土壤水分变化 Soil moisture variation ; Soil water change
农田水分变化 Dynamic change of soil moisture
周年水分变化 annual moisture variation
土壤水分变化规律 Soil moisture regulation
土壤水分变化特征 Variation characteristics of soil moisture
土壤水分变化动态 soil water changing development
土壤渗漏水养分变化 Nutrient change of soil percolating water
土壤水分动态变化 Dynamics of soil water content
结果表明； 天气条件的变化是大气水分变化的主要原因。
The result shows that the weather change is the main reason of the atmospheric water content change.
研究黄土高原土壤水分变化规律，有着极其重要的科学和实际意义。
That has practical and scientific significance to study the dynamic law of soil moisture.
气体交换和资源利用效率对水分变化的响应格局因生理指标不同而存在差异。
The patterns of the responses of the gas exchange and resource use efficiency to water change varied with various physiological indices.
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