Journal of Stress Physiology &
Biochemistry, Vol. 9 No. 4
2013, pp. 251-278 ISSN 1997-0838
Original Text Copyright (cc) 2013 by Sawan
ORIGINAL ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 3
Studying the Relationship
Between Climatic Factors and Cotton Production by Different Applied
Methods
Zakaria M. Sawan
Cotton Research Institute, Agricultural
Research Center, Ministry of Agriculture & Land Reclamation, 9
Gamaa Street, 12619, Giza, Egypt
*E-Mail: zmsawan@hotmail.com
Received July 15, 2013
This study
investigates the statistical relationship
between climatic variables and aspects of
cotton production (G.
barbadense), and the effects of
climatic factors prevailing prior to flowering
or subsequent to boll setting on flower
and boll production and retention
in cotton. Also, the study covers the
predicted effects of climatic factors
during convenient intervals (in days) on cotton flower and boll
production compared with daily observation. Further, cotton
flower and boll production as affected
by climatic factors and soil
moisture status has been considered. Evaporation,
sunshine duration, relative humidity , surface soil temperature at 1800
h, and maximum air temperature are the
important climatic factors that significantly
affect flower and boll production. The
least important variables were found
to be surface soil temperature at 0600 h
and minimum temperature. The five-day interval
was found to be more adequately and
sensibly related to yield parameters.
Evaporation, minimum humidity and sunshine
duration were the most effective climatic
factors during preceding and succeeding periods on
boll production and retention. There was a negative correlation between
flower and boll production and either
evaporation or sunshine duration, while
that correlation with minimum relative
humidity was positive. The soil moisture status
showed low and in significant correlation with flower and boll
production. Higher minimum relative humidity, short
period of sunshine duration, and low temperatures enhanced flower and
boll formation.
Key
words: Cotton flower and boll production, boll retention,
evaporation, relative humidity, soil moisture status, sunshine
duration, temperature
