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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (4): 68-78.DOI: 10.11686/cyxb2022148

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Adaption to the Plateau climate in Qinghai of 39 silage maize varieties cultivated in different ecological regions of China

Li-li ZHU1,2,3(), Ye-meng ZHANG1,2,3, Wan-cai LI4, Ya-li ZHAO5, Xiang LI1,2,3, Zhi-guo CHEN1,3()   

  1. 1.Northwest Plateau Institute of Biology,Chinese Academy of Sciences,Xining 810008,China
    2.College of Life Sciences,Chinese Academy of Sciences University,Beijing 100049,China
    3.Key Laboratory of Plateau Biological Adaptation and Evolution,Chinese Academy of Sciences,Xining 810008,China
    4.Huzhu Tu Nationality Autonomous County Seed Station,Haidong 810700,China
    5.Haidong City Ledu Bureau of Agriculture and Rural Affirs,Haidong 810700,China
  • Received:2022-03-31 Revised:2022-06-16 Online:2023-04-20 Published:2023-01-29
  • Contact: Zhi-guo CHEN

Abstract:

The objective of this research was to identify silage maize varieties adapted to the Plateau climate in Qinghai from among 39 maize varieties cultivated in different ecological regions in China. We planted these varieties in experimental field plots. Principal component analysis and grey correlation analysis were used to provide a multivariate ranking based on agronomic traits, yields and nutritional analysis of the 39 maize varieties. The 39 varieties were sourced from 10 ecological regions recognized in the national maize variety system. It was found that the agronomic characters, biological yields and nutritional ingredients of eight varieties, including Jindan No.73, Jingjiu silage 16 and Keda 101 of the middle and late mature spring maize type region in North East China; Yu silage 23 of the middle-mature spring maize type region in North East China, Qinyu 58 and Qingqing 300 of the tropical and subtropical maize type region, Tunyu 168 of the northwest spring maize type region, and Zhongyu 335 of the southwest spring maize type region, ranked in the top 10 based on the two analysis methods, indicating that the overall performance of these varieties was better than the others. Hence these 8 varieties can be recommended as suitable for planting in Qinghai.

Key words: silage maize, principal component analysis, grey correlation analysis, Qinghai plateau