Crops ›› 2017, Vol. 33 ›› Issue (4): 129-133.doi: 10.16035/j.issn.1001-7283.2017.04.022

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Effects of Nitrogen Fertilization Rate on Grain Filling and Yield of Two Barley Varieties with Different Row Type

Wang Shujie,Feng Hui,Gao Zhanning,Xue Zhenggang,Yang Yongqian,Pan Zhengmao,Zhang Chunsheng   

  1. Zhumadian Academy of Agricultural Sciences,Zhumadian 463000,Henan,China
  • Received:2017-05-05 Revised:2017-06-12 Online:2017-08-15 Published:2018-08-26
  • Contact: Chunsheng Zhang
  • Supported by:
    162102110027

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Abstract:

In order to study the characteristics of grain filling and its relationship with grain weight and grain protein content of different barley varieties in row type, a field experiment with four nitrogen fertilization levels was carried out using six-rowed variety Zhudamai No.4 and two-rowed Zhudamai No.5 as materials. The results showed that the grain filling rate, protein content and yield were significantly related each other and the correlationship between grain filling rate and grain protein content was significantly negative. The grain filling rate were higher under the treatments in low N (75kg/hm 2) level than the treatments under middle (125kg/hm 2) and high N (225kg/hm 2) level before the grain filling peak. After that, the grain filling rate increased with the nitrogen level. In addition, the grain filling rate of Zhudamai No.5 was higher than that of Zhudamai No.4 under the same nitrogen level. The correlation analysis indicated that the relationship of grain weight and grain filling rate was positively correlated or highly positively correlated at 7, 14, 21d after anthesis, while the correlation was negative at 35d after anthesis for Zhudamai No.4; while for the correlation between grain weight and grain filling rate for Zhudamai No.5 was not significant. Before 21d after anthesis, grain filling rate were significantly or highly significantly negatively correlated with protein content for the two varieties. The maximal filling rate and average filling rate were highly significantly negative correlation with protein content.

Key words: Rowed type, Barley, Nitrogen fertilizer, Grain filling, Protein content, Yield

Table 1

Effects of nitrogen fertilizer rate on yield and its components of two barley varieties"

品种
Variety		 处理
Treatment		 产量(kg/hm2)
Grain yield		 穗粒数
Grain number per spike		 千粒重(g)
1000-grain weight		 有效穗数(104×hm2)
Spike number
驻大麦4号 N1 6 056.10d 47.72b 35.81a 520.71c
Zhudamai No.4 N2 7 278.05c 48.70b 34.95b 570.71b
N3 7 536.43b 50.03a 34.40b 637.14a
N4 7 715.88a 50.17a 33.46c 650.71a
驻大麦5号 N1 4 608.57d 25.73c 47.46a 458.40c
Zhudamai No.5 N2 6 178.59c 28.07b 44.46b 639.36b
N3 6 318.06b 29.27b 44.63b 659.29b
N4 6 393.31a 30.28a 44.44b 715.71a

Fig.1

Dynamic changes in grain filling rate curve of two barley varieties under different nitrogen rates"

Table 2

Simulation equation of grain filling process"

品种
Variety		 处理
Treatment		 模拟方程
Simulative equation		 理论最大千粒重(g)
Simulative 1000-grain weight		 实际最大千粒重(g)
Actual 1000-grain weight		 决定系数(R2)
Decision coefficient
驻大麦4号 N1 Y=38.4907/[1+EXP(3.1140-0.153330X)] 38.49 37.12 0.9992
Zhudamai No.4 N2 Y=37.3121/[1+EXP(3.1569-0.155583X)] 37.31 35.57 0.9997
N3 Y=37.0223/[1+EXP(3.3348-0.157078X)] 37.02 34.69 0.9988
N4 Y=36.1885/[1+EXP(3.4647-0.155809X)] 36.19 33.93 0.9997
驻大麦5号 N1 Y=50.7948/[1+EXP(3.3783-0.161907X)] 50.79 48.73 0.9993
Zhudamai No.5 N2 Y=50.4654/[1+EXP(3.5151-0.158404X)] 50.47 47.68 0.9996
N3 Y=51.2959/[1+EXP(3.7247-0.154167X)] 51.30 46.89 0.9996
N4 Y=50.1904/[1+EXP(3.9264-0.157449X)] 50.19 45.19 0.9986

"

品种
Variety		 指标 Index 花后天数Day after anthesis(d) Vm Va
7 14 21 28 35 40
驻大麦4号 Zhudamai No.4 千粒重 -0.97** -0.91* -0.97** -0.83 -0.91* 0.39 -0.95* -0.99**
子粒蛋白质含量 -0.98** -0.92* -0.96* -0.81 -0.88* -0.33 -0.96** -1.00**
驻大麦5号 Zhudamai No.5 千粒重 -0.75 -0.84 -0.73 -0.71 -0.66 -0.42 -0.95* -0.85
子粒蛋白质含量 -0.97** -0.96** -0.99** -0.83 -0.98** 0.04 -0.89* -0.99**
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