ACTA AGRICULTURAE BOREALI-SINICA ›› 2021, Vol. 36 ›› Issue (6): 141-152. doi: 10.7668/hbnxb.20192116

Special Issue: Corn Soil fertilizer Hot Article

• Resources & Environment·Plant Protection • Previous Articles     Next Articles

Effects of Potassium Fertilizer Application on Growth and Yield of Maize Inbred Lines with Different Yield Types

FAN Yafang1, GAO Julin1, SUN Jiying1, LIU Jian2, SU Zhijun1, WANG Zhigang1, YU Xiaofang1, HU Shuping2   

  1. 1. Agricultural College, Inner Mongolia Agricultural University, Hohhot 010019, China;
    2. Vocational and Technical College, Inner Mongolia Agricultural University, Baotou 014109, China
  • Received:2021-09-08 Published:2021-12-28

Abstract: Twenty-one maize inbred lines were used to study the effects of potassium fertilizer on stem phenotype,stem lodging resistance,ear traits,yield-related traits and grain quality of maize inbred lines with different yield types.The results showed that compared with 0K,the stem diameter of high-yield,middle-yield and low-yield maize inbred lines under 45K treatment increased by 14.21%,11.60% and 8.41%;the bending strength of stem increased by 30.58%,27.52% and 24.59%;the ear diameter increased by 3.61%,2.57% and 1.72%;the ear tip barrenness decreased by 10.19%,7.41% and 4.81%;the 1000-grain mass increased by 4.97%,3.55% and 2.23%;the yield increased by 7.50%,5.57% and 4.45%;the grain protein content increased by 0.62,0.40,0.20 percentage points respectively.Application of potassium fertilizer could improve maize stem morphology and mechanical index,improve maize lodging resistance,promote maize plant growth and development,and then affect maize yield and quality.The results showed that high-yield type>middle-yield type>low-yield type of maize inbred lines with different yield types.The increase of plant height,ear height,stem diameter,stem puncture strength,stem compressive strength,stem bending strength,grain number per ear and 1 000-grain mass,as well as the decrease of ear tip barrenness of maize inbred lines could significantly improve maize yield. Therefore,the above indexes can be used as screening indexes of yield of maize inbred line under potassium fertilizer application.This experiment provided a theoretical basis for breeding high-yield and high-quality maize materials,selecting suitable basic materials for studying the physiological characteristics of maize inbred lines with different yield types,and provided a reference basis for high-yield and high-efficiency maize breeding and rational utilization of potassium fertilizer in China in the future.

Key words: Maize inbred line, Potassium fertilizer, Stem lodging resistance, Yield, Grain quality

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Cite this article

FAN Yafang, GAO Julin, SUN Jiying, LIU Jian, SU Zhijun, WANG Zhigang, YU Xiaofang, HU Shuping. Effects of Potassium Fertilizer Application on Growth and Yield of Maize Inbred Lines with Different Yield Types[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(6): 141-152. doi: 10.7668/hbnxb.20192116.

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