Evaluation of Nitrogen, Potassium and Magnezium fertilaizer amounts on yield and quality of Banana in greenhous

This experiment were conducted to evaluate the effect of different amounts of nitrogen, potassium and magnesium and to determine the best amount of fertilizer to increase the yield of greenhouse banana. This investigation was design as split plot factorial with three levels of main and level 4 factorial combinations of 3 levels of potassium and magnesium as a sub-level from 2004 to 2006 years. Amounts of fertilizers were contained: Nitrogen (0, 100 and 200 g) from source of ammonium sulfate fertilizer, Potassium, (0, 100, 200 and 300 g) K2O, from sources potassium sulfate as basic and KCl as roads and magnesium (0, 50 and 100 g) for each plant. This experiment was carried out in three replications in a greenhouse at Sari city. These results showed that nitrogen and potassium effects on banana yield were significant in 5% level but for magnesium did not show in this level. Also results showed that the effect of different amounts of nitrogen from ammonium sulfate source on fruit yield and fruit length and number of rows of fruit per cluster was significant. Highest fruit yield, fruit length and number of rows per ear were input from 200 g nitrogen and quantity of increasing of fruit yield was about 46 kg to control. Obtained results indicated that effect of potassium fertilizers were significant for fruit yield, fruit length and number of rows per cluster. Effect of different levels of magnesium sulfate fertilizer were not significantly on yield although the effect of magnesium sulfate fertilizer on fruit length and number of rows per cluster to control was difference significant in 5% level. These results showed that the interaction of between potassium fertilizer and magnesium sulfate in the five percent level was significant and the highest yield of fruit was obtained from the highest levels of potassium and magnesium consumption. Also interaction of different fertilizers showed that performance and characteristics of physiological banana were significant at the level of five percent and the highest yield was obtained from consumed 200 g N from the source of sulfate ammonium 300 g K2O and 100 g of MgSO4. Finally, the best banana plant fertilizer recommendations for each year during were 650 g ammonium sulfate, 150 g, potassium sulfate, 450 g potassium chloride as split and 100 g magnesium sulfate. The results showed that the effect of balanced nutrition been very positive to improve the qualitative and quantitative characteristics of banana and showed a significant difference to other treatments.