摘要
在南方人工草地上,采用跟踪观察法和齐地刈割法,研究了不同月龄贵州黑山羊的牧食行为和放牧前后牧草群落地上生物量的变化。结果表明:3月龄和15月龄山羊在牧食行为上存在明显差异,3月龄山羊的采食时间和游走站立时间均较15月龄的长(P<0.05),反刍卧息时间比15月龄的短(P<0.01),两种月龄的山羊不同放牧时间段的采食规律也不一样;3月龄羊放牧后各牧草品种的地上生物量与15月龄羊放牧后地上生物量存在差异,与3月龄贵州黑山羊放牧后的草地相比,15月龄羊放牧后鸭茅、多年生黑麦草和白三叶生物量显著减少(P<0.05),两种月龄的山羊都喜欢选择采食鸭茅和多年生黑麦草,而较不喜食白三叶;山羊的牧食行为对人工草地牧草群落地上生物量变化影响很大。
The grazing behavior of Guizhou black goats in different months on artificial pastures in southern China and changes of herbage biomass of the pastures before and after grazing were studied with the observation method of following goats and near ground cutting. The results showed that there were significant differences in grazing behavior between 3-month-old and 15-month-old goats, time of grazing and walking and standing of the former were longer than the later （P〈0.05）, while ruminant resting time was shorter（P〈0.01）, grazing rules in different grazing period were also different between 3-month-old and 15-month-old＇goats; there were differences in herbage biomass of different forage species between 3- month-old and 15-month-old goats, biomass of Dactylis glomerata, Lolium perenne and Trifolium repens significantly reduced（P〈0. 01） compared with the pasture where 3-month-old Ouizhou black goats were grazed, both of these goats prefer Dactylis glomerata and Lolium perenne to perennial Trifolium repens; grazing behavior of goats had significant effects on the changes of herbage biomass of artificial pastures.
出处
《中国草地学报》
CSCD
北大核心
2013年第3期67-71,共5页
Chinese Journal of Grassland
基金
国家现代肉羊产业技术体系专项(11004986)
公益性行业(农业)科研专项(201303145)
安徽省自然科学基金项目(1308085QC54)
关键词
南方人工草地
贵州黑山羊
牧食行为
牧草生物量
Artificial pastures in southern China
Guizhou black goats
Foraging behavior
Herbage biornass
