五节芒等植物水土保持效果试验研究

选取香根草、象草和五节芒3种植物在中国南方红壤丘陵区山坡进行水土保持成效试验。对不同试验小区的土壤理化性状、径流量与水土流失量等指标进行了近3a的观测,结果表明,3种植物均有较好的水土保持效果。与香根草和象草相比,五节芒在增加地表覆盖,改善土壤理化性质,拦蓄径流泥沙,改良微地貌,防治水土流失,改善生态环境等方面具有明显优势,且分布广,种源多,种植成本低,是一种优良的水土保持草种。在南方红壤丘陵区水土流失治理生物措施中,可以优先选用五节芒。

Experimental Study of Miscanthus Floridulus on Soil and Water Conservation Effects

Three kinds of herbs Vetiveria zizanioides, Pennisetum purpureum Schum and Miscanthus floridulus were selected for an experiment of soil and water conservation in the red soil hilly region of Southern China. Observations of soil physiochemical properties, runoff and soil erosion were made in runoff plots for nearly three years. Results show that compared with Vetiveria zizanioides and Pennisetum purpureum Schum, Miscanthus floridulus has obvious advantages on increasing surface coverage, improving soil physiochemical properties, reducing and retaining surface runoff, improving micro-landform, controlling and reducing soil erosion, and improving ecological environment. Furthermore, Miscanthus floridulus are widely distributed, the seeds can be obtained easily, and the cost of planting is very low. Therefore, Miscanthus floridulus is a good grass for soil and water conservation. Miscanthus floridulus should be selected firstly in projects of soil and water conservation in the ed soil hilly region of Southern China.