5157.2 20042351治理长江上游水土流失的对策=Countermeas盯eof watera一记5011 erosion in upPer reaehes ofChangjiangRiver/辜胜阻,侯伟丽//长江流域资源与环境.一2()00,9(2)一260~264参5(宋金叶) HN5151.9 20042352小区域水平土壤有机质动态变化的评价与分析=Analysis and evaluation of 5011 organie matterdynamics at a little region seale/李忠佩,王效举//地理科学一2000,20(2)一182~188图2表