Effect of Combined Application of Slow-Release and Conventional Urea on Yield and Nitrogen Use Efficiency of Rice and Wheat under Full Straw Return
Zhixuan Yu,
Ziyi Shen,
Lu Xu,
Jie Yu,
Li Zhang,
Xukui Wang,
Guangde Yin,
Wenjie Zhang,
Yunlong Li,
Wengang Zuo,
Yuhua Shan,
Zhongyang Huo,
Yanchao Bai
Affiliations
Zhixuan Yu
College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
Ziyi Shen
College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
Lu Xu
College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
Jie Yu
Jiangsu Cultivated Land Quality and Agro-Environment Protection Station, Nanjing 210000, China
Li Zhang
Jiangsu Cultivated Land Quality and Agro-Environment Protection Station, Nanjing 210000, China
Xukui Wang
Jiangsu Cultivated Land Quality and Agro-Environment Protection Station, Nanjing 210000, China
Guangde Yin
Jiangsu Cultivated Land Quality and Agro-Environment Protection Station, Nanjing 210000, China
Wenjie Zhang
College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
Yunlong Li
College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
Wengang Zuo
College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
Yuhua Shan
College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
Zhongyang Huo
Co-Innovation Center for Modern Production Technology of Grain Crop, Jiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225127, China
Yanchao Bai
College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
The effects of one-time basal application of different mixtures of slow-release urea (SRU) and conventional urea (CU) on yield and nitrogen use efficiency (NUE) of rice and wheat were investigated to determine the appropriate ratios of SRU to CU for one-time basal fertilization in a rice–wheat rotation farmland under full residue incorporation. A field plot experiment was used in this study. Six treatments were established as follows: CK (no nitrogen fertilizer applied), T0 (100% CU, 50% applied as basal fertilizer and 50% applied as jointing fertilizer), T3 (one-time basal application of SRU and CU mixture with 30% SRU), T5 (one-time basal application of SRU and CU mixture with 50% SRU), T7 (one-time basal application of SRU and CU mixture with 70% SRU), and T10 (one-time basal application of 100% SRU). The results showed that the combined application of SRU and CU increased the yields of rice and wheat. Treatment T7 resulted in the highest rice yield, and T3 resulted in the highest wheat yield, which were 25.6% and 29.4% higher, than those of treatment T0, respectively. Compared with treatment T0 (application of CU alone), the combined application of SRU and CU resulted in 27.4–96.5% and 22.8–57.1% higher NUE in rice and wheat, respectively.
