光氮互作对番茄生长发育的影响

通过盆栽试验研究了不同光照强度、氮肥用量对番茄生长发育的影响。结果表明，光氮互作对番茄生长发育影响显 著，适量施用氮肥对番茄叶面积增加有促进作用，所有处理均在240 kg·hm^-2施氮量时达到最高。遮光处理使番茄株高、叶面 积增加，茎粗降低。坐果率随施氮量的增加而增加，增加到一定水平后下降。在同一施氮水平下，70 %自然光对番茄生长有 促进作用，50 %、30 %自然光对其有抑制作用。综合番茄生长发育的测定结果，100 %、70 %自然光处理以240 kg·hm^-2施氮 量较为适宜，50 %、30 %自然光处理以120 kg·hm^-2施氮量较为适宜。

Effects of Light Intensity and Nitrogen Supply Interaction on Growth and Development of Tomato

The effects of light intensity and nitrogen supply interaction on growth and yield of tomato （Lycopersicon esculentum Mill.）were studied with potted tomato.The results indicated that interaction of light intensity and nitrogen had significant influence on growth and development of tomato.Tomato leaf area was promoted by adequate nitrogen supply,240 kg·hm^-2 nitrogen supply was the highest in all treatments.Shading treatments could promote tomato plant height and leaf area,decrease stem diameter.The fruit setting rate was increased at first,then decreased with increasing nitrogen application.With same nitrogen level,70 % natural light intensity had promotive effects,50 % and 30 % natural light intensity had the opposite effects.Taken the growth and development of tomato into account,240 kg·hm^-2 was the appropriate nitrogen supply in 100 % and 70 % natural light intensity,120 kg·hm^-2 in 50 % and 30 % natural light intensity.