Management of nitrogen in dry direct seeded rice for higher yield and nitrogen use efficiency
| dc.contributor.author | Deepak Goyal | |
| dc.date.accessioned | 2017-04-12T07:23:52Z | |
| dc.date.available | 2017-04-12T07:23:52Z | |
| dc.date.issued | 2012 | |
| dc.description.abstract | This investigation was carried out to find out the management of nitrogen in dry direct seeded rice (D-DSR) for higher yield and nitrogen use efficiency under field conditions. The experiment consisted of fifteen treatment combinations comprised of three N rates (120, 150, 180 kg N ha-1), four schedules of three rates of N application, two LCC treatments (LCC-3 and LCC-4) and zero - N control. The schedules of N application comprised of N application in three equal split doses applying first dose at basal or 14 DAS (0, 35, 63 and 14, 35, 63 DAS) and application of N in equal four split doses applying first dose at basal or 14 DAS (0, 28, 49, 70 and 14, 28, 49, 70 DAS). It is inferred that 120 kg N ha-1 when applied in three split doses was sufficient to produce optimum grain yield of dry direct seeded rice as further application of 150 or 180 kg N ha-1 did not increase the grain yield significantly. Among the different schedules of N application, three split doses were found to produce significantly higher grain yield than four split doses, at all the N levels. The higher grain yield in three split doses was accompanied by higher N uptake in grain, total N uptake, effective tillers and N translocation efficiency than N applied in four split doses. Harvest index, nitrogen harvest index and translocated N were found to be maximum at 120 kg N ha-1 when applied in three split doses applying first dose at 14 DAS. Agronomic efficiency, physiological efficiency and recovery efficiency were also highest at 120 kg N ha-1when applied in three split doses applying first dose at 14 DAS. Keywords: Agronomic efficiency, Dry direct seeded rice, Grain yield, Nitrogen rates, Physiological efficiency, Recovery efficiency, Schedules of N application. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810007179 | |
| dc.keywords | Keywords: Agronomic efficiency, Dry direct seeded rice, Grain yield, Nitrogen rates, Physiological efficiency, Recovery efficiency, Schedules of N application. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Punjab Agricultural University, Ludhiana | en_US |
| dc.sub | Soil Science | en_US |
| dc.theme | Chemistry | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Management of nitrogen in dry direct seeded rice for higher yield and nitrogen use efficiency | en_US |
| dc.type | Thesis | en_US |