摘要
青藏高原高寒灌丛生态系统生物量分配的研究相对较少,尤其是其草本层。为了探究高寒灌丛生态系统草本层生物量分配特征及其影响因素,分析了青藏高原东北部灌丛生态系统的49个高寒灌丛样地的草本层地上与地下生物量特征及其气候因子之间的关系。结果表明1)草本层地上生物量与地下生物量分别为121.1,342.8 g/m2均大于高寒草地的地上生物量与地下生物量。2)草本层的根冠比为3.6低于高寒草地的根冠比。3)地上生物量与地下生物量之间呈现幂函数的关系y=8.0x0.83(R2=0.48,P<0.001)。4)根冠比与年均温度、年均降雨量之间没有显著的相关关系。
Our objectives were to explore relationships between above-and belowground biomass and their allocation relationship with climatic factors in the grass layer in shrub ecosystems on the Tibetan Plateau. We analyzed the allocation relationship and their influencing factors on the root/shoot biomass ratio at 49 sites. The mediam values of above-and belowground biomass in the shrubland ecosystem grass layer on the Tibetan Plateau were 121. 1 and 342. 8 g/m2 respectively, and they werehigher than that in the Tibetan grasslands. The medium value of root/shoot biomass ratio in the shrub ecosystem grass layer on the Tibetan Plateau was 3.6, which was lower than that in the Tibetan grasslands. The relationship between above-and belowground biomass can be described as a power function： y = 8.0x^0.83 （R2 = 0.48, P〈 0.001 ）. The root/shoot biomass ratio was stable with both mean annual precipitation and mean annual temperature.
作者
聂秀青
熊丰
李长斌
杨路存
肖元明
周国英
NIE Xiuqing;XIONG Feng;LI Changbin;YANG Lucun;XIAO Yuanming;ZHOU Guoying(Northwest Institute of Plateau Biology,Chinese Academy of Science,Key Laboratory of Tibetan Medicine Research,Chinese Academy of Sciences,Xining 810008,China;Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources,Xining 810008,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《生态学报》
CAS
CSCD
北大核心
2018年第18期6664-6669,共6页
Acta Ecologica Sinica
基金
国家科技性工作专项(2015FY11030001-5)
中国科学院战略先导科技专项(XDA0505030304)
国家科技支撑计划项目(2014BAC05B01)
关键词
草本层
根冠比
地上生物量
地下生物量
气候因素
青藏高原
grass layer
root/shoot biomass ratio
aboveground biomass
belowground biomass
climatic factors
the Tibetan Plateau
