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| Research on root distributing and its effects of protection forest of the Yellow River bank |
| Zhang Qiang1,Yu Weiping2,Sun Xiangyang1,Ma Hui2,Wang Han2,Zhang Hao3,Wei Yaofeng3 |
| 1.Key Lab.of Soil & Water Conservation and Desertification Combating,Ministry of Education,Beijing Forestry University,100083,Beijing;2.Ningxia Forestry Institute;3.Ningxia Forestry Bureau: 750004,Yinchuan: China |
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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.
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Received: 16 May 2006
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