Soybean film mulching has shown promise in maintaining consistent and high yields in semi‐arid regions. However, the specific impacts of full‐film and semi‐film mulching on soybean growth, root nodule traits and grain yield are poorly understood. This 2‐year study (2021–2022) investigates the effects of full‐film and semi‐film mulching on soil moisture, soybean growth and yield. Our findings revealed that semi‐film mulching increased soybean yield by 18.12% compared to full‐film mulching, averaged across 2 years. Furthermore, the semi‐film treatment significantly enhanced biological nitrogen fixation ability, increasing root nodule numbers by 24.81%–33.43%, compared to full‐film mulching. This improvement also positively affected soybean quality, with crude protein content increasing by 5.89% in 2021 and 4.14% in 2022 compared to full‐filming. Moreover, semi‐film mulching helped maintain soil moisture and temperature during later soybean growth stages. There findings suggest that semi‐film mulching is a viable agricultural strategy for soybean cultivation in semi‐arid regions, improving soybean quality and efficiency while promoting environmental sustainability.

中文翻译：

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半膜和全膜覆盖对大豆生长、生物固氮及产量的影响


大豆薄膜覆盖在半干旱地区保持稳定高产方面显示出前景。然而，全膜和半膜覆盖对大豆生长、根瘤性状和籽粒产量的具体影响知之甚少。这项为期两年的研究（2021-2022）调查了全膜和半膜覆盖对土壤湿度、大豆生长和产量的影响。我们的研究结果显示，与全膜覆盖相比，半膜覆盖使大豆产量平均提高了 18.12%，两年平均。此外，半膜处理显着增强了生物固氮能力，与全膜覆盖相比，根瘤数量增加了24.81%~33.43%。这一改进也对大豆品质产生了积极影响，与全膜处理相比，2021 年粗蛋白含量提高了 5.89%，2022 年提高了 4.14%。此外，半膜覆盖有助于在大豆生长后期保持土壤湿度和温度。研究结果表明，半薄膜覆盖是半干旱地区大豆种植的一种可行的农业策略，可以提高大豆质量和效率，同时促进环境可持续性。