Application of grey theory on the physiological characteristics of drip irrigation processing tomato in salinized soil
ZHANG Jifeng1,2, WANG Zhenhua1.2*, ZHANG Jinzhu1, HOU Yusheng1, REN Zuoli1
1. College of Water and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832003, China; 2. Key Laboratory of Modern Water-saving Irrigation Corps, Shihezi University, Shihezi, Xinjiang 832003, China
Abstract：To investigate the effects of saline-alkali stress on photosynthetic physiology and water and fertilizer-use efficiency of processing tomato, the grey correlation theory was used to study the relationship between physiological indexes and yield and to determine the favorable range of saline content for processing tomato. The soil used was artificially prepared with four kinds of salt contents: non saline alkali soil(CK),mild saline alkali soil(S1), moderate saline alkali soil(S2), and severe saline alkali soli(S3). The salt mass ratio was 1.5,4.0,7.0 and 10.0 g/kg,respectively. The results showed that compared with CK treatment, S1 treatment had no inhibition on the physiological indexes and fertilizer-water efficiency of processing tomato. To a certain extent, S1 treatment improved the photoelectron transfer efficiency and photosynthetic capacity of processing tomato. Water use efficiency was equal to that of CK, and partial productivity of nitrogen fertilizer increased by 3.85%, and the yield increased by 1.28%. The S2 and S3 treatments were significantly more stable than that of CK. The photosynthetic fluorescence parameters decreased to different extents. Intercellular CO2 concentration and the maximum photoche-mical efficiency of PSⅡ increased significantly during the middle and late growth stages. The S3 treatment inhibition phenomenon was the most significant. Compared with CK, the water and fertilizer utilization efficiency of treatment S3 decreased by 52.27% and 50.00%, and the yield reduction rate of processing tomato was 51.91%. The growth process of S2 and S3 treatments were faster than that of CK and S1 treatment, and the physiological indicators reached the maximum in the whole growth period in advance. The results showed that the yield of processing tomato was highly correlated with net photochemic rate(Pn),transpiration rate(Tr)and non photochemical quenching coefficient(NPQ). Combined with the physiological rules of the above three parameters, it can be concluded that the soil salt mass content suitable for processing tomato was 1.5-4.0 g/kg.
张继峯,王振华*,张金珠,侯裕生,任作利. 灰色理论关于滴灌加工番茄生理特性在盐化土中的应用[J]. 排灌机械工程学报, 2021, 39(7): 733-739.
ZHANG Jifeng,WANG Zhenhua*,ZHANG Jinzhu,HOU Yusheng,REN Zuoli. Application of grey theory on the physiological characteristics of drip irrigation processing tomato in salinized soil. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(7): 733-739.
