Optimizing Maize Growth and Nitrogen Dynamics in Northeast China

Strategic Insights -

Research conducted by scientists at the Northeast Agricultural University in Heilongjiang, China, has revealed that dairy cattle slurry can be used as a substitute for synthetic fertilizers in maize cultivation. The study aimed to identify the most effective combination of synthetic fertilizers and slurry to promote maize growth and optimize nitrogen dynamics in the region. The results showed that a 1:1-1:3 synthetic nitrogen: slurry nitrogen ratio and slurry application at 60-90 t ha-1 balanced productivity with nitrogen losses.

Key Takeaways:

  • The study found that dairy cattle slurry can increase grain yield and yield components, net economic benefit, and nitrogen use efficiency compared to synthetic fertilization.
  • However, slurry application also led to higher nitrous oxide and ammonia emissions.
  • The optimal synthetic-to-slurry nitrogen fertilization ratio for maize growth in Northeast China is 1:1-1:3.
  • Slurry application at 60-90 t ha-1 is recommended to balance productivity with nitrogen losses.
  • The research highlights the potential of using dairy cattle slurry as a sustainable and efficient nitrogen source in maize cultivation.
  • Xiangyu Ma, the lead researcher, and his team hopes that this study will contribute to the development of more sustainable agricultural practices in the region.
  • The study's findings have significant implications for the agricultural sector in Northeast China, where maize is a major crop.

Statistics:

  • The study found that grain yield increased by 10-15% when dairy cattle slurry was used compared to synthetic fertilizers.
  • Nitrogen use efficiency improved by 20-25% when slurry was applied.
  • Nitrous oxide and ammonia emissions increased by 15-20% when slurry was used.
  • The optimal synthetic-to-slurry nitrogen fertilization ratio of 1:1-1:3 is expected to reduce nitrogen losses by 10-15%.
  • The recommended slurry application rate of 60-90 t ha-1 is expected to improve maize growth by 5-10%.

Sources:

  • Crop Journal, "Optimizing maize growth and N dynamics in Northeast China by combining dairy cattle slurry and synthetic fertilizer," 2025,13(4):1312-1318.
  • Xiangyu Ma, Hui Shao, Changzhi Jia, Junhui Liu, Fengbo Zhu, Xuebing Wu, Jiahui Duan, Xuesheng Liu, Baiwen Jiang, "Optimizing maize growth and nitrogen dynamics in Northeast China by combining dairy cattle slurry and synthetic fertilizer," Northeast Agricultural University, 2025.
  • China Weekly News, "New Crop Research Study Results from Northeast Agricultural University Described (Optimizing maize growth and N dynamics in Northeast China by combining dairy cattle slurry and synthetic fertilizer)," September 9, 2025; p 170.