STUDY OF COMPETITIVE ABILITY OF SOME HYBRIDS OF MAIZE WITH ASSOCIATED WEED

Document Type : Research articles.

Authors

Agron.Dept., Fac. Agric . Fayoum Univrsity , Egypt .

Abstract

Two field trials were performed at Tamiya Experimental Station,
Fayoum Governorate Egypt , during 2012 and 2013 seasons , to study the
competitive ability of some maize hybrids in associated weeds by modification
of crop density .The experiment included: Three hill distances (25,30and 35
cm apart) on one side of ridge at approximately 28000,23333 and 20000 plants
/ fed ,Three weed control treatments, one hand hoeing ,hand hoeing twice and
the unweeded (control) and Three maize hybrids , i.e. , T.W.C.310,
T.W.C.1100 and T.W.C. Nefertiti 3.
Results showed that all weeded treatments significantly depressed
weed growth comparing to the unweeded one .application of hoeing caused
significant increases in plant height, ear height ,number of ear /plant , all ear
characters , and grain yield / feddan . Moreover, two hoeing superiored one
hoeing in all characters. Each increases in hill distances resulted in increasing
total weed dry weight, ear height, number of ear /plant ,ear length ,ear
diameter , grain number / ear ,ear weight, grain weight /ear , 100- grain weight
and grain yield / feddan .Neffertiti 3 surpassed other hybrids in all grain
characters and grain yield / feddan .While T W C 1100 recorded the lowest
values

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