摘要
亚高山草甸的地上生物量产出及营养状况对于草场的季节性放牧具有重要意义。通过调查及分析发现:1)小五台的亚高山草甸的地上生物量产出总体来说是随着海拔的升高而增加,并且与物种多样性有很好的相关关系,其形成主要受近地面温度及土壤养分条件的影响。2)CCA(典范对应分析)排序结果表明,对小五台植物营养成分含量影响较大的环境因子是温度、太阳辐射和土壤养分及水分含量。3)从牧场利用的角度来看,草甸植物的纤维和热值含量高,海拔增加植物中粗蛋白的含量也随之增加,体现出高寒植物的特点;就放牧而言,阴坡的植物营养要好于其他坡向,但草甸中豆科植物相对缺乏,需要适当补充。
Based on the fieldwork and quantity analysis, the relationships of herbage yield and nutritive value between selected environmental factors in the subalpine meadow of Mr. Xiaowutaiwere studied. The main results are shown as follows;1） Herbage yield increased with elevation from 2 200 m to 2 600 m and then declined until 2 800 m, which showed high correlation with the species diversity, and the effective temperature and soil nutrition content could partly explain the result; 2） The Canonical Correspondence Analysis suggested that the amount of heat and soil organic content, also with soil wetness index inflected the quality of meadow in Mr. Xiaowutai; 3） Most of the plants improved their cold-resistance and adaptability to stressful environments by increasing CP, fiber content and caloric value. For grazing, the quality of plants in shady slope was better than that of others, but leguminous plants were inadequate to meet the needs of grazing cattle for growth.
出处
《草业科学》
CAS
CSCD
2008年第11期5-12,共8页
Pratacultural Science
基金
国家自然科学基金资助项目(40571001和40371043)
云南大学理(工)科校级科研重点项目(2005Z005B)
云南大学中青年骨干教师培养计划(W33020000)
