COMPARED THE BEHAVIOR OF FLOWERING AND FRUITING OF SOME COTTON VARIETIES AND RELATION TO PLANT DENSITY

Abstract

Afield experiment was conducted in experimental field ,Department of field Crop-College of Agriculture /University of Baghdad during summer seasons 2014.In order to study the flowering and fruiting behaviour of five varieties of cotton as effected by plant spacings . The study included two factors, the first one was the varieties (Coker 310 , Marsum 1, Lashata , Ashur and Abu Ghraibe 5 ) as whole plots , The second factor was spacing (20 , 25 and 30 ) cm as sub plots. Using complete randomized block design under split plots with four replications. The results of the study showed significant different between the varieties in most characteristic studied, Coker 310 gave highest average for seed cotton yield 1457.00 due to gave highest average in number of total bolls and number of open bolls (22.27 and 8.93) boll plant-1 respectively, And gave least shedding percentage 33.30% , Earliness percentage 59.54% , Days to opening of first boll 117.7 Ashur var. gave lowest average for seed cotton yield 1120.32 kg ha-1, Earliness percentage 51.37 % ,Days to opening of first boll 115.27 ,. The Abu –Ghraibs var. gave best average after Coker 310 var. for all characterize comparison with the other varieties. It was superior of seed cotton yield 1308.44 kg ha-1 Earliness 57.85%, Days to opening of first boll 117.4.The Varieties plants on 20 cm distance between hill plant was significantly superior in the average boll weight 3.63 gm ,seed cotton yield 1364.85 kg ha-1.While The varieties plants on 30 cm distance was significantly superior in, Sympodial number15.21 branch plant-1, Days to first square, first flower and days to opening of first boll 44.04 , 67.75, 120.49respectively, bolls total number and open boll number 25.08 ,8.99 boll plant-1, and shedding percentage35.15 %.