摘要
本文以湖南省会同县广坪镇杉木基地Ⅱ号集水区19年生杉木林为研究对象,研究了杉木不同器官与土壤之间的化学计量间的相关关系。结果表明,杉木不同器官与土壤N元素含量的规律是凋落物>叶>根>枝>土;P含量表现出来的规律为凋落物>根>枝>叶>土;N∶P比值表现出的规律是凋落物>叶>根>枝>土;枝和凋落物的N含量与土壤的N含量呈现出不显著的正相关关系,根的N含量与土壤的N含量呈现出负相关关系,叶的N含量与土壤的N含量存在极显著的负相关关系;枝、根、叶、凋落物的P含量与土壤的P含量均呈现出不显著的正相关关系;枝的N∶P比值与土壤的N∶P比值之间呈现出负相关关系,根、叶、凋落物的N∶P比值与土壤的N∶P比值之间均呈现出正相关关系;土壤的N含量与杉木叶片的P含量之间呈现出显著的正相关关系,与杉木叶的N∶P比值之间呈现出极显著的负相关关系。通过对杉木不同器官与土壤的N、P元素含量以及化学计量间相关关系的研究,我们发现土壤的N元素很有可能成为该地杉木生长的限制性因子。该研究结果可为杉木林的功能高效、稳定和可持续发展提供一定的科学依据。
To reveal the stoichiometry of Cunninghamia lanceolata forests and the relationship of different organs and soil paraments, this paper takes 17 years Cunninghamia lanceolata forests as the research object in II watershed Guangping village Huitong county Hunan province. The results showed that litter had the most N concentrations, the next was leaf, the third was root, branch was the fourth, soil was the last. Litter had the most P concentrations, the next was root, the third was branch, leaf was the fourth, soil was the last. The N：P ratios had the same rule as the N concentrations. Branch and litter N concentration was positively correlated with soil N concentration, Root N concentration was negatively correlated with soil N concentrations. Leaf N concentration was extremely negatively correlated with soil N concentrations. Branch, root, leaf and litter P concentration was positively correlated with soil P concentration. Branch N：P ratios concentration was negatively correlated with soil N：P ratios. Root, leaf and litter N：P ratios was positively correlated with soil N：P ratios. Soil N concentration was extremely positively correlated with leaf P concentrations, and was extremely negatively correlated with leaf N：P ratios. By the research of the N and P concentrations and their stoichiometry features of Cunninghamia lanceolata different organs and soil, our results indicated that soil N was probably the limiting factor controlling the process of Cunninghamia lanceolata growth in II watershed Guangping village Huitong county. The results provided scientific references for efficient function, stable and sustainable development of Cunninghamia lanceolata.
作者
赵月
王光军
陈婵
陈安娜
李瑾
ZHAO Yue WANG Guang-jun CHEN Chan CHEN An-na LI Jin(Central South University of Forestry and Technology, Changsha, 410004, Hunan, China National Engineering Lab for Applied Technology of Forestry and Ecology in South China, Changsha, 410004, Hunan, China)
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2016年第11期73-79,共7页
Journal of Central South University of Forestry & Technology
基金
湖南省高校创新平台开放基金项目(14k115)
湖南省研究生科研创新课题项目(CX2013B355)
2014湖南省自然科学基金创新研究团体项目
关键词
杉木器官
土壤
化学计量
相关性分析
Cunninghamia lanceolata organs
soil
stoichiometry
correlation analysis
