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Climate variability and its impact on maize productivity and net ecosystem exchange

 

   

 

 

Short duration and drought tolerant varieties in Eastern India

Gross primary productivity (GPP), plant respiration (RE), net ecosystem exchange (NEE) in relation with phenology and leaf area index of maize (July-November) were studied. The crop behaved as a net CO2 sink from vegetative stage (22 DAS) to milking stage and acted as a net CO2 emitter during maturity and early vegetative periods.


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Productivity of rainfed maize under enhanced carbon dioxide and its interaction with water deficit and elevated temperature

Maize hybrid DHM-117 was sown in Free Air Temperature Elevation (FATE) facility to assess the impact of high temperature on phenology, growth and yield. The FATE facility consisted of three 8 m diameter rings fitted with 24 arrays of ceramic infrared heaters of 2000 W capacity to elevate the canopy temperature by 3°C ± 0.5°C above the ambient canopy temperature (ET) and three FATE rings without any heating system as ambient (AT) control.

 

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In village Heeranar, Dantewada district, delayed onset of monsoon and deficit rainfall situations are common. Demonstration of drought tolerant variety Indira Barani Dhan-1 of rice was demonstrated with four farmers in 10 ha area during 2015-16. The variety performed well under drought situation and increase in yield was to the extent of 35.21% over local variety (21.3 q/ha).


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Short duration and drought tolerant varieties in Southern India

S. Raghuttahalli village of Chikkballpur district, short duration and early maturing finger millet variety ML-365 against GPU-28 in seven farmers’ fields were demonstrated. ML-65 variety gave yield 21.78 q/ha as compared to 15.65 q/ha by GPU-28. Further, it was found to be resistant to blast and ideal for both rainfed and irrigated conditions.


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