杜鹃灌丛草地响应休牧的植被特征变化  

Changes of Vegetation Characteristics of Azalea Shrubland after No Grazing

作　　者：曹文侠[1] 张德罡[1] 徐长林[1] 师尚礼[1] 

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730030

出　　处：《中国草地学报》2008年第6期94-98,共5页Chinese Journal of Grassland

基　　金：甘肃省自然基金(3ZS041-A25-049);公益性行业(农业)科研专项(nyhyzx07-022)

摘　　要：初步探讨了不同休牧模式恢复杜鹃灌丛草地的地上生态过程。结果表明,全生长季休牧对灌丛草地灌木片层产生了积极影响,柳、鬼箭锦鸡儿和金露梅等饲用灌木的高度有明显恢复;苔藓和地面枯草存量增加,灌下微生境趋优;灌间草本群落高度、盖度和生物量有不同程度增加;不同休牧模式在生长季各阶段的表现存在差异,8月份草地禾草+莎草与杂类草的产草量之比:全生长季休牧、枯草期轻牧(全年1.67羊单位/hm2)为1.61,全生长季休牧、枯草期重牧(全年3.49羊单位/hm2)为0.73,对照为0.66,全生长季休牧草地的草群得到优化;枯草期高强度放牧也会影响杜鹃灌丛草地的生态恢复。The ecological processes of restoration to azalea shrubland under different no grazing patterns were studied. The results showed that no grazing in whole growing season had a positive effect on fodder shrubs, the height, coverage and biomass of herbage among shrub spaces increased in various degrees, and the composition of herbage has been optimized （gramineous ＋ sedge increased）; bryophyte community height and coverage increased significantly, litter layer were better preserved and function of water holding were improved; high--intensity grazing will also defer the shrubland ecological restoration.

关 键 词：杜鹃灌丛草地 休牧模式 生态恢复 植被变化 

分 类 号：S812.8[农业科学—草业科学]