| Effects of drip irrigation uniformity coefficient on tomato growth in solar greenhouse |
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| DOI：10.7606/j.issn.1000-7601.2020.02.05 |
| Key Words: drip irrigation irrigation uniformity coefficient irrigationt amount greenhouse tomato growth quality |
| Author Name | Affiliation | | LIANG Bohui | Ningxia Institute of Water Resources Research, Yinchuan, Ningxia 750021, China
College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | NIU Wenquan | College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China | | GUO Lili | College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | YANG Xiaokun | College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Xuekai | College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In order to explore the reasonable uniformity coefficient of drip irrigation on tomato growth in solar greenhouse, the experiment set three different drip irrigation uniformity levels, 65% (C1), 75% (C2), and 85% (C3), and three different irrigation levels, 190 mm (I1), 220 mm (I2), and 250 mm (I3). The results showed that the uniformity coefficient of drip irrigation had no significant effects on plant stem height and plant height growth (P>0.05), and had significant effects on stem growth (P<0.01) while the irrigation amount and the interaction between the irrigation uniformity coefficient and the irrigation amount had no significant effects on the growth of stem height (P>0.05). The irrigation amount had significant effects (P<0.01) on tomato quality indexes such as soluble sugar, lycopene, vitamin C, and soluble solids (except organic acid), but, the irrigation uniformity coefficient and the interaction between two factors had no significant effects (P>0.05) on tomato quality index. Irrigation amount, uniformity coefficient of irrigation, and the interaction between the two factors had no significant effects on fruit shape index (P>0.05). Therefore, when the uniformity coefficient of irrigation was 75% and the irrigation amount was 190 mm, the quality of tomato was the best. Under the whole growth period, the uniformity coefficient of drip irrigation was 65%~85%, and the uniformity coefficient of soil moisture content was 85%~95%, which met the needs of tomato growth. Therefore, it is possible to consider reducing the current standard of drip irrigation uniformity coefficient of greenhouse crops in the northwest region. |
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