鸭茅╋白三叶型混播放牧草地肉牛生产系统优化研究

在鸭茅（Dactylis glomerata）+白三叶（Triflium repens）草地型肉牛放牧系统内，实施全日制划区轮牧、载畜量季节性调控、维持肥施用、草地除杂、枯草期补饲等优化措施，对草地的土壤养分、牧草生长强度、现存量、组分、养分及肉牛体质量、日增体质量等指标进行了监测。结果表明，采用全日制放牧，在草地年平均载畜量1.4牛单位/hm2下，牧草的生长量超过8 077 kg/hm2，肉牛体况得到明显的改善，单位草地面积经济效益可达1 135元/hm2，草地实现可持续利用。同时，针对草地肉牛放牧系统中存在的问题，提出了有效改进的合理化建议。

Optimizing the producing system of beef cattle grazing on mixture pasture of cocksfoot and white clover

A series of measurements were used to optimize the producing system of beef cattle grazing on mixture pasture of cocksfoot and white clover,and these measurement included 24 hours' rotation grazing,seasonal adjustment of stocking rate,sustainable application fertilizer,weed,fodder supplementary.The soil nutrients,intensity of pasture growth,standing biomass,component,nutrients,weights and daily gain of beef cattle were monitored in the process of experiment.The results of this study showed the beef cattle w...