不同浓度赤霉素对冬枣叶片叶面积与比叶重的影响

目的]探索不同浓度赤霉素对冬枣叶片叶面积与比叶重的影响。方法]采用叶面积仪和烘干法,对施用不同浓度赤霉素后的冬枣叶面积与比叶重变化进行了测定。结果]20、40mg/L赤霉素处理对冬枣叶片叶面积增长有促进作用,其中40mg/L处理效果最好,与对照差异极显著。60、80mg/L处理则降低了冬枣叶片叶面积的增长速度和幅度,其中80mg/L赤霉素处理效果最明显。就赤霉素对比叶重的影响而言,影响效果不明显,处理后1～7d,比叶重上升,40mg/L处理高于其他处理和对照,但差异不显著,80mg/L处理则低于对照,但差异也不显著。随后各处理和对照经过不同幅度的下降后,最终各处理与对照数值相近。结论]20、40mg/L的低浓度赤霉素处理显著提高了冬枣叶面积的增长速度,而各浓度赤霉素处理对叶片比叶重的影响不明显。

Effects of GA3 on Leaf Area and Specific Leaf Weight of Leaves of Brumal Jujube

Objective] The research aimed to discuss the effects of Gibberellin(GA3) on leaf area and specific leaf weighit of leaves of Zizyphus jujube cv.Dongzao tress.Method] By using leaf area meter and stoving method,the changes of the leaf area and specific leaf weight of leaves of Zizyphus jujube cv.Dongzao tress treated with different concentration GA3 were studied.Result] GA3 treatment of 40 mg/L and 20 mg/L played an important role in boosting Zizyphus jujube cv.Dongzao tress leaves leaf area growth,and 40 mg/L had very significant differences.On the contrary ,60 mg/L and 80 mg/L treatment reduced the leaf area growth and margins,and 80 mg/L GA3 treatment had the most obvious effect.As far as the effect of GA3 on the specific leaf weight was concerned,the effect was not apparent,and after treated 1~7 days,40 mg/L treatment was higher than contrast,but the difference was not significant.80 mg/L treatment was less than contrast,and the difference was not significant too.After different degree of drop,all treatments were similar to contrast ultimately.Conclusion] GA3 treatment of 40 mg/L and 20 mg/L played an important role in boosting Zizyphus jujube cv.Dongzao tress leaves leaf area growth,but the effects of GA3 on the specific leaf weight were not apparent.