The Variance of Nitrogen Accumulation and Utilization in Different Summer Maize Cultivars and Its Response to Irrigation and Nitrogen Regulation

ZHANG Meiwei, LIU Jingbao, QIAO Jiangfang, LI Chuan, HUANG Lu, ZHANG Panpan, ZHAO Xia, LIU Weixing, NIU Jun

doi:10.15933/j.cnki.1004-3268.2020.01.002

Journal of Henan Agricultural Sciences >

2020 , Vol. 49 >Issue 1: 9 - 17

DOI: https://doi.org/10.15933/j.cnki.1004-3268.2020.01.002

Crop Cultivation & Genetic Breeding

The Variance of Nitrogen Accumulation and Utilization in Different Summer Maize Cultivars and Its Response to Irrigation and Nitrogen Regulation

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(1.Cereal Crops Institute,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;2.Henan Institute of Science and Technology Development Strategy,Zhengzhou 450002,China)

Received date: 2019-07-05

Online published: 2020-01-15

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Abstract

The field experiment was conducted to research the coupling effect of irrigation and nitrogen fertilizer on accumulation,transport,uptake and utilization of nitrogen in eleven summer maize cultivars,in order to explore the different responses of nitrogen uptake and nitrogen utilization to irrigation and nitrogen fertilizer among different maize cultivars.The two irrigation treatments were natural rainfall without irrigation(W0) and irrigation at flare opening stage and silking stage(W1),with 75 mm irrigation amount each.The three nitrogen fertilizer applications were 0 kg/ha(N0),150 kg/ha(N1) and 225 kg/ha(N2).The results showed that there were significant differences among different cultivars in nitrogen accumulation,transport,uptake and utilization.Variable coefficient of nitrogen fertilizer use efficiency(NUE)obtained the highest value of 20.97% among all parameters.It revealed the great significance of screening and cultivating high NUE cultivar.In order to study the response of maize cultivars with different NUE,eleven cultivars were classified into three classes by cluster analysis according to NUE. Irrigation and nitrogen fertilizer application increased nitrogen accumulation of three types of cultivars significantly.H-NUE and M-NUE cultivars had stronger stability to water and nitrogen condition than L-NUE cultivar.The highest plant nitrogen accumulation of H-NUE and M-NUE cultivars were obtained in the treatment of W1N2,while that of L-NUE cultivar was obtained in the treatment of W1N1.Irrigation and nitrogen fertilizer increased the nitrogen remobilization amount,while decreased the nitrogen translocation efficiency,nitrogen translocation contribution proportion and nitrogen harvest index.It also significantly influenced the nitrogen uptake efficiency of three types of cultivars,which reached the highest in W1N1 treatment.These indicate that appropriate reduction of nitrogen fertilizer application with rational irrigation is an effective way to improve nitrogen uptake and utilization of summer maize.

Key words： Summer maize; Cultivar; Nitrogen accumulation and utilization; Irrigation and nitrogen regulation

Cite this article

ZHANG Meiwei, LIU Jingbao, QIAO Jiangfang, LI Chuan, HUANG Lu, ZHANG Panpan, ZHAO Xia, LIU Weixing, NIU Jun . The Variance of Nitrogen Accumulation and Utilization in Different Summer Maize Cultivars and Its Response to Irrigation and Nitrogen Regulation[J]. Journal of Henan Agricultural Sciences, 2020 , 49(1) : 9 -17 . DOI: 10.15933/j.cnki.1004-3268.2020.01.002

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