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本文研究了东北5种耕作土壤<1巴的低吸力段持水性能,包括影响低吸力段持水量的因素、所吸持水分对植物的有效程度、比水容量及脱水速度等。根据东北地区春旱尽管程度不同,但发生较为普遍的这一特点,分析、比较各种土壤基质本身存在的差异,并就它们对早期土壤干旱的抗逆能力作出评价。结果表明,熟化程度较高的草甸棕壤最优,而砂壤质冲积性草甸土最差。
In this paper, the water holding capacity of low suction section of <1 bar in five kinds of tillage soils in northeastern China was studied, including the factors influencing the water holding capacity in low suction section, the effective degree of water absorbed to plants, specific water capacity and the rate of dehydration. According to the fact that spring droughts in northeast China are different in degree, this phenomenon is more common. The differences among various soil matrices are analyzed and compared, and their resilience to early soil drought is evaluated. The results showed that the highest degree of maturity of the meadow brown soil, sandy alluvial meadow soil worst.