ROOTING FROM DIFFERENT PORTION OF STEM CUTTING OF CROTON (Codiaeum variegatum) USING DIFFERENT PLANT GROWTH REGULATORS

Abstract

Two field experiments were conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from March-2019 to February- (both Kharif and Rabi seasons) to study the rooting from different portion of stem cutting of croton (Codiaeum variegatum) using different plant growth regulators. The experiment consisted of two factors, and followed Randomized Complete Block design (RCBD) with three replications. Factor A. Different portion of stem cuttings denoted as C:C =basal portion of the stem, C 2 =middle portion of the stem, C =top portion of the stem, and factor B: Plant growth regulators denoted as S:S ii 0 3 =control, S =IBA (indole-3-butyric acid) @500 ppm and S 2 1 = NAA (1-naphthaleneacetic acid)@1000 ppm. All of the studied parameters were significantly influenced by different cutting positions. The C portion of stem cuttings had the highest sprouting percentage (98.22 and 95.78%), roots per cutting (8.44 and 4.47), root lengths (5.03 and 2.73 cm), and shoot lengths (11.59 and 8.84 cm) in both Kharif and Rabi seasons, while C portion of stem cutting had the lowest performance of the aforesaid parameters. In the case of different plant growth regulators, S

treatment had the highest sprouting percentages (90.22 and 85.78%), roots per cutting (7.40 and 3.91), root length (4.93 and 2.67 cm), and shoot length (11.44 cm) among the various plant growth regulators applied in both Kharif and Rabi seasons. Therefore, it may be concluded that C

S treatment was better than all other treatments recording the maximum values of various attributes related to the shoot and root growth parameters of croton cuttings during both Kharif and Rabi seasons.