Crops ›› 2016, Vol. 32 ›› Issue (2): 89-94.doi: 10.16035/j.issn.1001-7283.2016.02.016

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Effects of Drought Stress at Jointing Stage on Yield and Drought Resistance in Spring Maize

Liu Huatao1,2,Huang Xuefang1,Huang Mingjing1,Chi Baoliang1,Zheng Xiuqing2,Chen Junfeng2   

  1. 1 College of Water Resources Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China
    2 Arid Farming Research Center,Shanxi Academy of Agricultural Sciences,Taiyuan 030031,Shanxi,China
  • Received:2015-10-19 Revised:2016-01-26 Online:2016-04-15 Published:2018-08-26
  • Contact: Baoliang Chi

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Abstract:

In the field of arid zones, the mainly planted and high density-resistant maize varieties of current production were selected to be studied the relationship between yield components and drought resistance at jointing stage. The results showed that there was significant positive correlation between 100-grain weight and yield under different degrees drought stress. With the increase of drought stress, the grain number per kernel played a direct effect on yield, while grain number per kernel and grain number per row had positive correlation each other. The 100-grain weight was the primary factor to decide yield, followed by grain number per kernel, but grain number per kernel was determined by grain number per row. Evaluation of drought resistance showed that Dafeng 30 could get a better yield but drought resistance was general, Fuyou 968 had a strong drought resistance, but with a low yield, and both yield and drought resistance of Luyu 36 were poor.

Key words: Maize, Jointing stage, Drought, Yield components, Drought resistance

Fig.1

Rainfall data of experimental field in 2014"

Fig.2

Change of 0-160cm soil water storage under drought stress in jointing stage"

Table 1

Correlation analysis of yield characters and yield of different maize varieties under different drought stress"

灌溉量Irrigation amount 相关系数
Index of correlation		 穗行数
Rows per ear
(RPE)		 行粒数
Kernels per row
(KPR)		 穗长
Ear length
(EL)		 穗粗
Ear diameter
(ED)		 穗粒数
Kernels per ear
(KPE)		 百粒重
Hundred kernel weight
(HKW)		 产量
Yield
正常供水
Normal water supply		 穗行数RPE 1
行粒数KPR -0.22 1
穗长EL -0.61* 0.24 1
穗粗ED 0.68** -0.11 -0.49 1
穗粒数KPE 0.43 0.51* -0.27 0.18 1
百粒重HKW 0.28 0.10 0.20 0.31 0.40 1
产量Yield 0.41 0.33 0.03 0.54* 0.61* 0.84** 1
中度干旱胁迫
Moderate drought stress		 穗行数RPE 1
行粒数KPR 0.07 1
穗长EL -0.03 0.71** 1
穗粗ED 0.55* 0.30 -0.14 1
穗粒数KPE 0.49 0.80** 0.61* 0.46 1
百粒重HKW 0.32 0.19 0.27 0.48 0.50 1
产量Yield 0.55* 0.58* 0.49 0.66** 0.84** 0.83** 1
重度干旱胁迫
Severe drought stress		 穗行数RPE 1
行粒数KPR 0.08 1
穗长EL -0.08 0.61* 1
穗粗ED 0.60* 0.06 -0.08 1
穗粒数KPE 0.58* 0.76** 0.43 0.48 1
百粒重HKW 0.43 -0.20 -0.35 0.63** 0.11 1
产量Yield 0.60* 0.38 0.10 0.75** 0.70** 0.76** 1

Table 2

Path analysis of yield characters and yield of maize varieties under normal water supply"

因子Factor 直接效应Direct effect 穗长Ear lenght(EL) 穗粗Ear diameter(ED) 穗粒数Kernels per ear(KPE) 百粒重Hundred kernel weight(HKW)
穗长EL 0.2619 -0.2195 -0.1113 0.0954
穗粗ED 0.4448 -0.1293 0.0723 0.1492
穗粒数KPE 0.4123 -0.0707 0.0780 0.1942
百粒重HKW 0.4837 0.0517 0.1372 0.1656
决定系数=0.90433 剩余通径系数=0.30931

Table 3

Path analysis of yield characters and yield of maize varieties under moderate drought stress"

因子
Factor		 直接效应
Direct effect		 穗行数
Rows per ear(RPE)		 穗长
Ear length(EL)		 穗粒数
Kernels per ear(KPE)		 百粒重
Hundred kernel weight(HKW)
穗行数RPE 0.1165 -0.0072 0.1369 0.1457
穗长EL 0.2432 -0.0035 0.1718 0.1216
穗粒数KPE 0.2804 0.0569 0.1490 0.2242
百粒重HKW 0.4513 0.0376 0.0655 0.1393
决定系数=0.98182 剩余通径系数=0.13485

Table 4

Path analysis of yield characters and yield of maize varieties under severe drought stress"

因子Factor 直接效应Direct effect 穗长Ear length(EL) 穗粒数Kernels per ear(KPE) 百粒重Hundred kernel weight(HKW)
穗长EL 0.1136 0.2453 -0.2561
穗粒数KPE 0.5684 0.0490 0.0802
百粒重HKW 0.7407 -0.0393 0.0616
决定系数=0.97330 剩余通径系数=0.16341

Fig.3

Difference analysis of yield of maize varieties under drought stress at jointing stage"

Table 5

Yield reduction range of different maize varieties under drought stress at jointing stage %"

胁迫处理Stress treatment 康地4574 Kangdi 4574 大丰30Dafeng 30 京科968Jingke 968 潞玉36Luyu 36 富友968Fuyou 968
中度干旱胁迫Moderate drought stress 8.2 0.5 4.3 11.4 8.7
重度干旱胁迫Severe drought stress 12.5 17.7 14.6 27.0 10.0
重度干旱胁迫较中度干旱胁迫
Compare to moderate drought stress		 4.6
 17.3
 10.7
 17.6
 1.4

Fig.4

Analysis of drought resistance and tolerance index of maize varieties under drought stress at jointing stage"

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