Seasonal and Clonal Differences in Shoot Extension Rates and Numbers in Tea (Camellia sinensis)
- 1 January 1990
- journal article
- research article
- Published by Cambridge University Press (CUP) in Experimental Agriculture
- Vol. 26 (1), 83-98
- https://doi.org/10.1017/s001447970001543x
Abstract
Shoot extension rates and numbers recorded over an 18 month period in Tanzania from three contrasting clones were analysed to determine variation between and within seasons. Clonal differences in base temperatures for shoot extension ranged from 10.3 to 14.5.degree. C, whilst variability in the response of shoot growth rates to temperature could be ascribed to the shoot selection technique employed. Considerable clonal variation in shoot population densities occurred, with maxima ranging from 200 to 1200 shoots m-2. Total active shoot extension, the product of shoot growth rates and population densities, varied between 4 and 25 m m-2 week-1, shoot numbers being the dominant component. The implications of these results are discussed in terms of shoot measurement techniques, clonal selection criteria, yield modelling and harvesting policies.This publication has 10 references indexed in Scilit:
- A Water Stress Index for Tea (Camellia sinensis)Experimental Agriculture, 1989
- Yield Distribution in Irrigated tea (Camellia Sinensis) at Two Sites in Eastern AfricaExperimental Agriculture, 1987
- Environmental Factors Affecting the Yield of Tea (Camellia sinensis). II. Effects of Soil Temperature, Day Length, and Dry AirExperimental Agriculture, 1982
- Environmental Factors Affecting the Yield of Tea (Camellia sinensis). I. Effects of Air TemperatureExperimental Agriculture, 1982
- Growth and Yield of the Tea BushExperimental Agriculture, 1981
- The Banjhi (Dormancy) Cycle in Tea (camellia sinensis)Experimental Agriculture, 1981
- Weather, Physiology and Seasonality of Tea (Camellia sinensis) Yields in MalawiExperimental Agriculture, 1979
- Simulation of Intraseasonal Yield Fluctuations of Tea in MalawiExperimental Agriculture, 1977
- A Modified Sine Wave Method for Calculating Degree Days 1Environmental Entomology, 1976
- Irrigating seedling tea in Southern Tanzania: effects on total yields, distribution of yield and water useThe Journal of Agricultural Science, 1974