Impact of Climate Change and Rubber (Hevea brasiliensis) Plantation Expansion on Reference Evapotranspiration in Xishuangbanna, Southwest China

Frontiers in Plant Science

Plant Science

Zhengtao Shi¹  Guojian Feng²  Weiwei Zhu²  Tao Wang²  Zhen Ling²  Shixiang Gu³ 

[1] College of Tourism and Geographic Sciences, Yunnan Normal University, Kunming, China;Department of Architecture Engineering, Kunming University, Kunming, China;State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, China;Yunnan Institute of Water & Hydropower Engineering Investigation, Design and Research, Kunming, China;

关键词: climate change;    rubber plantation;    sensitivity coefficient;    contribution rate;    reference evapotranspiration;   

DOI  :  10.3389/fpls.2022.830519

 received in 2021-12-07, accepted in 2022-01-17,  发布年份 2022

来源: Frontiers

【 摘 要 】

The expansion of rubber (Hevea brasiliensis) cultivation plantation over the past few decades has been significantly explosive in Xishuangbanna, southwest China. More and more evidences concerning the expansion of rubber plantations lead to the negative influence to local regional hydrology. It is vital to explore the impact of climate change and rubber (Hevea brasiliensis) plantation expansion on reference evapotranspiration (ET0) for the sustainable and efficient use of regional water resources. In this study, the spatiotemporal variation of ET0 as well as its relationship in rubber plantations area in Xishuangbanna from 1970–2017 were analyzed by using trend, correlation and contribution analysis. The results showed that the rubber plantation was 12,768 ha yr–1 from 1990 to 2017 in Xishuangbanna, and nearly 40.8% of new rubber plantations expanded above 900 m in altitude from 2000 to 2017. Sunshine duration and average relative humidity were the key meteorological factors that affect ET0 in Xishuangbanna, with the sensitivity coefficient of 0.51 and 0.35, respectively. The multiyear relative change of ET0 in Xishuangbanna was 9.18%, and the total contribution of major climate factors was 7.87% during 1970 and 2017. The average relative humidity in the plantation area decreases, which directly leads to the increase of ET0. The amount of ET0 change from 2000 to 2017 affected by climate change increased at 3.13 mm/10a, whereas it was 2.17 mm/10a affected by the expansion of rubber plantations by quantitative separation. ET0 was significantly affected by climate change but intensified by the expansion of rubber plantation.

【 授权许可】

Unknown   
Copyright © 2022 Ling, Shi, Gu, Wang, Zhu and Feng.