University of Tabriz Journal of Agricultural Science and Sustainable Production 2476-4310 23 4 2014 02 04 Evaluation the Influence of Biological Fertilizers on Grain Yield and Nitrogen Use Efficiency in Wheat (Tiriticum aestivum L.) Evaluation the Influence of Biological Fertilizers on Grain Yield and Nitrogen Use Efficiency in Wheat (Tiriticum aestivum L.) 141 157 788 FA Syma Ghalambaz Amir Aynehband 0000-0002-9144-455X Abdoll Amir Moezzi Journal Article 2012 11 05 Abstract In order to study the Influence of different nutrient management methods and weed densities in wheat a field experiment was conducted of Shahid Chamran University at 2010-2011. The experimental design was split-plot based on RCB with 3 replications. Main plot includes 5 nutrient management methods and sub-plot includes 3 weed densities. Our resuls showed that all grain yield components except 1000 grain weight were lower in 100% biological fertilizer than 100% chemical that meant. Grain yield and protein were reduced by increasing in weed density. Both anthesis and maturity stage, integrated methods had a better nitrogen efficiency. Than both 100% chemical or biological methods, but‌, nitrogen reliance index (NRI) was reduced by increasing. In nitrogen, in conclusions, we founded that absolute elimination of chemical nitrogen fertilizer will not suitable due to negative effect on both yield quietly a quality. Therefore in both agronomical and ecological point of view integrated methods induced better situation in wheat agro ecosystems due to reducing chemical nitrogen fertilizer.     Abstract In order to study the Influence of different nutrient management methods and weed densities in wheat a field experiment was conducted of Shahid Chamran University at 2010-2011. The experimental design was split-plot based on RCB with 3 replications. Main plot includes 5 nutrient management methods and sub-plot includes 3 weed densities. Our resuls showed that all grain yield components except 1000 grain weight were lower in 100% biological fertilizer than 100% chemical that meant. Grain yield and protein were reduced by increasing in weed density. Both anthesis and maturity stage, integrated methods had a better nitrogen efficiency. Than both 100% chemical or biological methods, but‌, nitrogen reliance index (NRI) was reduced by increasing. In nitrogen, in conclusions, we founded that absolute elimination of chemical nitrogen fertilizer will not suitable due to negative effect on both yield quietly a quality. Therefore in both agronomical and ecological point of view integrated methods induced better situation in wheat agro ecosystems due to reducing chemical nitrogen fertilizer.     https://sustainagriculture.tabrizu.ac.ir/article_788_bb31432c57fada72b563136b6fa09b76.pdf