摘要: |
测定分析营养液加硒后水培生菜产品器官茎叶品质指标的变化,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 |
关键词: 硒素 水培 生菜 品质 营养液 |
DOI: |
|
基金项目: |
|
Effect of Selenium on Quality of Hydroponics Lettuce |
|
|
Abstract: |
As the result of selenium supplement on nutrient fluid, quality indexes of stems and leaves of hydroponics lettuce changed compared with the check without selenium. Se-lenium at 0. 4 mg .L-1 enhanced the absorption of N and P, depressed the absorption of K,Na, Ca, Mg, Fe, Mn, Cu, Zn, improved the content of total sugar, reducing sugar,chlorophyll and vitamin C in stems and leaves, decreased the content of nitrite, coarse fiber and three free amino acid such as Cys, Met and Tyr. The content of free amino acid decreased 5. 41 % and 8. 28% respectively in butter lettuce and red leaf lettuce, while in-creased 3. 04% in glass lettuce, it indicated that effect of selenium on protein metabolism differed among different varieties. |
Key words: selenium,hydroponics,lettuce,quality |