【摘要】 土壤有机质质量分数是影响土壤斥水性的最主要因素之一,为研究二者之间的关系,选用以色列3类不同质地斥水性土壤为对象,分别在田间和实验室测定土壤斥水性和有机质质量分数,并绘制土壤斥水性和有机质质量分数的等值线图和关系图。结果表明,对于粘性土壤和沙质土壤,土壤斥水性随有机质质量分数成幂指数关系,但对于壤土,二者之间没有非常明显的线性关系。研究结果可为分析不同土壤的斥水性影响因素和土壤改良提供理论依据。更多还原

【Abstract】 Soil organic matter is the main factor of soul water repellency.This paper got the contour of Water Drop Penetration Time(WDPT) for three kinds of soils namely clay,loam and sandy soil,by measured WDPT in the field and soil moisture and organic matter in the lab.Meanwhile the relationship between WDPT and soil organic matter was got by measuring WDPT after drying soil samples 65 ℃ for clay and sandy soil in the lab.The results show that the relationship between WDPT and organic matter shows difference between soils.It is a power correlation for clay and sand and no linear correlation for loam.It can provide the theory for the factors of soil water repellency and soil amelioration.更多还原