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根据对屯留试验区旱地冬小麦农田水分的系统观测和分析研究,得出农田水分动态的时间变化和垂直分布的基本规律和特征值。其农田水分具有周年恢复、明显的干湿变化和季节性干旱、活动层次深厚、土壤水分库容量大等特点,从土壤—植物—大气系统水分亏缺的年变化和分布规律分析,生育期水分供需的极不协调,特别是生育关键时期的天气干旱和土壤水分的亏缺,则是影响冬小麦生长发育的主要限制因素。
According to the systematic observation and analysis of the winter wheat farmland moisture in the dryland of Tunliu Experimental Area, the basic laws and eigenvalues of the temporal variation and vertical distribution of the farmland moisture dynamics were obtained. The cropland water has the characteristics of annual recovery, obvious changes in dry and wet, seasonal drought, deep activity level and large capacity of soil water storage. From the analysis of annual variation and distribution of water deficit in soil-plant-atmosphere system, The extremely uncoordinated supply and demand, especially the weather drought and soil water deficit in the critical period of fertility, are the main limiting factors affecting the growth and development of winter wheat.