Crops ›› 2016, Vol. 32 ›› Issue (5): 119-123.doi: 10.16035/j.issn.1001-7283.2016.05.020

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Nitrogen Fertilization Ratio on Grain Yield and Nitrogen Use Efficiency of Mechanical Transplanting Rice

Luo Wenji1,Jiang Ligeng2,Qin Liling2,Liang Tianfeng3,Luo Bijing2   

  1. 1 College of Forestry,Guangxi University,Nanning 530004,Guangxi,China
    2 College of Agronomy,Guangxi University,Nanning 530004,Guangxi,China
    3 Rice Institute,Guangxi Academy of Agricultural Sciences,Nanning 530007,Guangxi,China
  • Received:2016-06-06 Revised:2016-08-09 Online:2016-10-15 Published:2018-08-26
  • Contact: Ligeng Jiang

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Abstract:

With Teyou 7571 as test material, a field experiment was conducted to study effects of nitrogen fertilization ratio on grain yield and nitrogen use efficiency of mechanical transplanting rice, assigning proportion of base, tillering and panicle nitrogen fertilizer as 6:3:1(N1),5:3:2(N2) and,4:3:3(N3). The results showed that the grain yield and nitrogen use efficiency of N3 was significantly higher than those of N2 and N1, and its 1000-grain weight, seed setting rate, dry matter, LAI and nitrogen accumulation in late growth period were higher than other two nitrogen treatments, but its stem tillers and effective panicles was slightly lower than application (N1). Therefore, increasing tillers and panicle fertilizer proportions can improve the mechanical transplanting rice nitrogen and dry matter accumulation in mid and late growing periods and obtain high gain yield.

Key words: Mechanical transplanting rice, Nitrogen fertilization ratio, Nitrogen use efficiency, Yield

Fig.1

Different proportion of base,tillering and panicle nitrogen fertilizer on tillers of mechanical transplanted rice"

Table 1

Effects of nitrogen fertilization patterns on leaf area index of mechanical transplanted rice"

处理Treatments 拔节期Elongation 抽穗期Heading 成熟期Maturation 叶面积衰减率The attenuation rate of leaf area(%)
CK 2.2±0.62bB 4.5±1.91cC 2.4±0.91bB 46.67
N1 4.6±0.90aA 9.9±0.86aA 5.3±0.56aA 48.03
N2 4.3±0.29aAB 8.0±1.03bB 6.1±1.73aA 23.75
N3 4.3±0.40aAB 9.7±0.88aA 6.5±0.79aA 28.86

Table 2

Effects of nitrogen fertilization patterns on yield and yield components of mechanical transplanted rice"

处理
Treatments		 穗数(万/hm2)
Panicle number		 每穗颖花数
Grains per panicle		 每穗实粒数
Filled grains per panicles		 结实率(%)
Seed setting rate		 千粒重(g)
1000-grain weight		 产量(t/hm2)
Yield
CK 187.35dD 114.8dC 85.1dC 74.2cB 26.3cC 5.20±0.013cB
N1 354.9aA 162.5bB 127.7bB 78.6bB 27.9bB 7.30±0.027abA
N2 329.4bB 157.6cB 118.9cB 75.4bcB 28.8bB 7.17±0.026bA
N3 311.7cC 177.2aA 158.9aA 89.7aA 29.2aA 7.50±0.01aA

Table 3

Effects of different nitrogen fertilization patterns on dry matter accumulation of mechanical transplanted rice t/hm2"

处理Treatments 拔节期Elongation 抽穗期Heading 成熟期Maturation 相对增加量The relative amount
CK 1.81±0.37bB 9.94±0.63cC 12.75±0.80dC 2.81
N1 3.60±0.60aA 15.10±0.16aAB 20.22±0.57bA 5.12
N2 3.08±0.27aA 13.65±0.82bB 16.56±0.36cB 2.91
N3 3.21±0.37aA 16.00±0.23aA 21.85±1.00aA 5.85

Fig.2

Effects of nitrogen fertilization patterns on N uptake amount and distribution above ground plants of mechanical transplanted rice"

Table 4

Effects of nitrogen fertilization patterns on nitrogen use efficiency of mechanical transplanted rice"

处理
Treatments		 吸收利用率(%)
Utilization rate		 农学利用率(kg/kg)
Agriculture utilization		 偏生产力(kg/kg)
Partial factor productivity		 生理利用率(kg/kg)
Physiological efficiency
CK - - - -
N1 35.83 10.00 34.76 27.91
N2 28.81 9.38 34.14 32.56
N3 47.43 10.95 35.71 23.09
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