Effects of potassium sulfate (K2SO4) on quantity and quality of potato yield AGRIA and SATINA cultivars in miyaneh region

In order to survey of various amounts of potassium sulfate fertilizer and its effects on quantity and quality of potato Agria and Satina cultivars, an experiment was conducted in the educational-researching farm of Islamic Azad University œ Miyaneh branch in 2004 growing season. The experiment design was factorial based on randomized complete block with 24 treatments and 3 replications. The experimental st st plots were including 1treatment i.e. NP (conventional application), the 1treatment + 50 kg/ha of K2So4 and 1st treatment + 100 kg/ha of K2So4, 1st treatment + 150 kg/ha of K2So4. The cultivation, husbandry and harvesting stages were conducted according to recommended standard methods. During this 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 of the main effect of genotype, fertilizer treatment and also interaction between fertilizer * genotype on growth indexes and yield in the 0.01 probability were significant, but the Aria and Satina was different in fertilizer responding and a certain fertilizer treatment for each cultivar is needed and we cant consider the same fertilizer treatment for all of cultivars. th st The most suitable fertilizer treatment for both cultivars was the 4treatment (1treatment + 150 kg/ha K2So4) in Miyaneh region condition, but totally Agria had advantages in dry and wet weight and other indexes than Satina.