学术
不同放牧制度对老芒麦人工草地和羔羊体重的影响
毛培胜[1] 韩亮亮[1] 王新国[1] 张洪波[2]
[1]中国农业大学草业科学系,北京100094 [2]青海禾源草业科技开发有限公司北京分公司,北京100083
摘 要:
在河北省沽源县苏鲁滩牧场种植的老芒麦Elymus sibiricus人工草地上，研究划区轮牧、自由放牧对草地和当年公羔羊生产性能的影响。结果表明，放牧利用均可降低再生老芒麦植株的高度，放牧时间的长短对于老芒麦再生植株的高度具有不同影响。随着种植年限的增加，老芒麦草地植株密度下降明显，但放牧利用可以促进植株的分蘖和植株密度的提高。老芒麦草地产草量年际间变化较小，放牧利用后再生草产量有限。划区轮牧后羔羊体重均低于自由放牧，而且羔羊增重幅度差异显著（P〈0.05）。在老芒麦人工草地的放牧利用中难以体现划区轮牧的优越性。[著者文摘]
文章出处:
《草业科学》-2007年24卷11期 -66-69页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1001-0629（2007）11-0066-04
Effect of grazing system on Elymus sibiricus and Ram-lamb weight
MAO Pei-sheng , HAN Liang-liang , WANG Xin-guo , ZHANG Hong-bo （1. Grassland Science Faculty, China Agricultural University, Beijing 100094, China ; 2. Qinghai Heyuan Grass Development Ltd. Co. , Beijing 100083,China）
Abstract:
The experiment was conducted in the Siberian wildrye （Elymus sibiricus ） pasture planted in the Sulutan farm, Guyuan County of Hebei province. The objective was to study the effect of rotational grazing and continuous grazing on the performance of pasture and ram-lamb productivity. The results showed that of Siberian wildrye was decreased after both grazing, and grazing duration had different effects on the re-growth height. With the increase of stand age, plant density decreased apparently; however, grazing could promote tillering and plant density. Hay yield did not change much among the years, but the yield of re-growth was limited by grazing. Compared with free grazing, livestock weight was lower under rotational grazing. The live weight gain was also different significantly （P〈0.05）. Therefore, the superiority of rotational grazing could not be reflected in Siberian wildrye pasture.[著者文摘]
Key words:
Siberian wildrye; grazing system; artificial pasture; lamb; weight
基金资助:
农业部农业结构调整重大技术专项“人工草地肉羊繁育新技术与示范”（04-13-01A）;国家科技支撑计划“草地生态恢复与草畜平衡关键技术研究”（2006BAD16B01）
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