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  5. Agricultural, Veterinary And Food Sciences
  7. Crop And Pasture Production
  9. Crop And Pasture Improvement (incl. Selection And Breeding)
  11. Co-incorporation Of Green Manure And Rice Straw Increases Rice Yield And Nutrient Utilization

Co-Incorporation of Green Manure and Rice Straw Increases Rice Yield and Nutrient Utilization

Cuilan Wei1, Bingshuai Cao2, Songjuan Gao3

  • 1College of Environment and Ecology, Jiangsu Open University, Nanjing 210036, China.

Plants (Basel, Switzerland)
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Green manure with rice straw return (GMS) can maintain rice yield while reducing nitrogen fertilizer by 40%. This practice improves nutrient use efficiency and soil fertility, supporting sustainable agriculture.

Area of Science:

  • Agricultural Science
  • Soil Science
  • Agronomy

Background:

  • Co-incorporation of green manure and rice straw is a common practice to boost rice yield and soil fertility in paddy fields.
  • The synergistic mechanisms of green manure with rice straw return on nutrient dynamics in rice cultivation remain underexplored, particularly in the Taihu Plain.

Purpose of the Study:

  • To investigate the impact of green manure with rice straw return (GMS) under varying nitrogen (N) fertilization rates on rice yield, nutrient use efficiency, and soil fertility.
  • To elucidate the nutrient uptake and utilization efficiencies of rice under GMS practices.

Main Methods:

  • Field experiments were conducted to assess the effects of green manure and rice straw incorporation.
  • Different nitrogen fertilization rates were applied to evaluate their interaction with GMS on rice production.
Keywords:
milk vetchnutrient absorptionrice straw returnsoil nitrogen fertility

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  • Measurements included rice yield, nutrient uptake (N, P, K), nutrient use efficiencies, and soil fertility indicators (SOM, TK, NH4+-N, NO3--N).

    • Main Results:

    • Green manuring significantly enhanced rice yield and improved the uptake and utilization efficiencies of nitrogen (N), phosphorus (P), and potassium (K).
    • Green manure with a 40% N reduction (GM_N60) maintained grain and straw yields comparable to conventional N application, with N recovery efficiency reaching 45.52%.
    • The GMS treatment with 40% N reduction (GMS_N60) increased rice yield by 14.43% and K uptake by 9.43% compared to winter fallow with rice straw return and full N application (WFS_N100), demonstrating superior agronomic efficiencies for N, P, and K.

    Conclusions:

    • The combined application of green manure and rice straw (GMS) can sustain or increase rice yield while allowing for a 40% reduction in nitrogen fertilizer.
    • GMS practices significantly improve nutrient use efficiencies (N, P, K) and promote the reuse of rice straw, contributing to efficient and eco-friendly rice production.
    • Increased soil organic matter (SOM) and total potassium (TK) are key factors positively influencing rice yield and N uptake under GMS management in the southern Jiangsu paddy region.