HUBEI AGRICULTURAL SCIENCES ›› 2022, Vol. 61 ›› Issue (14): 19-23.doi: 10.14088/j.cnki.issn0439-8114.2022.14.003

• Breeding & Cultivation • Previous Articles     Next Articles

Study on rice yield and fertilizer utilization efficiency under side deep fertilization

LU Yu1, XU Nan-qing2, DUAN Jian-she2, ZHU Hong-ying2, HONG Guo2, LING Dong3, ZHENG Dong-xiao1, MAN Jian-guo1   

  1. 1. MARA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River,College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070,China;
    2. Xiangzhou Agricultural Technology Extension Center, Xiangyang 441104,Hubei,China;
    3. Xiangyang Academy of Agricultural Sciences,Xiangyang 441104, Hubei,China
  • Received:2021-08-23 Online:2022-07-25 Published:2022-08-25

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Abstract: Clarifying the characteristics of rice yield, fertilizer absorption and utilization under mechanical side deep fertilization is important to further improve rice yield and resource utilization efficiency in the middle and lower reaches of the Yangtze River. Field experiments were conducted in 2020, two fertilization methods were set, mechanical side deep fertilization （S） and conventional manual fertilization （C）, five fertilizer combination treatments were set, no fertilizer during the whole season as control （CK）, applied NPK （NPK）, only applied PK （PKN0）, only applied NK （NKP0） and only applied NP （NPK0）. Compared with the traditional method, mechanical side deep fertilization could effectively improve the number of panicles per unit area and dry matter at maturity, then improve rice yield. The grain yield of NPK treatment was the highest, with an average of 7 342.1 kg/hm2, followed by NP treatment, and the lowest was PK treatment. The dry matter of stem plus leaf, and grain from NPK treatment was the highest, followed by NP and NK treatments, PK treatment was the lowest. The nitrogen accumulation of rice plants under mechanical side deep fertilization was lower than traditional pattern, but the potassium accumulation was higher. There were no significant differences in phosphorus accumulation between them. However, the fertilizer agronomic efficiency （AEF）, partial factor productivity （PFPF）, and the nitrogen and phosphorus physiological utilization efficiency （PEN, PEP） were higher. The accumulation of nitrogen, total nitrogen, total phosphorus and total potassium in the rice plant organ was NPK treatment > NP treatment > NK treatment > PK treatment. The AEN, PEN and PFPN were the highest in NPK treatment. The phosphorus and potassium utilization efficiency from treatment with nitrogen was higher than those treatments without nitrogen. Thus, mechanical side deep fertilization can effectively improve rice yield and fertilizer utilization efficiency. It is an important fertilization pattern for large-scale, simplified, high-yield and high-efficient production of rice.

Key words: rice, side deep fertilization, fertilizer use efficiency, yield

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