【摘要】 金沙江干热河谷植被恢复的主要障碍是土壤干旱和以有机质为主的养分缺乏,由此造成人工植被成活率低或生长不良。针对这一因子,借鉴国内外干旱地区微区集水技术经验,结合金沙江干热河谷退化山地年均降雨600mm左右,地方乡土草黄茅(Heteropogoncontortus)人为目的干预下生长良好的实际,设计了山地径流塘-草网络技术。试验研究表明:径流塘-草网络技术具有固土稳水功能,可增强乔木树微区环境土壤抗蚀性能,改善以有机质为主的养分条件及树根区的土壤水分条件,致使研究区内的乔木经济树种酸角(Tamarindusindica)及黄茅生长均超过对照;该技术操作简单,成本低,可在山地退化环境植树种草,发展经济林果中应用。更多还原

【Abstract】 Severe water deficit and the lack of organic matter of soils are the main obstacle to the revegetation on degraded hill areas in the hotarid valley region of Jinsha river, resulting in the lower plant surviving and bad growing of vegetation. With the purpose to relief this problem, experiences of microrunoff skills are used for reference in this study. We designed a twotier runoff interdiction wall with low earth bank and native grass (Heteropogon contortus) belt net to prevent water and soil loss a Tamarindus indica orchard. After three years, erosion resistance of the soil was enhanced; soil condition was markedly ameliorated, especially on soil organic matter quantity and soil water condition of root system zone. As a result, in such orchard, both tamarind tree and native grasses grown much better than that of in contrast orchard. The result indicates that this technique poses a significant efficiency of runoff interdicting, soil keeping and soil organic matter producing. With the remarkable profits, low import and simple operation process, this technique is suggested to be applied for economic trees reconstruction on the deteriorated hill area in hotarid region of Jinsha river.更多还原