عنوان مقاله [English]
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 2004 growing season. The experiment design was factorial based on randomized complete block design with 24 treatments and 3 replications. The experimental plots were including 1st treatment i.e. NP (conventional application), the 1st treatment + 50 kg/ha of K2So4, 1st treatment + 100 kg/ha of K2So4, and 1st treatment + 150 kg/ha of K2So4. 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 0.01 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 (1st treatment + 150 kg/ha K2So4) in Miyaneh region condition, but totally Agria had advantages in dry and wet weight and other indexes than Satina.