【摘要】 为了实现干热河谷水电站弃渣场植被恢复,开展了弃渣场土壤保水措施研究。以膏桐和新银合欢为供试植物,对植被恢复试验小区土壤进行保水剂处理,并对其恢复效果进行监测。结果表明,弃渣场土壤采用保水剂处理,可以促进膏桐和新银合欢生长发育,提高旱季成活率。同空白对照相比,膏桐株高增长率、枝数增长率、最大叶面积增加率分别达到14.31%、17.46%和4.0%×4.76%(长×宽),平均单株重增加9.11%,叶绿素含量增加2.05%,旱季成活率为90.58%;新银合欢株高增长率、枝数增长率、最大叶面积增加率分别达到12.80%、9.09%和5.75%×4.16%(长×宽),平均单株重增加9.62%,叶绿素含量增加2.65%,旱季成活率为89.28%。更多还原

【Abstract】 Research on the measures to conserve soil water in the dry-hot valley areas is conducted in order to realize the vegetation restoration of abandoned dreg site of hydropower station.With Jatropha curcas and Leucaena leucocephala as the testing plants,soil in vegetation restoration plots is treated with water retaining agent,and the restoration effects are monitored.The experiments indicate that soil in the abandoned dreg site with water retaining agent can stimulate the growth and development of Jatropha curcas and Leucaena leucocephala and improve their survival rate in dry season in compasion with the blank and control.The increasing rate of Jatropha curcas in plant height,average number of leaf,most leaf area,single weightiness and chlorophyl content increased 14.31%,17.46%,4.0%×4.76%(length×breadth),9.11% and 2.05% compared with CK.The survival rate of Jatropha curcas in dry season could reach up to 90.58%.The increasing rate of Leucaena leucocephala in plant height,average number of leaf,most leaf area,single weightiness and chlorophyl content increased 12.80%,9.09%,5.75%×4.16%(length×breadth),9.62% and 2.65% compared with CK.The survival rate of Leucaena leucocephala in dry season could reach up to 89.28%.更多还原