不同利用方式红壤坡地土壤水分分配及水肥流失研究

研究南方红壤坡地3种典型利用方式（休闲荒地、常规农作和茶园）的土壤水分分布特征及水肥流失情况。结果表明:①不同土地利用方式下的土壤水分含量变化与降雨量变化密切相关，土壤水分含量高低顺序为休闲荒地>茶园>常规农作。②常规农作产流不稳定，产流量明显高于休闲荒地和茶园，休闲荒地和茶园的产流无差异。③随径流损失的养分以氮素损失为主，养分损失量高低顺序为:常规农作>茶园>休闲荒地。从涵养水源、水土保持及经济效益综合考虑，南方红壤坡地利用以茶园利用为宜。

Effects of Different Utilization Model on Soil Water Redistributions,Runoff and Nutrition Loss on Red Sloping Lands

Effects of different utilization model on soil water redistributions, runoff and nutrition loss on red sloping lands of south China were studied.The results showed that: ① Changes of soil water content were related to rainfall significantly in red sloping land of different utilization model; Soil water content ranged as fallow land>farming land>tea garden.② Runoff of farming land fluctuated greatly and the amount of runoff were significant higher than fallow land and tea garden, and there were no difference on runoff between fallow land and tea garden.③ The amount of loss nutrition of farming land was the highest, and the main nutrition loss was nitrogen.From soil water keeping, low amount nutrition loss and to get economic benefit, the better utilization model of red sloping land of south China would be tea garden.