玉米不同种植密度对主要农艺性状和产量的影响

选取具有代表性的6个玉米品种为试验材料,采用裂区试验设计,研究种植密度对主要农艺性状和产量的影响。结果表明,随密度不断提高,行数、行粒数、穗长、穗粗、子粒长、百粒重和茎粗逐渐减小;秃尖长、株高和穗位高逐渐增加;出籽率和产量先增加后减小;容重先减小后增加。因此,选择适宜品种并结合品种自身特性,合理提高种植密度才能促进玉米产量的提高。

Effects on Agronomic Characteristics and Yield of Maize Planting Density

Six hybrids that utilized widely on maize production in China were chose as the materials in the study. Changing trend of hybrids agronomic characteristics and yield with planting density were made by split plot design. The results indicated that rows per ear, kernels per row, ear length, ear diameter, kernel length, 100-kernel weight and stem diameter reduced gradually; barren tip, plant height and ear height increased gradually; shelling percentage and yield increased first and then decreased; while volume weight showed decreasing first and then increasing. It could draw the conclusion that a reasonable increase in planting density could promote the yield of maize production with choosing suitable varieties.