Screening Of High Yield And High Efficiency Maize Cultivars In Guanzhong Irrigation Area

Maize is one of the main crops in China.At present,China’s crop production mode is relatively developed agricultural countries generally extensive,low planting efficiency,waste of resources and environmental pollution.In order to ensure national food security,the Chinese people’s rice must be firmly in their own hands.Screening high-yield and high-efficiency cultivars in different environments is an effective way to achieve grain storage in technology.In this study,the regional experiment of fertilizer saving in Guanzhong irrigation area in recent three years was taken as the research object,and the high yield,stable yield and nitrogen efficiency characteristics of 22 maize cultivars in three years were comprehensively analyzed and evaluated by rank analysis,AMMI model and GGE model.The main research results are as follows:1.Through the comprehensive analysis of rank analysis,AMMI model and GGE model,Shaandan609,Boao408,Shaandan619,Jinyu163 and Shaandan660 were selected as high nitrogen and high efficiency cultivars;2.Through a variety of analysis methods,compared with other traits,high-yield and high-efficiency cultivars have higher ear leaf area at filling stage,SPAD value at silking stage and SPAD value at harvest.These more prominent traits laid the foundation for high yield and high efficiency of material accumulation in the later stage;3.Maize yield evaluation is mainly affected by cultivars effect,cultivars-environ-ment interaction effect,and different analysis methods have different emphases.Rank analysis focuses on cultivars effect;AMMI model focused on cultivars-environment interaction effect;The GGE model comprehensively considers the interaction effects of cultivars,cultivars and environment,and selects the GGE model for analysis,so as to avoid the subjective arbitrariness of the application of multi-environment analysis model.In this study,the yield characteristics were basically the same,but the yield stability was different.Therefore,using a variety of analytical methods to comprehensively analyze the results is more accurate and scientific;4.High yield should not be the only measure in green variety screening.In order to achieve the sustainable development of agriculture,more attention should be paid to the cultivars with good comprehensiveness,such as balanced,stable,high-yield,good adaptability,high quality and efficiency,and green cultivation measures,so as to achieve the green and sustainable development of agriculture and ensure food security in China.