EFFECT OF POTASSIUM FERTILIZATION ON COTTON PRODUCTION UNDER EGYPTIAN SOIL CONDITIONS

Kafaga, E.E.E.; Saleh, Sh. Z.; Abd El-Shafy, Yosreia S.; Antoun, L.W.

doi:10.21608/jssae.2008.166825

	EFFECT OF POTASSIUM FERTILIZATION ON COTTON PRODUCTION UNDER EGYPTIAN SOIL CONDITIONS
Journal of Soil Sciences and Agricultural Engineering
Article 5, Volume 33, Issue 1, January 2008, Page 785-792 PDF (514.25 K)
Document Type: Original Article
DOI: 10.21608/jssae.2008.166825
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Authors
E.E.E. Kafaga¹; Sh. Z. Saleh¹; Yosreia S. Abd El-Shafy²; L.W. Antoun¹
¹Soil, Water and Environ. Res. Inst., Agric. Res. Center.
²Field crops Res. Ins., Agric. Res. Center.
Abstract
Four field experiments were carried out at El-Serw Agricultural Research Station of Damietta Governorate and Kafer El-Hamam Agricultural Research Station. Sharkia Governorate during 2004 and 2005 seasons to study the effect of two levels of potassium fertilizer (12.5 and 25kg K₂O fed.^-1) added as a soil application companied with one or two foliar spray of 2% soluble potassium sulphate (50% K₂O) (solupotasse) on cotton yield, yield component and quality of seeds. The results revealed that potassium treatments increased number of open bolls / plant, boll weight /gm, seed cotton yield (ton fed.^-1), lint percentage and a slight increase in oil percentage, but it had insignificant effect on seed index and protein percentage comparing to control treatment. The addition of 12.5 kg k₂O fed.^-1 after thinning as soil application + two foliar sprays, with 2% soluble potassium sulphate (solopotasse) at budding stage (45 days after sowing) and before flowering is considered to be a recommended amounts for cotton (3.29 ton fed.^-1) at El-Serw area, while addition of 25kg k₂O fed.^-1as a soil application + two sprays of 2% soluble potassium sulphate solopotasse at the above mentioned time was the recommended amounts in Kafer El-Hamam site. which yielded (3.34 ton fed.^-1).


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