The Effects of Different Concentration Nutrient Solution on the Yield and Quality of Lettuce
The effects of different concentration nutrient solution on the growth characteristics,yield and quality of lettuce(Lactuca sativa L. Lvju)were studied for providing appropriate nutrient concentrations for the planting of lettuce under plant factory conditions.In this experiment, different concentration nutrient solution of EC 1.0,1.5,2.0,2.5,3.0 dS/m ( CK,T1 ,T2 ,T3 ,T4 ) were designed and the physiological indicators, yield,and quality of lettuce were measured at 14,21,and 28 d after planting.The results show that when planting 14,21,and 28 d,different concentration nutrient solution had a significant impact on the shoot fresh weight,shoot dry weight,root fresh weight,number of leaves,leaf thickness,plant stretching,stem,and chlorophyll content.The soluble sugar content had a little difference between 21 and 28 days of transplan-ting.Based on the above measurement indicators,when planting 28 d,the concentration of nutrient solution is better in the growth status of let-tuce at T2 and T3 ,the optimal yield and quality,and it is a relatively suitable nutritional solution irrigation concentration.
Concentration of nutrient solutionHarvesting periodPlant factoryLettuce