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Optimized farmland mulching improves alfalfa yield and water use efficiency based on meta-analysis and regression analysis

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  • Minhua, Yin
  • Yanlin, Ma
  • Yanxia, Kang
  • Qiong, Jia
  • Guangping, Qi
  • Jinghai, Wang
  • Changkun, Yang
  • Jianxiong, Yu

Abstract

Alfalfa (Medicago sativa L.), a globally vital forage crop with abundant nutrition and high yield, is commonly planted in arid and semi-arid regions where water resources are scare, such as China. In order to adapt water limitation conditions, farmland mulching (FM) is gradually being applied in alfalfa production. However, the effects of FM on alfalfa in different climatic conditions and management practices should be investigated before concluding that it is universally effective. We performed a meta-analysis and regression analysis of 94 yield comparisons and 74 water use efficiency (WUE) comparisons from 19 peer-reviewed studies and founded that FM significantly increased alfalfa yield and WUE, on average by 38.5% and 43.7%, respectively, compared to non-mulching. However, the increase rate (IR) of yield and WUE varied with mulching type, region, management, and length of growth year. For yield, FM was more pronounced in Gansu, in regions with an average annual precipitation (AAP) of 400–600 mm, average annual temperature (AAT) < 0 °C, and altitude > 2000 mm, and with plastic film, all of the soil surface mulching, ridge–furrow planting, sowing rate (SR) < 20 kg ha–1 and nitrogen application rate (NAR) < 100 kg ha–1. Overall, AAP and altitude had significant positive effects on yield IR of mulching alfalfa, while AAT and SR had significant negative effects. The effects of these factors on yield IR varied across different quantiles. For WUE, FM was more beneficial in regions with AAP of 200–400 mm and AAT > 6 °C. Only SR had a significant negative effect on the WUE IR of mulching alfalfa as a whole, while the effects of AAP, AAT, and altitude were significant in some quantiles. Our findings confirm the benefits of FM to increase alfalfa yield and WUE in China, identify the conditions under which these results can be achieved, and also suggest that the benefits are site specific.

Suggested Citation

  • Minhua, Yin & Yanlin, Ma & Yanxia, Kang & Qiong, Jia & Guangping, Qi & Jinghai, Wang & Changkun, Yang & Jianxiong, Yu, 2022. "Optimized farmland mulching improves alfalfa yield and water use efficiency based on meta-analysis and regression analysis," Agricultural Water Management, Elsevier, vol. 267(C).
    • Handle: RePEc:eee:agiwat:v:267:y:2022:i:c:s0378377422001640
    DOI: 10.1016/j.agwat.2022.107617
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    References listed on IDEAS

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    1. Li, Rong & Hou, Xianqing & Jia, Zhikuan & Han, Qingfang & Ren, Xiaolong & Yang, Baoping, 2013. "Effects on soil temperature, moisture, and maize yield of cultivation with ridge and furrow mulching in the rainfed area of the Loess Plateau, China," Agricultural Water Management, Elsevier, vol. 116(C), pages 101-109.
    2. Liu, Minguo & Wang, Zikui & Mu, Le & Xu, Rui & Yang, Huimin, 2021. "Effect of regulated deficit irrigation on alfalfa performance under two irrigation systems in the inland arid area of midwestern China," Agricultural Water Management, Elsevier, vol. 248(C).
    3. Anwar Abduwaiti & Xiaowei Liu & Changrong Yan & Yinghao Xue & Tuo Jin & Hongqi Wu & Pengcheng He & Zhe Bao & Qin Liu, 2021. "Testing Biodegradable Films as Alternatives to Plastic-Film Mulching for Enhancing the Yield and Economic Benefits of Processed Tomato in Xinjiang Region," Sustainability, MDPI, vol. 13(6), pages 1-13, March.
    4. Koenker, Roger W & Bassett, Gilbert, Jr, 1978. "Regression Quantiles," Econometrica, Econometric Society, vol. 46(1), pages 33-50, January.
    5. Yin, Minhua & Li, Yuannong & Fang, Heng & Chen, Pengpeng, 2019. "Biodegradable mulching film with an optimum degradation rate improves soil environment and enhances maize growth," Agricultural Water Management, Elsevier, vol. 216(C), pages 127-137.
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    1. Aliasghar Montazar & Daniel Putnam, 2023. "Evapotranspiration and Yield Impact Tools for More Water-Use Efficient Alfalfa Production in Desert Environments," Agriculture, MDPI, vol. 13(11), pages 1-21, November.

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