Cultivation of Kohlrabi (Brassica oleracea var. gongylodes) with Raj Koroi Tree as Agroforestry

Abstract

An agroforestry experiment was conducted at Ramlakkhan village which is situated at Bauphal upazilla, Patuakhali district, during the period from November 2017 to March 2018. The main objective of the experiment was to evaluate the performance of kohlrabi (Brassica oleracea var. gongylodes) in association with raj koroi (Albizia richerdiana) tree (2.5 year’s) at different distances from tree base. The experiment consisted of four different treatments viz. T0 (open field referred as control), T1 (25 cm distance from the tree base), T2 (50 cm distance from the tree base) and T3 (75 cm distance from the tree base). The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Data were collected on morphological and yield contributing characteristics of kohlrabi and analyzed for evaluation of the treatment effects. In this study, different growth parameters viz. length of leaf, breadth of leaves, total number of leaves per plant, plant height, length of root, weight of root, individual weight of fruit and fresh and dry weight of yield of kohlrabi was observed in association with raj koroi tree. Results showed that growth and yield of kohlrabi was better in the open field condition compared to other treatments of the study. The highest (540.8g) and lowest (380.6g) fresh weight of modified stem of kohlrabi were recorded in T0 (open field referred as control) and T1 (25 cm from tree base), respectively. In combination with tree species, though maximum parameters of growth and yield of kohlrabi gradually decreased with decreasing distances towards the tree base, kohlrabi can be cultivated in association with raj koroi tree as agroforestry.