农大 1 0 8是一个优质、高产、稳产的春播新品种 ,1 997年引入我市以来已成为主栽品种。本试验研究了在不同密度下 ,该品种的产量性状、植株性状、穗部性状的变化。结果发现 ,在试验密度范围内 ,密度变化对农大 1 0 8的生育期、株高、倒伏率影响较小 ,而对果穗性状和产量水平影响较大。密度增加 ,使果穗变短、秃尖增大、穗粒数减少、千粒重降低。密度过小或过大 ,产量都有所下降。 Nongda 108 is a new spring sowing variety with high quality, high yield and stable yield. Since it was introduced to our city in 1997, it has become a major cultivated variety. This experiment studied the variety of yield traits, plant traits, panicle traits under different densities. The results showed that within the experimental density range, density had little effect on the growth, plant height and lodging rate of Nongda 108, but had a great effect on the characters and yield of ear. Increased density, so that shorter ears, bald tip increased, fewer grains per spike, 1000-grain weight decreased. Density is too small or too large, production has declined.