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EFFECT OF NITROGEN AND POTASSIUM ON GROWTH, YIELD AND QUALITY OF LOCAL SOBREE BANANA

M.A. Malek, M.S. Rahman and N.C. Sutradhar

Abstract

The experiment comprised of four levels of nitrogen (350, 450, 550 and 650g urea) and four levels of potassium (300, 400, 500 and 600g MoP) per plant to evaluate the effect of N and K on growth, yield and quality of banana. The growth, yield and quality attributes of banana were significantly influenced by the application of N and K fertilizers. Application of N fertilizer (550g urea) and K fertilizer (500g MoP) per plant significantly increased studied all parameters. Among the different levels of N fertilizer, the highest plant height (308.67 cm) was found from the application of 550g urea per plant and the lowest height (275.92 cm) was observed from 350g urea per plant. Application of different levels of K fertilizer, the longest plant height (305.83cm) was found from 500g MoP per plant while the shortest (276.83cm) was noticed from 300g MoP per plant. In combination of N and K fertilizers, the highest (327.67cm) plant height was found from the application of 550g urea with 500g MoP per plant while the lowest (270.67cm) was observed from 350g urea with 300g MoP. Among the different levels of N fertilizer, the highest yields per plant and per hectare (14.43 kg and 26.57 t/ha) were found from the application of 550g urea per plant and the lowest yields (7.40 kg and 13.58 t/ha) were observed from 350g urea. In case of different levels of K fertilizer, the highest yields per plant and per hectare (13.91 kg and 25.58 t/ha) found from the application of 500g MoP per plant and the lowest yields (7.63 kg and 14.04 t/ha) found from 300g MoP. The treatment combination of 550g urea with 500g MoP produced the highest yield per plant and per hectare (17.27 kg and 31.82 t/ha) while the lowest yield (5.50 kg and 10.12 t/ha) was found from the combination of 350g urea with 300g MoP. Among the different levels of N fertilizer, maximum shelf life (13.07 days) was found from the application of 550g urea per plant and minimum shelf life (12.17 days) was observed from 350g urea. Application of different levels of K fertilizer, maximum shelf life (12.97 days) was found from 500g MoP per plant while minimum shelf life (12.23 days) was noticed from 300g Mop per plant. Application of 550g urea with 500g MoP per plant in combination produced the highest shelf life (13.50 day) while the lowest (12.00) was observed from 350g urea with 300g MoP. Considering the above fact, 550g urea with 500g MoP per plant had more responsible for quality higher yield of banana.