Distribution Characteristics and Influence Factors of Vegetation Phosphorus Content of Alpine Grassland Ecosystem in Qinhai-Tibet Plateau

doi:10.11733/j.issn.1007-0435.2014.01.006

›› 2014, Vol. 22 ›› Issue (1): 27-38.DOI: 10.11733/j.issn.1007-0435.2014.01.006

Distribution Characteristics and Influence Factors of Vegetation Phosphorus Content of Alpine Grassland Ecosystem in Qinhai-Tibet Plateau

WANG Jian-lin¹, ZHONG Zhi-ming², WANG Zhong-hong¹, YU Cheng-qun², ZHANG Xian-zhou², HU Xing-xiang¹, SHEN Zhen-xi², Dacizhuoga¹

1. College of Plant Science, Tibet Institute of Agriculture and Animal Husbandry, Linzhi, Tibet 860000, China;
2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Received:2013-05-16 Revised:2013-06-15 Online:2014-02-15 Published:2014-01-28

青藏高原高寒草原生态系统植被磷含量分布特征及其影响因素

王建林¹, 钟志明², 王忠红¹, 余成群², 张宪洲², 胡兴祥¹, 沈振西², 大次卓嘎¹

1. 西藏农牧学院植物科学学院, 西藏林芝 860000;
2. 中国科学院地理科学与资源研究所, 北京 100101

通讯作者: 钟志明，E-mail：zhongzm@igsnrr.ac.cn
作者简介:王建林（1969-），男，教授，甘肃临洮人，主要从事高原生态环境与生物多样性研究，E-mail：xzwangjl@126.com
基金资助:
国家自然科学基金（41061008）；国家科技支撑项目（2011BAD17B05-4）资助

Abstract

Abstract: The vegetation type of alpine grassland widely distributed in Qinhai-Tibet plateau. The vegetation phosphorus contents and influence factors of alpine grassland ecosystem in Qinhai-Tibet plateau were investigated in this paper based on the methods of field investigation combining with laboratory analysis. Results showed that the average phosphorus content of plant leaves from 19 tested grassland types was 1.8489±0.6411 g·kg^-1, the coefficient of variation was 34.67%. And the average phosphorus content of plant roots was 1.4130±0.3524 g·kg^-1, the coefficient of variation was 24.94%. The phosphorus contents of vegetation plants were higher in west-east and lower in center with the distribution characteristics of staggered pattern in Qinhai-Tibet plateau. The key environmental influencing factors of leaf phosphorus content were ordered as soil organic matter content > soil organic nitrogen content > soil total nitrogen content > average annual temperature > average temperature in the coldest month >soil bulk densities from 0 cm to 20 cm soil layers > soil hydrolyzed carbon content > soil total phosphorus content > soil pH value > vegetation height > soil HCO₃^- content > the precipitation rate during the period from June to September > soil available K content > soil available N content. The key environmental influencing factors of root phosphorus content are ordered as average annual humidity > average annual precipitation > soil bulk densities from 0 cm to 20 cm soil layers > soil water contents in the depths of 10 cm to 20 cm > average temperature in the coldest month > average temperature in the warmest month > underground biomass in the soil depths of 20 cm to 30 cm > soil pH value.

Key words: Qinghai-Tibet Plateau, Alpine grassland, Vegetation phosphorus content, Distribution characteristics, Influence factors

摘要： 采用野外调查与室内分析相结合的研究方法，对高寒草原生态系统植被磷含量的分布特征及其影响因素进行研究。结果表明：青藏高原高寒草原19个草地型植物叶片磷含量的平均值为1.8489±0.6411 g·kg^-1，变异系数为34.67%，植物根系磷含量的平均值为1.4130±0.3524 g·kg^-1，变异系数为24.94%，植被磷含量总体呈现出东西部高而中间低的态势和斑块状交错分布格局；影响植物叶片磷含量的关键环境因子为：土壤有机质含量> 土壤总有机碳含量> 全氮> 年均气温> 最冷月均气温> 10~20 cm土壤容重> 20~30 cm土壤容重> 土壤水溶性碳含量> 土壤全磷含量> 土壤pH值> 植被高度> 土壤HCO₃^-含量> 6—9月降水率> 土壤速效钾含量> 土壤速效氮含量；影响植物根系磷含量的关键环境因子则为：年均相对湿度> 年均降水量> 10~20 cm土壤容重> 0~10 cm土壤容重> 10~20 cm土壤含水量> 最冷月均气温> 最暖月均气温> 20~30 cm地下生物量> 土壤pH值。

关键词: 青藏高原, 高寒草原, 磷含量, 分布特征, 影响因素

CLC Number:

Q142
Q948.11

WANG Jian-lin, ZHONG Zhi-ming, WANG Zhong-hong, YU Cheng-qun, ZHANG Xian-zhou, HU Xing-xiang, SHEN Zhen-xi, Dacizhuoga. Distribution Characteristics and Influence Factors of Vegetation Phosphorus Content of Alpine Grassland Ecosystem in Qinhai-Tibet Plateau[J]. , 2014, 22(1): 27-38.

王建林, 钟志明, 王忠红, 余成群, 张宪洲, 胡兴祥, 沈振西, 大次卓嘎. 青藏高原高寒草原生态系统植被磷含量分布特征及其影响因素[J]. , 2014, 22(1): 27-38.

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Distribution Characteristics and Influence Factors of Vegetation Phosphorus Content of Alpine Grassland Ecosystem in Qinhai-Tibet Plateau

青藏高原高寒草原生态系统植被磷含量分布特征及其影响因素

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