Ecophysiological effects of barnyardgras (Echinochloa crus galli) on rice CV. Shiroudi.
Echinochloa oryzicola ((Ard) Fisher) invasive species of barnyard grass in paddy rice country and mimicking properties. The competitive effects of invasive species, barnyard grass and evaluation damage in rice fields, rice experiment station research Tonekabon city was using the figure Shiroudi in 1390. The experimental design used randomized complete block design with three replications and 10 were treated. In this study, two treatment groups was based on the number of days from sowing to transplanting. The first group includes interaction treatments in the weeds until the specified intervals after transplantation (12, 24, 36, 48 days) was weeding weeds were present after the end of the season Plots were kept free of weeds, in the control group, treated with all-season interaction (all-season weed competition with rice), respectively. The second group includes treatments that eliminate or control the weeds until the time of transfer to each of these sets were weeding and After the end of the season, weeds were allowed to compete with the rice. Different traits studied included grain yield, plant height, flag leaf length tiller panicle length, grain filling, emptying and total seed weight, stem weight, biological yield and harvest index. Statistical analysis showed a significant decrease in rice and barnyard grass tillers, plant height, flag leaf area and yield level of 5 percent and 1 percent was possible.