Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (5): 998-1008.DOI: 10.3969/j.issn.1004-1524.20240387

• Crop Science • Previous Articles     Next Articles

Differential responses of yield, quality, and nitrogen use efficiency to nitrogen application rate in high- and low-oil content rapeseed varieties

DONG Zhichao(), YUE Ningyan, LYU Wei, YU Xiaoyi, ZHENG Kaiwen, SONG Haixing, CHEN Haifei()   

  1. Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resource, Hunan Agricultural University, Changsha 410128, China
  • Received:2024-04-29 Online:2025-05-25 Published:2025-06-11

Abstract:

To compare the differences in yield, quality, and nitrogen use efficiency (NUE) responses to nitrogen (N) application rate between high-and low-oil content rapeseed varieties, a field experiment was conducted using high-oil content variety E01 and low-oil content variety E08. Five N treatments (N0, N60, N180, N240, N360, representing 0, 60, 180, 240, and 360 kg·hm-2 of pure N, respectively) were applied. Yield, total nitrogen content, oil content, and related indicators were measured at maturity, and NUE and oil yield were calculated. The results showed that the yield and NUE-related parameters of E01 were significantly higher than those of E08. Although N application significantly reduced the seed oil content of the high-oil content variety E01, the yield-enhancing effect of N on E01 far outweighed its inhibitory effect on oil content, resulting in significantly higher oil yield and protein yield in E01 compared to E08. Additionally, the maximum oil yields of 1 316 kg·hm-2 and 602 kg·hm-2 were achieved for E01 and E08 at N application rates of 245 kg·hm-2 and 227 kg·hm-2, respectively. Comprehensive analysis indicated that under the same N application rate, the high-oil content variety E01 exhibited higher oil yield and NUE, demonstrating greater potential for high efficiency nitrogen utilization in rapeseed production.

Key words: Brassica napus L., fertilization amount, yield, oil yield, nitrogen use efficiency

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