光氮及其互作对番茄产量及品质的影响

通过盆栽试验研究了不同光照强度、氮肥用量及其互作对番茄产量及品质的影响。结果表明，光氮及其互作对番茄产量及品质影响显著。随着施氮量的增加，番茄可溶性蛋白和有机酸含量增加，产量和硝酸盐含量增加到一定水平后下降；可溶性糖含量在100 %、70 %自然光条件下以120 kg·hm^-2施氮量（纯氮）最高，而后下降，在50 %、30 %自然光条件下随施氮量增加持续降低；VC含量在30 %自然光处理下随施氮量增加显著降低，在其他光照处理下则是增加到一定水平后又下降；光照强度显著促进了番茄产量及VC、可溶性糖、可溶性蛋白含量的增加，降低了有机酸和硝酸盐含量。综合番茄产量、品质测定结果，100 %、70 %自然光处理以120 kg·hm^-2施氮量较为适宜，50 %、30 %自然光处理以不施氮肥较为适宜。

The Interactive Effects of Light Condition and Nitrogen Supply on Yield and Quality of Tomato (Lycopersicon esculentum Mill.)

The interactive effects of light condition and nitrogen supply on yield and quality of tomato were studied with potted tomato.The results indicated that the effects of light condition，nitrogen supply and their interactions had significant influence on yield and quality.With the increase of nitrogen，the yield and nitrate content increased at first then decreased，and the contents of soluble protein and organic acid increased，soluble sugar content increased slightly then decreased in 100 % and 70 % light condition and decreased continuously in 50 % and 30 % light condition.With the increase of nitrogen，the VC content increased at first，then decreased in all light conditions，except decreased significantly in 30 % light condition.Light intensity significantly promoted tomato yield，the contents of VC，soluble sugar and soluble protein，but decreased the contents of organic acid and nitrate.Taken the yield and quality of tomato into account，120 kg·hm^-2 was the appropriate nitrogen supply in 100 % and 70 % light conditions，0 kg·hm^-2 in 50 % and 30 % light conditions.