采用基质–营养液共培养法，研究了不同形态氮素及配施对樱桃番茄果实解剖结构、果实生长以及发育过程中与品质有关的生理指标的影响。结果表明：1）与全硝（100% NO₃^-）处理相比，铵硝配施（75% NO₃^-∶25% NH₄⁺）处理下果实表皮细胞形状更加规则，排列紧密，且角质层覆盖均匀；全铵（100% NH₄⁺）处理的果实表皮细胞形状不规则，排列疏松，其角质层厚度在幼果期和绿熟期显著低于另两个处理，在成熟期显著增加。2）全硝和铵硝配施处理果实单果重变化一致，成熟期铵硝配施处理单果重略高。花后14 d全铵处理显著降低单果重，抑制植株生长，并缩短生育时期。3）氮素形态显著影响果实发育过程中氨基酸的变化：全硝呈持续下降趋势，铵硝配施先下降后升高又持续下降，全铵则呈“W”型。不同形态氮素处理下果实总糖含量均先升后降，于花后21 d达到高峰，此时全铵处理的总糖显著高于另两个处理。全硝及铵硝配施处理下可滴定酸度呈单峰曲线，花后28 d达到最高值；全铵处理在花后7 d含量最高，随后逐渐下降。

and 75% NO₃^-:25% NH₄⁺. While, under the treatment with 100% NH₄⁺, titratable acidity content is the highest at 7 DAF, and then decreases.

Effects of different N forms on fruit anatomy and growth, and contents of metabolites related to fruit quality during the development of cherry tomato（Lycopersicon esculentum Mill.）fruit were studied by using matrix-nutrient solutions co-cultivated with 100% NO₃^-, 100% NH₄⁺ and 75% NO₃^-:25% NH₄⁺. The results are as follows: 1) In comparison to the treatment with 100% NO₃^-, shapes of epidermal cells of the fruits are more regular and have a closer arrangement, and cuticle is distributed evenly under the treatment with 75% NO₃^-:25% NH₄⁺. While, among all the treatments, shapes of the epidermal cells are irregular and have a looser arrangement, and the cuticle is thinner at young fruit and green-ripe stages and is thicker at the mature stage under the treatment with 100% NH₄⁺. 2) During the development of the fruit, individual fruit weight of the treatment with 75% NO₃^-:25% NH₄⁺ shows a similar change tendency as that of the treatment with 100% NO₃^-, and the weight of the treatment with 75% NO₃^-:25% NH₄⁺ is a little higher than that of the treatment with 100% NO₃^- at the maturation stage. While, under the treatment with 100% NH₄⁺, the weight is significantly reduced since 14 days after flowering stage (DAF). 3) Content of amino acids of the fruits decreases gradually after 7 DAF under the treatment with 100% NO₃^-, but it decreases firstly, then increased from 14 to 21 DAF and decreased again in the treatment of 75% NO₃^-:25% NH₄⁺. However, in the 100% NH₄⁺ treatment, it showed a tendency like “W”. Total sugar contents under all the treatments increase at beginning, reach to the highest content at 21 DAF, and then decrease. Total sugar content under the with 100% NH₄⁺ is higher that that of the other treatments. The change of titratable acidity content shows a single peak at 28 DAF in the treatments with 100% NO₃^-