|本期目录/Table of Contents|

[1]何家莉# 宋怡珂# 王金牛** 周俊 王春雅 查琳 石凝 吴彦 白景文.岷江源区高山林草交错带土壤碳、氮、磷生态化学计量关系的时空变化[J].应用与环境生物学报,2021,27(03):1-12.[doi:10.19675/j.cnki.1006-687x.2020.04055]
 HE Jiali,SONG Yike,WANG Jinniu**,et al.The spatial and temporal variations of soil C, N, P ecological stoichiometry across the alpine forests and grassland ecotone at Minjiang Headwaters[J].Chinese Journal of Applied & Environmental Biology,2021,27(03):1-12.[doi:10.19675/j.cnki.1006-687x.2020.04055]
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岷江源区高山林草交错带土壤碳、氮、磷生态化学计量关系的时空变化()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
27卷
期数:
2021年03期
页码:
1-12
栏目:
研究论文
出版日期:
2021-06-25

文章信息/Info

Title:
The spatial and temporal variations of soil C, N, P ecological stoichiometry across the alpine forests and grassland ecotone at Minjiang Headwaters
作者:
何家莉12# 宋怡珂14# 王金牛1** 周俊3 王春雅15 查琳16 石凝1 吴彦1 白景文3
1中国科学院成都生物研究所 成都 610041
2四川师范大学生命科学学院 成都 610101
3中国科学院水利部成都山地灾害与环境研究所 成都 610041
4甘肃农业大学资源与环境学院 兰州 730070
5成都理工大学地球科学学院 成都 610059
6四川农业大学林学院 成都 611130
Author(s):
HE Jiali12 SONG Yike14 WANG Jinniu1** ZHOU Jun3 WANG Chunya 15 ZHA Lin16 SHI Ning1 WU Yan1 & BAI Jinwen3
1 Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 61 0041, China
2 College of Life Science, Sichuan Normal University, Chengdu 610101 , China
3 Chengdu Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
4 College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China
5 College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
6 College of Forestory, Sichuan Agricultural University, Chengdu 611130, China
关键词:
高山树线生长季养分含量生物地理界线生物地化循环
Keywords:
alpine treeline growth season nutrient biogeographic boundaries biogeochemical cycling
DOI:
10.19675/j.cnki.1006-687x.2020.04055
摘要:
高山林草交错带(Alpine Forest-Grassland Ecotone)作为响应气候变化极为敏感剧烈的地带之一,研究该区域短暂生长季内土壤养分的时空动态变化,有助于理解高山植物生长发育过程中的土壤-植物界面互作过程以及植被分布格局。选取岷江源三处高山林草交错带植物生长季内的土壤样品,分析其养分的动态变化以了解该区域土壤养分对植物生长的供给状况。通过生物地理界线沿海拔从高到低将交错带划分为树种线、树线和密闭森林,并分别于植物生长初期、生长盛期和生长末期在相同样点采集0-20 cm土样。比较分析土壤中总碳、总氮、总磷、有机碳以及水分含量,结果表明土壤养分受生长期阶段和生物地理界线及其交互作用的显著影响。植物从生长初期进入到生长末期,土壤养分含量逐渐减少,其中密闭森林区养分吸收消耗最多。生长季交错带内土壤理化指标变化范围TC含量15-195 g/kg、TN含量2-11 g/kg 、TP含量0.2-1.0 g/kg、SOC含量5-96 g/kg 、SWC含量16-64%。土壤化学计量比的值随时间增大,C/N:25-75、C/P:25-90、N/P:5-75。土壤养分和水分在生长盛期有显著相关关系,且该时期各养分间的相关系数最大。研究表明,植被类型和植物生长速率对下方土壤养分含量有极显著影响;土壤生态化学计量比在植物生长季具有很大波动;高温、高降水及快速的植物生长可以提高土壤养分间的正相关关系。(图5 表3 参47)
Abstract:
Alpine Forest-Grassland ecotone is one of the most sensitive zones in response to climate change. Understanding the temporal and spatial distribution of soil nutrients in this area is helpful to understand the biogeochemical cycle process of soil -plant interface. This paper aims to figure out the relationship between the soil CNP contents and other physical and chemical indicators as well as ecology stoichiometric ratios under different biogeographic boundaries in alpine ecosystem. The temporal and spatial distribution patterns of soil total carbon (TC), total nitrogen (TN), total phosphorus (TP), organic carbon (SOC) and soil water content (SWC) in 0 - 20cm soil layer at the early growth stage, the peak-growing stage, and the end of growth stage of three alpine forest-grassland ecotones in the region of at Minjiang Headwaters . From the beginning to the end of plant growing season, soil nutrient contents decreased gradually. In the growing season, the contents of TC, TN, TP, SOC, and SWC in alpine forest-grassland were 1 5-195 g/kg, 2-11 g/kg, 0.2-1.0 g/kg, 5-94 g/kg, and 16-64% respectively, while the range of soil ecological stoichiometric ratios increased , i.e. C/ N, 25-75, C/P, 25-90, and N/P, 5-75. There were significant correlation s between soil nutrients and water content at the fast-growing stage with the highest correlation coefficient. Vegetation types and plant growth have a significant effect on the soil physical and chemical indicators. The soil ecology stoichiometric ratio fluctuated greatly during the growing season. The coupling between temperature, precipitation and plant growth can improve the positive effects in the biogeochemical cycling.

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备注/Memo

备注/Memo:

收稿日期 Received: 2020-04-30 接受日期 Accepted: 2020-08-26
国家自然科学基金项目(41661144045,31971436)和中国科学院西北生态环境与资源研究院冰冻圈国家重点实验室开放课题(SKLCS-OP-2018-07)资助
##共同第一作者 Co-first authors
**通讯作者 Corresponding author (E-mail: wangjn@cib.ac.cn)
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更新日期/Last Update: 2020-09-10