施肥水平和种植密度对甜玉米叶片叶绿素含量•果穗性状•产量的影响

[Objective] The research aimed to explore high production cultivation optimum composition of local sweet maize. [Method] The effect of fertilizing level and seeding density to Leaf chlomphyll content, ear charateristics and yield of sweet maize were studied, taking the variety of Thentianmei No. 6 as material. And the fertilizing level was main-processing, and the seeding density was vice-precession. Thereinto, treatment A was fertilized with phosphrus nitrate 375 kg/hm^2, eran 300 kg/hm^2 and yousheng 1200 kg/hm^2, treatment B was fertilized with NPK compound fertilizer 750~825 kg/hn^2, treatment C was fertilized with eran 300 kg/hm^2, carbamide 300 kg/hm^2 and plant ash 1500 kg/hm^2. The planting density of treatment a, b and c was 49500, 52500, 57500 stem/hm^2 respectively. [Result] The sweet maize leaf total chlorophyll content was the highest at Ab, the rest was in the order of Ca＞Cb＞Aa＞Bb＞Bc＞Ac＞Ba＞Cc. The value of chlomphyll a/b was in the order of Ab＞Cb＞Ca＞Bb＞Cc＞Ba＞Bc＞Ae＞Aa. The cob character were the best at Ab, the next was Cb. The sweet maize yield from high to low was in order: Cb＞Ab＞Cc＞Bb＞Ca＞Aa＞Ac＞Bc＞Ba. [Conclusion] Influence of fertilizing level to yield of sweet maize was higher than that of seeding density. The best association was fertilized with eran 300 kg/hm^2, carbamide 300 kg/hm^2 and plant ash 1500 kg/hm^2, and seeded with 52500 stem/hm^2. It was suitable to local conditions.