The results showed that the content of chlorophyll and photosynthetic rate were decreased with soil water decreasing.
结果表明：光合速率和叶绿素含量均随土壤水分的减少而呈下降趋势。
The only input factors of the simplified model were soil radium content, dry bulk density, water content and soil texture type and the output was soil radon exhalation rate.
模型只需输入土壤样品镭含量、容重、质量含水率和质地名称，就可以输出该样品的氡析出率理论值。
As the radius distances and soil layer depth increased, water content of soil will be lessened, and the rate of level reducer decreased as the soil depth increased.
土壤含水量随土层深度和径向距离增大而递减，径向递减率随土层深度增大而减小。
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