tailieunhanh - Response of different micro-climatic regimes on productivity and economics of aerobic rice (Oryza sativa L.) varieties in Assam

A field experiment was conducted in the Instructional Cum Research (ICR) Farm of Assam Agricultural University, Jorhat, Assam during autumn season of 2017. The experiment was laid out in a split-plot design with three replications. | 2021 10 03 1020-1025 International Journal of Current Microbiology and Applied Sciences ISSN 2319-7706 Volume 10 Number 02 2021 Journal homepage http Original Research Article https Response of different Micro-Climatic Regimes on Productivity and Economics of Aerobic Rice Oryza sativa L. Varieties in Assam Bidisha Borah1 and Kalyan Pathak2 Krishy Vigyan Kendra Nagaon College of Agriculture Jorhat Assam Agricultural University 785013 India Corresponding author ABSTRACT A field experiment was conducted in the Instructional Cum Research ICR Farm of Assam Agricultural University Jorhat Assam during autumn season of 2017. The experiment was laid out in a split-plot design with three replications. The treatments Keywords consisted of four micro-climatic regimes M in main plot viz. sowing of seed on 15th February M1 1st March M2 16th March M3 and 1st April M4 along with four Dry matter Upland different rice varieties V viz. CR-Dhan 205 V1 CR-Dhan 203 V2 CR-Dhan 204 rice Effective V3 and Inglongkiri V4 in sub plot. The results of the experiment revealed that tillers Growth among the different micro-climatic regimes the micro-climate associated with 1st Seeding date April recorded positive effect on growth and yield parameters in terms of number of Article Info total tillers dry matter accumulation number of effective tillers and grain yield 3004 kg ha followed by the micro-climate associated with 16th March sown crop. Among Accepted the varieties evaluated CR-Dhan 203 recorded the highest value in terms of number of 10 February 2021 Available Online total tillers dry matter accumulation and number of effective tillers 187 m2 followed 10 March 2021 by Inglongkiri CR-Dhan 204 and CR-Dhan 205. The highest grain yield of 2860 kg ha recorded in rice variety CR-Dhan 203 was significantly superior to that of other varieties except Inglongkiri. In terms of economics the crop sown on 1st April .