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Yield Performances and Cup Quality of Some BTRI Test Clones of Tea

M.I. Hossain
Principal Scientific Officer (in-charge)
Botany Division, Bangladesh Tea Research Institute, Srimangal, Moulvibazar,Bangladesh

M.J. Dutta
Bangladesh Tea Research Institute, Srimangal, Moulvibazar, Bangladesh

A. Q. Khan
Ex. Director
Soil Science Division, Bangladesh Tea Research Institute, Srimangal, Moulvibazar, Bangladesh

M.S.A. Mamun
Seniro Scientific Officer
Entomology Division, Bangladesh Tea Research Institute, Srimangal, Moulvibazar, Bangladesh

M.M. Rana
Scientific Officer
Agronomy Division, Bangladesh Tea Research Institute, Srimangal, Moulvibazar, Bangladesh

Abstract/ Executive Summary:

A long term experiment was conducted to investigate the yield and quality performances of four vegetative propagated test clones of tea coded as A/8/01, A/17/22, A/22/27 and A/22/40 at Bangladesh Tea Research Institute (BTRI) farm during 1996-2010. A standard clone BT₁ was considered as control. Cuttings of the test clones were collected from the selected bushes of Amo tea estates and were raised at BTRI nursery. Then saplings were put to long term yield and quality trial following Latin Square Design (LSD) with 3 replications. The green leaf was harvested at weekly interval during the plucking season starting from mid March to mid December throughout the experimental period. Yield data were recorded and analyzed statistically using MSTAT programme. Results of the experiment revealed that among the test clones A/22/40 gave the highest significant yield of 3509.1 kg ha^-1 of made tea followed by BT₁(3203.69 kg ha^-1), A/8/01 (2912.24 kg ha^-1), A/17/22 (2817.76 kg ha-1) and A/22/27 (2278.78 kg ha^-1) from the average of 9 years (2002-2010) at mature stage. At immature stage i.e. 1^st year to 5^th year after plantation yield difference was insignificant. The overall cup quality of the test clones was assessed by conventional organoleptic test. The cup quality of A/8/01, A/17/22, A/22/40 as well as the standard clone BT₁ was found to be above average (AA) while the cup quality of A/22/27 was average (A). Considering the yield and quality potentials, the test clone A/22/40 has appeared quite promising to be released as a standard clone.

Keywords: Yield performances, Cup quality, Test clones

Location: BTRI experimental farm,Srimangal, Moulvibazar, Bangladesh

Start Date: 00-04-1996

End Date: 00-12-2010

Program Area: Crop-Soil-Water Management

Commodity: Tea

Objectives:

To study the long term yield and quality performances of four vegetatively propagated test clones of tea

Methodology:

Cuttings were collected from the selected bushes of Amo tea estate during 1994, which were raised at BTRI nursery. After the rooting trial in nursery, the selected test clones, namely A/8/01, A/17/22, A/22/27 and A/22/40 were put to long term yield and quality trial in 1996. The experiment was laid out in Latin Square Design (LSD) with three replications. Each plot was 5 m x 5 m in size with 105 cm (row-row) x 60 cm (plant-plant) spacing. There were 25 plants per plot. A standard clone BT1 was used as control for yield and quality comparison. The experiment was conducted in rain-fed condition. Yield data was collected during the cropping seasons throughout the experimental period. The N-P-K mixture was applied at young and mature tea as per BTRI recommendations. Pruning was followed for young tea: Decentre – Prune – Skiff – Prune – Skiff and for mature tea: Light Prune (LP) – Deep skiff (DSK) – Medium skiff (MSK) – Light skiff (LSK) cycle as per BTRI recommendations (Rashid, 1986). The green leaf was harvested at weekly interval during the plucking season starting from mid March to mid December throughout the experimental period. Yield data were recorded and analyzed statistically using MSTAT programme in a microcomputer. The mean values were adjudged by DMRT. The yield was expressed as mean yield of green leaf g plant-1 and is presented separately for immature (1^st - 5^th year) and mature (6^th- 14^thyear) stage. The made tea (kg ha^-1) was also calculated on the basis of 23% recovery from green leaf and 15875 plants ha-1 at 105 cm x 60 cm spacing. The quality performances of manufactured by CTC method in the BTRI mini tea factory. Quality of all the test clones and control were assessed weekly by conventional organoleptic test and scored numerically.

Source of Information: ISSN: 2224-0616 Int. J. Agril. Res. Innov. & Tech. 1 (1-2): 24-28, December, 2011 Available at http://www.ijarit.webs.com

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Test clone A/22/40 has appeared superior to the control BT1 and to be released as a standard clone. The other test clone A/8/8 has also found prospective in quality characters and yield, and can be used as a standard clone or valuable breeding stock.

Knowledge Management: Journal