摘要
1988～1989年期间在河北省土肥所旱地上研究了少、免耕对土壤物理性质的影响,结果表明,少、免耕能增加>0.25mm水稳性团聚体的含量,提高>0.05mm微团聚体含量,比水容量降低,并且少、免耕又有效地降低了大、中孔隙含量,增大了微小孔隙含量,使气相容气度降低,土壤容量增加,总孔度减小,但少、免耕的毛管孔隙度随时间和空间的变异较小,有相对的稳定性。
This paper deals with the effect of Zero tillage and minimum tillage on physical properties of soil in the current planting system.Zero tillage and minimum tillage can increase>0.25mm water stable aggregates and>0.05mm micro aggregates, but the soil specific water capacity decrease. Therefore, zero tillage and minimum tillage have good ability to maintain soil moisture and resist droughts, decreasing coarse pore volume and total porosity while increasing micro and small pore volume and soil bulk density. But the variation of the capillary pore volume with time and space is small and has the relative stability.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1992年第2期28-33,共6页
Journal of Hebei Agricultural University
关键词
旱地
少耕
免耕
土壤
物理性质
dryland
zero tillage and minimum tillage
water stable aggregate
specific water capacity
bulk density
porosity
