Australian Journal of Crop Science, ( ISI ), Volume (4), No (5), Year (2010-1) , Pages (363-368)

Title : ( Nitrogen Use Efficiency of Wheat as Affected by Preceding Crop, Application Rate of Nitrogen )

Authors: Majid Rahimizadeh , Ali Kashani , Ahmad Zare-Feizabadi , Alireza Koocheki , Mehdi Nassiri Mahallati ,

Citation: BibTeX | EndNote

This study was carried out under temperate climate condition of Khorasan province, Iran, during 2006-2008 growing seasons to determine the suitable crop rotation for enhancing nitrogen use efficiency of wheat. A three-factor experiment was laid out as splitsplit plot arrangement (RCBD) with three replications. Main plots were five preceding crops for wheat practices viz. wheat, potato, silage corn, clover and sugar beet. Sub plots were N fertilizer rates in preceding crop including no N (control), 50% lower than recommended N rate, recommended N rate and 50% more than recommended rate. The sub-sub plots were preceding crop residue return including no residue return (control) and 50% return. Results showed that nitrogen use efficiency (NUE), nitrogen uptake efficiency (NUpE), nitrogen utilization efficiency (NUtE), nitrogen harvest index (NHI) and grain protein content (GPC) in wheat were significantly affected by preceding crop. Fertilizer N rate applied on preceding crops, significantly influenced NUE, NUpE and grain protein content of wheat. NUE, NUpE, NUtE and NHI of wheat grown after potato recorded the highest values. While, the lowest NUE indices and grain protein content of wheat were found for wheat-wheat rotation. The higher NUE of wheat in the potatowheat rotation was due to the higher NUpE in this rotation. NUE and NUpE in all crop rotations reduced with increasing N fertilizer rate. Return of crop residue had no significant effect on NUE indices expect NHI.

Keywords

crop rotation; crop residues; fertilizer; N indicators; nitrogen uptake
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1017117,
author = {Majid Rahimizadeh and Ali Kashani and Ahmad Zare-Feizabadi and Koocheki, Alireza and Nassiri Mahallati, Mehdi},
title = {Nitrogen Use Efficiency of Wheat as Affected by Preceding Crop, Application Rate of Nitrogen},
journal = {Australian Journal of Crop Science},
year = {2010},
volume = {4},
number = {5},
month = {January},
issn = {1835-2693},
pages = {363--368},
numpages = {5},
keywords = {crop rotation; crop residues; fertilizer; N indicators; nitrogen uptake efficiency},
}

[Download]

%0 Journal Article
%T Nitrogen Use Efficiency of Wheat as Affected by Preceding Crop, Application Rate of Nitrogen
%A Majid Rahimizadeh
%A Ali Kashani
%A Ahmad Zare-Feizabadi
%A Koocheki, Alireza
%A Nassiri Mahallati, Mehdi
%J Australian Journal of Crop Science
%@ 1835-2693
%D 2010

[Download]