Studies on the use of mineral and bio nitrogen fertilizer with some of growth regulators on growth and yield of cotton variety Giza 80
2011
Gebaly, S.G.
Two field experiments were carried out at Sids Agricultural Research station, Beni-suef Governorate in 2008 and 2009 seasons, to study the response of growth, fruiting and yield of the Egyptian cotton cultivar Giza 80 (G. barbadense L.) to organic manure (sheep manures) alone or combined with mineral nitrogen fertilizer and foliar application with Kinetin and Gebirline GA3. The treatments included the control treatment, one concentration of each of kinetin (5 ppm) and GA3 (100 ppm) and their combination which sprayed at the squaring stage. Results obtained could be summarized as follows: The combined application of 30 kg N / fed. as sheep manures a long with 30 kg mineral N / fed. as ammonium nitrate significantly increased plant height, Number of fruiting branches / plant, Number of open bolls / plant, boll weight, seed cotton yield (feddan), seed index and chemical composition of leaf as compared with the control in both seasons. Generally, the application of sheep manures at rate of 30 kg N / fed combined with 30 kg N / fed. (ammonium nitrate) and sprayed by Kinetin gave the highest cotton yield and yield components in both seasons. The studied treatments had insignificant effect on earliness % and fiber quality in both seasons
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