Document Type : Articles
Author
Horticulture and Landscaping Department, College of Agriculture, Tikrit University, Salah Al-Din, Iraq.
Abstract
This experiment was conducted to study the response of tubers of different potato cultivars to treatment with growth regulators gibberellic acid before planting and spraying with growth regulator CPPU on vegetative growth using three levels for each (0, 5, 10) mg L-1 and its effect on vegetative and yield traits ,the experiment was carried out using a split-split plot design within the randomized complete plot design (R.C.B.D.) with three replications, the cultivars put in main plot, GA3 in sub plot and spraying with CPPU in sub-sub plot as more important. The results showed that Laperla cultivar gave significant increase in two characteristics Leaves number , sprouting percentage , reached to (81.94 leaf plant-1 and 2.60%), respectively, while Barcelona cultivar was superior in protein percentage in tubers, which gave 5.32%. As for the CPPU spraying 5 mg L-1, was superior in protein percentage in tubers, which gave 4.92%, while the concentration 10 mg L-1 was superior in leaves number, which reached 75.14 leaf plant-1. As for the effect of treatment with gibberellic acid, it was clear in two characteristics, leaves number and protein percentage gave (72.58 leaf plant-1 and 4.21%) at 5 mg L-1. As for the binary and triple interactions, they caused significant differences for all traits, except unmarketable tubers number didn’t have any significant differences.
Keywords
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