FIBRE QUALITIES OF BOLLS DEVELOPED UNDER DIFFERENT DAY AND NIGHT TEMPERATURES IN VARIOUS PAKISTANI COTTON VARIETIES AND MUTANT STRAINS
Abstract
Four commercial cotton varieties NIAB-78, B-557, SLH-41, MNH-93 and four advanced mutants strains N-82, L-21, L-25 and M-626 were used to study the effect of temperature on fibre quality during boll developing stage. The results showed that varieties differed significantly in all fibre quality parameters. There was significant increase in fibre length under medium temperature range while significant increase in fibre strength and highly significant increase in Micronaire values and maturity index under high temperature conditions. The medium temperature range (24.5 to 30.6ï‚°C) seemed to be ideal for cotton fibre development.References
ASTM, American Society for Test and Materials Committee D-13, ASTM Standards on Textile Materials (with related information) Parts 24-25, Philadelphia USA (1966).
X. Cui, calamari and M.W. Suh, Text. Res. J., 68, No. 7 (1988) 467.
J.K. Devwer,. Guest commentary. From an expert’s point of view: factors affecting cotton fibe quality. (2000) http://www.cottonexperts. com/m02/m020404b.html
J.R Gibson, and L.L., Cot. Grow. Rev. 47, (1970) 257.
J.R. Gibson J.R., and L.L. Ray, Crop Sci., 9 (1969) 339.
J.D. Hesketh, and A. Low, Cot. Grow. Rev. 45 (1968) 243
Y.L. Hiesh, Y.L. and A. Wang, Text. Res. J.70, No. 6 (2000) 495.
D. Kelly, Cotton Tales. Central Queensland. Cotton Research Center USA. No. 17 (2002).
J. Liu, H. Yang and Y. Hsieh.. Text. Res. J., 71, No. 12 (2001) 1079..
B. Pyke and R. Schulze, Australian Cotton Grower, 17, No. 6 (1996) 10.
J.E. Quensenberry and R.J. Kohel. Crop Sci., 25, No.4 (1975) 463.
S. Shakkur, Pak. Cot. 25, No.1 (1981).
R.G.D. Steel and J.H. Torree, Principles and Procedures of Statistics. Mc Graw Hill Book Company, New York, USA (1980).
V.S. Thaker, S. Saroop, P.P. Vaishnav and Y.D. Singh, Crop Sci. Res., 22 (1989) 129.
D.F. Wanjura and G.L.Barker, Field Crop Res., 10 (1985) 205.
