Evaluate the effects of water stress and type of cultivation on competition pigweed (Amaranthus retroflexus) with potatoes

احمدي اصل, بابك and محمد دوست چمن آباد, حمید رضا and خماري, سعيد Evaluate the effects of water stress and type of cultivation on competition pigweed (Amaranthus retroflexus) with potatoes. In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

In order to evaluate the effect of moisture stress and type of cultivation on weed competition (Amaranthus retroflexus) with potato, the experiment was conducted in a completely randomized block design in a greenhouse and laboratory of Faculty of Agriculture, Mohaghegh Ardabili University. Experimental treatments included crop mixing with weeds and separate weed cultivation and stress treatments were 12.5%, 25%, 50%, 75%, and 100% soil capacity. This was applied after establishment of crop and weeds. The results showed that as a result of moisture stress and also in the cultivation of mixed weeds with potato, the competition condition was created and the weed reduced its root weight and depth and then decreased plant height. Due to moisture stress, more than 96% decrease in dry weight of canopy was observed this indicates that the presence of moisture stress and water deficiency in both cultivars can have a significant effect on the dry weight of the canopy biomass and can reduce it and this is very important in terms of weed control and competition with crops.

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