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黑龙江省大部分地区属于季节性干旱地区,年降雨量虽在500—700毫米,但雨量分布不均,冬季(11—4月)的降水只占全年降水的10—15%,而60—70%集中在在6、7、8三个月份。在土壤水分消长过程中,大气蒸发是引起土壤失水的外部原因,而人们运用耕作方法创造耕层构造则是(在一定范围内)决定土壤水分如何变化的内部条件。因此,通过耕作技术,防旱保墒是创造高产稳产的一个重要技术措施。几年来,在海伦县东风公社保
Most of Heilongjiang Province is a seasonal arid region with annual rainfall of 500-700 mm, but the rainfall is unevenly distributed. The precipitation in winter (November-April) only accounts for 10-15% of the annual precipitation, while the precipitation in 60- 70% concentrated in 6,7,8 three months. Atmospheric evaporation is the external cause of soil water loss in the process of soil moisture growth. However, the use of farming methods to create tilth plow structure is (within a certain range) the internal conditions that determine how soil moisture changes. Therefore, through farming techniques, drought and soil moisture is an important technical measure to create high and stable yield. In recent years, Hefeng County, Dongfeng commune security