نوع مقاله : مقاله پژوهشی
1 دانشجوی کارشناسی ارشد گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه بوعلی سینا، همدان
2 استادیار گروه زراعت و اصلاح نباتات دانشکده کشاورزی دانشگاه بوعلی سینا
عنوان مقاله [English]
In order to investigate the effect of application method of phosphate and zinc sulfate fertilizers on some physiological indices of a rhizobium inoculated bean cultivar (Phaseolus vulgaris, cv. Akhtar), a factorial experiment was conducted in a randomized complete block design with three replications in 2016 at Bu-Ali Sina University research farm. The factors were as follows: Nitrogen starter fertilizer with three levels (0, 30, 60 kgha-1) as the first factor, two methods of zinc sulfate application (broadcasting in soil and foliar application) as second factor, and two phosphate fertilizer application methods (broadcasting and banding placement in soil) as third factor. The maximums of leaf area index (5), total dry weight (1100 gm-2) and crop growth rate (24 gm-2day-1) were observed in the simultaneous application of banding placement phosphate and foliar zinc sulfate in terms of consumption of 30 kg nitrogen per hectare. Compared with the control (no- nitrogen, phosphate and zinc sulfate broadcasted in soil) the maximums of LAI, TDW and CGR were 43, 69 and 92 % higher respectively. In net assimilation rate (NAR) and relative growth rate (CGR), only the main effects of the studied factors were significant. Therefore, phosphate banding placement + foliar zinc sulfate beside 30 kg N ha-1 is the best recommended treatment in rhizobium-inoculated bean to maximize its physiological growth indices.