Effect of integrated application of chemical and biological fertilizers on phosphorus use efficiency and the agronomic characteristics of sunflower
Subject Areas : Journal of Plant Ecophysiology
M. Mirzakhani
1
(گروه زراعت و اصلاح نباتات، واحد فراهان، دانشگاه آزاد اسلامی، فراهان، ایران)
N. Sajedi
2
(گروه زراعت و اصلاح نباتات، واحد اراک، دانشگاه آزاد اسلامی، اراک، ایران)
Keywords: Biological yield, hectoliter weight, Nitroxin, Productivity index,
Abstract :
In order to the effect of integrated use of chemical and biological fertilizers on phosphorus use efficiency and some of agronomic characteristics in sunflower, this study was carried out in Markazi province in 2009. A factorial arrangement of treatment in a randomized complete block design with three replications was used. Inoculation with Nitroxin (N0= Control, N1= Inoculation), Inoculation with Barvar-2 (B0= Control, B1= Inoculation) and Application of chemical manure combination of Nitrogen and Phosphorus (C0= N0 + P0, C1= N50 + P25 , C2= N100 + P50 , C3= N150 + P75 kg ha-1). Results indicated that the effect of nitroxin on number of grain per m-2, hectoliter weight and inoculation with Barvar-2 biological manure on number of grain per m-2 were significant. Chemical manure combination of nitrogen and phosphorus on charecteritics such as: stem height, number of effective leaf, number of grain per m-2, biological yield, productivity index of plant, hectoliter weight and phosphorus use efficiency was significant, too. Among the different levels of combination application of chemical manure, that (50 kg ha-1 nitrogen + 25 kg ha-1 phosphorus) with average of phosphorus use efficiency (51.32 %) and (150 kg ha-1 nitrogen + 75 kg ha-1 phosphorus) treatment, with average of phosphorus use efficiency (21.01 %) were significantly superior to the other treatments. Therefore, it can be concluded that with increasing amounts of chemical fertilizers through leaching and waste to reduced fertilizer use efficiency