数字农科院2.0

Soybean-maize intercropping combined with water management enhances leaf traits to obtain yield benefits in semi-arid regions

文献类型： 外文期刊

作者： Chen, Ping;Xian, Gaojie;Pu, Tian;Gong, Wanzhuo;Li, Jianzheng;Yang, Feng;Wang, Xiaochun;Yong, Taiwen;Li, Yuze;Yan, Yanhong;Liu, Jiang;Yang, Wenyu;Wu, Yushan

作者机构：

关键词： Cropping system;Photosynthetic plasticity;Productivity;Competition;Economic benefits

期刊名称： FIELD CROPS RESEARCH

ISSN： 0378-4290

年卷期： 2025 年 327 卷

页码：

收录情况： SCIE（2025版）

摘要： Context: Intercropping can enhance land use efficiency and offer promising ways for achieving food security and sustainable agriculture. However, the impact of water management on intercropping productivity still needs to be further studied in semi-arid areas, particularly the mechanisms behind the yield advantages related to crop leaf photosynthetic parameters in soybean-maize intercropping are still unclear. Objective: The current study aimed to assess the effects of cropping systems and water management on crop biomass accumulation, photosynthesis, grain yield, land equivalent ratio (LER), and economic benefits of soybean-maize intercropping systems in semi-arid regions. Methods: A two-year field experiment using a two-factor randomized block design was conducted in Baotou, Inner Mongolia, a semi-arid region of China. The study compared alternate soybean-maize intercropping (RI) and strip soybean-maize intercropping (SI) with the corresponding sole cropping (Factor A) under two water management strategies (Factor B), and analysed crop leaf functional traits mediated biomass accumulation and yield advantages in intercropping. Results: Results showed that the LER ranged from 1.07 to 1.17 for RI with average partial land equivalent ratio (pLER) at 0.20 and 0.92 for soybean and maize. The LER of SI ranged from 1.13 to 1.35 and the pLER of soybean and maize were 0.38 and 0.86. The average net effect of soybean-maize intercropping was 5.41 Mg ha-1. Although the LER was independent of water management, full irrigation without plastic film mulch treatment (WM1) boosted the net effect of intercropping systems compared with the reduced irrigated ridge-furrow treatment (WM0). Intercropping enhanced biomass accumulation and grain yield by increasing the leaf area index rather than improving leaf photosynthetic parameters. Additionally, WM1 improved crop leaf functional traits and enhanced biomass accumulation contributing to higher yield advantages and economic benefit compared with WM0. Conclusions: In semi-arid regions, soybean-maize intercropping can achieve trade-off situations of yield advantages. Especially, strip soybean-maize intercropping with WM1 has obtained the highest yield advantage and economic benefit by enhancing the functional traits of crop leaves. Implications: The current study deciphered the mechanism of yield advantages for soybean-maize intercropping in semi-arid regions, and also proposed reasonable water management strategies. Especially in the strip inter-cropping, the optimized water management strategies should be considered to further increase land productivity.

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