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Effect of Growth Regulators on the Success of Trench Layering of Different Guava (psidium Guajava L) Varieties

M. G. Mohsin
Department of Agricultural Studies, Nabajug University College, Kushura, Dhamrai, Dhaka.

M. A. Hoque
Department of Agronomy and Agricultural Extension, Rajshahi University, Rajshahi.

A. J. Kakon
National Mashroom Development and Extension Center, Sobhanbagh, Savar, Dhaka-1340,

Abstract/ Executive Summary:

Guava (Psidium guajava L) can be propagated by both seeds and vegetative means. But seed propagation is not generally practiced since it takes many years to come into bearing, normally do not produce true-to-type and often bear fruits of inferior quality. Propagation through vegetative way can improve the quality and production of guava. Vegetative propagation by layering has a good scope for those plants. But moisture stress and shortage of mother plants as well as limited number of branches restricts the production of air-layer in large quantity. Other methods of propagation like trench layering can be done in the soil condition when easy maintenance of moisture level in the root zone is possible. Besides within the short period large number of propagules can be produced per unit area. Use of growth regulators accelerate profuse rooting and can save the plants from storm. Patel et al. (1996) observed that IAA + IBA promoted percentage of rooting, number of roots, length of roots, survival percentage of layers and shoot growth. IBA alone was better than IAA alone. So, the present experiment has been designed to investigate the different concentrations of growth regulators of guava trench layering on their survivability and growth performance.

Keywords: Guava, Fruit, Guava variety, Trench layering

Location: Fruit Research Station, Binodpur, Rajshahi.

Start Date: 00-05-2004

End Date: 00-05-2006

Program Area: Crop-Soil-Water Management

Commodity: Guava

Objectives:

To investigate the different concentrations of growth regulators of guava trench layering on their survivability and growth performance.

Methodology:

The present study was carried out at Fruit Research Station, Binodpur, Rajshahi during May 2004 to May 2006. In case of trench layering, mother layers were collected from air-layering which was done in the month of May, 2004. Layers collected through air-layering were planted at 90° angle maintaining a spacing of 90 cm x 70 cm in the month of July, 2004. After establishment (about one year), the mother layers were laid down on the ground at the bottom of the trench and fixed with the help of wire hook in the month of May. 2005. The laid layers were covered with rooting media (Soil+ well decomposed cowdung). After 15-20 days a large number of shoots were developed from the each node of the mother plant. When the bark of the shoot was reddish in color then layering was done at the base of the shoot by removing 4 cm long bark cylindrically and then scrapped exposing wood to remove the cambium layer from them with the help of a knife. Different concentrations of growth regulators in the form of paste were applied on the upper cut end of the exposed shoot. In case of control treatment, the same procedure was followed except that no use of growth regulators. The treated wood was then covered with the mixture of soil, well decomposed cowdung, sawdust and coconut coir. Root was formed about nineteen to twenty days after operation. After root formation the rooted layers were separated from the mother plant after 75 days (July, 2005) from the date of operation. Moderate pruning was done to the separated layers to check water loss from them through transpiration. Then the layers were planted in polybags and placed in a shady place and watering was done according to the need. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The collected data on different parameters were statistically analysed and the means were compared by LSD test.

Source of Information: Bangladesh Journal of Agriculture, Vol. 37 (1) 2012, BARC, 111-114.

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The result of the study revealed that the use of growth regulators had significant effect on the rooting success and survivability of guava. it can be concluded that the guava variety BARIGuava-1 with growth regulator, IBA 1200 ppm showed the best performance incase in rooting of trench lahyering.

Knowledge Management: Journal