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Effect of Variety and Time of Operation on the Success, Growth and Survivability of Air-layers in Two Varieties of Litchi

S. Razia

M.A. Rahim

M.S. Alam

Abstract/ Executive Summary:

An experiment was conducted at BAU-Germplasm centre of Fruit Tree Improvement Project, Department of Horticulture, Bangladesh Agricultural University (FTIP-BAU-DH), Mymensingh during the period from March 2006 to April 2007 to study the effect of variety and time of operation on the success, growth and survivability of Air-Layers in two varieties of Litchi. Two varieties (China-3 & Mongalbari) 14 times of layering (starting from March 12 to 18 June 2006) were included in the study. China-3 showed better success in rooting (85%) than Mongalbari (75%). Layering done in 16 April gave the best result on the percentage of success in the survivability of detached air-layer. China-3 significantly increased the number of shoots, leaves and percentage of survivability of air-layers. Combined effect of variety and time of operation (layering done on 9 April) had increased the percentage of survivability of air-layers as well as also increased the number of shoots and leaves of air-layers. It may the concluded that air-layering should be done in the month of April under Mymensingh condition for better success, growth and survivability of litchi layers. Air-layering done in the month of April give better survivability and growth performance.

Keywords: Litchi, Air-layer, Survivability, Growth

Location: BAU-Germplasm centre of Fruit Tree Improvement Project, Department of Horticulture, Bangladesh Agricultural University (FTIP-BAU-DH), Mymensingh

Start Date: 00-03-2006

End Date: 00-04-2007

Program Area: Variety and Species

Commodity: Litchi

Objectives:

1. To investigate the effect of varieties of time of layering on their success, growth and survivability of air layering of litchi.

Methodology:

The experiment was conducted at the Germplasm Centre of Fruit Tree Improvement Project (FTIP), Bangladesh Agricultural University, Mymensingh during the period from March, 2006 to April, 2007 to study the effect of variety and time of operation on the survivability and growth performance of air-layers of two varieties of litchi. The varieties taken for the study were China-3 & Mongalbari. Fourteen litchi trees of the variety Mongalbari and fourteen that of China-3 were selected for air-layering.The approximately diameter of the branches were taken as 0.847 cm to 2.54 cm. The two-factor experiment consisted of two types of variety (Factor A) and fourteen levels of time of layering (Factor B). Variety (Factor A): China-3 (V₁); Mongalbari (V₂); Time of layering (Factor B): For the propagation of litchi fourteen times of layering were used: i) T₁=March 12, ii) T₂ = March 19, iii) T₃=April 2, iv) T₄=April 9, v) T₅=April 16, vi) T₆ = April 23, vii) T₇=April 30, viii)T₈=May 7, ix)T₉=May 14, x)T₁₀=May 21, xi)T₁₁=May28, xii)T₁₂=June 4, xiii) T₁₃= June 11 and xiv) T₁₄=June 18.The layers were separated from the mother plant when the outer surface of rooting medium and inner surface of the polyethylene sheet was full of newly formed roots. The rooted litchi layers were separated from the mother plant in one chance. Then the layers were planted in polybag and after two months, the polybags were transferred in the nursery bed. Rooting media consisting of well-decomposed cowdung and soil were used in this present research work. Soil and well-decomposed cowdung were taken in 1:1 ratio and mixed thoroughly with sufficient water to make mud dough. On the detachment of air-layers from the mother plant, observation and related data were collected to assess different parameters of propagation. Data on number of leaves and shoots were counted at 15 days interval. The collected data on different parameters under different experiments were statistically analyzed wherever necessary following factorial experiment in Randomized Complete Block Design (RCBD) with three replication.

Source of Information: J. Agrofor. Environ. 3 (2): 145-148, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Effects of variety, time of operation (layering), and their combination showed significant influence on the percentage of success in the survivability, number of shoots and number of leaves per layer. The highest survivability was observed in 16 April (T₅) treatment and the T₃ (2nd April) treatment produced the highest number of shoos and leaves per layer. The interaction effect of variety and different time of operation (layering) had significant effect on the percentage of survivability and number of shoots and leaves at different DAP. So, it may be suggested from the present study that the operation (layering) done in the month of April with variety China-3 used in litchi propagation through air-layers should be done for better survivability and growth performance.

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