determination of the best suitable planting pattern and plant density of early maturing cotton cultivars following canola harvesting

in order to investigation of planting pattern and plant density effects on vegetative and reproductive organs and yield of early maturing cotton cultivars, an experiment was carried out as split–split plot using randomized complete block design with 4 replications, in karkandeh research station, during 2004-2205. three row spaces (60, 70 and 80 cm) were consisted as main factors, plant space in the row of 10 and 20 cm as sub-factors and three early maturing cotton cultivars (mutagenesis, b-557 and 43259) as sub-sub-factors. the results showed that with decreasing the row spaces from 80 to 60 cm, the average of the boll numbers per plant and single boll weight were decreased, but yield was increased from 2270 to 5656 kg ha-1 by increase in plant number in hectare. with decreasing plant distance from 20 to 10 cm, also, the plant height, monopodia length, sympodia length, sympodia number and boll number per plant were decreased. the best pattern for mutagenesis cultivar was observed in planting pattern of 60×10 cm and density of 167000 plants per hectare. but the increasing of plant population had less effect on 43259 and b-557 cultivars.