Response of sunflower (Helianthus annuus L.) to sulphur and seasonal variations

Fayyaz-ul-Hassan; Hakim, S.A.; Manaf, A.; Qadir, G.; Ahmad, S.

Response of sunflower (Helianthus annuus L.) to sulphur and seasonal variations

2007

Fayyaz-ul-Hassan (University of Arid Agriculture, Rawalpindi (Pakistan)) | Hakim, S.A. (University of Arid Agriculture, Rawalpindi (Pakistan)) | Manaf, A. (University of Arid Agriculture, Rawalpindi (Pakistan)) | Qadir, G. (University of Arid Agriculture, Rawalpindi (Pakistan)) | Ahmad, S. (Soil Fertility and Water Testing Lab., Rawalpindi (Pakistan))

Field experiments were conducted during spring and autumn to evaluate the effects of sulphur and seasonal variation on sunflower. Four sunflower hybrids (SAL-105, Mehran-II, G-101 & Parsun-II) and four sulphur levels (0, 10, 15 & 20 kg ha-1) were arranged in a randomized complete block design with four replications. Amongst hybrids, SAL-105 produced the highest achene yield during both the seasons. Yield and yield attributes were significantly affected by sulphur levels and seasons. Overall performance of spring crop was found to be better than that of autumn crop. Sulphur (20 kg ha-1) affected yield and yield attributes positively as compared to rest of the treatments. Sulphur levels and hybrids exhibited significant differences for oil content during both the seasons. Interactive effects of sulphur and hybrids on achene yield were found to be significant.

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