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Influence of Zeolite Application on Nitrogen Efficiency and Loss in Canola Production under Sandy Soils Conditions

Gholamhoseini, Majid, AghaAlikhani, Majid, Malakouti, Mohammad Jafar, Joghan, Aydin Khodaei
Communications in soil science and plant analysis 2012 v.43 no.9 pp. 1247-1262
canola, field experimentation, growing season, leaching, nitrogen, sandy soils, seed yield, semiarid zones, zeolites
A field experiment was carried out in a semi-arid region of Iran during the 2006–2007 growing season to investigate canola seed yield as affected by nitrogen (N) and natural zeolite (Z) rates. This experiment studied N efficiency and N leaching loss in a sandy soil. Experimental treatments consisted of a factorial combination of three N levels (90, 180, and 270 kg N ha⁻¹) and four zeolite rates (0, 3, 6, and 9 t zeolite ha⁻¹). The result showed that the greatest seed yield (2452.3 kg ha⁻¹) was obtained from the N₂₇₀Z₉ treatment whereas the control treatment (N₀Z₀) produced the lowest seed yield (1038.3 kg ha⁻¹). Moreover, use of 270 kg N ha⁻¹ without zeolite (N₂₇₀Z₀) led to the greatest amount of N leaching loss (144.23 kg ha⁻¹). Zeolite application clearly reduced N leaching loss in all N rates. This justified low N-use efficiency in high N applications. More N uptake and more canola seed yield is attributed to zeolite application.