Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (4): 649-656.DOI: 10.3969/j.issn.1000-2561.2019.04.004

• Crop Culture and Nutrition,Genetic Breeding • Previous Articles     Next Articles

Responses of Sugarcane Varieties Growth to Nitrogen Fertilizer Application and Related Use Efficiency

LI Jin1,DUAN Tingting1,DENG Kai1,JING Zhanxin1,LIN Zhong1,LIANG Yanqiu1,DENG Zhuonan2,GAO Yu1,ZHENG Chao1,**()   

  1. 1. College of Chemistry and Environment, College of Agriculture, Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
    2. Faculty of Civil and Environmental Engineering, Technion-Israel Institute of Technology, Technion City, Haifa 3200003, Israel
  • Received:2018-06-07 Revised:2019-01-03 Online:2019-04-15 Published:2019-05-21
  • Contact: Chao ZHENG


The aim was to investigate the optimum nitrogen (N) fertilizer application for different sugarcanes varieties to conserve resources and reduce pollution. Using three main local sugarcanes varieties, ROC22, LC5136, and YT236, for experiments, 5 levels of N fertilizers quantities were set to study the effects of N fertilizer application on different sugarcanes varieties. The results showed that: (1) The weight of stem and yield of all three sugarcanes varieties increased with N fertilizers increased, followed by no significant change. The best application rate for ROC22 and LC5136 was 351.9 kg/hm 2, while that for YT236 was 234.6 kg/hm 2. The yield of ROC22 was the highest, which was more than LC5136 and YT236 for 8.6% and 40%, respectively. (2) The sugar yield of LC5136 and YT236 increased with increasing N fertilizer, followed by leveling off. The sugar yield of ROC22 with N application of 351.9 kg/hm 2 was significantly higher than no N application, but no obvious difference for different N applications. The average sugar yield of ROC22 was 20% and 57% higher than that of LC5136 and YT236. (3) The effect of N application on three sugarcanes varieties was different. With increasing N application, the use efficiency of N fertilizer of ROC22 and YT236 showed decreasing trend, reaching highest efficiency at 117.3 kg/hm 2. The use efficiency of N fertilizer of ROC22 was 10% higher than that of LC5316 and YT236. Considering the yield of sugarcanes, yield of sugar, and use efficiency of N fertilizer, the optimum N fertilizer application for ROC22 and LC5136 was 351.9 kg/hm 2, while that of YT236 was 234.6 kg/hm 2. The growth of ROC22 in the study area was obviously better than LC5136 and YT236.

Key words: sugarcane, crop yield, sugar yield, nitrogen fertilizer, fertilizer use efficiency