تأثير التغطيس بال Ga3 و الرش بال Kt-30 في بعض صفات النمو الخضري و حاصل ثلاثة أصناف من البطاطا Solanum Tuberosum L. بالموسم الخريفي

Abstract EN

The study was conducted at the Horticulture Research Station of the College of Agriculture / Tikrit University for the Autumn season 2019 to investigate the effects of dipping with gibberellin and spraying with KT-30 with three levels for each other (0, 5, 10) mg.

L-1 on some characteristics of vegetative growth, yield and productivity of three potato cultivars (Barcelona, Laperla, Montreal).

Split-split plot design was applied within a randomized complete block design (RCBD) with three replications .

Varieties were assigned in the main plots Dipping with gibberellic acid were assigned in the Sub - plots while spraying with KT-30 were assigned in the Sub-Sub plots.

Results showed that dipping with gibberellin had a significant effect on stem number and leaf area, while the treatment without dipping with gibberellin gave a significant increment of plant height.

Spraying with growth regulator KT-30 resulted in a significant increase in plant height, number of stems and leaf area.Barcelona cultivar gave the significantly highest plants, while Montreal showed a significant increment of stems counts, while the variety Laperla gave a significant increase of leaf area.

On the regard of yield, gibberellin acid showed no significant effect.

While zero KT-30 gave significant differences in both plant and total yields Montreal variety, on the other side, gave significant increase in plant and total yield over the other two varieties.

The bifurcation double and triple manifested significant effects on plant height,number of stems and leaf area.

Bifurcation double showed significant differences in plant yield, number of tubers and the total yield, except for the bifurcation between varieties and dipping with gibberellin, that manifested no significant differences on yield, as well as the bifurcation between dipping with gibberellin and spraying with KT-30 which had significant differences on number of tubers.

All yield characteristics were significantly affected by triple interference