Document Type : Research Paper

Authors

1 Head of Zabol University Staff Welfare Department

2 Department of Agronomy, Faculty of Agriculture, University of Zabol, Zabol, Iran

3 Department crop, univer sity of zabool

4 Departement crop, univer sity of zabool

Abstract

In order to investigate the effect of tillage systems and the combination of chemical fertilizer and livestock manure on some characteristics of sunflower, an experiment was conducted as split plots in a randomized complete block design with three replications at the research farm of Zabol University in 2019. The main factor was tillage levels (1-reversible plow and disc, 2-sweep and disc, and 3-disc). The sub-factor included fertilizer levels (no fertilizer application, 100 kg/ha of diammonium phosphate, 25 tons/ha of livestock manure + 100 kg/ha of diamonium phosphate, 50 tons/ha of livestock manure + 100 kg/ha of diamonium phosphate, 25 tons/ha of livestock manure, 50 tons/ha of livestock manure). The results showed that the highest values were obtained from the 50 tons/ha of livestock manure in tillage with disk for grain yield (5072 kg/ha), and oil percentage (44.44 percent), 50 tons/ha of livestock manure in tillage with disc for oleic acid content (51.61 percent), and 50 tons/ha of livestock manure for linoleic acid content (31.1 percent). The highest amount of chlorophyll a, b and carotenoids (1.253, 0.45 and 1.04 mg/g, respectively) was obtained from the application of 100 kg/ha of diamonium phosphate in tillage with disc. In general, in order to increase and improve the quantitative and qualitative characteristics of sunflower, the application of 50 tons/ha of livestock manure was suitable in disc tillage conditions.

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