Effects of Urea and Slow-release Compound Fertilizer Ratio under Deep Placement on Grain Yield and Physiological Traits of Rice
Received date: 2023-07-25
Online published: 2023-09-15
The aim of this study is to explore the effects of urea and slow-release fertilizer ratio under deep placement on grain yield and physiological traits of rice. The experiment used hybrid rice Qingxiangyou 19 Xiang and conventional rice Xiangya Xiang Zhan as materials, and set up four treatments（the ratio of urea and slow-release fertilizer mixed under deep placement as basal fertilizer in 6 cm soil depth was 1∶1, 1∶2, and 2∶1, marked as T1, T2 and T3 in rank, respectively; T4, no any fertilizer was applied in the whole growth period of rice). The results showed that for Qingxiangyou 19 xiang, the grain yield of T2 treatment significantly increased by 29.47%、43.49% and 73.56% compared to T1, T3 and T4 treatment, respectively. The leaf area index, dry matter accumulation, and NR, POD, and CAT activities of Qingxiangyou 19 and Xiangyaxiangzhan were significantly increased in T2 treatment compared with other treatments, but the content of MDA was significantly decreased in T2 treatment. Deep placement of urea and slow-release fertilizer in a ratio of 1∶2 was one kind of high-efficiency fertilization method.
Key words： rice; urea; slow-release fertilizer; deep placement; yield
LI Xiaomin, LI Yingqi, HE Zhenzhen, WU Yizhu, PAN Ganfeng, PAN Shenggang . Effects of Urea and Slow-release Compound Fertilizer Ratio under Deep Placement on Grain Yield and Physiological Traits of Rice[J]. China Rice, 2023 , 29(5) : 85 -88 . DOI: 10.3969/j.issn.1006-8082.2023.05.015
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