A field experiment was carried out at Annamalai University Experimental farm, Annamalai nagar, during Kuruvai and Navarai in the year 2008-09. To study the timing and graded levels of nitrogen and potassium in rice crop under SRI (System of rice intensification) cultivation. The experiment was laid out on deep clay soil by adopting randomized block design with factorial technique (FRBD). The results of field experiment revealed that the maximum growth and yield attributes were recorded in the treatment which received P2O5 as fully basal dose and nitrogen as three split doses viz., 50% basal and 25% each at tillering and panicle initiation stages. Potassium was applied as 33.3% K2O each at 15, 30 and 45 DAT. This treatment significantly recorded higher grain yield of 6278.7 kg ha-1 in field experiment – I and 6577.9 kg ha-1 in field experiment – II; and the straw yield of 7010.3 and 7309.7 kg ha-1 in field experiment I and II respectively. The shoot and grain uptake of nutrients (N, P and K) were high during 15, 30 and 45 DAT and at harvest which received 33.3 % K2O each at 15, 30 and 45 DAT.
Graded levels, Nutrient uptake, Nitrogen, Potassium, SRI
Arivazhagan, K. (1999). Nitrogen and Potassium interaction in rice. Ph.D. Thesis Dissertation submitted to Faculty of agriculture, Annamalai Univ., Annamalainagar, Chidmbaram.
Arivazhagan, K. and Ravichandran M., (2005). Interaction of nitrogen and potassium on yield and yield attributes in rice Cv. IR 20.Ad. Plant Sci., 18: 425-427.
Cassman, K.G.A. Doberman and D.T. Walter. (2002). Agroecosystems, nitrogen-use efficiency, and nitrogen management. AMBIO: A Journal of the Human Environment, 31, 6497-6517.
Awan, T.H.; Z. Manzoor; M.E. Safdar and M. Ahmad. (2007). Yield response of rice to dynamic use of potassium in traditional rice growing area of Punjab. Pakistan J. Agri. Sci.., 44 (1): 130-135.
FAO (2003). htt://fao.org/English/df/2003/IYR110. htm accessed on 3/25/2006.
IASRI / ICAR (2003). Agricultural research data book, Indian council of Agricultural Research, New Delhi.
Juanita, S. (2007). Effect of timing and levels of potassium in SRI cultivation. M.Sc. (Ag.). Thesis, submitted to Annamalai University, Chidmbaram.
Ju, X.T. Xing, G.X., Zang. S.L., Zhang. L.J., Liu., X.J. Cui, Z.I., Yin, B., Christie, P., Zhu, Z.L. Zhang, F.S. (2009). Redusing environmental risk by improving N management in intensive Chanese agricultural systems. Proc. Natl. Acad. Sci. USA. 106:3041-3046.
Majumdar, S.K. and Ghosh, D.C. (1980). Effect of split application of potash on yield of high yielding rice. (Pusa 2-21). Indian potash J., 5(3): 8-10.
Manzoor,Z. , T.H. Awan, M. Ahmad, M. Akhter and F.A. Faiz. (2008). Effect of split pplication of potash on yield and yield related traits of basmati rice. J. Anim. Pl. Sci. 18(4): 120-124
.Marschner, H. (1995). Mineral nutrition of higher plants. 2nd Ed. Academic Press, San Diego, New York.
Mengel, K. (2007). Potassium. In: Barker A.V., Pilbeam D.J., editors, Handbook of plant nutrition. Boca Raton (FL): CRC press. P. 91-121.
Mondal, S.S, Jayaram, D, Pradban, B.K. and Das, S.K. (1989). Rate, time and pattern of application of nitro-gen and potassium in influencing the yield components and yield of rice. J. Pot. Res., 5: 77- 81.
Radha Kumar, C. and Srinivasulu Reddy, D. (2009). Performance of Rice Under Crop Reside Incorporation and Different Nitrogen Management Practices. Madras Agric. J., 96(7-12): 365-369.
Raun, W.E., Solie, J.B., Johnson, G.V., Stone, M.L., Mullen, R.W., Freeman, K/W.,Thomason, W.E., Lukina, E.V., (2002). Improving nitrogen use efficiency in cereal grain production with optical sesing and variable rate application. Agron. J. 94, 815-820.
Ravichandran, M. and M.V. Iramach and Rasekharan (2011). Optimizing timing of potassium application in productivity enhancement of crops. Karnataka J. Agric. Sci.,24 (1) : (75-80).
Samrathlal, M., S. Surendra and Y.S. Shivay (2003). Response of hybrid rice (Oryza Sativa) to nitrogen and potassium application in sandy clay –loam soils. Indian J. of Agri. Sci. 73(1): 8-11.
Shanhan, J.F. Kitchen, N.R, Raun and W.R, Schepers J.S. (2008). Responsive in-season nitrogen management for cereals. Computers and Electronics in Agriculture, 61, 51-62.
Singh, S.P., Suppaiah, S.V. and Kumar, R.M. (2006). Response of rice Varieties to nitrogen application time under direct seeded puddle condition. Oryza, 43:157-158.
Stoop, N.A, Uphoff, N., Kassam, A. (2002). A review of agricultural research issues raised by the System of Rice Intensification (SRI) from Madagascar: Opportunities for improving farming system for resousce-poor farmers. Agric. Syst. 71: 249-274.
Stoop, W.A. (2003). The system of rice intensification (SRI) from Madagascar; myth or missed opportunity? Report on study visit to the “Hauts Plateaux” region of Madagascar (3-15 march 2003). Stoop. Consult, Direbergen- R., The Netherlands, 17 pp.
Uphoff, N, Fernandes, E, Yuan, L.P, Peng, J, Rafaralahy, S. and Rabenandrasana. J. (2002). Assessments of the system of rice intensification (SRI). Proc. Intern. Conf. Sanya, China, April 1-4.
Venkitasamy, R, Sridharan, C.S, Madhiyazhagan, R. and Prabhakaran, N.K. (1997). Split application of nitro-gen and potassium in MaR hybrid rice. Madras Agric. J, 84(1): 43-44.
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)