文献类型： 外文期刊

作者： Feng, Xiaomin ¹ ; Sun, Tao ² ; Guo, Jinrui ⁴ ; Cai, Hongguang ⁴ ; Qian, Chunrong ⁵ ; Hao, Yubo ⁵ ; Yu, Yang ⁵ ; Deng, Aixing ³ ; Song, Zhenwei ³ ; Zhang, Weijian ³ ;

作者机构： 1.Shanxi Agr Univ, Inst Sorghum Res, Jinzhong 030600, Shanxi, Peoples R China

2.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Jinan 250100, Shandong, Peoples R China

3.Chinese Acad Agr Sci, Inst Crop Sci, Key Lab Crop Physiol & Ecol, Minist Agr & Rural Affairs China, Beijing 100081, Peoples R China

4.Jilin Acad Agr Sci, Inst Agr Resources & Environm, Changchun 130033, Jilin, Peoples R China

5.Heilongjiang Acad Agr Sci, Inst Crop Cultivat & Farming, Harbin 150086, Heilongjiang, Peoples R China

6.Chinese Acad Agr Sci, Inst Crop Sci, Key Lab Crop Physiol & Ecol, Minist Agr & Rural Affairs China, Beijing, Peoples R China

关键词： Integrated agronomic management; Soil organic carbon; Greenhouse gas mitigation; Carbon footprint; Net ecosystem economic benefit

期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.8； 五年影响因子：6.9 ）

ISSN： 0378-4290

年卷期： 2023 年 302 卷

页码：

收录情况： SCI

摘要： Maize production is facing multiple challenges toward increasing crop productivity, enhancing resource utilization, and mitigating climate change nowadays. Climate-smart agriculture (CSA) is an emerging concept, which pursues the synthesis of higher crop productivity, lower carbon emissions, and improved soil resilience to the climate change. However, few studies have been done to evaluate the productivity and environmental consequences following the CSA of maize production. Herein, the effects of CSA practice on maize yield, nitrogen use efficiency (partial factor productivity, PFPN), soil organic carbon (SOC) sequestration, and carbon footprint (CF) were evaluated based on a nine-year in-situ field experiment in northeastern China. The experiment followed a randomized block design with three treatments including in traditional farmers' practices (FM), optimized agronomic practices (OPT, aiming to high grain yield and PFPN), and climate-smart agriculture practices (CSA, aiming to higher grain yield, PFPN, SOC stock, while lower CF). Compared with FM, OPT and CSA practices significantly increased grain yield and PFPN by 25.0%-30.1% and 92.2%-100.2% on average of experimental duration, respectively. CSA practice had significant higher global warming potential (GWP) but equivalent global warming potential intensity (GWPI) than these of FM and OPT practices during 2016 and 2017. Meanwhile, CSA practice also achieved the highest SOC sequestration in 0-40 cm soil depth compared to other treatments. Consequently, CF per hectare (CFa) of CSA significantly decreased by 41.4% on average than that of FM mainly due to higher SOC sequestration. Concerning the profit of cropping system, CSA had the highest net ecosystem economic budget (NEEB) of 2090.62 $ ha-1 among the treatments. Overall, CSA practice showed advantages in promoting maize yield while reducing carbon footprint by integrated agronomic management (e.g. dense planting, subsoiling tillage, manure amendments, nitrogen fertilizer optimization, and so on), which could be regarded as a promising practice towards food security and carbon emission mitigation.