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Effect of Scion Wood Maturity and Time on the Grafting Success, Survivability and Growth of BAU-3 Lemon

M. Banik
Department of Horticulture, Bangladesh Agricultural University, Mymensingh

M.S.H. Choudhury
Department of Horticulture, Bangladesh Agricultural University, Mymensingh

M.A. Rahim
Department of Horticulture, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

The present experiment was conducted at the Germplasm Centre (GPC) of the Fruit Tree Improvement Program (FTIP), Bangladesh Agricultural University, Mymensingh, during the period from March to November, 2013 to investigate the effects of scion wood maturity and time of cleft grafting on the success, survivability and growth of grafts in BAU-3 (semi-seedless) Lemon. The experiment consisted of two factors such as Factor A: three maturities of scion viz., terminal, mid and basal portions of shoot and Factor B: ten different dates of grafting viz., 25 March, each 10 and 25 of April, May, June and July and 10 August, 2013. The study was laid out in factorial experiment following Randomized Complete Block Design (RCBD) with three replications. The grafts were kept under observation in poly tunnel condition. Results revealed that, the lowest time for bud breaking (8.80 days) and first leaf opening (15.05 days) with the highest graft height (44.38 cm), number of leaves (22.47) and branches (3.40), graft success (97.39%) and survivability (95.33%) were obtained by the grafts of mid portion of shoot used as scion when grafted on 25 June. On the other hand, the highest time for bud breaking (14.67 days) and first leaf opening (21.67 days) with the lowest graft height (33.8 cm), number of leaves (12.43) and branches (1.73), graft success (85.19%) and survivability (83.33%) were needed by the grafts of terminal portion of shoot used as scion when grafted on 25 March. Therefore, middle portion of shoot used as scion and 25 June as grafting time are suitable for highest success and growth of BAU-3 lemon.

Keywords: Scion wood maturity, Grafting time, Graft success, Survivability, Lemon

Location: Germplasm Centre (GPC) of the Fruit Tree Improvement Program (FTIP), Bangladesh Agricultural University, Mymensingh

Start Date: 00-03-2013

End Date: 00-11-2013

Program Area: Variety and Species

Commodity: Lemon

Objectives:

1. To supply grafted plants to fulfill the demand and to earn money and to keep the nursery busy round the year with the benefit of tap root system of seed propagated plant.

Methodology:

The present experiment was conducted at the ‘BAU Germplasm Centre’ (GPC) of Fruit Tree Improvement Program (FTIP), Bangladesh Agricultural University, Mymensingh during the period from 25 March, 2013 to 10 November, 2013. High yielding cultivar namely FTIP BAU Lebu-3(semi seedless) was used in this study. The rootstocks used in the experiment were raised in polybag from the lemon seeds of unknown variety. The scion shoots used, were collected from mother plants of lemon (cv. BAU Lebu-3). The two-factor experiment consisting of 30 treatment combinations was laid out in Randomized Complete Block Design (RCBD) with three replications. For each treatment combination grafting operations were performed on twenty rootstocks of each plot of a block. Thus in total 3×10×3×20= 1800 grafts were made. The experiment consisted of two factors, Factor A: three scion wood maturities viz., terminal/apical portion used as scion (M₁), mid portion i.e; just below apical portion used as scion (M₂) and basal portion i.e; just below mid portion used as scion (M₃) and Factor B: ten time of grafting operations viz., 25 March, 2013 (T₁), 10 April, 2013 (T₂), 25April, 2013 (T₃), 10 May, 2013 (T₄), 25 May, 2013 (T₅), 10 June, 2013 (T₆), 25 June, 2013 (T₇), 10 July, 2013 (T₈), 25 July, 2013 (T₉) and 10 August, 2013 (T₁₀). The collected data on the different parameters of study were statistically analyzed to find out the significance of differences between the treatments and treatment combinations. The means of all the treatments were calculated and the analyses of variances (ANOVA) for all the characters were performed by ‘F’ variance test. The significance of differences between treatments means were compared by Least Significant Difference (LSD) test.

Source of Information: J. Agrofor. Environ. 8 (2): 127-130, 2014; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Results revealed that, the lowest time for bud breaking (8.80 days) and first leaf opening (15.05 days) with the highest graft height (44.38 cm), number of leaves (22.47) and branches (3.40), graft success (97.39%) and survivability (95.33%) were obtained by the grafts of mid portion of shoot used as scion when grafted on 25 June. On the other hand, the highest time for bud breaking (14.67 days) and first leaf opening (21.67 days) with the lowest graft height (33.8 cm), number of leaves (12.43) and branches (1.73), graft success (85.19%) and survivability (83.33%) were needed by the grafts of terminal portion of shoot used as scion when grafted on 25 March. Therefore, middle portion of shoot used as scion and 25 June as grafting time are suitable for highest success and growth of BAU-3 lemon.

Knowledge Management: Journal