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Effect of Leaf Retention and Shade Duration on Survivability and Field Establishment of Litchi Layer Age

M. M. Khatun

M.A. Hossain

Abstract/ Executive Summary:

An experiment was conducted at the Fruit Research Farm of HRC, BARI, Joydebpur, Gazipur during June 2008 to September 2009. There were two factor in this experiment viz., leaf retention and shade (40%) duration. The experiment consisted of three leaf retention viz., retention of all leaves, retention of 50% leaves and retention of no leaves and three shades duration viz., farmer’s practice, three months shade and six months shade. The two factor experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Retaining 50% leaves gave highest rate alive layerage at 3MAS (92.59%), 6MAS(92.59%) and 9MAS(92.59%) and 12 MAS (85.18%). Six months shade gave highest percentage (88.90%) of alive layerage compared to farmer’s practice (81.49%) at 3MAS. The highest (81.49%) number of alive layerage was also recorded from three months shade at 12 MAS. Maximum number of leaves per layerage (53.50) was obtained from three months shade at 12 MAS. Maximum number of shoots per layerage (7.28) was recorded from farmer’s practice at 9 MAS. The highest percentages of alive were recorded from retaining 50% leaves and kept under three months shade at 3 MAS (100%), 6 MAS (100%), 9 MAS (100%). Retention of 50% leaves and kept under six months shade also gave similar results at 3 MAS, 6 MAS and 9 MAS in case of highest percentages of alive layerage. The highest percentages of alive layerage (100%) were recorded from retaining 50% leaves and kept under three months shade at 12 MAS.

Keywords: Effect of leaf retention,Shade duration, Survivability, Litchi layerage

Location: Fruit Research Farm of HRC, BARI, Joydebpur, Gazipur

Start Date: 00-06-2008

End Date: 00-09-2009

Program Area: Variety and Species

Commodity: Litchi

Objectives:

To obtain higher percentages of success in litchi layerage

Methodology:

The experiment was conducted at the Fruit Research Farm of HRC, BARI, Joydebpur, Gazipur during June 2008 to September 2009. There were two factor in this experiment viz., leaf retention and shade (40%) duration. The experiment consisted of three leaf retention viz.,retention of all leaves, retention of 50% leaves,and retention of no leaves and three shade duration viz.,farmer’s practice, three months shade and six months shade. The two factor experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Thus there were (3×3) 9 treatment combinations. Ten layerage were prepared in each unit plot. A total number of 270 (9 × 3 × 10) layerage were prepared in the month June, 2008. Marcots were taken in June during conditions of warm temperatures, high humidity and frequent rain as suggested by Storey (1973). Branches from second year growth of about 2 cm in diameter and 80 cm long from well-developed trees, free from pests and disease were selected (Loebel, 1976; Datta et. al ., 1995). However, 50 % soil and 50% cow dung were mixed and polyethylene sheets were exploited in this experiment. White colour roots developed from marcots in transparent polyethylene after 1-1.5 months. Marcots were detached from the parent tree once they have formed sufficient roots to survive on their own. The appearance of old roots which turn brown was a good indication. It taken two months. The marcot was carefully removed from the plastic since the delicate at this stage, and planted in a well drained potting mix in a polybag (6″×8″) on the same day in a lath house. The total number of marcots was divided into three and leaves were removed from marcots according to treatment (retention of all leaves, retention of 50% leaves and retention of no leaves). Leaves were removed with a sharp knife. All marcots maintaining leaf retention again divided into three and set on three shades (farmer’s practice, three months shade and six months shade). In farmer’s practice shade was done by the help of coconut leaves and another two shades were given by double layer black net. In farmer’s practice shade was 100% and under black net shade was 40%. These were measured by luxmeter. Black net was removed from the goottee after three months in one treatment. Another black net was also removed from the goottee after six months from another treatment. From farmer’s practice shade was removed after one year. Watering was done in one day interval on layerage. Weeding was done when weed appeared. Data were recorded at three months interval up to one year, i.e., at three months, six months, nine months and twelve months after setting of goottee on different shades. Data in respect of number of alive layerage, new shoots per layerage, and leaves per layerage, growth status and light intensity at different days after setting were recorded and analyzed statistically.

Source of Information: Annual Research Report, HRC, BARI, Joydebpur, Gazipur,2006-2010

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

A significant interaction between leaf retention and shade duration was observed for all the characters recorded. Wide variation was found among the treatment combinations in respect of number alive layerage at 3 MAS, 6 MAS,9 MAS and 12 MAS, number of leaves and new shoots per layerage. Maximum alive layerage were recorded from L2S2 at 3 MAS (100), 6 MAS (100), 9 MAS (100). L2S3 gave similar results at 3 MAS, 6 MAS and 9 MAS in case of highest rate of alive layerage. Minimum alive layerage was observed in L1S2 at 3MAS (66.67%), 6 MAS (55.57%) and 9 MAS (55.57%). The highest percentages of alive layerage (100%) were recorded from L2S2 and the lowest percentages of alive layerage (55.57) were obtained from S1L1 and S1L2 respectively, at 12 MAS. Maximum number of leaves per layerage (76.72) was obtained from L3S2 and that was minimum (34.77) in L3S3. Number of shoots per layerage (8.65) was maximum recorded in L3S2 and minimum (4.60) in L2S3.Considering survivability and growth, the combination 50% leaves with three months shade was found superior.

Knowledge Management: Report/Proceedings