Irrigating seedling tea in Southern Tanzania: effects on total yields, distribution of yield and water use
- 1 October 1974
- journal article
- research article
- Published by Cambridge University Press (CUP) in The Journal of Agricultural Science
- Vol. 83 (2), 363-378
- https://doi.org/10.1017/s0021859600052072
Abstract
SUMMARY: In a dry area of Southern Tanzania with a single rainy season irrigation during the six-month-long dry season (May-November) doubled the total annual yield of tea and at the same time evened its distribution over the year to some extent. Other factors including low temperatures limited growth rates during the period June-September despite irrigation, whilst a lull in production in November appeared to be unrelated to external factors. Roots were traced to depths of about 4·3 m and by the end of the dry season unirrigated bushes were drying the soil below 3m. In general total yields decreased with decreasing frequency of irrigation and quantity of water applied but because these plants were deep rooting they could withstand deficits up to 100 mm without a reduction in yield, equivalent to a loss of about 25% of the total available water in the profile. There was some evidence that the most economical use of water occurred when the soil was not rewetted to field capacity at each irrigation, although yields were then less. Irrigation also reduced the incidence of a stem canker, Phomopsis theae. The implications of these results to the tea industry of East Africa are discussed.Keywords
This publication has 11 references indexed in Scilit:
- The internal water status of the tea plant (Camellia sinensis): Some results illustrating the use of the pressure chamber techniqueAgricultural Meteorology, 1972
- The Climatic Requirements of the Tea Plant: A ReviewExperimental Agriculture, 1972
- Model of soil water use by teaAgricultural Meteorology, 1971
- The Effects of Water Availability on Tea Yields in UgandaJournal of Applied Ecology, 1971
- A study of the water use of tea in East Africa using a hydraulic lysimeterAgricultural Meteorology, 1970
- Diurnal Pattern of Water Potential in Woody PlantsPlant Physiology, 1968
- The Measurement of Sap Tension in the Petioles of Apple, Raspberry and Black Currant LeavesThe Journal of Horticultural Science and Biotechnology, 1968
- Growth, Water use and nutrient uptake from the subsoil by grass swardsThe Journal of Agricultural Science, 1967
- Tables for the Rapid Computation of the Penman Estimate of EvaporationEast African Agricultural and Forestry Journal, 1965
- COMPARATIVE WATER-USE OF SOFTWOOD PLANTATIONS AND BAMBOO FORESTEuropean Journal of Soil Science, 1962