Cotton Data Sets Over the years, scientists
at the Agriculture Research Service (ARS) in Beltsville, Maryland, have been working with
various Universities collecting data for use with cotton model development.
Objective(s):
The objective was to develop a comprehensive, mechanistic cotton simulation model
incorporating recent advances in cotton physiology, mathematical analysis, modeling
techniques and computer science. To accomplish this task studies were conducted to
evaluate (1) the effects of variables associated with global climate change, i.e. carbon
dioxide, temperature, water stress and plant nutrition on cotton physiology, especially on
growth, developmental rates, photosynthesis, respiration, transpiration and water use
efficiency, (2) to study the direct and interactive effects of temperature and carbon
dioxide on mainstem and branch expansion rates, node initiation, fruiting, leaf initiation
and expansion rates, and (3) to develop a database for comprehensive cotton models which
can be used for predicting the effects of future climate change on physiological process
in cotton production.
Several field, greenhouse and controlled- environment studies on
cotton crops were conducted. The interactive effects of carbon dioxide, temperature and
nitrogen nutrition on physiological processes of cotton were determined. Data on root
growth, stem elongation, node addition, leaf initiation and expansion, fruiting and
abscission were summarized. The effects of carbon dioxide, temperature, and nitrogen
nutrition on cotton photosynthesis, respiration, transpiration, and water use efficiency
were also summarized. Studies on measuring root growth and development were initiated for
model development. Over 104 comprehensive data sets were collected consisting of data on
plant, soil, weather and management variables for validation of the ARS cotton model.
|