灰色关联度分析法和DTOPSIS法对青贮玉米新品种综合评估的比较分析

doi:10.12190/j.issn.2096-1197.2021.01.02

Abstract

Abstract: 【Objective】 To comprehensively evaluate the silage corn new varieties and provide basis for the promotion of silage corn.【Methods】 Grey correlation analysis and DTOPSIS method were utilized to comprehensively analysis 13 traits of the 12 varieties from the national regional test of silage corn in Huang-Huai-Hai area in 2014. And the two methods were compared by the maximum difference rate method and discrimination method.【Results】 The two methods could make objective and comprehensive evaluation for the varieties. Among them,the biological dry weight of silage corn variety Dajingjiu 26 was 18 742.5 kg/hm²,12.5% higher than that of the control,which reached a very significant level（P<0.01）. The biological dry weight of it ranked the first obtained in the two methods. The variety,Dajingjiu 26,had the characteristics of moderate growth period,lodging resistance,small leaf spot resistance,low content of neutral detergent fiber and high starch content. The results of variance analysis of biological dry weight of the 12 varieties were in the order of V₉>V₁>V₁₀>V₇>V₃>V₅>V₁₂>V₄>V₂>V₈>V₁₁>V₆. For the biological dry weight of the varieties,the rank correlation coefficients of grey correlation analysis and DTOPSIS method were 0.930 1 and 0.902 1 respectively,and the two comprehensive analysis methods could truly reflect the advantages and disadvantages of the silage corn varieties. The maximum difference rate of Ci of DTOPSIS method was 84.6%,and the discrimination degree was 0.733 3,which was better than that of grey correlation analysis.【Conclusion】 DTOPSIS method could easy to distinguish the advantages and disadvantages of the tested varieties,and it was also a better method for comprehensive evaluation of silage corn varieties.

Key words: Silage corn, Grey correlation analysis, DTOPSIS method, Comprehensive evaluation

CLC Number:

S513

DING Ning, ZHANG Yuqiang, ZHANG Shenju. Comparative analysis of comprehensive evaluation of silage corn new varieties by grey correlation analysis and DTOPSIS method[J].Journal of Northern Agriculture, 2021, 49(1): 10-16.

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Comparative analysis of comprehensive evaluation of silage corn new varieties by grey correlation analysis and DTOPSIS method

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