北京林业大学学报2019，Vol.41Issue(2)：41-52,12.DOI:10.13332/j.1000--1522.20180329
震区生态治理初期植物、土壤的养分含量及叶片化学计量特征
Characteristics of plants, soil nutrients and leaf stoichiometry at the early stage of ecological restoration in earthquake-affected area
摘要
Abstract
[Objective]Under the background of ecological restoration and reconstruction of earthquakeaffected areas in southwestern China, exploring the characteristics of vegetation coverage, plantcommunity species diversity, biomass change and six major mineral element contents, and plant carbon (C) , nitrogen (N) , phosphorus (P) stoichiometry will help to fully understand the dynamic process of vegetation restoration in the earthquake-affected areas. [Method] The destroyed and treated plots and the undestroyed plots (control group) of Wenzhou Town (arid-valley climate region) in Wenchuan County and Hanwang Town (subtropical monsoon climate region) in the Mianzhu City of typical area of the severely affected Wenchuan earthquake were studied. The vegetation restoration and the main elements and their stoichiometric characteristics of different organs of the plant in the destroyed and treated area (DTA) and the undestroyed area (UA) were analyzed. [Result ] (1) The vegetation restoration rate in the subtropical monsoon climate region (65. 74％) was higher than that in the aridvalley climate region (50. 68％) , and the coefficient of variation of DTA in the arid-valley climate region and subtropical monsoon climate region was 40. 44％ and 23. 06％, respectively, which was higher than UA by 14. 49％ and 8. 62％. (2) Only stem biomass of plant organs showed significant difference between DTA and UA in two climate regions (P ＜ 0. 05) . Only leaf carbon content in plant organs showed that DTA was significantly larger than UA in the arid-valley climate region (P ＜ 0. 05); (3) The element content in different plant organs was mainly N＞ K＞ Ca＞ Mg＞ P＞ Na; (4) Through the leaf nitrogen-phosphorus ratio (N: P) , it was found that the DTA and UA in arid-valley climate region were mainly restricted by phosphorus (P) , while the DTA and the UA in subtropical monsoon climate region were mainly restricted by nitrogen (N) . [Conclusion] The above research shows that climate may be the dominant factor affecting vegetation restoration, and limited nutrient factors affecting vegetation and soil restoration should be fully considered. The research results can provide a scientific basis for the restoration and reconstruction of ecological functions in the earthquake-affected areas in southwestern China.关键词
地震灾区/生态恢复/植被/矿物质元素/化学计量比Key words
earthquake-affected area/ecological restoration/vegetation/mineral element/stoichiometric ratio分类
农业科技引用本文复制引用
吴建召,崔羽,贺静雯,刘颖,李键,林勇明,王道杰,吴承祯..震区生态治理初期植物、土壤的养分含量及叶片化学计量特征[J].北京林业大学学报,2019,41(2):41-52,12.基金项目
国家自然科学基金项目(41790434) （41790434）
福建农林大学杰出青年科研人才计划项目(xjq2017016) （xjq2017016）
福建农林大学科技创新专项基金项目(CXZX2017111、CXZX2017283) （CXZX2017111、CXZX2017283）
