Effect of Salt Stress on Nutrient Absorption and Growth of Tomato Substrate Cultivation
The effects of salt stress on nutrient absorption and growth of tomato substrate cultivation is explored in order to provide a reference for nutrient solution management in tomato substrate cultivation.Using"Del 5"toma-to as the test material,four different NaCl concentrations were set in the nutrient solution:0 mmol/L(CK),30 mmol/L(low concentration),60 mmol/L(medium concentration),and 120 mmol/L(high concentration).The effects of different NaCl concentrations on the content of mineral elements such as nitrogen,phosphorus,potassi-um,calcium,magnesium,and sodium in tomato leaves and Biomass and yield were compared.The results showed that:① The K content in tomato leaves significantly decreased and the Na content significantly increased under NaCl stress,while the Mg content in the lower leaves of tomatoes under stress of medium to high concentrations significantly decreased.Under experimental conditions,NaCl stress has no significant effect on the N,P,and Ca content of tomato leaves;② Low to medium concentrations of NaCl stress have little effect on tomato growth,while high concentrations of NaCl stress inhibit tomato growth,resulting in a significant decrease in biomass and yield.In summary,nutrient solutions containing medium to low concentrations of NaCl(60 mmol/L)have a rela-tively small impact on tomato growth and yield,and can be used for tomato substrate cultivation;The ratio of K,Ca,and Mg in the formula should be appropriately increased to prevent K and Mg deficiency in tomato leaves and alleviate salt stress.
NETL
NSTL
万方数据
