摘要
本文作者在南山牧场研究了在不同放牧制度和强度下奶牛对多年生黑麦草／白三叶人工草地植物种群密度的影响。结果表明，轮牧草地中多年生黑麦草、白三叶及杂类单的密度均比连续放牧高；随放牧强度增加和放牧时间延长，多年生黑麦草分蘖密度呈增加趋势，但株体变小，重量减轻；白三叶匍匐茎数以中等放牧强度最高，轻牧最低；杂类草的密度随放牧强度增加而减少。
The effect of graxing system and intensity for dairy cows on populationdensities of sward of perennial ryegrass/white clover were studied at Nanshan Farm, HunanProvince. It was showed that the densities for perennial ryegrass, white clover and weeds inrotational plots were higher than those in continuous plots .The tiller density of perennial ryegrassraised with the increase of grazing intensity and duration but its size and weight decreased, thestolon density of white clover were the highest for medium grazing intensity, and the lowest forlow grazing intensity. The densities of weeds were decreased with the increase of grazingintensity.
出处
《宁夏农学院学报》
1997年第1期11-15,共5页
Journal of Ningxia Agricultural College
