بررسی اثر دوره های تداخل علفهای هرز با پنبه بر عملکرد و اجزاء عملکرد پنبه

To investigate the effect of interference of weeds on yield and yield components of cotton experiment in a randomized complete block design with 6 replications was conducted at the research farm cheery paradise . The effects of six treatments over the course of interaction , including both control of weeds and other weed -free period of 30 four treatments interference , and the 120 -day on yield and yield components of cotton in the 60.90 cropping tested ninety-one SAS software was used and the results based on the analysis and Duncan test were analyzed . It was determined during the overlapping period of six had a significant effect on cotton yield and production performance Vajza’ cotton , fabric weight and seed weight and biological yield per hectare was affected . Correlation coefficients also showed a negative correlation with harvest index, seed cotton per hectare with other factors, was measured . Comparison showed that 30 days of weed interference with cotton reduced 5/28 percent yield . The results showed that weeds can not fight until 3/57 % will reduce cotton yield per hectare .