Investigating of some quantitative and physiological characteristics in rosemary as affected by biological and chemical fertilizers at different cuts

In order to evaluate the effects of biological and chemical fertilizers at different cuts on some properties of the Rosemary, an experiment was carried out as split plot based on Randomized Completely Block Design (RCBD) with three replications, at the Zabol University research farm. Three times cuttings were: Autumn’s first cut (late autumn), spring’s first cut (late spring) and autumn’s second cut (six months after autumn’s first cut) was considered as a major factor. The biological fertilizers included Aztobarvar, Phosphate Barvar-2, Petabarvar and chemical fertilizer NPK and the control was considered as a subplot factor. The maximum amount of phosphor (7352 mg.kg-1) was obtained from application of Phosphate Barvar-2. Additionally, the maximum amount of potassium (5542 mg.kg-1) and the minimum of sodium (4760 mg.kg-1) was obtained from Petabarvar. Protein, dry matter yield and oil yield, oil percentage, chlorophyll a, b, total chlorophyll significantly increased under the interactions of spring’s first cut and Aztobarvar biologic fertilizer by 28/36 mg.liter-1, (3294 and 53/90 kg.ha-1) 1/63, 6/66, 1/94 and 81/4 mg.gr-1 respectivly.The results also indicated that the interaction of spring’s first cut and Petabarvar biologic fertilizer had the highest essential oil yield (41.46 kg.ha-1) and interaction of autumn’s second cut and Aztobarvar biologic fertilizer produced the highest amount of nitrogen (12955 ppm) in shoot. The result showed that, the application of Aztobarvar biologic fertilizer in spring’s first cut improved and enhanced the quantitative and physiological characteristics of Rosemary, this would probably have been due to facilitating nitrogen uptake and optimal environmental conditions.