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Yield and Quality of Rice under the Effects of Digestate Application

Author

Listed:
  • Yi Ran

    (College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
    Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China)

  • Xinlu Bai

    (Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China)

  • Yan Long

    (Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China)

  • Ping Ai

    (College of Engineering, Huazhong Agricultural University, Wuhan 430070, China)

Abstract

As a major measure to handle livestock manure, digestate is the by-product during biogas production in anaerobic fermentation. Digestate can be returned to cropland as a replacement for chemical fertilizer regarding its cost-effectiveness and rich nutrient content. However, the optimal rates of digestate to substitute chemical fertilizer have not been validated academically. A field study on nine treatments of no fertilizer, chemical fertilizer, and digestate at different rates was conducted to investigate the effects of substituting chemical fertilizer with digestate. The results revealed that replacing chemical fertilizer with liquid digestate did not significantly affect the rice growth regarding the maximum number of seedlings, plant height, tiller numbers, spikelets numbers, ear length, the number of grains per spike, and grain yields. However, improvements were found in the maximum number of seedlings, plant height, tiller number spikelet numbers, the area of the second and third backward leaves, grain yields, and quality when liquid and solid digestate were combined. Furthermore, taking the nutrient inputs, rice growth, grain yield, and quality into consideration, applying liquid digestate of 150 t ha −1 and 75 t ha −1 of liquid combined with 15 t ha −1 solid digestate was suggested for rice production at the study venue.

Suggested Citation

  • Yi Ran & Xinlu Bai & Yan Long & Ping Ai, 2022. "Yield and Quality of Rice under the Effects of Digestate Application," Agriculture, MDPI, vol. 12(4), pages 1-10, April.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:4:p:514-:d:787153
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    References listed on IDEAS

    as
    1. Md Arifur Rahaman & Xiaoying Zhan & Qingwen Zhang & Shuqin Li & Shengmei Lv & Yuting Long & Hailing Zeng, 2020. "Ammonia Volatilization Reduced by Combined Application of Biogas Slurry and Chemical Fertilizer in Maize–Wheat Rotation System in North China Plain," Sustainability, MDPI, vol. 12(11), pages 1-15, May.
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    Cited by:

    1. Yueyue Xu & Yingxin Wang & Xiangcheng Ma & Tie Cai & Zhikuan Jia, 2022. "Effect of a Ridge-Furrow Mulching System and Limited Supplementary Irrigation on N 2 O Emission Characteristics and Grain Yield of Winter Wheat ( Triticum aestivum L.) Fields under Dryland Conditions," Agriculture, MDPI, vol. 12(5), pages 1-16, April.
    2. Rebeka Pajura & Adam Masłoń & Joanna Czarnota, 2023. "The Use of Waste to Produce Liquid Fertilizers in Terms of Sustainable Development and Energy Consumption in the Fertilizer Industry—A Case Study from Poland," Energies, MDPI, vol. 16(4), pages 1-24, February.

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