在陕西关中地区采用带状复合种植和玉米单作两种方式，测定35个玉米品种的株高、茎粗、穗长、穗粗、秃尖长、穗行数、行粒数、百粒重和单穗粒重，通过方差分析、主成分分析和隶属度分析等，评价玉米品种的丰产性和耐密性。结果表明，在带状复合种植模式下，玉米秃尖长增加，单穗粒重下降，茎粗略有降低，其他指标变化不大，且存在明显的品种差异。筛选适合大豆玉米带状复合种植的玉米品种，应重点关注秃尖长、单穗粒重、行粒数、穗行数和穗长。建立耐密性隶属度D与9个测定指标耐密指数(Yi)的线性回归方程，D=0.072 5-0.006 9Y₁+0.198 4Y₂+0.117 0Y₃+0.052 9Y₄+0.143 3Y₅+0.076 1Y₆+0.126 7Y₇+0.054 5Y₈+0.175 9Y₉(R^{2=0.999 9)。通过对带状复合种植模式下的玉米子粒产量、株高以及耐密性综合评判，登海605、陕单650、陕单659、良玉99、郑单326等5个矮秆紧凑耐密的高产玉米品种可作为陕西关中地区与大豆带状复合种植的玉米主推品种。}

Under the condition of soybean-maize strip intercropping in Guanzhong area of Shaanxi Province, 35 maize variety were used as test materials, and their plant height, stem diameter, ear length, ear diameter, bare tip length, row number per ear, seed number per row, 100-grain weight, and seed weight per ear were measured. The yield performance and density tolerance of maize varieties were evaluated by analysis of variance(ANOVA), principal component analysis(PCA) and membership function analysis. The results showed that, under the condition of strip intercropping, maize bare tip length increased, seed weight per ear decreased, stem diameter decreased slightly, while other traits showed no significant differences, and there were obvious varietal differences. To determine maize varieties suitable for the condition of soybean-maize strip intercropping the traits, focus should be placed on traits such as bare tip length, seed weight per ear, seed number per row, row number per ear and ear length. The linear regression function was established between membership function value(D) and density tolerance index of nine measured traits(Yi): D=0.072 5-0.006 9Y₁+0.198 4Y₂+0.117 0Y₃+0.052 9Y₄+0.143 3Y₅+0.076 1Y₆+0.126 7Y₇+0.054 5Y₈+0.175 9Y₉(R²=0.999 9). Based on the comprehensive evaluation of seed yield and plant height of variety grown in intercropping system, as well as density tolerance, four varieties characterized as dwarf and compact phenotype, including Denghai605, Shaandan650, Liangyu 99 and Zhengdan326, density tolerance and high yield, were recommended to be the dominant varieties suitable for strip intercropping mode in Guanzhong area of Shaanxi Province.

S513.047

陕西省重点产业创新链项目(2023-ZDLNY-10);国家农业部科技创新2030-重大项目(2023ZD04035-5-2);2024年陕西省重点研发计划项目;2023年陕西省现代种业发展项目