Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (4): 852-858.DOI: 10.16178/j.issn.0528-9017.20240941

Previous Articles     Next Articles

Effects of blend ratio of controlled⁃release urea and normal urea on agronomic traits and yield of summer maize

LI Tingting1(), SHEN Yanhui1, YUE Yongxiang1, NI Weiqian1, SHI Yulong2, GUO Wusong1, JIA Ruifeng1, XIAO Chenxing1, GAO Luyang1, CHEN Hongkun1()   

  1. 1.Xinyangfeng Agricultural Technology Co. ,Ltd. ,Hubei Provincial Engineering Research Center of Efficient Utilization of Nutrient Resources,Jingmen 448000,Hubei
    2.Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beijing 100081
  • Received:2024-12-10 Online:2026-04-11 Published:2026-04-17
  • Contact: CHEN Hongkun

Abstract:

To explore the optimal blending ratio of controlled-release urea(CRU)and normal urea in maize production,a field experiment was conducted to investigate the effects of different CRU blending ratios(0,30%,50%,70%,and 100%)on the agronomic traits and yield of summer maize. The results showed that the treatment with 70% CRU significantly (p<0.05) increased stem diameter,stem diameter coefficient,kernels per row,kernels per ear,100-kernel weight,yield, nitrogen partial factor productivity,soil alkali-hydrolyzable nitrogen content,and economic benefits. Among these,the yield and net profit increased significantly by 17.08% and 20.60%,respectively,compared with the normal urea alone treatment. When the CRU blending ratio reached 71.2%,the theoretical yield peaked at 9 510.02 kg·hm-2,with an economic benefit of 17 631.9 yuan?hm-2. Correlation analysis indicated that soil alkali-hydrolyzable nitrogen content,stem diameter,effective ear length,kernels per row,rows per ear,kernels per ear,and 100-kernel weight were all significantly positively correlated with yield. In conclusion,blending CRU with normal urea enhanced soil nitrogen supply capacity during the later growth stages of maize,optimized agronomic traits,improved maize resistance to downfall,and ultimately increased yield and economic benefits,with an optimal blending ratio of 71.2%.

Key words: summer maize, controlled-release nitrogen fertilizer, blending ratio, yield

CLC Number: