摘要
根据１９８５～１９８８年四年的动态监测资料，研究分析了人工草地土壤水分的动态变化规律．结果表明：表层土壤的水分含量波动剧烈，对降水反应迅速，主要受大气降水的影响．０～４０ｃｍ土层的水分含量从生长季初期到７月下旬逐渐减少，随后开始回升，其波动情况除受大气降水的影响以外，还与植物的生长发育节律及根系吸水有密切关系．下层土壤水分含量波动幅度较小，有比较明显的滞后现象，在整个生长季中表现出“Ｕ”形曲线的变化特点．
The state of soil moisture is one of the key factors thatdetermines the success of establishing artificial grassland in steppe region. Based on dynamic monitoring data of four years,a study on the dyamic rules of soil moisture in artificial grassland is made. The results show,that the water content of surface soil fluctuated violently, and responded rapidly to rainfall, which was mainly affeted by precipitation. The water content of soil layer between 0 to 40 cm gradually reduce from the beginning of growing season to the last ten days of July, then goes up. Besides the influence of precipitation, its fluctuation has a close relationship with the growing and developing rhythm of plants and the absorbing of water by roots. The water content of deeper soil layer fluctuated slightly and has obvious hyteresis. Its content in the whole growing season forms a 'U' curve.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
1996年第2期237-241,共5页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家自然科学基金
关键词
人工草地
土壤水分
动态规律
artificial grassland soil moisture dynamic rule
