含量,增加土壤的通透性,改善土壤团粒结构。[结论]随着沼液施用量的增加,土壤中氮、磷、钾含量增加,增幅顺序为速效磷含量>速效钾含量>全磷含量>全氮含量>全钾含量>速效氮含量。为避免因土壤速效磷的过剩而流入水体,利用猪场粪污沼液种玉米,施用量应控制在118.73 t/hm2以内。

Effects of Application of Biogas Slurry of Pig Dung on Physical and Chemical Properties of Soil

[Objective] The variation law of the application of biogas slurry on the soil physical and chemical properties was studied to put forward the maximum carrying capacity of biogas slurry.[Method] The impact of different application rate of biogas slurry on physical and chemical properties of soil was studied through field experiment with corn as test materials.[Result] The application of biogas slurry could effectively increase the content of the organic matter and nutrients in the surface of the soil,increase the permeability of the soil,and improve soil aggregate structure.[Conclusion] The content of nitrogen,phosphorus,potassium in soil increased quickly with the increase application rate of biogas slurry,and the order was available P>available K>total P>total N>total K>available N.To avoid the excess of available P in the soil flowing into water,the corn should be cultivated with pig dung biogas slurry,and the application rate of biogas slurry should be controlled less than 118.73 tons/hm2.