| Abstract: In order to study the effects of water-soluble amino acids foliar fertilizer with differentconcentrations on the growth and quality of lettuce, the experiment designed 6 treatments, which set updifferent diluted times 0 (CK), 100(T1), 500(T2), 1 000(T3), 1 500(T4), and 2 000 (T5) of fertilizer. Theresults showed that water-soluble amino acids could promote the growth of lettuce, which increased yieldand leaf area. The yield of T4 group (diluted 1 500 times) was the highest, fresh weight and dry weightincreased by 19.72% and 92.44% than the control, respectively. Compared with the control group, the watersolubleamino acids fertilizer could increase the soluble solid content of lettuce and T3 group (diluted 1 000times) increased by 17.92% than the control group. Comprehensive each index, the optimum concentrationfor lettuce growth was diluted for 1 500 times. |