湖北农业科学 ›› 2024, Vol. 63 ›› Issue (7): 13-20.doi: 10.14088/j.cnki.issn0439-8114.2024.07.003

• 资源·环境 • 上一篇    下一篇

CO2浓度升高对农田生态系统水分利用效率的影响效应——基于气候箱控制性试验的Meta分析

朱金瑞a, 邹婧汝a,b, 赵国庆a   

  1. 河南大学,a. 民生学院; b. 地理与环境学院,河南 开封 475000
  • 收稿日期:2023-06-05 出版日期:2024-07-25 发布日期:2024-07-24
  • 通讯作者: 邹婧汝(1986-),女,河南信阳人,讲师,博士,主要从事生态学方面的研究工作,(电话)18337823929(电子信箱)zoujingru803@163.com。
  • 作者简介:朱金瑞(2001-),男,河南周口人,在读本科生,研究方向为生态学,(电话)15515439690(电子信箱)1759107042@qq.com

Impacts of elevated CO2 concentration on water use efficiency in cropland ecosystems:A meta-analysis of climate chamber controlled experiments

ZHU Jin-ruia, ZOU Jing-rua,b, ZHAO Guo-qinga   

  1. a. College of Minsheng; b. College of Geography and Environmental Science, Henan University, Kaifeng 475000,Henan, China
  • Received:2023-06-05 Published:2024-07-25 Online:2024-07-24

摘要: 选取1985—2020年21篇与气候箱控制性试验有关的文献,利用Meta分析法研究CO2浓度升高对农田生态系统水分利用效率(WUE)的影响。结果显示,在气候箱的控制下CO2浓度升高对水分利用效率有正面影响,增加的比例为20%,对碳积累和蒸散发分别有正面和负面的效应,影响的效应分别为34%和-4%,但都存在显著的异质性(P<0.05)。研究还发现,CO2浓度升高对WUE的影响效应与对碳积累的影响效应有显著的正相关关系(P<0.05),而与对蒸散发的影响效应没有显著的相关关系(P>0.05)。异质性分析结果显示,CO2浓度升高对WUE的影响效应在不同物种间具有显著的差异,其中对大豆和番茄的影响效应显著高于对小麦的影响效应(P<0.05)。此外,CO2浓度升高对WUE的影响效应与光照强度、温度和土壤相对含水量都有显著的相关关系(P<0.05),其中与光照强度有负相关关系,与温度和土壤含水量有正相关关系;而与CO2富集程度没有显著的相关关系。

关键词: CO2浓度升高, 农田生态系统, 水分利用效率, Meta分析, 气候箱, 环境因子

Abstract: 21 articles related to climate chamber controlled experiments from 1985 to 2020 were selected to study the effects of elevated CO2 concentration on water use efficiency(WUE)of the farmland ecosystem by the meta-analysis method. The results showed that under the control of the climate chamber, the increase of CO2 concentration had a positive impact on water use efficiency (WUE) with an increase ratio of 20%. Furthermore, it had positive and negative effects on carbon accumulation and evapotranspiration with the effects of 34% and -4%, respectively. However, all the responses had significant heterogeneity (P<0.05). The results also found that the effect of elevated CO2 concentration on WUE was significantly positively correlated with the effect on carbon accumulation (P<0.05), but not significantly correlated with the effect on evapotranspiration (P>0.05). The heterogeneity analysis results indicated that the effect of elevated CO2 concentration on WUE was significantly different among various crops, and the effect on soybean and tomato was significantly higher than that on wheat (P<0.05). Moreover, the effect of elevated CO2 concentration on WUE was significantly correlated with light intensity, temperature and soil relative water content (P<0.05), among which, there was a negative correlation with light intensity, a positive correlation with temperature and soil water content, but no significant correlation with CO2 enrichment.

Key words: elevated CO2 concentration, cropland ecosystems, water use efficiency, meta-analysis, climate chamber, environmental factors

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