| Effects of reducing water and fertilizer rates on yield, quality and nitrogen utilization of tomato and mini-watermelon in solar greenhouse |
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| DOI：10.7606/j.issn.1000-7601.2020.01.10 |
| Key Words: solar greenhouse water and fertilizer saving tomato mini\|watermelon yield quality nitrogen utilization |
| Author Name | Affiliation | | CHENG Yuzhen | College of Natural Resources and Environment, Northwest A＆F University, Yangling, Shaanxi 712100. China
Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | LUO Wei | College of Natural Resources and Environment, Northwest A＆F University, Yangling, Shaanxi 712100. China
Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | CHEN Zhujun | College of Natural Resources and Environment, Northwest A＆F University, Yangling, Shaanxi 712100. China
Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | ZHOU Jianbin | College of Natural Resources and Environment, Northwest A＆F University, Yangling, Shaanxi 712100. China
Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China |
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| Abstract: |
| This study was aimed to investigate the effect of different combinations of irrigation and fertilizer on yield, quality, and nitrogen (N) utilization of crops in drip fertigated solar greenhouse.The experiment included four treatments including no N input+common irrigation (N0+FI), farmers’ N input+common irrigation (FT+FI), optimum N input+common irrigation (OPT+FI), and optimum N input+optimum irrigation (OPT+OI).The nutrient absorption,yield,quality of autumn\|winter tomato and spring mini\|watermelon in different treatments were determined.Compared with the practical methods of using fertilizer and water by farmers in the region, the combination of optimum N and optimum irrigation did not cause reduction of the yield, content of soluble sugar, titratable acids, and Vitamin C (Vc) of tomato, but the treatments decreased the nitrate content in fruit by 66.3%.When the irrigation amount was similar, the yield of mini\|watermelon with 40% reduction in N fertilizer input was 13.1% higher than that of farmers’ N input. The content of soluble sugar, titratable acid, and Vc in fruit of OPT+OI treatment were significantly higher than that of the control.The nitrogen distribution proportion illustrated as fruit >leaf >stem>root. With the growth of tomato, the nitrogen distribution proportion in fruit and stem increased from 62.4 and 5.9% to 67.1 and 6.3%, respectively, while that in root and leaf decreased, OPT+OI treatment promoted the transport of N from vegetative organs to fruit (the nitrogen distribution proportion in fruit of this treatment increased the most). It is concluded that under current cultivation conditions, yields and N uptake of crop could be obtained at optimum N and irrigation,which also have promoted the fruit quality. |
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