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Effect of Shoot Maturity and Time of Operation on Litchi Air Layering

D. Hossain
Department of Horticulture,Bangladesh Agricultural University, Mymensingh

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

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

R. Yeasmin
Department of Horticulture,Bangladesh Agricultural University, Mymensingh

A. Islam
Department of Horticulture,Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

An investigation to study the effects of shoot maturity and time of operation on the success and survivability of detached litchi air layers through different techniques was carried out at the Fruit Tree Improvement Project, Department of Horticulture, Bangladesh Agricultural University, Mymensingh during the period from June, 2006 to March, 2007. The experiment was carried out in two phases, the first phase included a two-factor experiment consisting of (i) shoot maturity viz., juvenile shoot and old shoot and (ii) time of operations viz., 1st week of June, July and August and in the second phase there was a three-factor experiment consisting above 2 factors and techniques adopted in the detached layers i.e. immediate planting and hardening before planting. The experiment was laid out in the Randomized Complete Block Design (RCBD) with three replications. Shoot maturity, time of operation and techniques adopted on the detached layer showed significant effect on almost all parameters. Juvenile shoot showed the best performance regarding all parameters except number of roots per layer. Juvenile shoot showed maximum percentage of success (77.80) in rooting. The highest percentage of rooting success (80.83), the longest root (8.21 cm) per layer and maximum percentage of survivability (77.72) were achieved from the operation of 1st week of July.

Keywords: Shoot, Maturity, Litchi, Air layering

Location: Germplasm Centre, Fruit Tree Improvement Project, Department of Horticulture, Bangladesh Agricultural University

Start Date: 00-06-2006

End Date: 00-04-2007

Program Area: Food Safety and Security

Commodity: Litchi

Objectives:

1. To observe the effect of mature shoot and time of operation on the success of air layering.

Methodology:

An experiment was conducted at the Germplasm Centre, Fruit Tree Improvement Project, Department of Horticulture, Bangladesh Agricultural University, Mymensingh during the period from June, 2006 to April, 2007 to study the effect of shoot maturity and time of operation on the success and survivability of detached litchi air layer through different techniques. The experiment was conducted in two different phases one for preparation of air layers and other for techniques adopted on detached layers before planting the layers in the nursery bed. The 1st phase consisting of two factors: (i) shoot maturity viz., Juvenile shoot, old shoot (ii) time of operation viz., 1st week of June, 1st week of July, 1st week of August and the second phase of the study, involved techniques of planting the detached layers as the 3rd factor. The experiment was laid out in the Randomized Complete Block Design (RCBD) with three replications. For air layering healthy, disease free, lateral shoots of green to deep brown coloured of the immediate past season growth branch showing diameter from 0.846 to 2.54 cm were selected as juvenile shoot. One year old mature light brown to greyish coloured branches were selected as old shoot. Layering was done in three times viz., 1st week of June, July and August by removing 3 cm bark and scrapping to remove the cambium layer. The wood was then covered with moistened rooting medium with the help of a piece of clear polythene sheet (size: 20 × 15 cm). The two ends of the wrapping material were carefully tied up thoroughly with thin rope and left for rooting. Data were recorded on percentage of success in rooting, number of roots per layer, length of roots per layer, number of shoots per layer, number of leaves per layer and thus percentage of survivability were recorded. The differences between treatment means were adjudged by Least Significance Difference (LSD) test at 5 and 1% levels of probability.

Source of Information: J. Agrofor. Environ. 1(2): 147-148, 2007; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Juvenile shoot showed the best performance regarding all parameters except number of roots per layer. Juvenile shoot showed maximum percentage of success (77.80) in rooting. The highest percentage of rooting success (80.83), the longest root (8.21 cm) per layer and maximum percentage of survivability (77.72) were achieved from the operation of 1st week of July.

Knowledge Management: Journal