Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2008.1949.1952Jamaati-e-SomarinSh. TobehA. HassanzadehM. SaeidiM. GholizadehA. Zabihi-e-MahmoodabadR. 1220081115In order to investigate the plant density and nitrogen
level on nitrogen use efficiency components (agronomical, physiological,
apparent recovery and nitrogen use efficiency), the amount of nitrogen
uptake by plant, yield and yield components of potato (Solanum tuberosum
L.) Agria cultivars` tuber, a factorial experiment based on randomized
complete block design was conducted in Ardabil, Iran, in 2006 with three
replications. Factors were adjusted for the nitrogen level (0, 80, 160
and 200 kg ha-1 net nitrogen) and plant density (5.5, 7.5 and
11 plant m-2). Results showed that with increasing the nitrogen
levels and plant densities agronomical nitrogen use efficiency, physiological
nitrogen efficiency and nitrogen use efficiency were decreased and apparent
recovery nitrogen efficiency was increased. The most nitrogen uptake in
plant was observed at the 200 kg ha-1 net nitrogen. The most
yield and number of tuber per unit area were gained at the 80 and 160
kg ha-1 net nitrogen. Increasing the plant density resulted
in increasing in the tuber yield per unit area and the rate of nitrogen
up to the 160 kg ha-1 net nitrogen. So, application of the
80 kg ha-1 net nitrogen and plant density of 11 plant m-2
is recommended to get highest yield with the most nitrogen use efficiency.]]>Bussan, A.J., P.D. Mitchell, M.E. Copas and M.J. Drilias,20074724622472Arsenault, W.J. and J.A. Malone,199976227229Arsenault, W.J., D.A. LeBlanc, C. George, C. Tai and P. Boswall,200178301309Beraga, L. and K. Caeser,1990Solanum tuberesom L. cv. erntestolz) as influenced by different day length.]]>33257267Darwish, T.M., T.W. Atallah, S. Hajhasan and A. Haidar,20068595104Georgakis, D.N., D.I. Karafyllidis, N.I. Stavropoulos, E.X. Nianiou and I.A. Vezyroglou,1997462935942Haase, T., C. Schuler and J. Heb,2007Solanum tuberosum L.) for processing.]]>26187197Hartemink, A.E., M. Johnston, J.N. O’Sullivan and S. Poloma,200079271280Hashemidezfooli, A., A. Koochaki and M. Banayanavval, 19983rd Edn.,Karafyllidis, D.I., D.N. Georgakis, N.I. Stavropoulos, E.X. Nianiou and I.A. Vezyroglou,1997462943950Khajehpour, M.,20041st Edn.,Koochaki, A. and M.H.R. Mohassel,20019th Edn.,pp: 400pp: 400Marguerite, O., G. Jean-Pierre and L. Jean-Francois,200698496506Osaki, M., H. Ueda, T. Shinano, H. Matsui and T. Tadano,199541557566Jackson, S.D.,199911918