水氮耦合对隔沟灌溉温室番茄品质的影响

试验设置固定隔沟灌和交替隔沟灌2种灌溉方式,每种灌溉方式设置2个灌水水平和2个施氮水平,共8个处理,展开不同水氮组合对温室番茄品质影响的研究。结果表明,固定隔沟灌、降低灌水量可显著提高番茄的可溶性固形物、有机酸、可溶性糖和维生素C质量分数;增加施氮量能显著提高番茄的有机酸质量分数。交替隔沟灌,增加施氮量可显著提高番茄的可溶性固形物质量分数;增加灌水量可显著提高番茄的有机酸和维生素C质量分数,降低施氮量或增加灌水量均能显著降低番茄硝酸盐质量分数。交替隔沟灌更有利于提高番茄的可溶性糖质量分数,降低硝酸盐质量分数,提高果实品质。

Coupling Effect of Water and Nitrogen on the Quality of Greenhouse Tomato under Furrow Irrigation

The study was to explore the coupling effect of water and nitrogen on the quality of greenhouse tomato, eight treatments of three factors including irrigation methods, irrigation volume, and nitrogen application were set. The results showed that, under the fixed furrow irrigation, reducing the irrigation water could significantly improve the soluble solids, organic acid, soluble sugar mass fraction and vitamin C mass fraction of tomato; increasing nitrogen application could significantly improve the organic acid mass fraction of tomato. Under the alternate furrow irrigation, increasing irrigation water could significantly increase the organic acid mass fraction and vitamin C mass fraction of tomato. Reducing nitrogen or increasing irrigation water could significantly reduce the nitrate mass fraction of tomato. The alternate furrow irrigation was more advantageous to improve soluble sugar mass fraction, and to reduce nitrate mass fraction was more advantageous, and then improved fruit quality.