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\hypersetup{pdftitle={Effects of Plant Growth Promoting Rhizobacteria (PGPR) on Yield and Some Soil Properties in Corn (\textit{Zea Mays} L.)  },pdfauthor={Khaled Eidizadeh, Farshad Abrahimpour},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Biofertiliser, corn, grain yield, sustainable agriculture. },pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
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\Large{\textbf{Effects of Plant Growth Promoting Rhizobacteria (PGPR) on Yield and Some Soil Properties in Corn (\textit{Zea Mays} L.)  \footnote{\textbf{Contact Address:} Khaled Eidizadeh, Shahid Beheshti University (G.C.), Department of Agroecology, Tehran, Iran, Velenjak, Tehran, Iran, \mbox{e-mail}: \email{avena_aveng@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Khaled Eidizadeh$^{1}$, Farshad Abrahimpour$^{2}$}}
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\begin{itemize*}
\item[]{\small{\textit{$^{1}$Shahid Beheshti University (G.C.), Department of Agroecology, Tehran, Iran, Iran}}}
\item[]{\small{\textit{$^{2}$Payam-e-noor University, Department of Agriculture, Tehran, Iran, }}}
\end{itemize*}
\index[author]{Eidizadeh, Khaled}
\index[author]{Abrahimpour, Farshad}
\begin{center}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
In order to study the effects of integrated application of biofertiliser (Azosprillum spp. (N$_{2}$-fixing) and Bacillus coagulans (Phosphate solubilising) and chemical fertilisers (200 and \unitfrac[100]{Kg}{ha} N and P, respectively) on the yield and yield components of corn, an experiment was conducted in 2008 in Shushtar city (Khuzestantan Province, Southwestern of Iran) in a factorial arrangement with completely randomised block design with three replicates. Treatments were integrated application of biological and chemical fertilisers in four levels (\mbox{100\,\%} chemical fertiliser, \mbox{50\,\%} chemical fertiliser+ biofertiliser, \mbox{25\,\%} chemical fertiliser+ biofertiliser and biofertiliser) and biofertiliser application method in three levels (seed inoculation, fertigation, seed inoculation+ fertigation). The highest and lowest grain yield was obtained by application of \mbox{50\,\%} chemical fertiliser+ biofertiliser (\unitfrac[11.8]{t}{ha}) and biofertiliser (\unitfrac[6]{t}{ha}), respectively. The greatest and lowest harvest indices were recorded in chemical (0.59) and biofertiliser (0.47) treatments, respectively. Number of grain per row and row in ear had not significant differences in integrated and chemical treatments. Methods of biofertiliser application had not significant effect on maize yield and yield components. Results soil analysis showed that biofertilisers increased P, K as well as other micro elements availability rather N fixation. Results revealed although replacing chemical fertilisers by biofertilisers reduced maize growth, but integrated application of these sources produced highest grain yield, nitration elements availability and reduced substantially consumption of chemical fertiliser. Results also indicated that non"=chemical sources of crop nutrition can be considered as a reliable alternative for chemical fertilisation in ecological production of crops in agro"=ecosystems of Iran.







}

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\noindent \textbf{Keywords:} Biofertiliser, corn, grain yield, sustainable agriculture. 
\index[key]{Biofertilizer}
\index[key]{Corn}
\index[key]{Grain yield}
\index[key]{Sustainable!agriculture. }
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