Effect of Ammonium Sulfate Additive on the Efficacy of Nicosulfuron Herbicide in Corn

Abstract

In order to investigate the relationship between the effect of the applied doses of the herbicide of Nicosulfuron and the additive of Ammonium Sulfate on weed control and grain yield of corn (Zea mays L. Sc.704), an experiment was conducted on a farm in Fasa region, Fars, Iran in 2019 and 2020as factorial in randomized complete block design. Assuming the effect of the year is random. The experimental factors included herbicide (Nicosulfuron) (As doses of 0, 30, 50, 70, 90g the active ingredient in hectare) and the additive of Ammonium Sulfate (as 0, 2.5 and 5%). In order to describe the relationship between doses of herbicide and biomass of the weeds in each of the three levels of Ammonium Sulfate, the Logistic 3 parameters model was used and to describe the relationship between the biomass of the weeds and the levels of herbicide doses and Ammonium Sulfate, the Lorentzian 4 parameters model was used. The results showed that the use of Nicosulfuron reduced the dry weight of all weeds and with the use of Ammonium Sulfate, the dry weight loss of weeds was intensified. The effective dose for controlling half of the Chenopodium album was lower than for other weeds. Ammonium Sulfate, as an additive, was able to improve the performance of Nicosulfuron to increase the chlorophyll index, photosynthesis rate and grain yield components. Consumption of slightly more than 60g Nicosulfuron as a mixture with Ammonium Sulfate increased the yield by 2.5 to 10.5%, and by consuming 70g Nicosulfuron, the biological yield increased to 24500kg.ha 1.

Keywords

• adjuvants
• cruz
• maize
• model
• yield