红壤旱地绿肥牧草周年茬口优化和利用探讨

根据我省畜牧业生产中存在青饲料不能均衡供应问题而设计本试验。经3年小区定位试验和大田示范结果表明,无论从牧草的产量和品质抑或改土效应和经济效益等方面来综合衡量,均以墨西哥玉米-箭舌碗豆茬口形式较好,达到和超过农业部下达的下列主要技术经济指标:(1)年周期亩产青草1万公斤以上;(2)粗蛋白含量18-20％。象草具有高产优势和抗旱性强的特性,故象草-黑麦草茬口形式适宜红壤无灌溉条件地区采用。

The Utilization and selection for Annual Rotation of Creen Forage in Red Earth Dry Land

This experiment was desighed on unbalance cf fresh fodder of animal production in Jiangxi. Showed by the results cf field demenstration and 3yr's Iccation experiment, the rotation cropping cf Zea mays subsp. mexicana Common Vetch was better than that of oth- ers in either yield and quailty of grass, or improvement of soil and benefit of agricultural (1) fresh grass yield over 10 thousands kg per mu per yr; (2) the content of crude protein 18-20%. Because elephant grass has advantage in high yield and drought resistance, so elephant grass-rysgrass rotation cropping will be suitable to unirrigation red soil.