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This study aims to investigate the economic benefits of centrifugal VRF technology in precision agriculture. To this end, a specialized VRF fertilization device for rice and wheat was developed and field trials were conducted in the rice-wheat rotation zone of Dongtai City, Jiangsu Province, China. The Nanjing 9108 rice variety was selected as the research subject, with three methods—manual broadcast fertilization, conventional empirical balanced fertilization, and real-time VRF fertilization—compared. Data were continuously collected for 3 years to conduct systematic analysis. From the perspectives of total fertilizer application, crop growth, and yield, real-time VRF technology reduced the annual average fertilizer application to 47.64 kg/ha, nearly 15.88% less than traditional empirical fertilization methods. With a slight reduction in nitrogen application, VRF technology increased rice yield to 8996.70 kg/ha, a 5.93% improvement over traditional cultivation methods. This figure effectively enhanced nutrient utilization and significantly improved crop spatial distribution. Considering economic benefits, it saved 95.28 yuan/ha in chemical fertilizer costs and increased net rice production revenue to 1007.62 yuan/ha. To comprehensively evaluate the performance of the fertilization device, field trial research plans were developed based on ISO5690 and ASAE341.2 standards. When nitrogen fertilizer application rates were set at 225 kg/ha, 300 kg/ha, and 375 kg/ha respectively, effective laying widths were measured as 21.05 m, 22.58 m, and 23.67 m. The coefficients of variation (CV) within particle size ranges were 11.51%, 9.25%, and 11.28% respectively. The average deviation of the overlapping layering experiment was 4.54%, with a coefficient of variation (CV) of 11.94%, fully meeting current technical standards for lateral distribution. Experimental results demonstrate that this centrifugal variable fertilization device significantly reduces chemical fertilizer usage, enhances crop yields, and improves spatial distribution consistency in farmland. The overall system meets operational requirements, providing theoretical foundations and practical references for promoting precision agriculture equipment.

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Field Evaluation and Efficiency Analysis of Centrifugal Variable-Rate Fertilization in Precision Agriculture

  • 章节

  • 发表日期：

    2026年

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  • Yinyan Shi,
  • Xiaochan Wang,
  • Z. Zhao,
  • Xuekai Huang,
  • S. Hu,
  • Man Chen

摘要

This study aims to investigate the economic benefits of centrifugal VRF technology in precision agriculture. To this end, a specialized VRF fertilization device for rice and wheat was developed and field trials were conducted in the rice-wheat rotation zone of Dongtai City, Jiangsu Province, China. The Nanjing 9108 rice variety was selected as the research subject, with three methods—manual broadcast fertilization, conventional empirical balanced fertilization, and real-time VRF fertilization—compared. Data were continuously collected for 3 years to conduct systematic analysis. From the perspectives of total fertilizer application, crop growth, and yield, real-time VRF technology reduced the annual average fertilizer application to 47.64 kg/ha, nearly 15.88% less than traditional empirical fertilization methods. With a slight reduction in nitrogen application, VRF technology increased rice yield to 8996.70 kg/ha, a 5.93% improvement over traditional cultivation methods. This figure effectively enhanced nutrient utilization and significantly improved crop spatial distribution. Considering economic benefits, it saved 95.28 yuan/ha in chemical fertilizer costs and increased net rice production revenue to 1007.62 yuan/ha. To comprehensively evaluate the performance of the fertilization device, field trial research plans were developed based on ISO5690 and ASAE341.2 standards. When nitrogen fertilizer application rates were set at 225 kg/ha, 300 kg/ha, and 375 kg/ha respectively, effective laying widths were measured as 21.05 m, 22.58 m, and 23.67 m. The coefficients of variation (CV) within particle size ranges were 11.51%, 9.25%, and 11.28% respectively. The average deviation of the overlapping layering experiment was 4.54%, with a coefficient of variation (CV) of 11.94%, fully meeting current technical standards for lateral distribution. Experimental results demonstrate that this centrifugal variable fertilization device significantly reduces chemical fertilizer usage, enhances crop yields, and improves spatial distribution consistency in farmland. The overall system meets operational requirements, providing theoretical foundations and practical references for promoting precision agriculture equipment.