选取具有代表性的10个自选玉米自交系为试验材料,在3种不同密度下,对自选系的株高、穗长等8个农艺性状的综合表现进行分析。结果证明:一是多半自选系随着密度的增大,株高、穗位渐渐升高,穗长、百粒重、单穗粒重逐渐变小,秃尖长逐渐增大,而生育期、穗行数变化不大;二是10个自选玉米自交系单株产量的差值变化较大,耐密系数N值亦有差异。 A total of 10 representative maize inbred lines were selected as test materials to analyze the comprehensive performance of 8 agronomic traits such as plant height and spike length of three selected lines at three different densities. The results showed that: First, most of the selected lines with the density increased, plant height, ear position gradually increased, spike length, 100 grain weight, grain weight per head gradually become smaller, bald length increased gradually, and growth period, The number of ear rows did not change much. Second, the differences of single plant yield of 10 self-selected maize varieties varied greatly, and the N-value of tolerance index also differed.