| Effects of brackish water irrigation on soil water and salt distribution and yield and quality of facility tomatoes |
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| DOI：10.7606/j.issn.1000-7601.2022.03.13 |
| Key Words: brackish water irrigation soil salinity soil moisture facility tomato yield quality |
| Author Name | Affiliation | | MA Jiaying | Institute of Water Conservancy and Construction Engineering, Tarim University, Xinjiang 843300, China
Key Laboratory of Modern Agricultural Engineering, Tarim University, Xinjiang 843300, China | | WANG Xingpeng | Institute of Water Conservancy and Construction Engineering, Tarim University, Xinjiang 843300, China
Key Laboratory of Modern Agricultural Engineering, Tarim University, Xinjiang 843300, China | | WANG Hongbo | Institute of Water Conservancy and Construction Engineering, Tarim University, Xinjiang 843300, China
Key Laboratory of Modern Agricultural Engineering, Tarim University, Xinjiang 843300, China | | WANG Hairui | Institute of Water Conservancy and Construction Engineering, Tarim University, Xinjiang 843300, China
Key Laboratory of Modern Agricultural Engineering, Tarim University, Xinjiang 843300, China | | WANG Xuecheng | Institute of Water Conservancy and Construction Engineering, Tarim University, Xinjiang 843300, China
Key Laboratory of Modern Agricultural Engineering, Tarim University, Xinjiang 843300, China | | LI Zhaoyang | Institute of Water Conservancy and Construction Engineering, Tarim University, Xinjiang 843300, China
Key Laboratory of Modern Agricultural Engineering, Tarim University, Xinjiang 843300, China |
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| Abstract: |
| To investigate the effects of saline water irrigation on soil water and salt distribution and the growth, yield and quality of facility tomato plants, this experiment was conducted with facility tomatoes in the southern border area of Xinjiang. Four irrigation water mineralization levels were set, 2 g·L-1(T1), 4 g·L-1(T2), 6 g·L-1(T3) and 8 g·L-1(T4), and freshwater irrigation was used as the control group (CK) to study the appropriate irrigation water mineralization level of facility tomato under the same irrigation quota conditions. The results showed that the soil water content in different growth stages was basically higher in the 20~60 cm soil layer than the surface and deep soil water content. The soil water content gradually increased with the increase of irrigation salinity. The average soil water content of the soil layer from 0 cm to 80 cm gradually decreased during the growth period and with the depth of the soil decreased significantly. The soil salinity in the initial stage of the growth period mainly accumulated at 0~40 cm. As the growth period progressed, the soil salinity tended to accumulate and move toward the deep layer, mainly in the 0~60 cm soil layer at the end of the growth period. When the salinity was less than 4 g·L-1, the 0~20 cm soil layer was desalted. The average desalination rate of CK treatment was 27. 79%, and desalination rate of T1 treatment was 17. 07%. Irrigation salinity of 2~4 g·L-1 promoted the growth of plant height and stem diameter of tomato plants. Compared with CK, plant height and stem diameter increased by 5.32%~7.08% and 8.23%~9.25%, respectively. Irrigation water salinity of 6~8 g·L-1 played a significant inhibitory effect. A mineralization level of 2 g·L-1 to 4 g·L-1 saline irrigation significantly improved fruit quality while ensuring tomato yield, and the contents of soluble solids, nitrate and Vc increased by 14.50%, 119.38% and 98.54% respectively, compared with CK. No significant effect of 6 g·L-1 irrigation salinity was found on fruit quality, but the yield was 51.61% lower than CK. Yield and quality of tomato decreased significantly under 8 g·L-1 irrigation salinity. Considering the yield and quality indicators, it is recommended to use salt water with salinity of 2~4 g·L-1 to irrigate protected tomatoes in the southern Xinjiang where freshwater resources are scarce and underground saltwater resources are abundant. |
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