تاثير كاربرد باكتري هاي افزاينده رشد گياه (PGPR) بر تسهيم ماده خشك و برخي ويژگي هاي رشد ذرت در شرايط گلخانه

Effects of PGPR Application on Dry Matter Partitioning and Some Growth Characteristics of Maize(Zea mays L.) Hybrids under Greenhouse Conditions

Application of Plant Growth Promoting Rhizobacteria(PGPR) as biofertilizers play an important role in sustainable crop production management and yield. In this study effect of Azotobacter chroococcum, Azospirillum lipoferum, Azospirillum brasilense and Pseudomonas fluorescens inoculants on late maturity Maize (Zea mays L.) single cross hybrids (SC700,SC 704 and a promising single cross, B73*K18) were utilized. Some morphological traits, dry matter partitioning and some of the root characteristics were recorded under greenhouse conditions. Hybrids seed were treated single inoculation by each bacterium and coinoculation by two and three bacteria inoculums combination and uninoculation treatment as control. Also plant and ear height, stem diameter, plant and above ear leaf number, leaves, stem, tassel and plant dry matter, root surface, volume, length, dry matter and above ground dry matter/root dry matter were determined. Results revealed that except for total number of leaves and above ear leaf number, other studied traits affected by experiment treatments and those interactions of hybrids and the inoculants. Likewise, there were significant interaction revealed that respectively SC704, B73*K18 and SC700 and PGPR. Thus, three bacteria combination have highest growth promoting effect and Azotobacter chroococcum and Pseudomonas fluorescens and seed single inoculation Azotobacter chroococcum and Pseudomonas fluorescens inoculants have the most growth promoting effect respectively.