The Effect of Chemical Control in Direct and Submerged Cultivation of Rice (Tarem Hashemi) on Weeds

In order to investigate the effect of some herbicides with different doses in direct cultivation and comparing it with transplanted cultivation, an experiment was carried out in the form of split plots based on random complete blocks in three replications in Mazandaran in the spring of 2018. The main plots include  transplanted flooded rice and direct seeded rice and sub plots include Kancil herbicide with doses (150, 120, 90, 60, 30), Nomini herbicide with doses (250, 200, 150, 100, 50), Clean Weed with 65 doses; pertilachlor + bensulfuron methyl; clomazone+pendimethalin; Clomazone, weed-infested control and weed-free control. The results showed that in weed-infested conditions, there was a significant difference in paddy yield between the two cultivation methods, so that in flooded cultivation, the yield was 355.6 and in direct cultivation, the yield was 185.1 kg per square meter. In direct cultivation, Kancil herbicide with a dose of 120 and 150 grams per hectare yields (492.5, 546) and Nomini herbicide with a dose of 200 and 250 cc per hectare (412.5, 539 3) and Clean Weed 65 cc. per hectare yield was 534.3 kg per square meter. It is suggested that direct cultivation of rice will be a good method for sustainable production in order to control weeds with herbicides and use less water and obtain optimal yield, considering the limited resources, especially water.