Pak. J. Bot., 48(5): 1933-1944, 2016.

GENOTYPE-BY-SOWING DATE INTERACTION EFFECTS ON COTTON YIELD AND QUALITY IN IRRIGATED CONDITION OF DERA ISMAIL KHAN, PAKISTAN

KHALID USMAN^1*, AYATULLAH², NIAMATULLAH KHAN³ AND SOHRAB KHAN¹

¹Department of Agronomy, Faculty of Agriculture, Gomal University, Dera Ismail Khan, Pakistan

²Department of Agriculture Extension Education& Communication, Faculty of Rural Social Sciences,

The University of Agriculture, Peshawar, Pakistan

³Cotton Research Station, Dera Ismail Khan, Pakistan

^*Corresponding author’s e-mail: drusmangu@gmail.com; Tel.: +92 966750087, Fax: +92 966750255

Abstract

Cotton is a major export commodity of Pakistan. It is affected by variable environmental conditions throughout the country which limits its production. A 2-year field study was conducted in 2012 and 2013 at Cotton Research Station, Dera Ismail Khan, Pakistan to evaluate the effects of six sowing dates on yield and quality attributes of four cotton genotypes. The experiments were laid out in split-plot within a randomized complete block design with three replications. Main plots treatments were six sowing dates, namely March 20, April 4, April 19, May 4, May 19, and June 3 while subplots treatments were four approved transgenic varieties of cotton (CIM-598, CIM-599, CIM-602, and Ali Akber-703). Results revealed that earlier planting produced more vegetative growth rather than lint yield while late planting induced flowering and boll formation when temperature was much cold that adversely affected cotton yield and quality. The results further indicate that the genotype CIM-599 scored first rank in number of bolls plant^-1, boll weight, seed cotton yield, ginning out turn, fiber length, fiber strength, fiber fineness, and fiber uniformity when sown on April 19. CIM-598 was the next suitable genotype after CIM-599 which produced higher yield and quality traits in April 19 sowing. Earlier and later sowing than April 19 resulted in lower cotton yield and quality characters due to unfavorable environmental conditions and shorter growth period, respectively. Thus it is concluded that the genotype, CIM-599 sown on April 19 suits well to the study area and had the potential to optimize cotton yield and quality in irrigated condition of Dera Ismail Khan, Pakistan.

Key words: Cotton, Genotype, Sowing date, Yield and quality.

Back to Contents	Pak. J. Bot., 48(5): 1933-1944, 2016.	FREE FULL TEXT PDF	Back to Contents
			Updated: 01-01-06
	GENOTYPE-BY-SOWING DATE INTERACTION EFFECTS ON COTTON YIELD AND QUALITY IN IRRIGATED CONDITION OF DERA ISMAIL KHAN, PAKISTAN *KHALID USMAN^1, AYATULLAH², NIAMATULLAH KHAN³ AND SOHRAB KHAN¹** ¹Department of Agronomy, Faculty of Agriculture, Gomal University, Dera Ismail Khan, Pakistan ²Department of Agriculture Extension Education& Communication, Faculty of Rural Social Sciences, The University of Agriculture, Peshawar, Pakistan ³Cotton Research Station, Dera Ismail Khan, Pakistan ^Corresponding author’s e-mail: drusmangu@gmail.com; Tel.: +92 966750087, Fax: +92 966750255* Abstract Cotton is a major export commodity of Pakistan. It is affected by variable environmental conditions throughout the country which limits its production. A 2-year field study was conducted in 2012 and 2013 at Cotton Research Station, Dera Ismail Khan, Pakistan to evaluate the effects of six sowing dates on yield and quality attributes of four cotton genotypes. The experiments were laid out in split-plot within a randomized complete block design with three replications. Main plots treatments were six sowing dates, namely March 20, April 4, April 19, May 4, May 19, and June 3 while subplots treatments were four approved transgenic varieties of cotton (CIM-598, CIM-599, CIM-602, and Ali Akber-703). Results revealed that earlier planting produced more vegetative growth rather than lint yield while late planting induced flowering and boll formation when temperature was much cold that adversely affected cotton yield and quality. The results further indicate that the genotype CIM-599 scored first rank in number of bolls plant^-1, boll weight, seed cotton yield, ginning out turn, fiber length, fiber strength, fiber fineness, and fiber uniformity when sown on April 19. CIM-598 was the next suitable genotype after CIM-599 which produced higher yield and quality traits in April 19 sowing. Earlier and later sowing than April 19 resulted in lower cotton yield and quality characters due to unfavorable environmental conditions and shorter growth period, respectively. Thus it is concluded that the genotype, CIM-599 sown on April 19 suits well to the study area and had the potential to optimize cotton yield and quality in irrigated condition of Dera Ismail Khan, Pakistan. Key words: Cotton, Genotype, Sowing date, Yield and quality.

Back to Contents