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水分是旱作农业高产稳产的重要限制因素。同样的降水量,由于土壤属性的差异,其抗旱涝能力是不同的。因此,搞清楚各土区的土壤水分状况和失调程度,对排灌工程的兴建次序,工程规模的确定和资金的投放是十分重要的。 本文基于对土壤水分动态系随机变量的认识,采用频率分析的方法对赵光地区耕作黑土23年的水分定位测定资料,并以小麦为例进行了统计计算,获得了不
Moisture is an important limiting factor for the high and stable yield of dry farming agriculture. The same precipitation, due to differences in soil properties, its ability to resist drought and flood is different. Therefore, to find out the status of soil moisture and the degree of imbalance in various soil areas, it is very important to establish the sequence of irrigation and drainage projects, the scale of the project and the allocation of funds. Based on the understanding of the random variables of soil moisture dynamic system, the frequency analysis method was used to determine the 23-year-long data of tillering soil moisture in Zhao Guang region, and the wheat was used as an example for statistical calculation.