تأثير السماد البوتاسي في نمو و حاصل صنفين من القطن

الملخص EN

A field experiment was conducted at the 1PA Field Crops Research Station, Abu - Graib during 2002 season and at Experimental Farm, Department of Field Crops Science, College of Agriculture , Abu-Graib during 2004 season.

The objective was to study the effect of potassium levels on the growth and yield of two cotton cultivars.

The layout of the experiment was a split — plot in RCBD with three replications.

Cultivars (Cocker 310 and Lachata) were the main plots while the fertilizer levels (K0 , K60, K120 and K180) Kg K/ha were the sub plots.

The results showed that Cocker 310 was superior in plant height, number of sympodial, boll weigh and number of seeds/boll, while Lachata cultWar produced higher seed cotton yield per ha due to producing higher number of open bolls.

Application of potassium fertilizer caused a significant increase in plant height, number of sympodial, boll weight, number of open bolls and seed cotton yield while there were no significant differences in number of seed/boll in both years.

There was a significant interaction between cultivars and potassium level on all characters except seeds/holL The Lachata cv.

using 180 Kg/ha K produced highest cotton yield 3972.81 and 4287.39 Kg/ha during the 2002 and 2004 seasons respectively.