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Effects of water-salt coordinated regulation technique on ion distribution and antioxidant enzyme activities in tomato

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International Journal of Agricultural and Biological Engineering 2022年第6期15卷 165-174页

作者： Weihua Wang Yidan Gong Xuguang Xing Fengyue Zhao Xue Zhang Faculty of Modern Agricultural Engineering Kunming University of Science and TechnologyKunming 650500China Key Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education Northwest A&F UniversityYangling 712100ShaanxiChina

In order to explore the effects of brackish water combined with regulated deficit irrigation of different growth periods,different levels of water,and salt synergistic stress on the characteristics of ion absorption,distribution,transport,and antioxidant enzyme activity of tomatoes,a greenhouse pot experiment was *** influencing factors were set as:irrigation water salinity(local shallow groundwater S01.1 g/L,S12.0 g/L,S24.0 g/L),different water deficit levels(W170%-80%field capacity(FC),W260%-70%FC,W350%-60%FC),and three growth stages(T1 seedling stage,T2 blossoming and bearing fruits stage,T3 mature picking stage).Monitoring and analyzing the dynamic changes of K^(+)and Na^(+)content in tomato root stems and leaves under water-salt stress and antioxidant enzyme activities of leaves at the seedling *** results showed the coordinated regulation of water and salt can significantly change the ion absorption of roots and the transfer between stems and leaves at different growth *** roots and leaves of tomatoes mainly accumulated K^(+),and the stems mainly accumulate Na^(+).The increase of irrigation salinity can reduce the ratio of K^(+)/Na^(+)ratio in *** the coordinated regulation of water and salt,K^(+)became the main osmotic adjustment ion of the leaves *** activities of catalase,superoxide dismutase,and peroxidase in tomato leaves increased with the increase of water-salt *** results have great significance to the response of crops and to meet the requirements for water quality and quantity of brackish water under water-salt stress at different growth stages of tomatoes.

关键词： brackish water irrigation water and salinity stress ion contents antioxidant enzyme activity

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