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Energy, Economic, and Environmental Assessment of Sweet Potato Production on Plantations of Various Sizes in South China

文献类型： 外文期刊

作者： Tang, Chaochen 1 ; Lu, Yusheng 3 ; Jiang, Bingzhi 1 ; Chen, Jingyi 1 ; Mo, Xueying 1 ; Yang, Yang 4 ; Wang, Zhangying 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Crops Res Inst, Guangzhou 510640, Peoples R China

2.Key Lab Crop Genet Improvement Guangdong Prov, Guangzhou 510640, Peoples R China

3.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou 510640, Peoples R China

4.Beijing Normal Univ, Sch Environm, Beijing 100875, Peoples R China

关键词： energy balance; cost benefit; greenhouse gas emissions; plantation size; agricultural management

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

ISSN：

年卷期： 2022 年 12 卷 6 期

页码：

收录情况： SCI

摘要： Sweet potato (Ipomoea batatas L.) is an important starch-producing crop used worldwide. However, few studies have been conducted on the energy efficient, cost benefit, and greenhouse gas (GHG) emissions of sweet potato production. To address this issue, the data were collected using a questionnaire for face-to-face interviews of 78 sweet potato growers and 74 reference crop (i.e., rice, maize, and potato) growers in Guangdong province. Results revealed that sweet potato production exhibited the highest value of energy efficiency (0.83 kg MJ(-1)) and economic productivity (0.85 kg CNY-1) among four crops. The GHG emissions from sweet potato production (1165 kg CO2-eq ha(-1)) were significantly higher than GHG from rice and maize but lower than GHG from potatoes. Moreover, plantation size significantly (p < 0.05) affected inputs of labor, machinery, and diesel fuel and further affected the energy rate, energy efficiency, and GHG emissions of sweet potato production. Sweet potato production in small-size farms (<2.0 ha) exhibited the highest energy efficiency (0.97 kg MJ(-1)) and the lowest GHG emissions (1045 kg CO2-eq ha(-1)). Quartering assessments based on energy efficiency, economic productivity, and GHG emissions showed that fertilizers and labor were the major contributors to energy consumption, economic costs, and GHG emissions. Future efforts should be made to reduce fertilizer application and increase fertilizer use efficiency for sustainable sweet potato production.

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