Effects of Controlled Release Urea Formula and Conventional Urea Ratio on Grain Yield and Nitrogen Use Efficiency of Direct-Seeded Rice
Shuang Cheng,
Zhipeng Xing,
Chao Tian,
Shaoping Li,
Jinyu Tian,
Qiuyuan Liu,
Yajie Hu,
Baowei Guo,
Qun Hu,
Haiyan Wei,
Hui Gao,
Hongcheng Zhang
Affiliations
Shuang Cheng
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Zhipeng Xing
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Chao Tian
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Shaoping Li
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Jinyu Tian
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Qiuyuan Liu
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Yajie Hu
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Baowei Guo
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Qun Hu
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Haiyan Wei
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Hui Gao
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
Hongcheng Zhang
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
A one-off application of bulk blend urea (BBU), which includes a controlled release urea formula and conventional urea, has been recommended to simplify fertilisation management for direct-seeded rice. However, the effects of different basal application ratios of controlled-release urea formula and conventional urea on yield and nitrogen (N) use efficiency remain unknown in direct-seeded rice. This study set up three BBU treatments in which the controlled-release urea formula provided 50% (BBU1), 60% (BBU2), and 70% (BBU3) of the total N. This study measured their effects on grain yield and N use efficiency of direct-seeded rice. Split fertilisation with conventional urea was used as the control (CK). The study concluded four key points: (i) the grain yield of direct-seeded rice decreased as the proportion of controlled-release urea formula increased, (ii) BBU1 increased grain yields by 8.1–8.6% and 10.2–10.6% compared to BBU2 and BBU3, respectively, as well as a greater number of panicles and spikelets per m2, and post-anthesis dry matter accumulation, (iii) the N recovery efficiency and N agronomic efficiency of BBU1 were significantly higher than those of BBU2 and BBU3 treatments, and the nitrogen accumulation was also found to be more, and (iv) compared with the CK, BBU1 achieved considerable grain yield and nitrogen use efficiency while reducing the amount of fertilisation. In conclusion, the appropriate reduction of the basal application ratio of the controlled-release urea formula for direct-seeded rice increased grain yield and nitrogen use efficiency.
