Effects of potassium sulfate (KSO4) on quantity and quality of AGRIA and SATINA potato cultivars in miyaneh region, Iran

In order to survey of various amounts of potassium sulfate fertilizer and it’s effect on quantity and quality of potato Agria and Satina cultivars, an experiment was conducted in the educational-researching farm of Islamic Azad University, Miyaneh branch in 004 growing season. The experiment design was factorial based on randomized complete block design with 4 treatments and replications. The experimental plots were including st treatment i.e. NP (conventional application), the st treatment + 50 kg/ha of KSo4, st treatment + 00 kg/ha of KSo4, and st treatment + 50 kg/ha of KSo4. The cultivation, husbandry and harvesting stages were conducted according to recommended standard methods. During the experiment and after harvesting, quantitative and qualitative indexes were recorded and measured. The indexes such as final number of the main and lateral stems (FS), plant height (H), number of tuber (NT), dry weight of tuber (DWT), wet weight of tuber (WWT), dry plant weight (DPW), wet plant weight (WPW), tuber nitrogen (TN) and Tuber protein (TP) were measured. Data were analyzed by Excel, MSTATC and SAS. According to ANOVA table, the main effect of genotype, fertilizer treatment and also interaction between fertilizer * genotype on growth indexes and yield in 0.0 probability were significant, but the Agria and Satina was different in view point of fertilizer responding. In the other word, a certain fertilizer treatment is needed for each cultivar and we can not consider the same fertilizer treatment for all cultivars. The most suitable fertilizer treatment for both cultivars was the 4th treatment (st treatment + 50 kg/ha KSo4) in Miyaneh region condition, but totally Agria had advantages in dry and wet weight and other indexes than Satina.