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Biochar amendment boosts photosynthesis and biomass in C(3)but not C(4)plants: A global synthesis

文献类型： 外文期刊

作者： He, Yanghui 1 ; Yao, Yixian 1 ; Ji, Yuhuang 1 ; Deng, Jun 2 ; Zhou, Guiyao 1 ; Liu, Ruiqiang 1 ; Shao, Junjiong 1 ; Zhou, Lingyan 1 ; Li, Na 1 ; Zhou, Xuhui 1 ; Bai, Shahla Hosseini 4 ;

作者机构： 1.East China Normal Univ, Sch Ecol & Environm Sci, Ctr Global Change & Ecol Forecasting,Shanghai Key, Zhejiang Tiantong Forest Ecosyst Natl Observat &, Shanghai, Peoples R China

2.Yunnan Acad Agr Sci, Sugarcane Res Inst, Yunnan Key Lab Sugarcane Genet Improvement, Kaiyuan, Yunnan, Peoples R China

3.Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China

4.Griffith Univ, Sch Environm & Sci, Environm Futures Res Inst, Nathan, Qld, Australia

关键词： biochar; biomass; C(3)and C(4)plants; ecosystem services; photosynthesis; plant growth

期刊名称：GLOBAL CHANGE BIOLOGY BIOENERGY （ 影响因子：4.745； 五年影响因子：5.672 ）

ISSN： 1757-1693

年卷期：

页码：

收录情况： SCI

摘要： Biochar is a carbon (C)-rich solid produced from the thermochemical pyrolysis of biomass. Its amendment to soils has been proposed as a promising mean to mitigate greenhouse gas emissions and simultaneously benefit agricultural crops. However, how biochar amendment affects plant photosynthesis and growth remains unclear, especially on a global scale. In this study, we conducted a global synthesis of 74 publications with 347 paired comparisons to acquire an overall tendency of plant photosynthesis and growth following biochar amendment. Overall, we found that biochar amendment significantly increased photosynthetic rate by 27.1%, and improved stomatal conductance, transpiration rate, water use efficiency, and chlorophyll concentration by 19.6%, 26.9%, 26.8%, and 16.1%, respectively. Meanwhile, plant total biomass, shoot biomass, and root biomass increased by 25.4%, 22.1%, and 34.4%, respectively. Interestingly, plant types (C(3)and C(4)plants) showed greater control over plant photosynthesis and biomass than a broad suite of soil and biochar factors. Biochar amendment largely boosted photosynthesis and biomass on C(3)plants, but had a limited effect on C(4)plants. Our results highlight the importance of the differential response of plant types to biochar amendment with respect to plant growth and photosynthesis, providing a scientific foundation for making reasonable strategies towards an extensive application of biochar for agricultural production management.

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