摘要
对丘陵赤红壤水分性能变化的研究结果表明，与地带性自然植被下丘陵赤红壤比较，次生植被或人工植被下丘陵赤红壤水分性能变劣，表现在导水性降低，１２０ｍｉｎ饱和渗水量减少，自然赤红壤比耕型赤红壤的减幅大；持水能力下降，在同样吸水力下，土壤持水量较少；供水能力下降，在同样吸力段，表土释放的水量较少；亚表土在低吸力段释放水量较少。通径分析结果表明，养分贫瘠化，特别是贫有机质化，是丘陵赤红壤水分性能降低的主要内在因素。
The characteristics of water properties change in latored soils were discussed.Compared with the latored soils under zonal natural vegetation,soil water properties of ones under secondary or manmade vegetation were under deterioration.The results indicated that the water properties deterioration in latored soils was characterized by lowering of water infiltration rate in surface layer;of available waterholding ability,being less in holded available water under the same suction;of water supplying ability,being lessin release water content under same suction for surface layer or under lower suction for subsurface layer.Path analysical results indicated that the nutrients impoverishment expecially the organic matter deficient might be the main interior factor causing water properties deterioration of latored soils.
基金
中国科学院广州分院资助
广东省科学院院长基金
国家人事部非教育系统留学回国人员科技活动择优资助
