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Yield and Quality Performances of Four Tea Test Clones

M. I. Hossain
Bangladesh Tea Research Institute, Srimangal 3210, Moulvibazar, Bangladesh

A. K. M. Golam Sarwar
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

M. S. A. Mamun
Bangladesh Tea Research Institute, Srimangal 3210, Moulvibazar, Bangladesh

M. Ahmed
Bangladesh Tea Research Institute, Srimangal 3210, Moulvibazar, Bangladesh

Abstract/ Executive Summary:

An experiment was carried out during 1994–2007 to investigate the yield and quality performances of four vegetatively propagated test clones of tea viz. SH/D/11/13, SH/D/11/333, B/HB/2/3 and B/HB/6/4. Two clones, BT1 and TV23, were used as check for quality and yield, respectively. Cuttings of the test clones were collected from the selected bushes of Shumshernugger Tea Estate and hybrid lines of Bangladesh Tea Research Institute (BTRI) and were raised at BTRI nursery. Then the saplings were managed for long term yield and quality trial following randomized complete block design with 5 replications. The green leaf was harvested at weekly interval during the plucking season starting from mid March to mid December throughout the experimental period. The overall cup quality of the test clones was assessed by conventional organoleptic test. At the immature stage (2^nd–5^th year after plantation), all test clones showed similar yield trend as that of check BT1. At the mature stage (6^th–13^th year), the test clones SH/D/11/333 and B/HB/6/4 gave the significantly higher average yield (3095 and 3342 kg ha^–¹ made tea, respectively) compared to the check BT1 (3042 kg ha^–¹ made tea). The cup quality of all the test clones and BT1 was found to be “Above Average” while the cup quality of TV23 was “Average”. Considering the overall performances, the test clones SH/D/11/333 and B/HB/6/4 have been released as BT13 and BT14, respectively for commercial plantation in the tea estates.

Keywords: Yield Performance, Cup Quality, Test Clones

Location: Moulvibazar

Start Date: 00-00-1994

End Date: 00-00-2007

Program Area: Variety and Species

Commodity: Tea

Objectives:

The present experiment was carried out to study the long term yield and quality performances of four vegetatively propagated test clones; SH/D/11/13, SH/D/11/333, B/HB/2/3 and B/HB/6/4,

Methodology:

The experiment was carried out in the main farm of BTRI with four test clones viz. SH/D/11/13 and SH/D/11/333 selected from Shumshernugger Tea Estate (T.E.) and B/HB/2/3 and B/HB/6/4 from BTRI hybrid lines, and two check (control) clones viz. BT1 and TV23 during the period from April 1994 to December 2007. The local standard clone BT1 and a popular Indian yield clone TV23 were used as check for quality and yield comparison, respectively (Table 1). General characteristics of four test clones and two check clones are given in Table 2. Cuttings were collected from the selected bushes of Shumshernugger T.E. and BTRI hybrid lines during 1994, which were raised at BTRI nursery. After rooting trial in the nursery, the selected test clones viz. SH/D/11/13, SH/D/11/333, B/HB/2/3 and B/HB/6/4 were put to long term yield and quality trial during 1996 at BTRI Farm. The experiment was laid out in a randomized complete block design with 5 replications at the standard (105cm x 60cm) spacing (Dutta and Alam, 2001). The experiment is conducted in rainfed condition. Fertilizer was applied at young and mature tea as per BTRI recommendations (Kibria and Rashid, 1994; Kibria and Uddin, 1998). Young and mature tea pruning were followed as per BTRI recommendations (Rashid, 1986; Shahiduzzaman et al., 2002). Yield data was collected during the cropping seasons throughout the experimental period. 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 in MSTAT programme. The mean values were adjudged by Duncan's new multiple range test (DMRT). The yield was expressed as mean yield of green leaf (g plant^–¹) and has presented separately for immature (2^nd–5^thyear) and mature (6^th–13^th year) stages. The made tea (kg ha^–¹) was also calculated on the basis of 23% recovery from green leaf with the population density 15,875 plants ha^–¹ (at 105 cm x 60 cm spacing). The quality performances of all the test and check clones, manufactured by crush, tear and curl (CTC) method in the BTRI mini tea factory, were assessed weekly by conventional organoleptic test and scored numerically.

Source of Information: J. Bangladesh Agril. Univ. 10(1): 33–38, 2012, ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The test clones SH/D/11/333 and B/HB/6/4 have been released as BT13 and BT14, Considering the overall performances throughout the study period compared to the check BT1, the test clones SH/D/11/333 and B/HB/6/4 appeared superior and confirmed their earlier provisional released as standard clones.

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