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Propagation of Jackfruit by Modified Cleft Grafting as Influenced by Time of Operation

M. J. M. Khatun
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. S. Islam
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

T. Haque
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

N. Khan
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted to study the effect of time (season) of grafting on the performance of modified cleft grafting of Jackfruit at the BAU Germplasm Centre (GPC) of Fruit Tree Improvement Project (FTIP) of the Department of Horticulture, Bangladesh Agricultural University, Mymensingh. The experiment consisting ten levels of grafting times, viz., 30^th March, 15^th April, 30^th April, 15^th May, 30^th May, 15^th June, 30^th June, 15^th July, 30^th July, 15^th August, was laid out in RCBD with three replications. The results revealed that grafting done on 14th August showed the highest success (39%) and took the lowest time to first flush and first leaf opening (4.66 and 5.00 days, respectively) whereas the success rates were very low at the months of March, April and May. Likewise the highest vegetative growth of the grafted plants in terms of height, diameter, number of leaves, length and breadth of the leaves was found with grafting done on 14^th August.

Keywords: Jackfruit, Grafting, Season, Success, Growth

Location: Department of Horticulture, Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Jackfruit

Objectives:

i. To find out the appropriate time of modified cleft grafting and

ii. To get a suitable and easy method of jackfruit propagation.

Methodology:

The experiment on modified cleft grafting of Jackfruit was conducted at the BAU Germplasm Centre (GPC) of Fruit Tree Improvement Project (FTIP) of the Department of Horticulture, Bangladesh Agricultural University, Mymensingh. Scions with deep green leaves were selected from healthy, quality, vigorous and actively growing shoots of 10 years old Accession No. Ah68 from Germplasm Centre of Fruit Tree Improvement Project (FTIP) of Department of Horticulture, BAU. Rootstocks were used from GPC, planted in the previous year. The single factor experiment consisting ten levels of grafting times, viz., 30^th March, 15^th April, 30^th April, 15^th May, 30^th May, 15^th June, 30^th June, 15^th July, 30^th July, 15^th August, was laid out in RCBD with three replications. Each replication was consisted of ten grafts. The prepared grafts were placed under shade and were maintained in good condition by watering, removal of polythene cap and sheet after sprouting, weeding, and off shoot cutting. Sometimes the shades were removed for the exposure of the grafts to the sunlight. The data were collected on the following parameters: success of grafting, time required to first flush, scion height, scion diameter, number of leaves per graft, leaf length and leaf breadth. Number of successful grafts and average time required to first flush were calculated from date of operation. Growths of the grafts (scion height, scion diameter, number of leaves, leaf length and leaf breadth) were recorded at 15 days interval up to 150 days after grafting operation. Data were collected on various parameters as mentioned in the tables and the differences of the mean of treatments were compared by LSD test.

Source of Information: Progress. Agric. 19(2) : 67-74, 2008 ISSN 1017-8139

Article Link (Online Journal): http://www.banglajol.info/index.php/PA/article/download/16930/11886

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

To study the performance of successful grafts the vegetative growth was observed intensively providing 15 days interval up to 150 days after grafting. This findings might be related to the maturity of scion bud, which was the highest in August and less in earlier months. Maximum number of leaves with the grafts done in the month of August might be due to optimum temperature and soil moisture that was effective for maximum cell division. Another cause might be early bud breaking. The largest leaves were obtained in grafting operation at 14^th August probably due to early sprouting and availed maximum duration up to 150 DAG. Length of leaf was found to be the highest (10.76 cm) in the grafts done at 14^th August which was closely followed by 29^th July (10.24 cm) and 13^th June (10.07 cm). Breadth of leaves was also significantly varied due to the influence of time of operation. The highest breadth of leaf (5.14cm) was recorded in case of 14^th August grafting followed by 29^th July (5.03 cm) grafting at 150 DAG. The lowest breadth of leaf (1.46cm) was recorded in 29^th April grafting at 150 DAG. Considering the parameters it was observed from this research work that mid August is the optimum time for modified cleft grafting in Jackfruit as at this time the success and subsequent growth of grafts is relatively better. The research may be done further for better confirmation and with new dimension.

Knowledge Management: Journal