Assessment of Climate Reactive Strategies for Improving Cotton Yield in Gujarat, India


A significant barrier to low cotton yield in rainfed cotton is moderate to severe moisture stress at the crucial period. The primary goals of the proposed study are to determine the levels of moisture stress in the Gujarat state’s rainfed cotton growing region and to offer suitable corrective measures through the development of water resource structures, the collection of extra rainwater during the rainy season, and the use of supplemental irrigation during dry spells and after the monsoon season. Therefore, it is crucial to calculate reference evapotranspiration (ETo), actual water demand, and a plan for using that water to increase rainfed cotton production. For 10 cotton-growing districts in Gujarat, India, daily meteorological data were gathered from 2001 to 2011 in an effort to solve these issues. Then, multiple regression analyses were performed to examine the relationships between lint yields, numerous meteorological factors, and crop evapotranspiration (ETc) at four critical stages of cotton growth. To calculate the water shortage, surplus, true evapotranspiration, soil storage, and change in soil water storage over a number of non-Bt and Bt cotton-growing years, calculations were done. From June to December, January to April, and the entire crop growth period, ETo was found to be 662-947, 414-687, and 1076-1596 mm, respectively, and rainfall was found to be 490-1150, 5.5-35, and 442-1210 mm. It is found from the meteorological data that more irrigation is required in rainfed circumstances both throughout the longer cotton growing season (January to April) and after the monsoon rains have stopped. The growth stage of the cotton boll may enable efficient utilisation of the rainwater that was conserved, ultimately increasing WUE and lint yield.

Author(s) Details:

R. B. Singandhupe,
ICAR-Central Institute for Cotton Research, Nagpur, India.

A. Manikandan
ICAR-Central Institute for Cotton Research, Nagpur, India.

D. Blaise,
ICAR-Central Institute for Cotton Research, Nagpur, India.

S. Chattaraj,
ICAR-National Bureau of Soil Survey and land Use Planning, Nagpur, India.

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Keywords: Climatic variables, climatic water balance parameters, rainfed cotton, reference ETo, WUE

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