Crops ›› 2018, Vol. 34 ›› Issue (2): 118-122.doi: 10.16035/j.issn.1001-7283.2018.02.021

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Yield Potential, Yield Gap and Nitrogen Use Efficiency Gap of Winter Wheat in Hebei Province

Huang Shaohui1,Yang Yunma1,Liu Ketong2,Sun Yanming1,Yang Junfang1,Jia Liangliang1   

  1. 1 Institute of Agricultural Resources and Environment, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, Hebei, China
    2 Soil and Fertility Station of Hebei Province, Shijiazhuang 050021, Hebei, China
  • Received:2017-12-04 Revised:2018-02-12 Online:2018-04-20 Published:2018-08-27

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Abstract:

In order to understand the yield potential, yield gap and nitrogen use efficiency gap in Hebei, a systematic research was conducted based on the dataset which was built by the National Soil Testing and Formulated Fertilization Project in Hebei Province. The wheat yield in the dataset was divided into 4 wheat yielding levels including farmers’ average yield, farmers’ high yield, prescription fertilization yield, and high yielding record, and 3 yield gaps (YG) were calculated, and related N use efficiency of PFP-N were calculated according to the 4 yield levels. The results showed the farmers’ average yield, farmers’ high yield, prescription fertilization yield, and high yielding record were 6.48, 8.38, 7.05, 9.89t/hm 2, respectively, and the YG1, YG2 and YG3 were 1.89, 0.56, 3.41t/hm 2, respectively. The Handan had the highest yield potential and yield gaps, Baoding and Cangzhou had the lowest yield potential, and Cangzhou and Hengshui had the lowest yield gaps. The PFP-N for farmers average yield, farmers, high yield, prescription fertilization yield, and high yielding record were 25.3, 31.0, 32.1, 43.1kg/kg, respectively, and correspondent nutrient use efficiency gaps of PFPG1-N, PFPG2-N and PFPG3-N were 5.6, 6.7, 17.8kg/kg, respectively. Handan had the highest PFP gaps, Xingtai had the lowest.

Key words: Hebei Province, Winter wheat, Yield potential, Yield gap, Nitrogen use efficiency, PFP-N

Table 1

Distribution of samples for winter wheat fertilization experiments in Hebei Province"

邯郸Handan 邢台Xingtai 衡水Hengshui 石家庄Shijiazhuang 保定Baoding 沧州Cangzhou 廊坊Langfang 全部Total
190 249 67 137 90 103 103 939

Fig.1

Conceptual framework of yield level and yield gap"

Fig.2

Yield potentials and yield gaps of winter wheat in Hebei Province"

Table 2

The yield potentials and yield implementation levels of winter wheat in Hebei Province t/hm2"

地区
Region		 产量Yield 产量差Yield gap
高产纪录
High yielding record		 配方施肥
Prescription fertilization		 高产农户
High-yield farmer		 一般农户
Average farmer		 YG1 YG2 YG3
廊坊Langfang 9.47±0.07 9.41±1.42 8.43±0.34 6.20±0.99 2.23 3.21 3.27
保定Baoding 8.34±0.13 6.78±0.45 7.72±0.41 6.16±0.50 1.57 0.62 2.18
沧州Cangzhou 8.50±0.24 8.29±1.08 7.79±0.31 5.64±0.11 2.15 2.65 2.86
石家庄Shijiazhuang 9.81±0.34 9.31±0.57 8.56±0.39 6.89±0.65 1.67 2.42 2.92
衡水Hengshui 9.24±0.40 9.03±0.46 8.68±0.16 7.37±0.48 1.32 1.66 1.87
邢台Xingtai 9.15±0.27 8.88±0.75 8.46±0.46 6.65±0.73 1.82 2.23 2.50
邯郸Handan 11.43±0.31 10.14±0.70 8.13±0.43 6.28±0.72 1.85 3.86 5.15

Fig.3

PFP-N status and PFP-N gaps of winter wheat in Hebei Province"

Table 3

N input and PFP-N of winter wheat in Hebei Province"

地区
Region		 氮肥投入量N input (kg/hm2) 氮肥偏生产力PFP-N (kg/kg)
高产纪录
High yielding
record		 配方施肥
Prescription
fertilization		 高产农户
High-yield
farmer		 一般农户
Average
farmer		 高产纪录
High yielding
record		 配方施肥
Prescription
fertilization		 高产农户
High-yield
farmer		 一般农户
Average
farmer
廊坊Langfang 270.0 231.1 239.9 240.8 35.0 29.6 35.2 27.5
保定Baoding 222.0 232.6 239.3 235.2 38.1 30.2 32.5 27.8
沧州Cangzhou 285.0 210.3 335.2 281.0 30.2 29.5 24.5 20.8
石家庄Shijiazhuang 233.5 214.1 238.8 249.6 43.2 34.8 37.9 30.1
衡水Hengshui 241.0 250.3 294.5 288.3 39.2 33.4 29.7 28.8
邢台Xingtai 225.0 267.3 334.8 281.0 26.1 29.3 28.1 24.7
邯郸Handan 165.0 205.6 299.8 294.9 43.0 36.7 28.3 22.4
平均Average 234.5 230.2 283.2 267.2 36.4 31.9 30.9 26.0

Fig.4

The PFP-N gaps of winter wheat in Hebei Province"

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