Spatial patterns and impacting factors of leaf potassium content among different functional groups of herbaceous plants across China

He Yicheng; Tian Dashuan; Wang Jinsong; Fu Yiwen; Wei Xuehong; Li Jingwen

doi:10.12171/j.1000-1522.20200324

Journal of Beijing Forestry University > 2021 > 43(8): 83-89. > DOI: 10.12171/j.1000-1522.20200324

He Yicheng, Tian Dashuan, Wang Jinsong, Fu Yiwen, Wei Xuehong, Li Jingwen. Spatial patterns and impacting factors of leaf potassium content among different functional groups of herbaceous plants across China[J]. Journal of Beijing Forestry University, 2021, 43(8): 83-89. DOI: 10.12171/j.1000-1522.20200324

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Spatial patterns and impacting factors of leaf potassium content among different functional groups of herbaceous plants across China

1.
School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
2.
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
3.
Suzhou University, Suzhou 234000, Anhui, China
4.
Tibet Agriculture and Animal Husbandry University, Nyingchi 860000, Tibet, China

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Received Date: October 26, 2020
Revised Date: November 23, 2020
Available Online: July 11, 2021
Published Date: August 30, 2021

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Abstract

Abstract

Objective Potassium (K) is a vital element to sustain plant growth and high water-use efficiency, especially in the current context of increasing aridification. However, previous studies on plant K have mostly been conducted at local scale, and it is still unclear that what difference exists in the spatial patterns and controlling factors of leaf K content among different herb functional groups across large scale.
Method Based on an analysis of 685 herbaceous plants across 158 sampling sites in China, this study aims to reveal the spatial patterns of leaf K content among different herb functional groups, and further quantify the relationship of leaf K with climate or soil nutrients.
Result Our results showed that: (1) herb leaf K content across China increased linearly with latitude, but decreased with longitude. Its spatial patterns were different among varied functional groups. (2) These patterns of leaf K were mainly driven by humid index and soil total nitrogen. (3) The impacting factors of the spatial patterns were different among varied functional groups. Leaf K in annual herb was significantly affected by both humid index and soil total nitrogen, while it was only influenced by soil total nitrogen for perennial herb. Leaf K in herbs with low K use efficiency was mainly affected by humid index and soil total nitrogen, but it was impacted by soil total nitrogen and total phosphorus for herbs with high K use efficiency. The main impacting factor of leaf K in Asteraceae and Cyperaceae herbs was soil total nitrogen, but humid index for Poaceae herbs.
Conclusion This study is the first to systematically compare and reveal the difference in the spatial patterns and key controlling factors of leaf K among different herb functional groups across China. These results have important implications for understanding the adaptive mechanisms of plant functional groups and the dynamics of plant community composition with increasing global aridification.
- leaf potassium content,
- herb,
- functional group,
- spatial pattern,
- drought adaptation

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References

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Spatial patterns and impacting factors of leaf potassium content among different functional groups of herbaceous plants across China

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