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.
Amir Aynehband; saber hosaini; masomeh farzaneh
Abstract
The evaluation of different forage crops (clover, barley, chickpea, vetch, and fenugreek) and planting method's effect on the quality and quantity of forage yield was the main goal of this study. This study was conducted as a split-plot based on a randomized complete blocks design with three replications ...
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The evaluation of different forage crops (clover, barley, chickpea, vetch, and fenugreek) and planting method's effect on the quality and quantity of forage yield was the main goal of this study. This study was conducted as a split-plot based on a randomized complete blocks design with three replications on the experimental research field of agriculture faculty, the Shahid Chamran University of Ahvaz during 2017-2018. Main plot included three planting methods (row intercropping with 10 cm and 20 cm interval and mixed intercropping) and sub-plot was seven forage crops with dominance of barley (50% barley+50% clover as control, 50% barley+25% clover+25% chickpea, 50% barley+25% clover+25% vetch, 50% barley+25% clover+25% fenugreek and 50% barley+25% vetch+25% fenugreek). Total forage yield and yield components and also, some quality parameters of forage (ADF, NDF, WSC, DMD, raw fiber and ash were measured. The results showed that the highest total forage yield (1268.9 g.m-2) was belonged to crop diversity of 50% barley + 25% chickpea + 25% fenugreek with 10 cm - row intercropping. It can be due to the highest of all forage yield components including stem, leaves and reproductive dry weight.