放牧强度对牧草再生性能的影响

在华北农牧交错带地区研究放牧强度对3种人工草地再生性能的影响.结果表明,无芒雀麦和新麦草的再生性能最好,杂花苜蓿次之,扁穗冰草最差.放牧强度不同牧草的再生性能各异,其中新麦草和无芒雀麦在重牧区再生草产量最高,而杂花苜蓿和扁穗冰草则在轻牧区最高.牧草的再生性能与放牧季节有关,第1次放牧后的再生性能高于第2次.

Effects of Different Grazing Intensities on the Regrowth Characteristics of the Herbage

The research was about the effects of the different grazing intensities on the regrowth characteristic of the herbage in the border of crop and range regions in north China.The results were:The regrowth speed and yield of smooth bromegrass and Russian wildrye were highest,of alfalfa was lower and of crested wheatgrass was the worst of them.The regrowth yield of Russian wildrye and smooth bromegrass was highest under heavy grazing.However,the regrowth yield of alfalfa and crested wheatgrass was higher under light grazing.The regrowth characteristic of the herbage was related with the regrowth season,which was higher in the first grazing period than that of the second.