Mohsen Feyzolahi; Ali Monsefi; Afrasyab Rahnama; masomeh farzaneh
Abstract
In order to investigate the effects of chemical and integrated weed management on yield and yield components of grain maize and weed population, the study has been conducted as a randomized complete block design with three replications in 2018-19 in Shavar Research Center in Shavar region of Shousha ...
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In order to investigate the effects of chemical and integrated weed management on yield and yield components of grain maize and weed population, the study has been conducted as a randomized complete block design with three replications in 2018-19 in Shavar Research Center in Shavar region of Shousha city. Treatments include unweeded (control), hand weeding, 1.5 liters of atrazine, 1 liter of atrazine + straw mulch, 175 g of ultima, 150 g of ultima + straw mulch, 1.5 liter 2,4-D + MCPA, 1 liter 2,4-D + MCPA + straw mulch, 1.5 liters cruise, and 1 liter of cruise + straw mulch. Results show that the highest grain yield has been obtained in hand weeding treatment as well as 1 liter of cruise + straw mulch by 14.4 and 13.2 t ha-1, respectively. The highest biological yield is recorded in hand weeding treatment (31.5 t ha-1). In case of harvest index, 1.5 liters of cruise show the highest value (55.7%), followed by 1.5 liters of 2,4-D + MCPA and 1.5 liters of atrazine by 53.6% and 47.7%, respectively. In terms of weed population dynamics, hand weeding, and 1 liter of cruise + straw mulch cause the greatest decrease in weed population and dry weight which reduce crop competition and increase productivity. In general, based on the results, the adoption of integrated approaches (chemical + cultural + mechanical) can make a significant contribution to increasing corn yield and reducing environmental pollution.
Mohammad Reza Moradi Talavat; Ataallah Siadat
Abstract
To investigate wheat and wild mustard growth and competition to N levels, an experiment was conducted in Ramin Agriculture and Natural Resources University of Khouzestan, located at 36 km North of Ahvaz. Treatments included planting wheat solely, wild mustard solely, and intercropping wheat and wild ...
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To investigate wheat and wild mustard growth and competition to N levels, an experiment was conducted in Ramin Agriculture and Natural Resources University of Khouzestan, located at 36 km North of Ahvaz. Treatments included planting wheat solely, wild mustard solely, and intercropping wheat and wild mustard in pots. These combinations were exposed to N levels including 0, 60, 120 and 180 kg.ha-1. The results showed that grain yield, dry matter and spike number of wheat increased by increased N levels in sole crop treatment. These traits decreased by N levels when competing against wild mustard. Wheat grain and total protein content increased up to 120 kg N.ha-1 by increased N levels, but decreased while competing against wild mustard. The highest N apparent recovery by wheat was obtained from sole cropping of this crop and 120 kg N.ha-1. The lowest rate of this parameter was observed in competition condition against wild mustard and the level of 180 kg N.ha-1. The results showed that wild mustard traits had positive response to increased N levels, regardless to competition against wheat.