【摘要】 为更好地指导黄河防护林体系的建设,采用环刀法,对宁夏5种黄河护岸林的根系分布情况进行调查。结果表明:护岸林约有85%的根量分布在0~60 cm的范围内,是无林地即芦苇地根量的2~3倍;护岸林林地0~60cm范围内的土壤密度远远小于芦苇地的土壤密度,土壤饱和导水率较对照区有所提高;林地根量的增加,使土壤变的更加疏松、透气、透水,降低了土壤pH值,增加了土壤养分的来源,提高了土壤有机质和多种营养元素的含量,增强了土壤抵抗水土流失的能力。更多还原

【Abstract】 Root distribution and effects of soil melioration of several kinds of Yellow River bank protection forest were researched in order to direct the construction of protection forest of the Yellow River bank in Ningxia Autonomous region.There is about 85 percent of root biomass which distributes between 0-60 cm in the Yellow River bank protection forest.The root biomass is two to three times in protection forest than that in reed land.The soil density is much lower and the saturated hydraulic conductivity of soil is higher in bank protection forest than that in comparison area of 0-60 cm.The results showed that soil in woodland became more loose,value of pH was lower,quantity of organic matter and nutrition elements was higher.And the resistance on soil erosion was strengthened.更多还原