拉萨河谷山地灌丛草地优势种营养物质含量变化规律

发布时间：2018-06-09 23:09

本文选题：西藏 + 山地灌丛草地　；参考：《中国草地学报》2017年03期

【摘要】：对拉萨河谷不同海拔山地灌丛草地优势种营养物质含量的变化规律进行了研究,结果表明:优势种营养物质含量随海拔高度的增加而变化,高山嵩草、白尖苔草的粗蛋白质含量最高,丝颖针茅的中性洗涤纤维、酸性洗涤纤维含量最高,但其粗蛋白质和可溶性糖含量在6种优势种中最低,雪层杜鹃、樱草杜鹃的可溶性糖含量最高、但其灰分、粗脂肪含量最低,喜马拉雅草沙蚕的灰分含量最高。随海拔高度的增加,山地灌丛草地优势种的中性洗涤纤维、酸性洗涤纤维和灰分含量降低,可溶性糖含量随海拔升高而增加,粗脂肪含量随海拔升高呈先升高后降低的"单峰曲线"变化趋势,而粗蛋白质含量呈先降低后升高的"U"型变化趋势。
[Abstract]:The changes of nutrient content of dominant species of shrub grassland at different altitudes in Lhasa Valley were studied. The results showed that the nutrient content of dominant species varied with the increase of altitude, Kobresia alpine, Kobresia alpine, and Kobresia alpine. The content of crude protein of Carex albicans was the highest, the content of neutral detergent fiber and acid detergent fiber was the highest, but the contents of crude protein and soluble sugar were the lowest among the six dominant species, the snow layer rhododendron. The content of soluble sugar in Rhododendron was the highest, but its ash content and crude fat content were the lowest, and the ash content of Himalayan silkworm was the highest. With the increase of altitude, the content of neutral detergent fiber, acid detergent fiber and ash of dominant species in mountain shrub grassland decreased, and the content of soluble sugar increased with elevation. The crude fat content increased at first and then decreased with the elevation, while the crude protein content decreased first and then increased.
【作者单位】：中国农业科学院草原研究所/农业部草地生态与修复治理重点实验室;西藏农牧科学院草业科学研究所;山东大学(威海)海洋学院;中国科学院地理科学与资源研究所;
【基金】：国家自然科学基金项目(31402119) 西藏自治区科技成果转化/示范项目中科院科技服务STS计划课题(KFJ-EW-STS-072) 中央级公益性科研院所基本科研业务费专项(1610332016015)
【分类号】：S812

【相似文献】