Pantnagar Journal of Research

Abstract

The present investigation an effective plant growth regulator to improve growth and productivity of rice in North-Western Himalayan region of India was conducted at NEB Crop Research Centre of G. B. Pant University of Agriculture and Technology, Pantnagar. The eight treatment combinations viz., Mepiquat Chloride 5% AS 50 g a.i./ha in 1000 mL/ha at MT (T1 ), Mepiquat Chloride 5% AS 62.5 g a.i./ha in1250 mL/ha at MT (T2 ), Mepiquat Chloride 5% AS 125g a.i./ha in2500 mL/ha at MT (T3 ), Mepiquat Chloride 5% AS 50g a.i./ha in1000 mL/ha at PI (T4 ),Mepiquat Chloride 5% AS 62.5g a.i./ha in1250 mL/ha at PI (T5 ), Mepiquat Chloride 5% AS 125ga.i./ha in2500 mL/ha at PI (T6 ),Mepiquat Chloride 5% AS 50ga.i./ha in1000 mL/ha at MT and PI(T7 ) and Untreated Control 100 RDF(T8 ) were evaluated with three replications under completely Randomized Block Design. The experiment was evaluated to see the effect of above treatments towards Growth, Yield and Productivity of Rice. The result of study revealed that treatment Mepiquat Chloride 5% AS 62.5 g a.i./ha in1250 mL/ha at MT stage resulted in significantly higher grain, straw and biological yield than all other treatments. Therefore, it was concluded that treatment Mepiquat Chloride 5% AS 62.5 g a.i./ha in1250 mL/ha at MT stage could be recommended for sustaining yield and productivity of rice under tarai conditions of Uttarakhand.