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| DOI：10.13522/j.cnki.ggps.2022189 |
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| Effects of Brackish Water Irrigation with Different Water Quality on Vegetable Yield and Soil Salt Ions |
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JIANG Liyuan, ZHAO Wei, YANG Yuanyuan, CHEN Jinli, YANG Zhaosen, LIU Gang, CHEN Zhijie
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1. Weinan City Agricultural Technology Promotion Center, Weinan 714000, China;
2. Bio-Agriculture Institute of Shaanxi, Xi’an 710043, China
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| Abstract: |
| 【Background】The shortage of water resources has become a restrictive factor in agricultural production, especially in arid and semi-arid areas. The rational utilization of brackish water can alleviate the shortage of water resources. 【Objective】In order to explore the relationship among irrigation water quality, vegetable yield and soil salt ions, 【Method】Tomato and chinese cabbage were irrigated with E1 (3.6 dS/m well water) , E2 (1.96 dS/m well water) and E3 (0.31 dS/m rain water) in 2018 and 2019, the effects of different treatments on vegetable yield, soil electrical conductivity and soil salt ions were studied. 【Result】The results showed that the yield of tomato and chinese cabbage in E3 treatment was the highest, which was 30.9% and 138.8% higher than that of E2 and E1 treatment, and 431.4% and 2 100% higher than that of E2 and E1 treatment, respectively. In the 0~60 cm soil layer, the soil conductivity increased with the increase of irrigation water conductivity. Among them, the soil conductivity of 0~20 cm in E3 treatment was 833 μS/cm. The E2 and E1 treatment increased by 40.9% and 211.2% respectively compared with E3 treatment, and the E1 treatment reached a significant level. The EC Value of soil conductivity showed a very significant positive correlation with soil salt ions Na+, K+, Ca2+, Mg2+, Cl- and SO42- (P<0.01), and a very significant negative correlation with HCO3-, among which Ca2+, Mg2+, Cl-, SO42- had the greatest impact on the EC Value of soil.【Conclusion】Under protected cultivation, the irrigation water with conductivity of 1.96~3.6 dS/m reduces the yield of tomato and chinese cabbage compared with rainwater, and improves the content of soil conductivity and salt ions (Na+, K+, Ca2+, Mg2+, Cl- and SO42-). The irrigation water with conductivity of 3.6 dS/m seriously reduces the yield of vegetables. Therefore, we should pay attention to the quality of irrigation water when planting vegetables. |
| Key words: irrigation water quality; brackish water; yield; soil conductivity; soil salt ions |
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