NGHIÊN CỨU HIỆU LỰC MỘT SỐ CHẾ PHẨM ĐIỀU HÒA SINH TRƯỞNG ĐẾN KHẢ NĂNG RA HOA, ĐẬU QUẢ VÀ NĂNG SUẤT XOÀI ẤN ĐỘ LAI

Currently, mango yield in the South Central Coast is very low (26.1 quintals/ha), equivalent to 42.8% compared with a national average yield. With 26 existing mango varieties, most of them have the low percentage of flowering and fruit setting such as Hoa Loc mango, Thanh ca mango… causing economic losses and income for farmers. Some of the growth regulator by-products: Paclobutrazol (PBZ), NAA ...have high efficiency in controlling flowering mango, and fruits as well as improving productivity and saving labor costs. Spraying Paclobutazol (10%) + NAA (0.1%, 0.3%, 0.5% and 0.7%) on the hybrid Indian mango canopy has an effect on increasing the number of buds per tree, promoting the period of flowering faster than the control from 24-27 days. Increasing the percentage of flowering shoots, effective buds and yield of 14.4 to 17.3 tons / ha higher than the control (7.0 tons / ha) from 105.7 to 147.1%.