Abstract
In field trials at Giza in 1986–1987, cotton cv. Giza 75 was sown at 166,000, 222,000 and 333,000 plants/ha and given foliar applications of 0, 250, 500 and 750 ppm Cycocel (chlormequat) or Alar (daminozide). As plant density increased, there was a decrease in cottonseed yield/ha, seed index, seed protein content, oil and protein yields/ha, oil refractive index, iodine value, unsaponifiable matter and unsaturated fatty acids (myristoleic, oleic and linoleic). In contrast, as plant density increased, there was an increase in oil acid value, saponification value and saturated fatty acids (caprylic, capric, lauric, tridecylic, myristic, palmitic and stearic). Application of Cycocel or Alar increased cottonseed yield/ha, seed index, seed protein content and oil and protein yield/ha, oil refractive index, iodine value, unsaponifiable matter and unsaturated fatty acids. However, there was a decrease in oil acid value and saponification value. There were no differences among application rates of either chemical on cottonseed yield/ha. The highest oil and protein yield/ha was observed with Cycocel applied at 750 ppm, followed by Alar at 250 ppm. Applying Cycocel at 250 ppm gave the highest oil refractive index and unsaponifiable matter, and the lowest acid value. Application of Alar at 250 ppm gave the highest oil iodine value and the lowest saponification value, and also at 250 or 500 ppm gave the highest oil unsaturated fatty acid composition. Interaction was positive between plant density, Cycocel and Alar and affected cottonseed yield/ha. The 166,000 plants/ha and application of Cycocel at 750 and Alar at 250 ppm are recommended for the improvement of cottonseed yield and quality.
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References
Hefni, El-S.H., Z.M. Sawan and A.E. Hossam El-Din,Egypt. J. Agron. 6:45 (1981).
Rakhmatov, O., T. Egamshukurovt and O. Razimuradov,Khlopkovodstvo 3:15 (1983).
Seshadri, V.,Indian J. Agric. Sci. 59:107 (1989).
Kler, D.S., D. Raj and G.S. Dhillon,Environment and Ecology 7:800 (1989).
Gubanova, N., T. Pirakhunov, O. Dzhuraev and T. Shimov,Khlopkovodstvo 10:36 (1984).
Abdel-Al, M.H., and E.T. Eid,Annals of Agric. Sci., Moshtohor 23:41 (1985).
Association of Official Analytical Chemists,Official Methods of Analysis, AOAC, Arlington, 1985.
Kates, M.,Laboratory Techniques in Biochemistry and Molecular Biology, edited by T.S. Work, and E. Work, North-Holland Publishing Co., Amsterdam, 1972.
Official Methods and Recommended Practices of the American Oil Chemists’ Society, edited by R.O. Walker, American Oil Chemists’ Society, Champaign, 1985.
Vogel, A.I.,A Textbook of Practical Organic Chemistry, 3rd edn., English Language Book Society and Longman Group Ltd., Essex, 1975.
Ashoub, A.H., A.E. Basyony and F.A. Ebad,Annals of Agric. Sci., Moshtohor 27:761 (1989).
Snedecor, G.W., and W.G. Cochran,Statistical Methods, 7th edn., Iowa State University Press, Ames, 1980.
Thiagarajan, C.P., and K.R. Ramaswamy,Madras Agric. J. 71:289 (1984).
Nikolov, G.,Rasteniev dni Nauki 22:29 (1985).
Saleem, M.B., and D.R. Buxton,Crop Sci. 16:523 (1976).
Bruyn, L.P. DE, J. DE Kock and J.J. Human,Sous African J. Plant and Soil 6:154 (1989).
Wareing, P.E., and I.D.J. Phillips,Growth and Differentiation in Plants, 3rd edn., Pergamon, Oxford, 1981, p. 256.
Wareing, P.E., and I.D.J. Phillips,The Control of Growth and Development in Plants, Pergamon Press Ltd., Oxford, 1970.
Gardner, F.P.,Agron. J. 80:159 (1988).
Pinkhasov, Yu.I., M.I. Dzhafarov and L.V. Tkachenko,Fiziologiya Restenii 30:984 (1983).
Hsi, C.H., and J.L. Davidson,Proc. Am. Peanut Res. Educ. Soc. 12:62 (1980).
Agakishiev, D., and R. Kuzier,Khlopkovodstvo 7:23 (1983).
Azab, A.S.M., M.H. Abdel-Al and M.S. Ismail,Annals of Agric. Sci., Ain Shams Univ. 32:1507 (1987).
Gadakh, S.R., K.M. Pol and V.A. Patil,J. of Maharashtra Agric. Univ. 13:352 (1988).
Terbea, M., V. Tanase and F.M. Stoenescu,Analele Institutului de Cercetari pentru Cereale si Plante Tehnice Fundulea 52:393 (1985).
Singh, J., and A.S. Warsi,Indian J. Agron. 30:263 (1985).
Zahran, M., and S.H. Abou Khadrah,Proc. 3rd Arab Pesticide Conf., Tanta Univ., Egypt II:391 (1979).
El-Kholany, A.A., and Z.M. Sawan,Egypt J. Agron. 5:25 (1980).
Kotecki, A., and W. Malarz,Zeszyty Naukowe Akademii Rolniczej we Wroclawiu, Rolnictwo 47:117 (1988).
Kariev, A.U., inSbornik rabot po genetike, selektsii i semenovdstvy Khlopchatnika, Tashkent, Uzbek SSR, 1972, pp. 188–193.
Al-Gharbi, A.S., and I.P. Yousif,ZANCO 2:51 (1989).
Zafirova, T., C. Christov and V. Iliev,Proceedings of the IV International Symposium of Plant Growth Regulators, edited by Lilov, D., G. Vassilev, C. Christov and T. Andonova, Sofia, Bulgaria, M. Popov Institute of Plant Physiology, 1987, pp. 797–800.
Hedin, P.A., J.C. McCarty, A.C. Thompson, J.N. Jenkins, D.H. Smith, R.L. Shepherd and W.L. Parrott,J. Agric. and Food Chemistry 36:742 (1988).
Kar, C., B. Barua and K. Gupta,Indian J. Plant Physiol. 23:144 (1989).
Osman, R.O., and B.H. Abu-Lila,Z. Acker-und Pflanzenbau 155:82 (1985).
Sawan, Z.M., R.A. Sakr, F.A. Ahmed and A.M. Abd-Al-Samed,J. Agron. Crop Sci. 166:157 (1991).
Osman, R.O., and F.A. Ahmed,The Annals of the Faculty of Agric., Ain Shams Univ. 28:517 (1982).
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Sawan, Z.M., Basyony, A.E., McCuistion, W.L. et al. Effect of plant population densities and application of growth retardants on cottonseed yield and quality. J Am Oil Chem Soc 70, 313–317 (1993). https://doi.org/10.1007/BF02545314
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DOI: https://doi.org/10.1007/BF02545314