赤霉素对胡萝卜生长及产量的影响

Influence of Gibberellin on Growth and Yield of Carrot

以新胡萝卜1号和新黑田两种品种的胡萝卜为试材,采用100、200、300mg·kg-1的赤霉素在其幼苗期、叶生长期、肉质根生长期3个时期分别喷施和累积喷施,研究不同时期、不同浓度赤霉素对这两种品种胡萝卜产量的影响。结果表明:赤霉素对两种胡萝卜的株高、叶长等植物学性状和产量均有影响,在幼苗期喷施300mg·kg-1和在叶生长期喷施200mg·kg-1赤霉素对新胡萝卜1号植物学性状增长效果最好,在幼苗期喷施100mg·kg-1对产量增长效果最好;在幼苗期喷施100mg·kg-1和肉质根生长期喷施200mg·kg-1对新黑田的植物学性状的增长效果均最好,在幼苗期和叶生长期累积连续喷200mg·kg-1对产量增长效果最好。在3个时期喷施赤霉素对两种胡萝卜都有促进开花抽薹的作用。在幼苗期、叶生长期、肉质根生长期连续累积喷施200mg·kg-1对新胡萝卜1号开花抽薹的促进作用最强,在肉质根喷施300mg·kg-1对新黑田的促进作用最强。

With two varieties of carrot ＇Xinhuluohol＇and ＇Xinheitian＇ as material, we sprayed gibberellin of 100,200,300 mg·kg^-1 on them at young seedling sthge , leaf growth period , storage root growth periods , tested the influence of gibberellin of diferent period and different concentration on yield of these two varieties of carrot. The result indicated that： the gibberellin had influence on yield and the plant characters such as height of plant and length of leaves of these two varieties of carrot. Spreying gibberellin of 300 mg · kg^-1 during young seedling stage and 200 mg · kg^-1 during leaf growth period increased the height of plant and length of leaves of ‘Xinhuluobol＇ best contrast to the controlled, and spreying gibherellin of 100mg · kg^-1 during young seedling stage increased its yield best. While spreying gibberellin of 100 mg · kg^-1 during young seedling stage and 200mg · kg^-1 during storage root growth periods increased the height of plant and length of leaves of ‘Xinheitian＇ best, spreying gibberellin of 200mg · kg^-1 during young seedling stage and leaf growth periods successively increased its yield best. While spreying gibberellin of 200 mg · kg^-1 during these three periods successively promoted bolting and blooming of ‘Xinhuluobol＇ most obvious, spreying gibberellin of 300 mg · kg^-1 duimg storage root growth periods promoted that of ‘Xinheitian＇ most obvious.