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Agricultural industry

Diversified Crop Rotation Systems Improve Grain Yield and Water Use Efficiency of Winter Wheat in China's North Plain

Strategic Insights

— 2 min read

Diversified crop rotation systems have been found to significantly improve grain yield and water use efficiency of winter wheat under limited irrigation conditions in China's North Plain. The research, conducted at China Agricultural University, examined the effects of diversified rotations on wheat yield and water use efficiency over a six-year period. The study found that grain yield and water use efficiency of wheat were higher in diversified rotations compared to a traditional wheat-maize cropping system. The results suggest that diversified spring crops-winter wheat rotations offer a sustainable and efficient strategy for enhancing wheat production and water conservation in dry areas.

Key Takeaways:

  • The research found that diversified crop rotation systems increased grain yield and water use efficiency of winter wheat by 16.7% and 9.6% in Cycle 1, 81.5% and 86.8% in Cycle 2, and 56.1% and 78.7% in Cycle 3 compared to a traditional wheat-maize cropping system.
  • The main contributors to the increments in grain yield and water use efficiency were spike number and aboveground biomass, which increased due to increased evapotranspiration during the middle-late wheat growth stages in diversified rotations.
  • The study revealed that diversified rotations enhanced synchronization of soil water supply with crop water demand by affecting the spatiotemporal dynamics of soil moisture under varied precipitation conditions.
  • The research was conducted at China Agricultural University and involved five treatments: wheat-maize cropping system (WM), spring maize - WM rotation, spring millet - WM rotation, spring peanut - WM rotation, and spring soybean - WM rotation.
  • The study found that the yield increases were higher in Cycle 1 (2015-2017) due to approximately 60% higher precipitation during the wheat growing season.

Statistics:

  • Grain yield of wheat was 33.8%-55.7% higher in Cycle 1, 81.5% higher in Cycle 2, and 56.1% higher in Cycle 3 in diversified rotations compared to the traditional wheat-maize cropping system.
  • Water use efficiency of wheat was 9.6% higher in Cycle 1, 86.8% higher in Cycle 2, and 78.7% higher in Cycle 3 in diversified rotations compared to the traditional wheat-maize cropping system.
  • The spike number and aboveground biomass were the main contributors to the increments in grain yield and water use efficiency in diversified rotations.
  • Approximately 60% higher precipitation during the wheat growing season in Cycle 1 resulted in higher yield increases.

Sources:

  • "Diversified rotation systems improve grain yield and water use efficiency of winter wheat under limited irrigation in the North China Plain." Crop Journal, 2025, 13(4): 1271-1280.
  • ScienceDirect: http://www.sciencedirect.com/science/journal/22145141/
  • doi: https://doi.org/10.1016/j.cj.2025.04.009
  • China Agricultural University: State Key Laboratory of Maize Bio-breeding, College of Agronomy and Biotechnology, Beijing 100193, People's Republic of China.
  • Authors: Lei Yang, Lang Cheng, Pin Wang, Huiling Zhao, Jie Zhao, Huadong Zang, Yadong Yang, Zhaohai Zeng.

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