水分是土壤肥力的重要因素之一.河北省东部低平原有70%以上的耕地是缺少灌溉条件的旱地,土壤水分不足是发展农业生产的主要限制因素.研究非灌溉条件下的土壤水分运行规律,将为有效地保蓄自然降水,降低土壤水分的非生产性消耗,增加有效水储量,提高水分利用率提供科学依据.一、基本情况及研究方法试验在本所试验地上进行,并在南皮县刘八里设 Water is one of the important factors of soil fertility.With more than 70% of arable land in the low plain of the east of Hebei Province is arid land lack of irrigation, soil moisture is the main limiting factor in the development of agricultural production.Studies on the law of soil water movement under non-irrigation conditions , Will provide a scientific basis for effectively saving natural precipitation, reducing unproductive consumption of soil moisture, increasing effective water reserves, and improving water use efficiency.First, the basic situation and research methods Test in our test ground, and in the South Pi County Liu Bali set