（三）、 土壤相对含水量(relative water content of soil) 在生产实际中常以某一时刻土壤含水量占该土壤田间持水量的百分数作为相对含水量来表示土壤水分的多少。
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The non-stomatal limitation play dominant role in decline of photosynthesis while relative soil water content is below 65% which could do harm to photosynthesis organ.
当土壤相对含水量低于65 %时，非气孔限制逐渐成为光合下降主导因子，并可能导致光合器官受到损伤。
On the basis of the experimental data in farmland, a function relationship between the potential evapotranspiration and the relative water content of the soil in the root zone was established.
以田间实验资料为基础，建立农田蒸散量和土壤相对含水量与潜在蒸散的函数关系。
The density, the relative content of water, soil type and the harvesting date influenced the allicin content in garlic bulb.
密度、土壤相对含水量、土壤类型及采收期都对鳞茎中大蒜素含量有一定的影响。
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