几种寡糖类物质对菜薹矿质养分吸收的影响

Effects of Different Oligosaccharides on Mineral Element Absorption of Brassica campestris L.var.utilis Tsen et Lee

采用溶液培养,研究了几种寡糖类物质(海藻酸钠及其寡糖、寡聚半乳糖醛酸和壳寡糖)不同施用浓度(0、10、20、50、100 mg.L-1)对菜薹(心)矿质养分吸收的影响。结果表明:海藻酸钠及其寡糖和寡聚半乳糖醛酸低浓度处理可显著促进菜薹对氮、磷、钙、镁、硼、锰、锌的吸收,低浓度时寡聚半乳糖醛酸对菜薹钾吸收也有一定的促进作用;高浓度时,三者处理效果均不明显,且各浓度处理对菜薹铜吸收也无显著促进作用。壳寡糖低浓度时对菜薹氮、镁、硼、铜、锌的吸收有一定的促进作用;高浓度时引起铜的大量吸收,同时抑制菜薹氮、磷、钾、镁、锰的吸收及钙由地下部向地上部转运。

A hydroponic trial was conducted to investigate effects of several oligosaccharides （ sodium alginate and its oligosaccharides, oligoglacturonide and chitosan oligosaccharide） with the application concentration of 0, 10, 20, 50, 100 mg · L^-1 on mineral element absorption of Brassica campestris L. vat. utilis Tsen et Lee. The results showed that sodium alginate and its oligosaccharides and oligoglacturonide had significantly promotive effects on the absorption of N, P, Ca, Mg, B, Mn, Zn in low concentration. Oligoglacturonide with low concentration also promoted the K absorption to some extents. In high concentration, three oligosaccharides had no significant effects on the mineral element absorption, and did not improved Cu absorption in all concentration used in our experiment. Chitosan oligosaccharide could promote the absorption of N, Mg, B, Cu, Zn in low concentrations, but caused the luxury uptake of Cu and reduced the absorption of N, P, K, Mg, Mn and the transport of Ca from aerial part to the shoot in high concentrations.