1. General Model Information
Name: Cranfield University Plantation Productivity Analyser for Tea
Acronym: CUPPA_TEA
Main medium: terrestrial
Main subject: agriculture
Organization level: Population
Type of model: ordinary differential equations
Main application:
Keywords: Camellia sinensis, tea
Contact:
Robin Matthews
Silsoe College, Cranfield University, Beds. MK45 4DT, United Kingdom
phone: +44 (0) 1525 863008
fax: +44 (0) 1525 863384
email: r.b.matthews@cranfield.ac.uk
WWW: http://www.silsoe.cranfield.ac.uk/people/rmatthew.htm
Author(s):
Robin Matthews
Abstract:
The model simulates the behaviour of a population of shoots which develop and extend
independently at different rates to simulate the variation observed in natural
conditions. The number of shoots plucked at each harvest was found to be the crucial
determinant of yield. Based on evidence from well-irrigated and well-fertilised tea
in Tanzania, the model assumes that the seasonal pattern of yields is regulated by
photoperiod through its effect on shoot dormancy, with the significant production
peak normally obtained in September explained by the release from dormancy of a
large number of buds at the winter solstice. Seasonal fluctuations in temperature and
saturation deficit impose additional influences on patterns of shoot growth and
development.
Author of the Abstract:
Robin Matthews
II. Technical Information
II.1 Executables:
Operating System(s): Windows 95
download from CUPPA Home
II.2 Source-code:
Programming Language(s): Delphi v2.0 , available by request from the author
II.3 Manuals:
CUPPA-Tea User Manual
download from CUPPA Home
II.4 Data:
Input and output data follow DSSAT v3.0 standards. Sample datasets are provided with the model.
III. Mathematical Information
III.1 Mathematics
http://www.cranfield.ac.uk/CUPPA/Tea_int1.htm ( "Why model tea?")
This Page is accessible from CUPPA Home Page
III.2 Quantities
shoot numbers, yield, biomass - total, leaf, stem, roots, shootswater uptake - soil water, plant water statusnitrogen dynamics - plant & soil nitrogen concentrations
III.2.1 Input
daily weather data - solar radiation, min/max temps., rainfall, humiditysoil data - saturated, upper and lower water contents, initial soil nitrogen contentsclonal data - shoot growth parameters
III.2.2 Output
output of yield, component biomasses, water & nitrogen status at user-specified intervals
IV. References
V. Further information in the World-Wide-Web
VI. Additional remarks
The model was designed for use as a management tool by researchers and growers in the tea industry.
Last review of this document by: Contributed by Robin Matthews Tue Nov 11 14:29:00 1997
Status of the document:
last modified by
Tobias Gabele Wed Aug 21 21:44:41 CEST 2002