Acta Agriculturae Boreali-Sinica ›› 2025, Vol. 40 ›› Issue (2): 127-138. doi: 10.7668/hbnxb.20195365

Special Issue: Wheat Soil fertilizer

• Resources & Environment·Plant Protection • Previous Articles     Next Articles

The Effect of Nitrogen Application Rate on Yield and Nitrogen Utilization of Two-line Hybrid Wheat

HAO Xiaocong, HOU Qiling, GAO Jiangang, YUE Jieru, AN Chunhui, WANG Changhua, YANG Jifang, BAI Xiucheng, SUN Hui, ZHAO Changping, ZHANG Fengting   

  1. Institute of Hybrid Wheat,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,China
  • Received:2024-08-19 Published:2025-04-28

Abstract:

To provide theoretical basis and technical support for rational nitrogen fertilizer management in high-yield cultivation of hybrid wheat,this study aims to investigate the effects of nitrogen application rate on yield formation,dry matter accumulation and distribution,nitrogen absorption and utilization,as well as the nitrogen absorption ratio of wheat fertilizers in two-line hybrid wheat.From 2020 to 2021,three two-line hybrid wheat combinations and one conventional variety were used as materials.A split plot design was adopted,with nitrogen (labeled with 15N urea) treatment as the main zone and varieties as sub zones.Four nitrogen level experiments were set up at N0,N120,N180,and N240.The dry matter accumulation and distribution,plant nitrogen absorption and utilization,and grain yield of wheat organs were analyzed and measured under different treatments during the flowering and maturity stages.The results demonstrated that a highly significant effect of nitrogen application rate and combination (variety) on wheat yield and yield components.Compared with the conventional varieties Jingdong 17,the average yield of Jingmai 21 and BH9613 increased by 10.47% and 4.07% respectively,mainly due to their higher number of spikes and grains per ear.The application of nitrogen fertilizer significantly increased the number of spikes and grains per ear of wheat,but reduced the thousand grain weight.The application of nitrogen fertilizer to four varieties significantly increased the accumulation of dry matter in wheat during the flowering and maturity stages.The dry matter weight of various organs in wheat during the flowering stage was as follows:stem>leaf>spike,and during the maturity stage,it was as follows:grains>stem>spike-stalk+glume >leaf.The average values of nitrogen fertilizer agronomic utilization efficiency and nitrogen fertilizer partial productivity under different nitrogen application rates were as follows:Jingmai 21>BH9613>Jingdong 17>BH3606,which was consistent with the yield trend.The 15N atomic percentage of the four combinations (varieties),the nitrogen content from fertilizer,and the proportion of nitrogen from fertilizer all showed the following order:grains>straw,and they significantly increased with the increase of nitrogen application rate.Compared with Jingdong 17,the proportion of soil nitrogen in the three hybrid combinations (varieties) significantly increased,indicating that hybrid wheat had stronger tolerance to barrenness from the perspective of nitrogen utilization.After comprehensive consideration and analysis,the nitrogen application rate of N240 significantly increased wheat yield compared to other treatments,making it the optimal nitrogen fertilizer application rate for wheat cultivation.The comprehensive performance of the two hybrid combinations (varieties) of Jingmai 21 and BH9613 is better than the performance of the control Jingdong 17.

Key words: Two-line hybrid wheat, Nitrogen application rate, Dry matter accumulation, Nitrogen allocation and utilization, Yield, 15N urea

Cite this article

HAO Xiaocong, HOU Qiling, GAO Jiangang, YUE Jieru, AN Chunhui, WANG Changhua, YANG Jifang, BAI Xiucheng, SUN Hui, ZHAO Changping, ZHANG Fengting. The Effect of Nitrogen Application Rate on Yield and Nitrogen Utilization of Two-line Hybrid Wheat[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(2): 127-138. doi: 10.7668/hbnxb.20195365.

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