Effect of weed interference and different amounts of nitrogen on yield and yield components of grain sorghum In Ahvaz condition
Subject Areas :Narges Kosari 1 , Mani Mojaddam 2
1 - M.Sc. of Agronomy, Islamic Azad University Varamin Branch, Varamin-Pishva. Iran.
2 - Assistant prof. of Agronomy, Islamic Azad University Ahvaz Branch, Ahvaz. Iran.
Keywords: Weed interference, Yield and yield components, Grain sorghum, Different amounts of nitrogen,
Abstract :
In order to Effect of weed interference and different amounts of nitrogen on yield and yield components of grain sorghuma split plot experiment based on randomized complete block design with three replications in the 2012 crop year in Salemi Shahid farm located in Ahvaz condition carried.The main plot in this experiment was included three levels of Nitrogen Fertilizer N80, N140 and N200 Kg. ha-1 nitrogen from urea and Subplot Was included three levels of weed competition, weeding weeds until the end of grow (w1), Weeding weeds up to 6-leaf stage (w2) and Weeding the heading stage. The results showed that with the increased application of nitrogen, yield and yield components (Number of spikelet in panicle, Number of grain in spikelet, Number of grain in panicle and Weight of 1000 grains) show a significant increase. So that the maximum grain yield of sorghum with an average of 365.69 grams per square meter to 200 kg N ha respectively. Also reduce weed interference caused significant increase in these characteristics and the maximum grain yield of weeding weeds with an average of 427.19 grams per square meter, respectively that due to a decrease in yield components, grain yield decreased.
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