| Effects of different irrigation quantity and frequency on tomato quality and sugar accumulation |
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| DOI：10.7606/j.issn.1000-7601.2019.06.13 |
| Key Words: tomato irrigation quantity and frequency quality and yield sugar component activity of sugar metabolizing enzymes |
| Author Name | Affiliation | | ZHOU Haixia | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | LAN Zhiqian | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | ZHANG Kaige | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | ZHENG Wende | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | MA Jiawei | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | LIN Wei | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | ZHANG Xueyan | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China |
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| Abstract: |
| A two\|factor randomized block design with four irrigation levels (L1,L2,L3,L4) and two frequencies (P1,P2) in this study was used. By studying the nutritional quality such as sugar components, carbohydrate metabolizing enzymes, and yield of tomato in winter, spring, summer, and autumn, we discussed the effects of irrigation amount and frequency on the formation mechanism of tomato quality and the optimum irrigation amount and frequency for better quality and yield. The results showed that appropriate reduction in irrigation volume can increase the nutritional contents including sugar content, SS and SPS activities, and WUE, but inhibited the activity of AI and NI and reduced the yield, while the irrigation frequency had no significant effect on all indexes. The organic acids, soluble sugar content, sugar and acid ratio, SS and SPS activities, fructose and glucose contents of winter and spring crop reached the maximum in L2 treatment, while the yield was the largest in L4, of which Vc, glucose, and SS activity had a greater impact on its quality and yield formation. Nutritional quality indicators of summer and autumn stubble tomato, sugar content (except starch), SS activity with L1 treatment were significantly higher than L3 and L4. The yield was still the largest with L4. The fructose content in L1 was significantly higher than that with L3 and L4, 1.02 and 1.25 times, respectively. Among them, Vc, sucrose, and NI activity had significant effects on its quality and yield formation. According to analyses of the main components of the overall quality and yield derived, winter and spring stubble in greenhouse, greenhouse tomato seedling stage, flowering set fruit stage, and full bearing period to seedlings pulling were irrigated at 150, 200, 400 ml·plant-1·d-1 and 300, 600, 900 ml·plant-1·d-1, and 1 or 2 times a day obtained the best overall quality and yield. |
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