设施栽培对土壤环境质量的影响

Influence of installation cultivation on soil environmental quality

为了解决设施栽培土壤退化问题,以沈阳西郊不同种植年限的蔬菜温室为研究对象,采用实地采样分析的方法,对设施栽培土壤环境质量状况进行了研究。结果表明,不同种植年限的温室土壤全盐、硝酸盐含量均显著高于露地土壤,并随着种植年限呈增加的趋势。温室土壤pH值与露地土壤相比呈下降的趋势。在温室蔬菜不同生长季,随着番茄的生长,土壤盐分及硝态氮含量均呈增加的趋势,土壤pH值呈下降的趋势。温室土壤环境质量随着种植年限增加而逐渐下降。从工程、生物和农艺措施方面提出了解决设施栽培土壤退化问题的建议。

The status of soil environmental quality is investigated in an age sequence of vegetable greenhouses in the western suburb of Shenyang. The electrolytic conductivity and nitrate content increased and pH values declined significantly in greenhouse soil than in field soil. The electrolytic conductivity and nitrate content also increased and soil pH declined gradually with tomato growth in greenhouses. The environmental quality became worse in greenhouse soil than in field soil. The suggestions for greenhouse soil amelioration are offered according to the engineering, biological and agronomic aspects.