استجابة صنفين من البطاطا لمستويات مختلفة من السماد البوتاسي في محافظة السليمانية

Abstract EN

A field study was conducted in Spring season 2011 at the Agricultural Research Station (Bibijack) located in Bazian township headed by the General Directorate of the Agricultural Researches in Sulaymaniyah Governorate, to compare two imported cultivars of potatoes; Sante and Provento for the characteristics of growth, yield and their quality, as well as the response of both varieties for potash fertilizer K2SO4 levels (0, 25, 50, 75 or 100 kg K2O/donum).

The experiment was laid down in a factorial randomized complete block design with three replications.

The results showed the superiority of Provento variety over Sante variety in the characteristics of plant height, yield per plant, marketable yield and total yield.

However, Sante was superior over Provento in dry matter and tuber starch percentages.

Potash fertilizer level of 50 kg K2O/donum was significantly superior than control in potato yield and quality characteristics, while it was not different significantly from 75 kg K2O/donum in the characteristics of number of tubers per plant, dray matter percentage and tuber starch percentage.

However, vegetative growth characteristics were not affected significantly by potash fertilizer treatments.

The results also showed that Provento variety fertilized with 50 kg K2O/donum gave maximum values in most of studied parameters.