| Effects of brackish water drip irrigation on soil water\|salt distribution and grape growth in greenhouse of South Hebei Plain |
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| DOI：10.7606/j.issn.1000-7601.2023.01.16 |
| Key Words: brackish water drip irrigation grape salt threshold new shoot growth net photosynthetic rate sugar acid ratio |
| Author Name | Affiliation | | JIAO Yanping | Hebei Institute of Water Science, Shijiazhuang, Hebei 050051, China
Hebei Technology Innovation Center of Agricultural Water Saving, Shijiazhuang, Hebei 050051, China | | WANG Hanbo | Hebei Institute of Water Science, Shijiazhuang, Hebei 050051, China
Hebei Technology Innovation Center of Agricultural Water Saving, Shijiazhuang, Hebei 050051, China | | CHEN Wenbin | Hebei Institute of Water Science, Shijiazhuang, Hebei 050051, China
Hebei Technology Innovation Center of Agricultural Water Saving, Shijiazhuang, Hebei 050051, China | | ZHAO Mingyan | Hebei Institute of Water Science, Shijiazhuang, Hebei 050051, China
Hebei Technology Innovation Center of Agricultural Water Saving, Shijiazhuang, Hebei 050051, China | | GU Baoqun | Hebei Institute of Water Science, Shijiazhuang, Hebei 050051, China
Hebei Technology Innovation Center of Agricultural Water Saving, Shijiazhuang, Hebei 050051, China | | REN Jiameng | School of Hydraulic Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China |
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| Abstract: |
| In order to determine the suitable salinity of brackish water drip irrigation and provide a theoretical basis for guiding the drip irrigation system of brackish water for different grape varieties, a drip irrigation experiment with brackish water for grape production in greenhouse was carried out in South Hebei Plain.The experiment studied the effects of four different salinity treatments of fresh water (CK), 2 g·L-1 brackish water (2 g·L-1), 3 g·L-1 brackish water (3 g·L-1) and 4 g·L-1 brackish water (4 g·L-1) on soil water and salt distribution, grape growth, photosynthetic characterisitcs and fruit quality. The results showed that： (1)The salt accumulation degree of 2 g·L-1 treatment was less than the salt threshold of normal grape growth; However, the salt accumulation of 3 g·L-1 and 4 g·L-1 treatments exceeded the salt threshold of normal growth. (2)Brackish water drip irrigation slowed down the growth rate of grape new shoots in the early stage, and the higher mineralization degree, the greater the mitigation degree. (3)With the increase of salinity, the net photosynthetic rate and intercellular CO2 concentration of leaves showed a trend of gradual decrease. However,the highest water use efficiency was found at 2 g·L-1. (4)The sugar\|acid ratio coefficient of ‘Flame Seedless’ grapes in 2 g·L-1 treatment was higher than that of other salinity treatments of this variety, which was significantly higher than that in CK treatment by 11.5%, and it had the best quality. The sugar\|acid ratio of ‘Balado Red’ grapes in 3 g·L-1 treatment was significantly lower than the other three treatments with an average reduction of 9.5%, and the quality of the grape was the worst. (5)With the increase of salinity, the grape yield showed a significant decrease trend, and the decrease range of 2 g·L-1 treatment was smaller. Therefore, drip irrigation with brackish water (2 g·L-1) maintained a higher net photosynthetic rate in grape leaves, which significantly reducing ineffective transpiration and improving leaf water use efficiency and sugar\|acid ratio coefficient. This drip irrigation method of ‘Flame Seedless’ and ‘Balado Red’ greenhouse mixed planting improved the quality and keep the yield in this area. |
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