黄土高原旱地 12 年耕作制度和耕作方式对作物产量和碳权衡的影响

IF 5.6 1区 农林科学 Q1 AGRONOMY Field Crops Research Pub Date : 2024-09-28 DOI:10.1016/j.fcr.2024.109598
Xingyu Guo , Hao Wang , Naeem Ahmad , Rui Wang , Xiaoli Wang , Jun Li
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引用次数: 0

摘要

适合当地环境条件的耕作制度和耕作方法,以平衡粮食生产需求和环境影响,对于实现干旱和半干旱地区农业生产系统的低碳循环和可持续性至关重要。
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Effects of 12-year cropping systems and tillage practices on crop yield and carbon trade-off in dryland Loess Plateau

Context

Cropping systems and tillage practices suitable for local environmental conditions to balance the demand for food production and environmental impacts are critical for achieving a low-carbon cycle and sustainability of agricultural production systems in arid and semiarid regions.

Objectives

This study aimed to evaluate the effect of three tillage practices under diversified cropping systems in terms of food production, farmers’ income, mitigation of greenhouse gas (GHG) emissions, and economic and environmental sustainability.

Methods

Therefore, we conducted a 12-year (2007–2019) field experiment involving three tillage practices (no-tillage, NT; subsoiling tillage, ST; conventional tillage, CT) and three cropping systems (continuous winter wheat, W-W; winter wheat-spring maize cropping, W-M; continuous spring maize, M-M) in the Loess Plateau of China to evaluate their impact on food production, farmers’ income, GHG emissions, and environmental sustainability.

Results

Results indicated that the equivalent yield and equivalent economic benefit were the highest for M-M (9412 kg ha−1and 2655 USD ha−1); W-M and M-M increased equivalent yield by 44.1 % and 102.4 %, equivalent economic benefit by 44.6 % and 164.6 %, soil C sequestration by 23.8 % and 52.9 %, and reduced net GHG emissions (NGHG) by 12.5 % and 7.3 %, respectively, compared with W-W. The equivalent yield and equivalent economic benefit were highest under ST (7200 kg ha−1 and 1767 USD ha−1); NT and ST increased equivalent yield by 3.7 % and 8.1 %, equivalent economic benefit by 10.2 % and 11.1 %, soil C sequestration by 23.5 % and 7.5 %, and carbon sustainability index (CSI) by 5.5 % and 3.1 %, respectively, compared with CT. In addition, NT resulted in 6.5 % lower NGHG emissions than CT, whereas ST resulted in 2.7 % higher NGHG emissions than CT. This study identified W-M and NT with a higher comprehensive evaluation index (CEI) based on entropy-TOPSIS considering 6 indicators (equivalent yield, equivalent economic benefit, soil C sequestration, carbon sustainability index, net greenhouse gases emissions and yield-scaled carbon footprint).

Conclusion

The adoption of W-M and NT in the Loess Plateau has the potential to enhance crop yield and farmers’ income while proving benefits to the environment.

Implications or significance

These findings provide a scientifically grounded basis for selecting effective agricultural management strategies that can maintain food security while minimizing environmental impacts amid climate warming.
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来源期刊
Field Crops Research
Field Crops Research 农林科学-农艺学
CiteScore
9.60
自引率
12.10%
发文量
307
审稿时长
46 days
期刊介绍: Field Crops Research is an international journal publishing scientific articles on: √ experimental and modelling research at field, farm and landscape levels on temperate and tropical crops and cropping systems, with a focus on crop ecology and physiology, agronomy, and plant genetics and breeding.
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