赤霉素对邓恩桉嫁接种子园花蕾生长的影响

The Effects of GA_3 on Buds Growth of Grafting Seed Orchard of Eucalyptus dunnii

以邓恩桉嫁接种子园为研究材料,分别以赤霉素0、500、1000、1500 mg·L-1进行叶面喷施,研究赤霉素处理对花蕾直径生长、花蕾保存率,叶片叶绿素、氨基酸、蛋白质、可溶性糖含量的影响。结果表明:赤霉素处理后花蕾保存率、氨基酸含量、可溶性糖含量显著高于对照,花蕾直径生长量第2次观测值显著大于对照,可溶性蛋白质含量第1、2次观测值显著高于对照;随着时间的延长,叶绿素含量呈先升高后下降趋势,氨基酸、可溶性蛋白质含量分别呈极显著、显著下降趋势,可溶性糖含量呈显著上升趋势。表明赤霉素处理对提高花蕾直径生长量、花蕾保存率、叶绿素、氨基酸、可溶性蛋白质、可溶性糖含量效果明显,其中以赤霉素1000 mg·L-1处理效果最好。

The grafting seed orchard of E. dunnii as the research materials, clear water treatment as CK ,3 concentrations （500,1000, 1500 mg·L-1 ） of GA3 were taken to spray the foliage, the effects of treatment with GA3 on buds diameter growth, chlorophyll, amino acids, soluble protein, soluble sugar content were researched. The results showed that：buds preservation rate, amino acid content and soluble sugar content with GA3 treatments were significantly higher than that of CK, buds diameter growth at the 2nd observation peri- od was significantly greater than that of CK, the soluble protein content at 1,2 observation periods was higher than that of CK;at 3 times observations, chlorophyll content increased and then decline, amino acids content, soluble protein content decreased significant- ly followed the observation time, soluble sugar content with a significant increase followed the observation time. The effects on buds diameter growth, bud preservation rate, chlorophyll, amino acids, soluble protein, soluble sugar content were obvious with the GA3 treatments,the effects of 1000 mg·L-l concentrations were best.