EFFECT OF FOLIAR FERTILIZATION ON GROWTH, YIELD AND NUTRIENT CONTENTS OF BINA dhan 8 UNDER DIFFERENT SALINE CONDITIONS

Abstract

An experiment was conducted at the net house of the Department of Soil Science, Sher-eBangla Agricultural University, Dhaka-1207 under pot-culture during the Boro season (December-June) of the year 2013-14 to study the reclamation of salinity by potassium fertilization methods. The experiment was completed using 4 salinity levels (0, 4, 8 and 12 dS m'j and 4 potassium fertilization processes (Ki = Total soil application of MoP fertilizer. K2 = 1/3 rd foliar spray. 2/3 rd soil application of total MoP fertilizer. K3=2J3 rd foliar spray, 1/3 rd soil application of total MoP fertilizer, K4 =Total foliar spray of MoP fertilizer). BINA dhan 8 was used as variety. Data were taken on plant height, number of leaves hill', root length, dry weight of stem and root, number of effective tiller hill 1, number of panicle hill1, number of filled and unfilled grain hill'. weight of filled grain hill1, 1000-grain weight, grain yield hill' and F, K, S. Na content in straw, root and grain of the selected rice eultivar. Salinity adversely affected all the growth and yield parameters of BINA dhan 8. Like most of the other parameters, highest 1000-grain weight, grain yield hill' were recorded in "0" salinity (control) treatment. Use of potassium alleviated the adverse effects of high salinity on rice plant. Most of the growth and yield attributes varied significantly due to the difThrent fertilization processes of potassium. Among them 2/3 rd foliar spray, 1/3 rd soil application of total MoP fertilizer gave better performances. Even while combined with various salinity levels and 2/3 rd foliar spray & 1/3 rd soil application of total MoP fertilizer gave better results compared to others. Na content in straw, root and grain increased with the increase in the salinity level while K content decreased. In this case of foliar spray along with soil application of MoP fertilizer performed better while treated with salinity compared to sole foliar spray or soil applications.