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Long Term Performance of Different Clones for Yield and Quality Traits in Tea

M. I. Hossain
Principal Scientific Officer
Botany Division, BTRI, Srimangal, Moulvibazar, Bangladesh

M. Sq. Rahman*
Department of Agricultural and Industrial Engineering, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

Abstract/ Executive Summary:

A long term experiment was carried out to investigate the yield and quality performance of four vegetatively propagated test clones of tea, namely Cha/J1/10, SH/B/6/59, SH/B/6/62 and A/8/24 during 1997-2010. Cuttings of the test clones were collected from the selected bushes of Chandpore, Shumshernugger and Amo Tea Estates and were raised at BTRI nursery. The saplings were put to long term yield and quality trial following Latin Square Design with 5 replications and the unit plot size was 25 m² . The green leaves were harvested at one week interval during the plucking season starting from mid March to mid December in each year. Yield of green leaves at immature stage (2nd – 5 th year) was highest in BT2 (331g/plant) but green leaves at mature stage (6th - 13th year) was maximum in A/8/24 (832g/plant). The results revealed that the test clone A/8/24 gave the highest yield of 3036 kg ha-1 compared to 2731 kg ha-1 made tea for the control BT2, 2613 kg ha-1 for Cha/J1/10, 2008 kg ha-1 for SH/B/6/59, 2121 kg ha-1 for SH/B/6/62 at mature stage (2002-2009). At immature stage (2nd year to 5 th year after plantation) the highest made tea (1123 kg ha-1) was estimated from the clone Cha/J1/10 and the yield differences amongst the test clones were insignificant. The overall cup quality of the test clones was assessed by a conventional organoleptic test. The cup quality of all the clones including BT2 (control) was found to be above average. Twelve years (2nd to 13th year) data showed that the clone A/8/24 was the best in respect of yield and quality. Therefore, the outstanding clone, A/8/24 may be advanced for commercial exploration.

Keywords: BTRI, Cup quality, Test clones, Yield performance

Location: Chandpore, Shumshernugger and Amo Tea Estates and were raised at BTRI nursery

Start Date: 00-04-1997

End Date: 00-12-2010

Program Area: Quality and Nutrition

Commodity: Tea

Objectives:

As an out come of these works, the institute has so far released eighteen vegetative clones in the BT-series to the tea industries (Hossain et al., 2011). Few more test clones are in various stages of trial. The present experiment was carried out to study the long term yield and quality performance of four vegetatively propagated test clones of tea selected from Chandpore, Shumshernugger and Amo Tea Estates.

Methodology:

The experiment was carried out with four test clones of tea in the experimental field of BTRI main farm, during the period from April 1997 to December 2010. The cuttings were collected from the selected bushes of Chandpore, Shumshernugger and Amo Tea Estates in 1996. Before collection of cuttings chloroform test was done in estimating fermentation rates of tea clones which influences on made tea quality (Sanderson, 1963 and Samaraweera and Ranaweera, 1988). This method was also used in early selection of quality cultivars in tea breeding programs (Seurei et al., 1998 and Waheed et al., 2001). After rooting trial in the nursery the selected test clones, namely Cha/J1/10, SH/B/6/59, SH/B/6/62 and A/8/24 were put to yield and quality trial during 1996 at BTRI Main Farm, Srimangal, Moulvibazar. The experiment was laid out in Latin Square Design with 105cm x 60cm spacing of a 5m x 5m plot. There were 25 plants plot-1 . BT2 was used as a standard (control) for yield and quality comparison. The experiment was conducted in rainfed condition. Fertilizers were applied at young and mature stages as per BTRI recommendations (Kibria and Uddin, 1998; Kibria and Rashid, 1994). Both young and mature tea plants were pruned followed as per BTRI recommendation (Shahiduzzaman et al., 2002). Decentre-Prune-Skiff-Prune-Skiff was applied for tea plants and Light Prune-Deep Skiff-Medium Skiff-Light Skiff was for mature tea plants (Rashid, 1986). The green leaves were harvested at one-week interval throughout the plucking season, starting from mid March to mid-December in each year. Yield of green leaves were recorded and analyzed statistically in MSTAT programme. The mean values were separated by DMRT. Yield of green leaves g plant-1 was separately obtained at immature (2nd - 5 th year) and mature (6th - 13th year) stages. The made tea (kg ha-1) was also calculated on the basis of 23% recovery from green leaves against 15875 plants at 105 cm x 60 cm spacing. The quality performance of all the test clones including the control were assessed after manufactured by CTC (Crushing, Tearing and Curling) method in the BTRI mini tea factory.

Source of Information: Journal of Science and Technology 11(June 2013): 138-143

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the yield performance and quality standard throughout the study period compared to the control BT2, the test clone A/8/24 appeared superior may be released as a standard clone. The other test clone, Cha/J1/10 was also prospective in quality characters and yield and can be used as an alternative standard clone or may be maintained as valuable breeding stock.

Knowledge Management: Journal