气候变化领域集成服务门户(CCPortal): Diversified crop rotations increase the yield and economic efficiency of grain production systems

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DOI	10.1016/j.eja.2022.126528
	Diversified crop rotations increase the yield and economic efficiency of grain production systems
	Garbelini, Luiz Gustavo; Debiasi, Henrique; Junior, Alvadi Antonio Balbinot; Franchini, Julio Cezar; Coelho, Antonio Eduardo; Telles, Tiago Santos
发表日期	2022
ISSN	1161-0301
EISSN	1873-7331
卷号	137
英文摘要	Crop rotations with high plant diversity and biomass input have been recognized worldwide as a crucial practice for increasing the sustainability of grain production systems, particularly in regions under no-tillage (NT) management. Nonetheless, low-diversity grain production systems based on double cropping (two crops in the same agricultural year) repeated over time, including soybean followed by maize (known in Brazil as second crop maize ) or wheat, remain prevalent in Brazil. The continuous use of these systems can impair soil yield capacity, farmers' profits, and environmental sustainability. Therefore, this study aimed to verify the grain yield and profitability of different production systems with different levels of plant diversity. This study was based on results obtained during the 2009-2017 cropping seasons through a long-term field trial conducted under NT since 1985 in southern Brazil. The trial covered two 4-year agricultural cycles with two crops per year, resulting in eight crops per cycle and 16 crops over the entire period. The experiment followed a randomized complete block design, with five treatments and four replicates. The treatments involved three diversified crop rotations, comprising different cover crops and two double-crop systems (wheat-soybean and maize-soybean). For a given agricultural year, wheat and cover crops (white oats, black oats, and forage radish) were grown from May to September, and the second crop maize was grown from March to August. Soybean and first crop maize were grown during the summer from October to February. The grain yield, gross revenue, production cost, and cumulative profit were analyzed for each production system. Gross revenue and profit were primarily estimated based on the actual annual average commodity prices received by farmers, and two additional price scenarios (pessimistic and optimistic) were proposed considering the average prices from 2010 to 2017. Regardless of the cropping season, first crop maize and wheat grain yields were higher in diversified crop rotations. The production system only affected the second crop maize yield in 2010/2011, with a higher value obtained in a diversified crop rotation system. The soybean yield in diversified crop rotations was higher than that in double crop systems. Considering each cash crop separately, soybean produced the highest average profit (US$ 472.50 ha(-1)), followed by the first crop maize (US$ 245.31 ha(-1)) and wheat (US$ 77.71 ha(-1)), whereas the second crop maize led to economic losses (-US$ 121.73 ha(-1)). All diversified crop rotations produced a higher 8-year cumulative profit and gross margin than the maize-soybean in double-crop system. The relative economic performance of production systems remained unchanged under alternative price scenarios (pessimistic and optimistic) compared with that under the observed (actual) price scenario. However, the cumulative profit of maize and soybean in double-crop system was the most negatively impacted in the pessimistic scenario (-45.9%), indicating greater economic risk. Overall, lack of direct revenues from cover crops were compensated by increased grain yield in the spring-summer season and profitability of diversified crop rotation systems. Therefore, diversified crop rotation systems are economically competitive with double crop systems, rendering them feasible management options for conserving natural resources and increasing crop resilience to adverse climatic conditions.
英文关键词	Soybean; Maize; Crop yields; Double cropping; Conservation agriculture; Production cost; Profitability
语种	英语
WOS研究方向	Agronomy
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000805729400002
来源期刊	EUROPEAN JOURNAL OF AGRONOMY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/281140
作者单位	Universidade Estadual de Londrina; Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA); Universidade do Estado de Santa Catarina
推荐引用方式 GB/T 7714	Garbelini, Luiz Gustavo,Debiasi, Henrique,Junior, Alvadi Antonio Balbinot,et al. Diversified crop rotations increase the yield and economic efficiency of grain production systems[J],2022,137.
APA	Garbelini, Luiz Gustavo,Debiasi, Henrique,Junior, Alvadi Antonio Balbinot,Franchini, Julio Cezar,Coelho, Antonio Eduardo,&Telles, Tiago Santos.(2022).Diversified crop rotations increase the yield and economic efficiency of grain production systems.EUROPEAN JOURNAL OF AGRONOMY,137.
MLA	Garbelini, Luiz Gustavo,et al."Diversified crop rotations increase the yield and economic efficiency of grain production systems".EUROPEAN JOURNAL OF AGRONOMY 137(2022).