摘要
以2010年1月21日发生于青藏高原亚高山草甸草地火灾的过火草地为对象,通过对比2010年生长季火烧与未火烧草地生产力及植物群落的变化,发现火烧后第1年草地生产力有不同程度提高,以高寒灌丛草甸线叶嵩草＋发草＋苔草草地增产影响最大（P〈0.05）。火烧对植物群落中的种类成分没有明显影响,但在各火烧草地牧草经济类群中,以占优势的莎草科植物呈现出明显的增产效果（P〈0.05）,说明火烧对根茎型莎草科植物起着刺激生长的作用。群落中禾本科植物产草量均有较大幅度下降（P〈0.05）,表明火烧对根茎型禾本科高草的叶层高度有明显的抑制。火烧对各类草地植物生长期产生不同的影响,牧草返青期提前15~25d,生长期延长。
This study was conducted on the sub-alpine meadow with fire disaster on 21st January,2010 in Qinghai-Tibetan Plateau.Measured the meadow production and vegetation community on burnt and unburnt 〈br〉 grassland,We found that the meadow production increased in the first years after burning,in prarticular on the meadow with Kobresia capillifolia ＋ Deschampsia caespitosa ＋ Carex sp （P 〈0.05）.The fire had no influence in the plant community composition,however,the yeild of sedge （Cyperaceae ）as the dominant species signfi-cantly increased （P 〈0.05）,which meaned that burning stimulated the growth of rhizome sedge.The yield of grass （Poaceae）decreased significantly after burning （P 〈 0.05 ）,indicating that burning retarded the grass＇ growth in length.Burning also affected the meadow plants during its growing season.The re-greening date was 15-25 days ahead of time in the early spring.
出处
《草原与草坪》
CAS
CSCD
2016年第2期82-86,共5页
Grassland and Turf
关键词
冬季火烧
青藏高原
亚高山草地
生产力和植物群落
burning
Qinghai-Tibetan Plateau
Sub-alpine grassland
production and plant community
