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Yield and yield components of cowpea as affected by different sources and application rates of nitrogen fertilizers



Yield and yield components of cowpea as affected by different sources and application rates of nitrogen fertilizers



Journal of Food Agriculture and Environment 9(3-4): 295-298



This study was conducted in order to determine the application of biofertilizers, instead of chemical fertilizer for optimal nutrition of crops. The study was performed in the form of field experiment in factorial layout based on complete randomized block design with three replications on cowpea at Agricultural Research Center in western Azarbaijan, during growing season of 2008-2009. Experimental treatments composed of 4 rates (Nitragine biofertilizer, Yashil chemical fertilizer, Nitragine + Yashil, without fertilizers) as factor A and 4 rates of fertilizers (0.26.25, 52.5 and 75 kg/ha urea) as factor B. Results of analysis showed that between rates of factor A (Nitragine biofertilizers, Yashil chemical fertilizer) and rates of factor B (Nitrogenous chemical fertilizer) and interplay between different levels of factor A and B at traits of grain yield, number of grains per pod, number of grains per plant, number of pods per plant, 1000 grain weight, biomass yield, harvest index, grain yield per unit area, number of leaves, plant height and pod length had significant difference at 5% and 1% level. Study levels of factor B showed that application of 52.5 kg/ha urea had maximum increase on traits. The results obtained from interplay of different levels of factor A and B show that in all traits which were studied the most effective compound was related to Yashil + Nitragine with 52.5 kg/ha urea. Application of biofertilizers with chemical fertilizers had maximum in all studied traits.

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