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Effects of Long-Term Straw Management and Potassium Fertilization on Crop Yield, Soil Properties, and Microbial Community in a Rice–Oilseed Rape Rotation

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  • Jifu Li

    (Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education/College of Agriculture, Yangtze University, No.266, Jingmi Road, Jingzhou District, Jingzhou 434025, China
    Key Laboratory of Waste and Fertilization Utilization, Ministry of Agriculture and Rural Areas, Wuhan 430070, China)

  • Guoyu Gan

    (Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education/College of Agriculture, Yangtze University, No.266, Jingmi Road, Jingzhou District, Jingzhou 434025, China
    Key Laboratory of Waste and Fertilization Utilization, Ministry of Agriculture and Rural Areas, Wuhan 430070, China)

  • Xi Chen

    (Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education/College of Agriculture, Yangtze University, No.266, Jingmi Road, Jingzhou District, Jingzhou 434025, China)

  • Jialong Zou

    (Agricultural Science and Technology Service Center, Bureau of Agriculture and Rural Areas, Jingzhou District, Jingzhou 434025, China)

Abstract

The present study aims to assess the influences of long-term crop straw returning and recommended potassium fertilization on the dynamic change in rice and oilseed rape yield, soil properties, bacterial and fungal alpha diversity, and community composition in a rice–oilseed rape system. A long-term (2011–2020) field experiment was carried out in a selected paddy soil farmland in Jianghan Plain, central China. There were four treatments with three replications: NP, NPK, NPS, and NPKS, where nitrogen (N), phosphate (P), potassium (K), and (S) denote N fertilizer, P fertilizer, K fertilizer, and crop straw, respectively. Results showed that long-term K fertilization and crop straw returning could increase the crop yield at varying degrees for ten years. Compared with the NP treatment, the long-term crop straw incorporation with K fertilizer (NPKS treatment) was found to have the best effect, and the yield rates increased by 23.0% and 20.5% for rice and oilseed rape, respectively. The application of NPK fertilizer for ten years decreased the bacterial and fungal alpha diversity and the relative abundance of dominant bacterial and fungal taxa, whereas continuous straw incorporation had a contradictory effect. NPKS treatment significantly increased the relative abundance of some copiotrophic bacteria (Firmicutes, Gemmatimonadetes, and Proteobacteria) and fungi (Ascomycota). Available K, soil organic matter, dissolved organic carbon, and easily oxidized organic carbon were closely related to alterations in the composition of the dominant bacterial community; easily oxidized organic carbon, dissolved organic carbon, and slowly available K were significantly correlated with the fungal community. We conclude that long-term crop straw returning to the field accompanied with K fertilizer should be employed in rice-growing regions to achieve not only higher crop yield but also the increase in soil active organic carbon and available K content and the improvement of the biological quality of farmland.

Suggested Citation

  • Jifu Li & Guoyu Gan & Xi Chen & Jialong Zou, 2021. "Effects of Long-Term Straw Management and Potassium Fertilization on Crop Yield, Soil Properties, and Microbial Community in a Rice–Oilseed Rape Rotation," Agriculture, MDPI, vol. 11(12), pages 1-18, December.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:12:p:1233-:d:696997
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    References listed on IDEAS

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    1. Cynthia M. Kallenbach & Serita D. Frey & A. Stuart Grandy, 2016. "Direct evidence for microbial-derived soil organic matter formation and its ecophysiological controls," Nature Communications, Nature, vol. 7(1), pages 1-10, December.
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    Cited by:

    1. Yang, Xin & Zhou, Xiaohe & Deng, Xiangzheng, 2022. "Modeling farmers’ adoption of low-carbon agricultural technology in Jianghan Plain, China: An examination of the theory of planned behavior," Technological Forecasting and Social Change, Elsevier, vol. 180(C).
    2. Jakub Dobrzyński & Barbara Wróbel & Ewa Beata Górska, 2023. "Taxonomy, Ecology, and Cellulolytic Properties of the Genus Bacillus and Related Genera," Agriculture, MDPI, vol. 13(10), pages 1-20, October.

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