Effects of sowing dates and rice cultivars of different maturity classes under direct-seeded rice-wheat system
| dc.contributor.advisor | Punia, S.S. | |
| dc.contributor.author | Dahiya, Sucheta | |
| dc.date.accessioned | 2018-04-17T09:14:28Z | |
| dc.date.available | 2018-04-17T09:14:28Z | |
| dc.date.issued | 2017 | |
| dc.description.abstract | A field experiment was conducted during kharif and rabi seasons of 2014-15 and 2015-16 at CIMMYT-CSISA Research Farm of CSSRI, Karnal to determine the ‘Effects of sowing dates and rice cultivars of different maturity classes under direct-seeded rice-wheat system’.The experiment was carried out in a split- plot design with four sowing dates and three cultivars during Kharif season viz. 10th June, 25th June, 10th July and 25th July as main plot treatment and three cultivars viz. Arize-6129, Arize- 6444 and Pusa-44 as sub plot treatment with three replications. During Rabi season sowing dates was 1st November, 10th November, 23rd November and 6th December and the cultivar of wheat used was HD- 2967.The growth parameters (number of established plant/m2, number of tillers/m2, periodic biomass accumulation and leaf area index) and yield attributes like number of panicles, filled and total florets per panicle, test weight decreased with delay in sowing dates. Paddy yield produced during 10th June and 25th June showed significantly at par yield with each other during 2014 and 2015 year of sowing. Rest of the treatments differs significantly with each other. Paddy yield decreased by 2.93, 19.57 and 56.20 % during 2014 and 2.96, 19.44 and 56.68 % during 2015 under 25th June, 10th July and 25th July sowing, respectively as compared to 10th June sowing. Early maturing cultivar Arize-6129 produced maximum growth parameters and yield attributes while the minimum with late maturing cultivar Pusa-44 during 2014 and 2015 experimental year. Arize-6129 (early maturing) and Arize-6444 (mid-maturing) showed significantly at par yield with each other. Yield reduction of 8.34 and 15.50 % during 2014, and 8.75 and 15.71 % during 2015 have been recorded with cultivar Arize-6444 and Pusa-44 as compared to Arize-6129. Net return (Rs/ha) was also recorded highest with sowing date of 10th June but B:C ratio was high with 25th June sowing date. Arize-6129 showed best results among others cultivar. Growth parameter (number of established plant/m2, dry matter accumulation and leaf area index) and yield attributes number of spike and test weight showed decreasing trend with delay in sowing date. There was significant increase in grain yield of wheat with the delaying of sowing dates, however, the grain yield recorded at 1st November (5497,5572 kg/ha) and 10th November (5394, 5497 kg/ha) was statistically at par with each other. Sowing date of 1st November produced 1.87, 9.46 and 18.52 % and 1.35,8.82 and 17.45% higher grain yield over 10th November, 23rd November and 6th December, respectively during 2014-15 and 2015-16. Profitability parameters were showed maximum at 1st November sowing date. System productivity also showed maximum yield when crop was sown on 10th June along with Arize-6129 cultivar. But B:C ratio was found maximum where the crop was sown on 10th June with Pusa-44. APSIM modulation was near to perfection as coefficient of regression was more than 0.8 for yield and biomass for both the rice and wheat. Hence, model fits very well for both the crops. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810043799 | |
| dc.keywords | Sowing date, Cultivars of different maturing classes, Growth, Yield, Phenology, Profitability, DSR, Wheat, APSIM | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | CCSHAU | en_US |
| dc.sub | Agronomy | en_US |
| dc.subject | null | en_US |
| dc.theme | Effects of sowing dates and rice cultivars of different maturity classes under direct-seeded rice-wheat system | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Effects of sowing dates and rice cultivars of different maturity classes under direct-seeded rice-wheat system | en_US |
| dc.type | Thesis | en_US |