INFLUENCE OF SALINITY ON REPRODUCTIVE GROWTH OF THREE EGYPTIAN COTTON CULTIVARS
Mar 10, 2017

Agronomy & physiology WCRC Agro-phyisio-Med-MiddleEast WCRC1
Abstract                                                                         Back to Table of contents

The objective of this study was to investigate to what extent salinity affects the reproductive growth of three Egyptian cotton cultivars Giza 77, Giza 75 and Giza 80. The salinity levels were 0, 2000, 4000 and 6000 ppm of either NaCl, NaCl + CaCl2 or NaCl + KCl.

Salinity delayed the appearance of first flower, reduced the number of fruiting branches, flowers and bolls and reduced the boll period (days from flowering to boll opening).  Salinity also reduced boll size, seed size and lint percentage.  As a result of these effects, salinity reduced seed cotton yield by up to 46% where 6000 ppm of NaCl was applied.

The effects of NaCl were greater than the effects of NaCl + CaCl2 or NaCl + KCl.  All cultivars had a similar response to salinity.

Conclusion

All fruiting characteristics and yield of the studied cotton cultivars were affected by saline conditions.  Higher salinity levels showed a pronounced effect and NaCl alone had a greater effect than the other mixed salts.  All three cultivars reacted similarly to salinity.

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