青藏高原东缘草地生态系统动态定位监测与可持续发展要素研究 Ⅲ 8个重点草地类型植物优势种营养含量季节变化动态  

Studies on dynamics monitor and sustainable development in eastern edge of Qinghai-Tibetan alpine grasslandⅢ Seasonal variational dynamics of nutrional contents of the predominant plants on 8 main grassland types

作　　者：赵忠[1] 王安禄 马海生[1] 宋慧琴[1] 

机构地区：[1]甘肃省畜牧科技开发中心,甘肃兰州730030 [2]甘肃省碌曲县畜牧局,甘肃碌曲747200

出　　处：《草业科学》2002年第7期5-9,共5页Pratacultural Science

基　　金：甘肃省畜牧科技计划项目 (GMK2 0 0 1 12 )

摘　　要：分析研究了青藏高原东缘 8个重点草地类型的 8个优势植物种异针茅、金露梅、藏嵩草、珠芽蓼、高山柳、垂穗披碱草、窄叶鲜卑花、短柄草各个生育期粗蛋白质、粗脂肪、粗纤维和粗灰分等营养成分的含量。结果表明 ,牧草中各种营养成分的含量动态与生长发育阶段密切相关。粗蛋白质含量随生育期逐渐减少 ;粗纤维和粗灰分含量随着生育期逐渐增加。比较分析几种优势牧草和灌木的营养成分 ,发现灌木蛋白质含量高 ,利用价值大 。The contents of crude protein, crude fat,crude fiber and crude ash at various development stages of 8 predominant plants of Stipa aliena, Potentilla fruticosa, Kobresia tibetica, Polygonum viviparum, Salix cuplaris, Elymus nutans, Sibiraea angustata and Brachypodium sylvaticum in 8 main grassland types of eastern edge of Qinghai-Tibetan plateau were analyzed and studied. The results showed that the trend of nutrional contents was closely accorded with the growth and development stages.With the plant development, the crude fiber and ash were increased, but the content of crude protein was decreased. Compared the nutrient of dominant grasses and bushes, it was found that the bush contained more protein. So it had high feeding value and was a sort of important protein feeding resource.

关 键 词：青藏高原 草地 生态系统 动态定位监测 可持续发展 优势牧草 营养动态 生育期 东缘地区 

分 类 号：S812[农业科学—草业科学]