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测定分析营养液加硒后水培生菜产品器官望叶品质指标的变化，与未加硒的对照相比，加硒0．4mg·L－1促进了水培生菜植株吸收N和P，但抑制了对K，Na，Ca，Mg，Fe，Mn，Cu，Zn的吸收；提高了茎叶中总糖、还原糖、叶绿素、维生素C的含量；降低了亚硝酸盐和三种游离氨基酸的含量，游离氨基酸总量在奶油生菜和红叶生菜分别降低5．41％和8.28％，玻璃生菜提高了3．04％；蛋白氮水平前两者升高而后者降低，铵态氮又呈相反趋势。说明不同生菜品种的蛋白质代谢受硒的影响不同。
Determination and analysis of nutrient solution plus selenium hydroponic lettuce product organs leaf quality indicators changes compared with the control without selenium, selenium supplementation 0.4 mg · L-1 to promote hydroponic lettuce plants to absorb N and P, but inhibition The absorption of K, Na, Ca, Mg, Fe, Mn, Cu, Zn increased the contents of total sugar, reducing sugar, chlorophyll and vitamin C in stems and leaves, reduced the contents of nitrite and three free amino acids , The total amount of free amino acids decreased by 5.41% and 8.28% in lettuce and lettuce, while the lettuce in glass increased by 3.04%. The former two increased while the latter decreased while the latter increased in the opposite direction. Explain different lettuce varieties of protein metabolism by the impact of selenium.