干旱区研究2013，Vol.30Issue(1)：109-114,6.
小针茅草原植被地下与地上生物量季节动态及根冠比变化规律
Study on Seasonal Variation of Aboveground and Underground Biomasses of Vegetation in the Stipa klemenzii Steppe and Their Ratio
摘要
Abstract
In this paper, the aboveground and belowground biomasses and root-shoot ratio of vegetation in the Stipa klemenzii steppe in Sonid Right Banner, Inner Mongolia were analyzed based on the data of aboveground and underground biomasses of vegetation in the steppe in growing season, and seasonal dynamic variation models of root-shoot ratio of vegetation were developed. The results are as follows; (1) The curve of aboveground biomass of vegetation in the S. Klemenzii steppe in 2011 was remarkably unimodal, the peak value was 46. 14 g · m-2 and occurred in late June. The curve of seasonal dynamic change of underground biomass was N-shaped, the peak and lowest values occurred in late July and late August, and their values were 1 275. 46 g · m-2 and 365. 1 g · m-2, respectively. The peak value of underground biomass occurred one month later than that of aboveground biomass; (2 ) The root-shoot ratio of vegetation in the 5. Klemenzii steppe in 2011 was fluctuated seasonally, the lowest value ( 16. 8) and the highest value (51. 05) occurred in late August and late July respectively; (3) There was a significant correlation between the aboveground biomass and the root-shoot ratio in 2011, in which the correlation in August was the highest, and the correlation coefficient was as high as 0. 626, so the aboveground biomass in August could be used to simulate the variation of root-shoot ratio of vegetation in the S. Klemenzii steppe.关键词
小针茅草原/生物量/根冠比/季节动态/苏尼特右旗/内蒙古Key words
Stipa klemenzii steppe/ biomass/ root-shoot ratio/ seasonal dynamic change/ Sonid Right Banner/ Inner Mongolia引用本文复制引用
杨婷婷,高永,吴新宏,李鹏,石红霄..小针茅草原植被地下与地上生物量季节动态及根冠比变化规律[J].干旱区研究,2013,30(1):109-114,6.基金项目
中央级公益性科研院所基本科研业务费专项资金(中国农业科学院草原研究所)项目资助(1610332012212) （中国农业科学院草原研究所）
