沈阳城郊温室土壤特性调查研究

Investigation on characteristics of greenhouse soils in Shenyang region

对城郊于洪区有代表性的 1 1 0个温室土样进行了研究 .结果表明 ,与原耕作土壤相比 ,碱解氮、有效磷增幅较大 ,pH值呈下降趋势 ,电导率呈升高态势 ,有效铜呈降低而有效锌呈升高趋势 .电导率与硝态氮呈正相关 ,表明温室土壤存在酸化和次生盐渍化倾向 .蔬菜产量与土壤全氮、有效磷呈正相关 ,而与碱解氮呈负相关 .优化施肥、注重有机肥施用 ,控制氮肥用量 ,有针对性地施用石灰 ,注意灌水方法是城郊温室土壤管理的重点 .

We investinated 110 representative soil samples of plough horizons in Yuhong.The results showed that soil avalable nitrogen and phosphorous increased largely,while pH tended to decrease and electric conductivity became higher compared with the original soils.In addition,soil available Zn rose,whereas available Cu declined.The findings indicated that the soils might be on the way to acidification and salinity.The approaches for improving greenhouse soils were also discussed.