Effect of herbicides and mulch on some morphological traits and yield of sweet corn

Subject Areas :

Sayyed Mehdi Tavasoli Tabayi ¹ ( . Graduated Msc in Agronomy, Department of Agriculture, Islamic Azad University, Varamin Branch, Varamin, Iran. )
Hamidreza Larijani ² ( . Graduated Msc in Agronomy, Department of Agriculture, Islamic Azad University, Varamin Branch, Varamin, Iran. )
Mohammad Nasri ³ ( Research Center for new technologies to produce safe food, Varamin Branch, Islamic Azad University Varamin- Pishva, Varamin, Tehran, Iran. )

Received: 2016-12-08 Accepted : 2017-04-13 Published : 2017-05-22

Keywords: herbicide, sweet corn, Mulch, pre-emergence herbicide, morphologhcal particulars, quality and quantity particulars,

Abstract :

There is no any selective herbicide for sweet corn in Iran and the practices of weed control strictly raise the costs of production. To study of the common dental herbicides for dent corn and mulch on the growth and yield of sweet corn and weed suppression, an experiment was conducted in a randomized complete block design with three replications at Varamin, Iran, in 2015. The treatments were included usage of 1.Nicosulfuron (1.5 lit.ha-1),  2. Nicosulfuron+ Rimsulfuron (Ultima, 175 g.ha-1) ,3. Bentazon (2.5 lit.ha-1), 4. mixed of Atrazine (1.5 kg.ha-1) +Acetochlor (4 lit.ha-1), 5. mixed of Nicosulfuron (1lit.ha-1) + Bromicide MA (1 lit. ha-1), 6.silver on black plastic mulch, 7. blue biodegradable plastic mulch, 8. non-weed control and  9.complete hand weeding. Results revealed that mixed of atrazine + acetochlor controlled weed 100% related to weedy check. The highest stem height (134 cm) and diameter (25 mm), total dry weight (5888 Kg.ha-1) and feed (13110 Kg.ha-1) was also obtained in the same treatment. The Most ear length without any significant difference was measured in the control, nicosulruron + bromicide MA, atrazine + acetochlor, and silver on black plastic mulch treatments, respectively. Yield in plastic and Biodegradable mulch treatments fell to 18% and 23% compared to control treatment. Also maximum protein content was in Nicosulfuron treatment (2.4%) and maximum sugar solution content was in biological mulch (13.2%). With regard to the fresh consumption of sweet corn, the use of mulch can eliminate harmful effects of herbicides on plants and environment