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近年来,随着种植业结构的调整,蔬菜已成为杭州市种植业第一大产业。为提高蔬菜经济效益,棚栽蔬菜面积逐年扩大,但由于棚栽蔬菜环境特殊,常出现土壤返盐现象,影响蔬菜的正常生长和产量的提高。我们于2001年夏季对余杭乔司,萧山宁围、城北一带大棚蔬菜地土壤进行了现场调查并采集土壤样品,测定了土壤理化性状。现将大棚蔬菜地土壤返盐症状及预防措施简述如下。1.症状据调查,蔬菜地土壤连续搭棚覆盖塑料薄膜在3
In recent years, with the adjustment of planting structure, vegetables have become the largest planting industry in Hangzhou. In order to improve the economic efficiency of vegetables, the area of greenhouse vegetables has been expanding year by year. However, due to the special environment of greenhouse vegetables, soil return salt often appears, which affects the normal growth of vegetables and the increase of yield. In the summer of 2001, we conducted on-site surveys of the soil of greenhouse vegetables in Yuhang Qiao Si, Xiaoshan Ningwei and the north of the city and collected soil samples, and determined the physical and chemical properties of the soil. The greenhouse vegetable soils back to the salt symptoms and precautions are outlined below. 1. Symptoms According to the survey, vegetable soil scaffold covered plastic film in a row 3