By equation of heat balance, heating effect of soil in greenhouse has been studied. Scientific basis have been provided to popularize and use greenhouse vegetable planting technology.
利用热量平衡方程探讨了温室内土壤的增温效应，为推广和应用温室蔬菜栽培技术提供科学依据。
The article investigates and analyzes the content of organic matter and cationic exchange of upper and under layer of soil planting vegetable of 14 villages in Chenggong county.
对呈贡县14个村的蔬菜土壤上下层有机质含量和阳离子交换量进行调查分析。
Results showed that other heavy metals contents were in safe level except Cd, which indicated that the soil in this region is suitable for vegetable planting.
调查结果表明，该区域内的土壤可以作为蔬菜基地使用。
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