利用优质牧草改造低丘红壤侵蚀劣地的研究

为探索改造利用浙西低丘红壤侵蚀劣地的有效措施,引进牧草品种83个,进行小区对比试验和推广性中间试验,对其适应性、产草量、草质等指标进行综合评定,优选出一级品种8个,二级品种27个。试验表明,在侵蚀劣地上种植牧草,可减少地表径流量50％～60％,减少泥沙冲刷量60％～90％;连作三年黑麦草一年箭舌豌豆,试验区与空白对照区相比,有机质、全氮、全磷、全钾分别增加了326％、236％、94％、22％。五年来已在红壤侵蚀劣地推广种植优质牧草400余hm~2,净增产值60～100万元。

Study on Improving the Red Soil Erosive Inferior Land in Low Hills by Utilizing Fine Forage Grass

To explore effective measures for improving the red soil erosive inferior land in low hills in Zhejiang province, 83 kinds of forage grass were introduced for comparative tests and intermediate experiments for popularization. Through comprehensive judgement of their adaptability, output, quality and other indexes, 8 kinds of first grade, 27 kinds of second grade were selected. It is shown by the experiments that, by planting forage grass in the erosive inferior land, 50%~90% sediment erosion can be reduced; and by earring out crop rotation of peas and millets, the contents of organic matter, total nitrogen, total phosphorus, total potassium may increase by 326%, 236%, 94% and 22% respectively. More than 400hm2 fine forage grasses had been popularized in an area of 400km2 in the red soil evosive inferior land, with an output value of 600~ 1000 thousand yuan.