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Effects and Mechanisms of Phosphate Activation in Paddy Soil by Phosphorus Activators

Author

Listed:
  • Huanli Yao

    (College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, Guangdong, China)

  • Xian Chen

    (College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, Guangdong, China
    Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China)

  • Junying Yang

    (College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, Guangdong, China)

  • Jihong Li

    (College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, Guangdong, China)

  • Jiale Hong

    (College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, Guangdong, China)

  • Yueming Hu

    (College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, Guangdong, China
    Guangdong Provincial Key Laboratory for Land Use and Consolidation, South China Agricultural University, Guangzhou 510642, Guangdong, China)

  • Xiaoyun Mao

    (College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, Guangdong, China
    Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
    Guangdong Provincial Key Laboratory for Land Use and Consolidation, South China Agricultural University, Guangzhou 510642, Guangdong, China)

Abstract

Phosphorus (P) build-up in agricultural soils as a consequence of excessive P fertilizer application necessitates the exploration of soil P pool for crop supply. We conducted a soil incubation experiment, pot experiments, and field experiments to study the effects of different P activators (Pas) (humic acid, lignosulfonate sodium, and biochemical humic acid) on soil phosphate fraction, rice yield, and P loss. Through chemical analyses and microbial community structure measurement, we found that Pas significantly increased paddy soil water-soluble P (WSP), available P, Fe-P, and relative abundances of P-mineralizing and P-solubilizing microorganisms, whereas they decreased Al-P and microbial alpha diversity. Our pot experiment results showed that the application of Pas significantly reduced soil P loss and resulted in grain yield comparable to those obtained by fertilization with P fertilizers, and significantly higher than those in the control plants. The results of the field experiment suggested that Pas are able to increase rice yield more significantly than P fertilizers and improve the P utilization efficiency of rice plants. We conclude that application of Pas was more effective in reducing P leaching, soil total P, WSP, and Olsen P than P fertilizers during rice harvest.

Suggested Citation

  • Huanli Yao & Xian Chen & Junying Yang & Jihong Li & Jiale Hong & Yueming Hu & Xiaoyun Mao, 2020. "Effects and Mechanisms of Phosphate Activation in Paddy Soil by Phosphorus Activators," Sustainability, MDPI, vol. 12(9), pages 1-15, May.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:9:p:3917-:d:356479
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    Cited by:

    1. Jinwu Wang & Xiaobo Sun & Yanan Xu & Wenqi Zhou & Han Tang & Qi Wang, 2021. "Timeliness Harvesting Loss of Rice in Cold Region under Different Mechanical Harvesting Methods," Sustainability, MDPI, vol. 13(11), pages 1-18, June.

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