结果表明，林地的土壤含水量和蒸散量与冬季降水量相关，林木生长状况与土壤水分状况相关。
The result shows that the soil water content and evaporation amount of forest land has relations with winter rainfall, the forest growing state has relations with soil moisture state.
保水剂可有效抑制土壤水分蒸发，使土壤在较长时间内维持较高的土壤含水量。
Three polymers can reduce effectively the soil water evaporation, making soil maintain much amount of water in longer period contrary to the control.
结果表明：一天中叶水势值与土壤水分状况密切相关，叶水势与土壤含水量呈正相关，回归方程为变形双曲线；
The results showed that there was a close relation between leaf water potential and soil moisture during a day.
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