Effects of inoculation with azospirillum and phosphorus fertilizer on number of seeds per head, dry weight and thousand grain weight of safflower in lavaryab region (in iran)

摘要

Safflower is an oilseed crop native to Iran. There are various kinds of its wild types throughout Iran proving itswell adaptability to the climatic conditions of this country. It is characterized by its relative tolerance to soilsalinity and drought as well as its high-quality oil content. Phosphorus is a major component in ATP, themolecule that provides ”energy” to that plant for such processes as photosynthesis, protein synthesis, nutrienttranslocation, nutrient uptake and respiration. Azotobacter and azospirillum are free-living N2- fixing bacteriathat in the rhizospheric zone have the ability to synthesize and secret some biologically active substances thatenhance root growth. The experiment was conducted at the lavaryab zahedan (in iran) which is situated between29° North latitude and 60° East longitude and at an altitude of 1391m above Mean Sea Level. The fieldexperiment was laid out in randomized complete block design with factorial design with three replications.Analysis of variance showed that the effect of azospirllum on number of seeds per head, dry weight and thousandgrain weight was significant.