Investigation of intercropping corn and cucumbers and its effects on weed control

In order to investigate the effect of intercropping corn and cucumber on weeds, a research project was carried out in a controlled field at Payame Noor University in Marivan (Kurdistan province) in 2013.The main plots consisted of two treatments (weeding and control) and sub-treatments including six treatments, i.e. 100% corn, 100% cucumber, 100% corn 100% cucumber, 50% cucumber 100% corn, 50% corn 100% cucumber and 50% corn 50% cucumber. After the preparation of the land in accordance with the patterns of different combinations of cultivation, was taken at the appropriate time.In weeding treatments, weeds were mechanically removed from the designated plots. In the time of harvesting of corn and cucumber, the land equity ratio (LER), photosynthetic active radiation (PAR) and dry biomass were measured. After corn harvesting, grain yield, biological yield and harvest index were calculated.The results showed that the effect of different planting treatments on grain yield was not significant. The effect of different weeding treatments and different planting combinations on corn and cucumber LER was not significant.On the other hand, the effect of weeding and different planting combinations on dry weight of weeds was significant.The highest dry weight of weeds was obtained in no weeding and 100% cucumber treatments, and the lowest dry weight of weeds was related to 100% cucumber, 100% corn and hand-weeding treatment.In general, PAR was the lowest for pure crop (corn), and the highest PAR was for mixed crops (corn and cucumber).