氮素供应及修剪方式对设施樱桃番茄产量及氮素营养的影响

以“千禧”樱桃番茄为试材，研究不同氮素供应水平及植株打顶后的修剪方式对樱桃番茄的果实发育、产量及氮素营养的影响。结果表明，与传统修剪方式（Pc）相比，在氮素供应充足条件下，优化修剪方式（Po）可明显提高樱桃番茄的产量和果实单果重。其中在适宜氮素供应水平下，樱桃番茄产量提高49%，平均单果重提高20%；在氮素过量供应条件下，樱桃番茄产量提高27%，平均单果重提高25%。进一步分析表明，优化修剪能显著提高樱桃番茄果实的干物质积累比例，并通过提高植株叶片中的氮含量来促进番茄源活力，说明在适宜的氮素供应水平下，改善打顶后的樱桃番茄的库源关系可以显著提高番茄的产量。

Effects of different nitrogen supply and pruning methods on the fruit yield and nitrogen nutrition of greenhouse cherry tomato

A greenhouse experiment of cherry tomato（Lesculentum var. cerasiforme Alef） was conducted to investigate the effects of different N supply and pruning methods on fruit yield and nitrogen nutrition after decapitating. The results showed that, optimized pruning method (Po) with adequate N supply significantly increased fruit yield and individual fruit weight of cherry tomato compared with conventional pruning method (Pc). However, optimum and excessive N supply increased fruit yield by 49% and 27%, respectively, and increased individual fruit weight by 20% and 25%, respectively. Further analysis indicated that optimized pruning method could promote the proportion of dry matter accumulated in fruit and sink activity through increasing leaf N content. All these results indicated that the optimized pruning method with optimum N application rate could further improve fruit yield through adjusting the relationship of source and sink after decapitating.