Effect of Rate and Time of Nitrogen Application on Yield, Yield Components, and Oil Content of Sesame in Jiroft Area

Document Type : Research Paper

Authors

1 M. Sc. Of soil science, soil and water research department, Kerman Agricultural Natural resources research and education center, AREEO, Kerman, Iran

2 Researcher, Soil and Water research institute, AREEO, Karaj, Iran

3 Assistant professor, Soil and Water research institute, AREEO, Karaj, Iran

Abstract

Due to the importance of sesame as an oil crop, in order to investigate the effects of different levels and application time of nitrogen (N) on quantitative and qualitative yield of this crop, an experiment was conducted in two successive years from July 2009, on JL-13 variety in Jiroft. Experimental design was factorial with Completely Randomized Block Design (CRBD) with three replications. Treatments were 5 levels of nitrogen (0, 25, 50, 75, 100 kg N ha-1) as urea and split application of N (two splits: before planting and before flowering; and 3 splits: before planting+ before flowering + before seed pods).  Every plot contained four planting rows (five meters length). Spacing between two rows and plants were 50 and 10 cm, respectively. Two central rows were cut for yield and yield components determination. N absorption and nitrogen agronomic efficiency were also measured.  Results showed that the effect of N splitting on yield, yield components, and oil content of sesame was not significant. Nitrogen application increased seed yield, yield component, and N agronomic efficiency significantly. Application of  75 kg N ha-1  resulted in the highest seed  and oil yield, i.e. 1137 and 602 kg ha-1,  respectively. Thus, under the condition of this experiment, application of 75 kg N ha-1 in two splits is recommendable.

Keywords

References

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Iranian Journal of Soil Research
Volume 31, Issue 2
August 2017
Pages 167-176

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