南方山丘水库种草养鱼防淤减积综合利用的研究

A study on supplying fish feed and preventing silt sinking in reservoirs by planting grasses in southern China

在长沙县百倍冲水库进行多年的试验研究结果表明,开发利用库内长期荒芜的大片消落区种植黑麦草;荒山堤坝上种植扁穗牛鞭草、岸杂一号狗牙根、皇草、幼林间种植鸡脚草、拉丁鲁白三叶等饲草配套养鱼和防止水土流失、防淤减积试验获得成功。库内鲜鱼产量由种草前常年1000kg提高到7000～8000kg,泥砂淤积量每年减少0.516×104m3,经济生态效益显著。

To solve the problems existing in reservoirs of southern hilly areas of China,such as long-term shortage of fish feed,low fresh fish yield,serious soil erosion and large amount of silt sinking,experimental researches were conducted recently in Baibeichong reservoir of Changsha county.The study aims at supplying feed for fish,con serving water and preventing soil erosion and sinking of silts in the reservoir by planting Lolium xhybridum Hausskn in the beach,Schunach,Coastcross-1bermuda grass and King grass in barren hills,and interplanging Dacttylis glomerata L.and Ladino Trifolium repens L.with young trees.The results indicated that the annual output of fresh fish in the reservoir was increased from1000kg to the current 7000～8000kg,volume of silts was decreased by5160m 3 ,and significant economic and ecological effects were obtained in the study area.