干热河谷水电站弃渣场植被恢复技术研究

金沙江干热河谷水电站弃渣场采用保水保肥措施的植被恢复试验研究表明，弃渣场土壤采用保水剂＋保水缓释肥处理同其它对照相比，获得的效果最好．该处理可以促进新银合欢生长发育，提高旱季成活率．同空白处理相比，株高增长率、枝数增长率、最大叶面积增长率可分别达到32．74％、23．86％和11．51％×14．58％（长×宽）；平均单株重增加53．49％；叶绿素含量增加达7．88％；旱季成活率为94．97％．保水剂＋保水缓释肥处理在干热河谷水电站弃渣场植被恢复中具有一定的应用价值．

A Study on Vegetation Restoration Technology of Abandoned Dreg Site of Hydropower Station in the Dry-hot Valley Areas

Research on the measures to conserve soil water and nutrient in the dry-hot valley areas was conducted in order to realize the vegetation restoration of abandoned dreg site of hydropower station. The experiments indicated that soil in the abandoned dreg site with water retaining agent + water-retaining and slow-released fertilizer could achieve the best effect in compasion with the control. The treatment could stimulate the growth and development of Leucaena leucocephala and improve its survival rate in dry season.The increasing rate in plant height, average leaf number, most leaf area, single weightiness and chlorophyl content increased by 32.74%, 23.86%,11.51%×14.58%(length×breadth), 53.49% and 7.88% compared with CK. The survival rate of Leucaena leucocephala in dry season increased by 94.97%. The disposals of water retaining agent + water retaining and slow-released fertilizer have certain application value in vegetation restoration of abandoned dreg site of hydropower station in the dry-hot valley.