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有关调查资料表明,我国蔬菜保护地土壤的次生盐渍化现象有逐年加重的趋势。多数使用年限在3年以上的蔬菜保护地土壤表层的盐分含量,均大于露地土壤表层的盐分含量,大棚土壤的含盐量在
The survey data show that the phenomenon of secondary salinization of vegetables in China’s protected areas have increased year by year trend. Most of the useful life of more than 3 years in the vegetable surface soil salt content, are greater than the exposed soil surface salt content, the greenhouse soil salt content in