| Cite this article: | 李丹,万书勤,康跃虎,等.滨海盐碱地微咸水滴灌水盐调控对番茄生长及品质的影响[J].灌溉排水学报,0,():-. |
| LI Dan,WAN Shuqin,KANG Yuehu,et al.滨海盐碱地微咸水滴灌水盐调控对番茄生长及品质的影响[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 2379Times Download 0Times |
|
|
|
| DOI： |
|
| Effects of Water-Salt Regulation on Tomato Growth and Quality under Drip Irrigation with Brackish Water in Coastal Saline-Alkali Soil |
|
LI Dan, WAN Shuqin, KANG Yuehu, LI Xiaobin
|
|
Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographical Sciences and Natural Resources Research,CAS
|
| Abstract: |
| 【Objective】 This study aims to investigate the feasibility and safety of green agricultural production under drip irrigation with brackish water in coastal saline-alkali soil. 【Method】 To research the effect of brackish water irrigation on tomato growth, yield, quality characteristics, and salinity distribution of the soil profile, we used 0.7 dS/m as a control check and conducted four tomato treatments with brackish water of different conductivity (3.2 dS/m, 4.7 dS/m, 6.2 dS/m, 7.8 dS/m). The tomatoes were subjected to saline drip irrigation and ridge cultivation using a water-salt regulation method. 【Result】 The results showed that (1) the salinity of the entire soil did not increase significantly, whereas the salinity of the soil profile was redistributed when tomatoes were irrigated with brackish water of 3.2 to 7.8 dS / m. There was an apparent salt leaching zone in the area 10 cm wide and 0 ~ 60 cm deep from the dripper. The salinity was mainly washed down to a depth of 70 cm and the surface of ridges and ditches (0-20 cm) that were 20-40 cm away from the dripper. (2) With the increase of irrigation water conductivity (ECi), LAI, fresh weight, and dry weight increase and then decreased, the plant height and stem thickness gradually decreased. Moreover, all indicators reduced significantly compared with 0.7 dS/m when the conductivity exceeds 4.7 dS/m. (3) No significant difference in chlorophyll, malondialdehyde (MDA), carotenoid, and proline content in different treatments, while brackish water irrigation significantly reduced the content of soluble sugar in the leaves. (4) With the increase of conductivity, the content of soluble solids, reducing sugar, and organic acid in tomato fruit gradually increased, whereas the sugar-acid ratio and yield were the opposite. Besides, when ECi exceeds 1.4 dS/m, for every 1 ds/m increase of ECi, the yield decreased by approximately 9.7% employing formula fitting. 【Conclusion】 In summary, the brackish water irrigation with a conductivity of less than 4.7 dS/m can be used to irrigation in coastal saline-alkali soil where freshwater scarce. Although the yield was reduced, the water can be saved above 300 mm than freshwater irrigation and the quality of tomatoes was also improved, and maintaining the salt balance across the soil profile. |
| Key words: brackish water drip irrigation; growth indicator; physiological indicator; fruit quality |
|
|
|
|
|
|
