沼液在小麦上的安全利用研究

Study on the Safe Utilization of Biogas Slurry on Wheat

摘要: 沼液富含氮、磷、钾、微量元素等多种植物生长所需养分和丰富的有机质及各种维生素等，是一种较好的有机营养肥料。但由于存在土壤污染和抑制生长等风险，各地施用存在差异。本试验以小麦为试材，研究沼液代替化肥的风险及对小麦的影响。研究证明：猪粪沼液30~50 m³/亩施用量对土壤重金属污染的风险较小，施用适合前重后轻，施用过晚或后期施用量过大，有贪青晚熟的风险。

Abstract: Biogas slurry is rich in nitrogen, phosphorus, potassium, trace elements and other nutrients re-quired for plant growth, as well as rich in organic matter and various vitamins. It is a good organic nutrient fertilizer. However, due to the risks of soil pollution and growth inhibition, the application varies from place to place. In this experiment, wheat was used to study the risk of biogas slurry replacing chemical fertilizer and its impact on wheat. Research proves that: The application amount of pig manure biogas slurry 30~50 m³/Mu has a small risk of soil heavy metal pollution. The application is suitable for the former heavy and the latter light. If the application amount is too late or too large in the later stage, there is a risk of green and late ripening.