外源激素对露珠杜鹃花期调控的影响

Effect of External Hormone on the Florescence Regulation of Rhododendron irroratum in Bai-li Du-juan Tourist Attractions

研究了外源激素对贵州百里杜鹃花区露珠杜鹃(Rhododendronirroratum Franch.)始花期、盛花期、末花期和开花数的调控效果。结果表明:高浓度赤霉素和乙烯利均能提前始花期,但前者效果较好;与只喷洒1次相比,连续喷洒5次赤霉素可进一步提前始花期,同时延长盛花期,而乙烯利却没有明显效果;丁酰肼与赤霉素和乙烯利的组合延迟始花期和末花期,而2,4-D与其组合则提前始花期和末花期;赤霉素能显著增加开花数,乙烯利无影响,2,4-D和丁酰肼则减少开花数。

Start bloom, blooming, end bloom and number of flowering were studied in Rhododendron irroraturn Franch. By spraying different external hormone in Baili Dujuan tourist attractions in this paper. The result showed that gibberellin-A3 and ethephon sprayed higher concentration could flower ahead of time in start bloom, and the former was better than latter. The gibberellin-Aa sprayed for 5 times hastened the time of flowering in start bloom and delayed the blooming, compared for 1 time. However, it was not prominently effect when the plant were sprayed the ethepbon. The mixed hormone of Daminozide both gibberellin-A3 and ethephon delayed the start bloom and end bloom, and advanced the start bloom and end bloom when 2,4-D were add in the solution of gibberellin-A3 and ethephon respectively. The number of flowing increased by spraying gibberellin-A3 and decreased by spraying 2,4-D and Daminozide, and it was not effect by ethephon.