International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 2
First page : (614) Last page : (623)
Article doi: : http://dx.doi.org/10.18782/2320-7051.6370

Effect of Site Specific Nitrogen Management Approaches on Content, Uptake and Use efficiency of Nitrogen in Rice under Different Systems of Establishment

Bhavya. M. R.¹, Dinesh Kumar*, M. ², Girijesh, G. K.³ and Nataraju, S. P.⁴

¹Ph.D Scholar, ²Professor and Division Head, Department of Agronomy,
³Professor, Department of Agronomy, ⁴Professor, Department of Crop Physiology
Department of Agronomy, College of Agriculture, UAHS, Shivamogga, Karnataka, India
*Corresponding Author E-mail: dinumallige@gmail.com
Received: 12.03.2018  |  Revised: 20.04.2018   |  Accepted: 25.04.2018  

 

 ABSTRACT

Nitrogen content of rice was significantly affected by successive stages of plant growth (Table 1). During early stages of growth it showed the highest content and with increase in age of plants decreased due to dilution effect resulting significant contribution towards higher dry matter production. The nitrogen uptake by plant however increased with the growth of the crop. At all growth stages, STCR approach recorded higher N content (2.909 per cent at 30 DAS/T, 0.688 and 1.139per cent at harvest in straw and grain respectively), uptake (around 15.82 kg ha-1 at 30DAS/T and at harvest it was 56.50 and 82.03 kg ha-1 in straw and grain, respectively),  Agronomic use efficiency (5.64 kg kg-1), Apparent N recovery efficiency(0.24 kg kg-1), grain and straw yield (7183 and 8314 kg ha-1) as compared to other nitrogen management approaches like RDF, STL and LCC. On the similar lines, Among systems of establishment, SRI recorded higher nitrogen content and uptake thereby recorded 56.11 and 49.26 per cent higher grain and straw yield over aerobic system (4975 and 5948 kg ha-1), whereas it was 8.24 and 9.54 per cent over conventional system (7219 and 8105 kg ha-1). The nature of response from varied level of N application indicate linear relationships with > 95 per cent dependency still the higher degree of relation like quadratic was found best fit as the data relayed still higher than relative to an extent of > 96 per cent for the study made in different years.

Key words: Content, Nitrogen, SSNM, STCR, Use efficiency, Uptake

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Bhavya, M.R., Kumar, M.D., Girijesh, G.K. and Nataraju, S.P., Effect of Site Specific Nitrogen Management Approaches on Content, Uptake and Use efficiency of Nitrogen in Rice under Different Systems of Establishment, Int. J. Pure App. Biosci.6(2): 614-623 (2018). doi: http://dx.doi.org/10.18782/2320-7051.6370