Document Type: Original Article


1 Tea Research Institute, Sheikh Zahed Street, Lahijan, Guilan, Iran

2 Department of Agricultural Machinery Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran


Tea is very important product in many countries due to huge consumption in the world and its valuable contains. The traditional harvesting method needs to be improved due to its effect on yield and quality. Mechanical plucking as a substitution to conventional method is spreading quickly and is necessary to be investigated for proper adoption. One of crucial factor has been noted to be the height of harvesting in this method, hence identifying the most appropriate height was aim of this study. The research was conducted in a research station of Fashalem located in the North part of Iran, Guilan province during last season. Treatments at four plucking height level of 5, 10 and 15 cm plus control (Plucking with secateurs) and their effects on tea hybrid bushes were considered. Regarding quality, parameters consisted revenue of total green leaf and the leaf standard, Tannin of green leaf and solid material contain in of green leaf were determined. Study was performed using randomized complete block design with three replications. The results indicated that plucking height of 5 centimeter, in total green leaf and standard leaf was significantly higher than other heights. Moreover 5 cm plucking height showed maximum amount of tannin and solid material compared to the other treatments. There. The effect of time was found to be significant for different parameters of quality. 


Barbora AC and Baruah DC (1996). Response of tea plant types to shear plucking. Two Bud. 43(2), 20- 24.
Bore JK and Ng'etich, WK (2000). Mechanical harvesting of tea. Tea, Kenya. 21(1), 19–23.
Dalimoenthe SL (2004). Reducing the cost of tea plucking without loss of quality. International Journal of Tea Science, India. 3(3/4), 49-59.
Hassanpour Asil M (2003). Evaluating the effect of plucking height on tea green leaf yield and its quality. Proceedings of 4th Horticulture Science Conference, IRAN. 338-339.
Hudson JB (1998). Enhancing harvesting efficiency of pluckers. United Planters' Association of Southern India joint area scientific symposium-VII (JASS-VII), held at Chikmagalur, Karnataka, on 20-21 March 1998. Bulletin of UPASI Tea Scientific Department, India. 51, 31- 33.
Laing Y, Lu J, Zhang L, Wu Y (2002). Estimation of black tea quality by analysis of chemical compositions. FOOD CHEM. 80, 283-290.
Lakin A (1989). Food analysis Practical Handout. Reading University, UK.
Mwakha E (1990). Response of seedling tea to height and frequency of mechanical harvesting in Kenya highlands. Journal of Tea. 11, 8-12.
Mwakha E (1991). Response Clonal tea response to plucking standard and round length in the first year after recovery from pruning. Journal of Tea. 12, 89-96.
Nakano T, Morita A, Tani H and Suzuki N (1996). Stratiform analysis of growth, total nitrogen, free amino acid and neutral detergent fiber concentration of new shoots in mechanically-plucked tea (Camellia
sinensis L.) bush. Japanese Journal of Crop Science, Japan. 65(4), 612-617.
Obanda M, Owour PO, Mangoka R, Kavoi MM (2004). Changes in thearubigins fractions and theaflavin levels due to variations in processing conditions and their influence on black tea liquor brighness and total color. Food Chem. 85(2), 163-173.
Owuor PO, and Obanda M (1998). The changes in black tea quality due to variations of plucking standard and fermentation time. Food Chem. 61(4), 435-441.
Ramaswamy R, Ramaswamy P and Ravichandran R (1998). The impact of mechanization of tea harvesting on the quality of south Indian CTC teas. Food Chem. 63(1), 61-64.
Sanjay R, Baby UI, Sasidhar R and Premkumar R (2003). Impact of harvesting methods on grey blight incidence. Newsletter UPASI Tea Research Foundation, India. 13, 14–26.
Satyanarayana N (1995). Techno-commercial aspects of shear harvesting in tea. Planters' Chronicle, India, August, PP. 361-362.
Sharma DK and Sharma KL and Mathew NM (1998). Standardization of tipping – plucking height for a light pruned section of china hybrid tea ( Camellia sinensis ( L/O, Kuntze)) grown in Himachal Pradesh
hallayma, India, PP. 228–229.
Sharma VS (2004). Integration of agro-techniques for higher plucker productivity and lower harvesting costs. International Journal of Tea Science. 3(3/4), 39-48.
Sivapalan P and Kulasegaram S (1986). Hand Book on Tea. Tea Research Institute of Sri Lanka. Talawakele, Srilanka, 220 p.
Sud RG and Badyal J (1989). Varietal and seasonal variations chemical constituents of tea (Camellia sinensis (L.) O. kuntze) in Himachal Pradesh. S. L. J. Tea Sci. 58(1), 73-78.
Thompson RD, (2000). Coffee & Tea. Journal AOAC. chapter 30, p 12