稀土对银杏苗木叶内含物及其产量的效应

Effects of Rare Earth Elements on Some Leaf Inclusion and Leaf Yield in Seedlings of Ginkgo biloba

采用不同浓度稀土液喷施叶面 ,研究稀土对叶用银杏园苗木叶蛋白质、可溶性糖、叶绿素、总黄酮含量及叶片产量的影响。结果表明 :50mg/L稀土液处理对银杏苗木叶蛋白质、可溶性糖和总黄酮含量有显著促进效果 ,与对照相比 ,分别提高了 33.0 %、2 9.0 %和 48.6% ;1 0 0mg/L浓度处理对叶绿素含量促进效果最佳 ,达 1 6.8% ;1 0 0mg/L浓度处理使叶片产量提高了 1 1 .64% ,而 40 0mg/L浓度处理则起抑制效果 ,蛋白质、叶绿素和总黄酮含量分别减少2 6.7%、1 9.3%及 3.4%。

The effects of rare earth elements on some leaf inclusion and leaf yield in seedlings of Ginkgo biloba were studied. The results show that by spraying 50?mg/L La(NO 3) solution on leaves of Ginkgo biloba seedlings, the content of soluble protein、soluble sugar and total flavonoid of the leaves was all markedly increased, respectively by 33.0%、29.0% and 48.6% more than the control. Treatment with 100?mg/L La(NO 3) solution was most effective on promoting the content of chlorophyll, the content of chlorophyll was increased by 16.8% more than the control, and the leaf yield was increased by 11.64% more than the control. 400?mg/L La(NO 3) treatment has a negative effect, the content of soluble protein、chlorophyll and total flavonoid of the leaves was respectively decreased by 26.7%、19.3% and 3.4% less than the control.