Climatic variables: Evaporation, sunshine, relative humidity, soil and air temperature and its adverse effects on cotton production

Abstract Cotton yield is a function of growth rates, flower production rates, and flower and boll retention during the fruiting period. Information on the relationship between climatic factors and the cotton plant's ability to produce and sustain flower buds, flowers, and bolls will allow one to model plant responses to conditions that frequently occur in the field and to predict developmental rate or the formation of these organs. This study investigates the statistical relationship between various climatic factors and overall flower and boll production. Also, the relationship between climatic factors and production of flowers and bolls obtained during the development periods of the flowering and boll stage. Further, predicting effects of climatic factors during different convenient intervals (in days) on cotton flower and boll production compared with daily observations. 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 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.

[1]  Z. Sawan.  Nature Relation Between Climatic Variables and Cotton Production , 2014 .

[2]  J. Hatfield,et al.  Crop‐Specific Thermal Kinetic Windows in Relation to Wheat and Cotton Biomass Production , 1988 .

[3]  Shi Pei,et al.  Study of the relationship between boll weight in wheat-cotton double cropping and meteorological factors at boll-forming stage. , 2000 .

[4]  Z. Sawan.  Climatic Factors: Evaporation, Sunshine, Relative Humidity, Soil and Air Temperature and Cotton Production , 2014 .

[5]  Z. Sawan.  Climatic Factors; Cotton Production: Studying its Relationships byDifferent Applied Statistical Methods , 2016 .

[6]  K. R. Reddy,et al.  Interactions of CO2 enrichment and temperature on cotton growth and leaf characteristics , 1998 .

[7]  J. Bhatt.  Growth and flowering of cotton (Gossypium hirsutum L.) as affected by daylength and temperature , 1977, Journal of Agricultural Sciences.

[8]  Z. Sawan,et al.  Egyptian cotton (Gossypium barbadense) flower and boll production as affected by climatic factors and soil moisture status , 2010 .

[9]  G. Guinn.  Causes of Square and Boll Shedding in Cotton , 1982 .

[10]  D. Oosterhuis,et al.  Drought tolerance and foliar sprays of glycine betaine. , 2000 .

[11]  Stephen M. Schrader,et al.  Thylakoid membrane responses to moderately high leaf temperature in Pima cotton , 2004 .

[12]  R. Peterson,et al.  Relationship between dryland cotton yields and weather parameters on the Southern High Plains. , 1996 .

[13]  K. R. Reddy,et al.  Carbon dioxide and temperature effects on pima cotton growth , 1995 .

[14]  Z. Sawan,et al.  Relationships between climatic factors and flower and boll production in Egyptian cotton (Gossypium barbadense) , 2002 .

[15]  N. Draper,et al.  Applied Regression Analysis , 1966 .

[16]  G. Farquhar,et al.  Relative humidity‐ and ABA‐induced variation in carbon and oxygen isotope ratios of cotton leaves , 2000 .

[17]  Foster B. Cady,et al.  Combining Experiments to Predict Future Yield Data1 , 1972 .

[18]  Duan Ai-wang,et al.  Effects of different water application on lint yield and fiber quality of cotton under drip irrigation. , 2000 .

[19]  Luciano Mateos,et al.  Season length and cultivar determine the optimum evapotranspiration deficit in cotton , 1992 .

[20]  Z. Sawan,et al.  Response of flower and boll development to climatic factors before and after anthesis in Egyptian cotton , 2005 .

[21]  A Thermal Stress Index for Cotton , 1990 .

[22]  Duli Zhao,et al.  Physiological response of growth chamber-grown cotton plants to the plant growth regulator PGR-IV under water-deficit stress , 1997 .

[23]  W. Ehrler.  Cotton Leaf Temperatures as Related to Soil Water Depletion and Meteorological Factors1 , 1973 .

[24]  J. Bunce,et al.  Responses of Net Photosynthesis and Conductance to Independent Changes in the Humidity Environments of the Upper and Lower Surfaces of Leaves of Sunflower and Soybean , 1986 .

[25]  Z. Sawan,et al.  Effect of climatic factors during the development periods of flowering and boll formation on the production of Egyptian cotton (Gossypium barbadense L.) , 1999 .