燕麦/大豆带状间作有利于半干旱地区的作物产量和稳定性:多地点、多年评估

IF 5.6 1区 农林科学 Q1 AGRONOMY
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引用次数: 0

摘要

背景间作在促进农业可持续发展方面发挥着至关重要的作用,为提高作物产量和确保粮食安全提供了另一种途径。然而,燕麦/大豆间作的产量效益和稳定性很少在多个地点和年份进行评估,尤其是在降水量低且分布不均的半干旱地区。方法 在中国半干旱地区的三个代表性地点(即乌兰察布、右玉和张家口)进行了为期三年(2019-2021 年)的完全随机区组设计田间试验。每个试验包括燕麦/大豆间作和相应的单作,共设四个重复。结果在三年中,间作与单作相比,燕麦产量大幅增加了 21.7% 至 47.6%,但大豆产量却减少了 14.6% 至 26.5%。结果显示,所有三个地点的土地利用效率都有显著提高,平均土地当量比(LER)为 1.12。进一步分析表明,间作燕麦不仅在边行(单作的 2.21 倍)增产明显,在内行(单作的 1.13 倍)也增产明显,突出了它们的综合贡献。此外,在多个地点和多个年份,间作套种的净收入平均高出 5.2∼9.4%。此外,在三个地点中的两个地点,间作套种的产量稳定性比单作套种高 5.5∼62.6 %,而且产量稳定性与作物产量和纯收入呈正相关。意义我们的研究结果证明了燕麦/大豆带状间作在半干旱地区的可行性,并评估了其超产机制,这对农业可持续发展具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oat/soybean strip intercropping benefits crop yield and stability in semi-arid regions: A multi-site and multi-year assessment

Context

Intercropping plays a crucial role in promoting agricultural sustainability and offers an alternative way to enhance crop production and ensure food security. However, the yield benefits and stability of oat/soybean intercropping have rarely been assessed across multiple sites and years, especially in semi-arid regions with low and unevenly distributed precipitation.

Objective

This study aimed to investigate the yield performance, yield stability, and economic benefits of oat/soybean strip intercropping through multiple sites and years of field experiments.

Methods

A three-year field experiment (2019–2021) with a completely randomized block design was conducted at three representative sites in semi-arid regions of China (i.e. Wulanchabu, Youyu, and Zhangjiakou). Each experiment included oat/soybean intercropping and corresponding monoculture with four replicates. Land equivalent ratio, yield stability, and economic income were compared between intercropping and monoculture.

Results

Over the three years, intercropping led to a substantial increase in oat yield, ranging from 21.7 % to 47.6 %, albeit accompanied by a reduction in soybean yield by 14.6–26.5 %, compared to corresponding monoculture. The results revealed a notable improvement in land use efficiency across all three sites with a mean land equivalent ratio (LER) of 1.12. Further analysis demonstrated that the yield enhancement of intercropped oat was evident not only in the border rows (2.21 times of monoculture) but also in the inner rows (1.13 times of monoculture), highlighting their combined contributions. Moreover, intercropping produced 5.2∼9.4 % higher net income on average across multiple sites and years. Additionally, intercropping exhibited 5.5∼62.6 % greater temporal yield stability compared to monoculture at two of three sites, and the temporal yield stability was positively correlated with crop yield and net income.

Conclusions

Oat/soybean strip intercropping emerges as a promising agronomic strategy to boost crop production while preserving relatively higher yield stability, thereby enhancing farmers' economic income across diverse semi-arid regions in China.

Implications

Our findings demonstrated the feasibility of the oat/soybean strip intercropping in semi-arid regions and evaluated its over-yield mechanisms, which is significant to agricultural sustainable development.

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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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