摘要
试验测定了不同有机质含量的沙地土壤饱和导水率、水分特征曲线及一些水分常数,研究分析了沙地土壤有机质含量与水动力学参数的关系以及有机质影响沙地土壤水分运动的机理。结果表明沙地土壤有机质含量与几个水分常数均呈极显著线性相关,土壤水吸力相同时有机质含量越高,土壤含水量也越大;土壤有机质含量和<0.01mm物理性粘粒与土壤饱和导水率呈极显著线性负相关,沙地土壤有机质是影响水分动力学参数最重要的因子之一。
By testing and analysing saturated water conductivity,water characteristic curve and water constants in sandy soi with different organic matter contents,the relationship between sandy soil organic matter and hydrodynamic parameters i; studied.The results show that there are linear relationships between sandy soil organic matter and water parameters: thf higher the soil organic matter content,the greater the soil water content under same soil water suction;there is a very remarkable negative linear relationship between the soil saturated water conductivity and the soil organic matter content anc <0.01 mm physical clay;the soil organic matter is the most important influence factor on soil hydrodynamic parameters ir sandy soil.
出处
《中国生态农业学报》
CAS
CSCD
2003年第1期74-77,共4页
Chinese Journal of Eco-Agriculture
基金
国家自然科学基金(39870643)
关键词
土壤水动力学参数
沙地
土训有机质
饱和导水率
水分特征曲线
水分常数
Sandy soil,Soil organic matter,Soil saturated water conductivity,Soil water characteristic curve,Soil water constants
