摘要
采用随机区组试验研究了内蒙古高原荒漠草原亚带短花针茅（Stipa brevi flora）草原群落不同载畜率对草原群落结构和功能群生产力的影响。结果表明：随着载畜率的增加，群落的植物种数逐渐减少，在每个载畜率水平下，冷蒿（Artemisia frigida）占有绝对优势地位，优势度为35．66％～41．95％；群落的地上生物量随载畜率的增加而降低，各功能群地上生物量组成中，灌木类处于主体地位，分别占据了群落68％（CK）、77．40％（LG）、73．25％（MG）、76．91％（HG）的生物量；在植物生活型功能组成中，灌木类和杂类草、多年生丛生禾草和杂类草功能群，在生物量上具有生态互补效应（niche complementary effect）。
Randomized blocks was adopted to study the effects of different stocking rates on the structures and functional group productivity of the communities in S. breviflora desert steppe in Inner Mongolia,and the results indicated that the number of community species decreased with increased stocking rates and Arternisia frigida absolutely dominated at various stocking rates with its dominances ranging within 35. 66%-41. 95%;the aboveground community biomass declined with increased stocking rates and in the aboveground biomass compositions of various functional groups,shrubs dominated,occupying 68% of the aboveground community biomass in the control, 77.40% of the aboveground community biomass under light grazing,73.25% of the aboveground community biomass under medium grazing and 76.91% of the aboveground community biomass under heavy grazing; in the functional group compositions of the life forms,the functional groups of shrubs and forbs,and mentary effect in biomass. perennial bush grasses and forbs had niche eomple
出处
《西北植物学报》
CAS
CSCD
北大核心
2006年第3期564-571,共8页
Acta Botanica Boreali-Occidentalia Sinica
基金
教育部"青年教师教学科研奖励计划"
国家自然科学基金项目(30060056
30360022)
内蒙古教育厅重点领域项目(ZL98005)
关键词
荒漠草原
载畜率
群落结构
植物功能群
desert steppe
stocking rates
community structure
plant functional group
作者简介
焦树英（1978-），女（汉族），在读博士，主要从事草地生态学研究。Email：jshysd@163．com
通讯联系人：HANGuo-dong．E-mail：nmghangd@hotmail．com
