中国草食动物科学2013，Vol.33Issue(4)：36-38,3.DOI:10.3969/j.issn.2095-3887.2013.04.011
不同载畜量对南方人工草地生产性能的影响
Effects of Grazing Capacity on Pasture Production in Southern China
摘要
Abstract
Grazing capacity regulation is the main technical link of the grassland grazing system optimization.Three levels of grazing capacity,light grazing (L),medium grazing (M) and heavy grazing (H),were set on the model farm of Xiaoshao,Kunming,of which the grazing capacities were 0.74,1.52 and 2.24 AU(animal unit)/hm2 respectively.Each treatment had three grazing plots,the rotational grazing period was three months.The above-ground biomass,standing stock and nutrients of forage were determined in each month,the underground biomass were dertermined in June and October.The results showed as followed:Forage yield increased with the increase of grazing capacity,and the annual accumulation of forage DM in the three treatments were 8 667,9 486 and 10 264 kg/hm2; During the same period,the higher the grazing capacity,the lower the forage standing stock;During the withered period,the crude protein content of forage tended to decrease with the increase of grazing capacity,but the difference of crude fat content was small between the treatments; During the growth period,the crude protein,crude fat and other nutrients of forage were slightly different among the three treatments;The underground biomass of forage gathered mostly in the soil layer from zero to ten centimeters tended to increase with the increase of grazing capacity in October.The phenomenon of grassland degradation did not take place on rotational grazing plots with three different levels of grazing capacity.关键词
载畜量/放牧草地/生产性能Key words
grazing capacity/pasture / production performance分类
农业科技引用本文复制引用
吴文荣,金显栋,袁福锦,杨国荣,钟声,薛世明,黄必志..不同载畜量对南方人工草地生产性能的影响[J].中国草食动物科学,2013,33(4):36-38,3.基金项目
国家公益性行业(农业)科研专项(200903060) （农业）
