Comparing the agronomic reaction of nut and oil sunflowers in different phosphorus and zinc fertilizer condition
Subject Areas : Journal of plant ecophysiology
1 - Associate professor in crop physiology, Department of Agronomy and plant breeding, Arak Branch, Islamic Azad University, Arak,
Iran.
Keywords: Yield, Zinc, Sunflower, phosphorus, Oil seed, nut seed,
Abstract :
The act in response of oil and nut sunflowers type (Helianthus annus L. cv. Zaria oily and Ghalami nut type) to different basis and level of phosphorus and zinc fertilizer under field situation this trial was conduct at Agricultural Research Centre, Islamic Azad University Arak, Iran during 2011.Phosphorus levels were 350, 175, 175 kg/ha triple super phosphate plus 100g/ha phosphorus solubilising bacteria and pure PSB, Zinc levels were 0, 25 kg/ha soil application from zinc sulphate, 25 kg/ha in form of soil use zinc sulphate in addition soluble zinc 10% and soluble zinc 10% as solo foliar application. Result explains in oil type sunflower the peak grain yield was 2.52 t/ha by 100 g/ha phosphorus solubilising bacteria. It was for nut sunflower type 3.68 t/ha by support with 175 kg/ha superphosphate fertilizer plus 25 kg/ha zinc sulphate. Utilization of 175kg/ha superphosphate compound without zinc compound and also 350 kg/ha triple super phosphate plus 25kg/ha zinc sulphate were the same effects on head width of oil sunflower heads by 15.3 to 15.4 cm as greatest diameter of heads in oil sunflower kind. The least head size in oil sunflower type was 10.33 cm by use of 350 kg/ha triple super phosphate fertilizer in addition foliar application of soluble zinc 10% significantly. Stem thickness measurements affected by our treatments in both sunflower types and Means comparisons for LAI show that in oil sunflower type the highest LAI was obtain by pure PSB in non zinc application condition(4.09). In nut sunflower type also, the maximum LAI was estimated in 350 kg/ha triple super phosphate utilize plus foliar application of soluble zinc 10% plots (6.09)