STUDY OF DEFOLIATION INTENSITY AND NITROGEN RATE EFFECTS ON YIELD, YIELD COMPONENTS AND GERMINATION TRAITS OF PRODUCED SEED IN WHEAT (Triticum aestivum)

Heidari Hassan, Aram Fatahi, Mohsen Saeedi, Mahmood Khoramivafa

Abstract


A field experiment and a laboratory experiment were conducted in 2011-2012 to determine the effect of defoliation intensity and nitrogen rate on yield, yield components and seed germination of wheat (Triticum aestivum). The field experiment included three defoliation intensities (0, 1/2 and all leaves per plant) from top to bottom leaves and three nitrogen rates (0, 75 and 150 kg N ha-1). Seeds of the field experiment were used for the laboratory experiment. In the laboratory experiment, germination traits of seed produced from maternal plant under defoliation and nitrogen rate were tested. Results showed that defoliation had a significant effect on seed yield, seed weight, spike weight, seed number per spike, peduncle length and leaf and stem weight. Application of nitrogen fertilizer can save seed yield even under complete defoliation. Defoliation and nitrogen fertilizer application on maternal plant had a minor effect on germination traits of produced seed.

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DOI: http://dx.doi.org/10.15835/arspa.v85i1-2.9992



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