沼渣与水分的耦合对温室土壤N积累及重金属污染状况的研究

Studied on the Heavy Metal Pollution and N Accumulation of Water-Biogas Dregs Coupling in Greenhouse Soil

采用完全随机区组田间试验设计的方法,以番茄为供试作物,研究了沼渣与水分的耦合对温室土壤N积累及重金属污染状况。结果表明,低灌溉量下,沼渣与化肥配合使用有利于土壤中重金属累积量的减少;就土壤中N积累状况而言,S2F2为较适宜的水肥组合。综合两方面得知,S2F2水肥组合有利于土壤环境的改善,为后续作物的栽培提供足够的N源,即3 000 m3/hm2灌水量+40%沼渣+60%化肥为较适宜的水肥组合。

A randomized block field experiment was conducted in greenhouse to studied on the heavy metal pollution and N accumulation of water-biogas dregs coupling in greenhouse soil when tomato as the test crop.The results showed that the effect of water-biogas dregs coupling was beneficial to decrease the content of heavy metal at low irrigation level.In terms of the N accumulation conditions S2F2 treat was the more suitable one.In a word,S2F2 treat was useful to the soil environment and it could provided adequate N source,that is 3 000 m3/hm2 water 40% biogas dregs 60% fertilizer was a more appropriate water and fertilizer combinations.