摘要
以新疆天山北坡荒漠草地典型植物伊犁绢蒿为研究对象,利用多因素相关性分析,从构件水平对不同生境条件下伊犁绢蒿地上与地下生物量构件结构、地上与地下生物量生长规律进行研究,揭示气象因素、土壤因素与地上生物量和地下生物量的关系.结果表明:随着生境中水分和热量条件的改善,伊犁绢蒿构件生物量特征在察布查尔县和奇台县之间存在极显著差异(P<0.01);地上生物量主要受年均积温、年均降水量、土壤速效养分的正向影响,土壤总盐与地上生物量呈负相关,而地下生物量受年均积温影响较大;不同生境下构件组分对地上和地下生物量的分配率相似,地上都是茎>花>叶,地下都是主根>侧根>须根;地上和地下生物量随着茎干重和主根干重的增加而增加,其生物量与茎干重和主根干重有相同的物质生产和积累规律.
The paper discribed about biomass characters of Seriphidum transiliense modules in different habitats,using multi-factor pertinence analysis to find out the pertinence between weather factor,soil factor and aboveground,and between weather factor,soil factor,and underground.The results are as follows：It was a concrete embodiment of phenotypic variation for ecological adaptability that the biomass characters had varied of S.transiliense modules with the change of soil water and heat condition in different habitats,which has a significant difference between Chabuchaer County and Qitai County（P0.01）;The multi-factor analysis showed that annual mean accumulated temperature,annual mean precipitation,soil available nutrients were main positive factors for aboveground biomass,there was a reversed relationship between soil total salt and aboveground biomass.The main influence factor for underground biomass was annual mean accumulated temperature;They have a similar contribution law between aboveground biomass and underground biomass on modules in different habitats,it is stemflowerleaf in aboveground biomass,while it is main rootlateral rootfibrous root in underground biomass;We know from the growth law curve,there are similar material production and accumulation trend both stem dry weight and aboveground biomass,the same as main root and underground biomass.
出处
《西北植物学报》
CAS
CSCD
北大核心
2010年第7期1449-1457,共9页
Acta Botanica Boreali-Occidentalia Sinica
基金
教育部高等学校博士学科点专项科研基金项目(20070758002)
新疆草地资源与生态重点实验室开放课题项目(XJDX0209-2007-05)资助
关键词
伊犁绢蒿
生境
生物量
构件
Seriphidum transiliense
habitats
biomass
modules
