金露梅灌丛地下生物量形成规律的研究  

Study of formation pattern of below-ground biomass in Potentilla fruticosa shrub

作　　者：周华坤[1] 周立[1] 赵新全[1] 沈振西[1] 李英年[1] 周兴民[1] 严作良[1] 刘伟[1] 

机构地区：[1]中国科学院西北高原生物研究所,西宁810001

出　　处：《草业学报》2002年第2期59-65,共7页Acta Prataculturae Sinica

基　　金：中科院海北高寒草甸生态系统定位站基金 (编号 :1 1 0 2 0 1 665);中国生态系统研究网络长期监测项目和国家重点基础研究专项经费 (G1 9980 4 0 80 0 )资助

摘　　要：对金露梅灌丛地下生物量形成规律的研究结果表明 :金露梅灌丛地下生物量具有“V”字形季节变化规律和明显的垂直分布特征 ;金露梅灌丛死根和活根的生物量变化有显著的季节变化规律 ;金露梅灌丛草场地下生物量的周转值为 35 .72 % ,地下净生产量为 12 0 6 .4 g/ m2 ;金露梅灌丛地下生物量与地上生物量、总生物量的比值接近于生长季始末时最大 ;The formation patterns of below ground biomass was analyzed in Potentilla fruticosa dominated shrub. The results showed that the below ground biomass of Potentilla fruticosa shrub obeyed the pattern of 'V' type and had obvious vertical distributive characteristics. The biomass of dead and living root showed obvious seasonal changing laws. The turnover value of below ground was 35.72% and the below ground net production was 1 206.4 g/m 2. The proportion of below ground biomass and above ground biomass was higher at the beginning and ending growing season as well as with total biomass. The negative correlation was showed between below ground biomass and average air temperature or precipitation monthly.

关 键 词：金露梅灌丛 地下生物量 形成规律 

分 类 号：Q945.79[生物学—植物学]