Abstract: Under the condition of root restriction cultivation，taking normal drainage （20-EC1.6
treatment）as the contrast，this paper measured tomato growth indexes,leaf photosynthetic parameters，
fruit commodity characters，related metabolic enzymes and primary metabolites，etc. under the conditions of
minimal drainage（0-EC1.6 treatment） and increasing nutrient solution concentration（0-EC1.6-2.4 treatment）
or adding NaCl（0-EC1.6-2.4Na treatment） and studied the effect of extremely low drainage rate（ELDR）
and nutrient concentration regulating on tomato fruit quality．The results showed that ELDR could significantly
inhibit tomato plant stem thickening，leaf extension and fruit expanding，decreased leaf net photosynthetic
rate（Pn），stomatal conductance（Gs），intercellular CO₂ concentration（Ci），transpiration rate（Tr），
single fruit weight and yield per plant．However，the contents of soluble solid matter，VC，lycopene，
polyphenols，free amino acid and glucose/malic acid，fructose/citric acid in fruit were significantly increased，
while the percentage of non-commercial fruit was decreased．ELDR combined with increasing nutrient solution
concentration could further increase the contents of soluble solid matter, amino acid and its ramification
（5-L-glutamyl-L-alanine），phenolic acid（coumaric aldehyde）and glucose/malic acid；and reduced noncommercial
fruit rate．ELDR could significantly increase the activities of invertin and sucrose synthase，which
were further remarkably increased by increasing nutrient solution concentration．Thus，catalytic decomposition
of sucrose was made to produce glucose and fructose．Comprehensively considering various indexes，0-EC1.6-2.4
was the optimum treatment for improving tomato fruit quality under root restriction cultivation condition．

Key words: tomato, root restriction cultivation, extremely low drainage rate, nutrient solution concentration, fruit quality

摘要： 在限根栽培条件下，以正常排液（20-EC1.6 处理）为对照，对极少排液（0-EC1.6 处理）及其配合提高营养液浓度
（0-EC1.6-2.4 处理）或添加NaCl（0-EC1.6-2.4Na 处理）条件下番茄的生长指标、叶片光合参数、果实商品性状、相关代
谢酶、初生代谢物等进行测定，研究极少排液与营养液浓度调控对番茄果实品质的影响。结果表明：极少排液显著抑制了番
茄植株茎秆增粗、叶片伸展与果实膨大，降低了叶片净光合速率（Pn）、气孔导度（Gs）、胞间CO₂ 浓度（Ci）、蒸腾速率（Tr），
单果质量和单株产量也显著降低，但果实中可溶性固形物、VC、番茄红素、多酚、游离氨基酸含量及葡萄糖/ 苹果酸、果
糖/ 柠檬酸明显提高，非商品果率降低；极少排液配合提高营养液浓度，进一步提高了可溶性固形物、氨基酸及其衍生物（5-L-
谷氨酰-L- 丙氨酸）、酚酸（香豆醛）含量及葡萄糖/ 苹果酸，降低非商品果率。极少排液显著提高转化酶和蔗糖合成酶活性，
配合提高营养液浓度后转化酶与蔗糖合成酶活性进一步显著提高，从而催化分解蔗糖，产生葡萄糖与果糖。综合考虑各项指
标，0-EC1.6-2.4 为限根栽培提高番茄果实品质的最佳处理。

关键词: 番茄, 限根栽培, 极少排液, 营养液浓度, 品质