Document Type : Research articles.
Authors
Horticulture Dept., Fac. Agric., Fayoum Univ., Egypt.
Abstract
A filed trial was conducted during the two successive seasons of
2007/2008 and 2008/2009 in the Experimental Farm at Demo
(reclaimed soil with salinity at 7.84 and 8.01 dSm-1 in the two seasons,
respectively), Faculty of Agriculture, Fayoum University to investigate
the influence of farmyard manure soil application at the rates of 0, 10,
20 and 30m3 fed.-1, ascorbic acid foliar application at the rates of 0, 100,
200, 300 and 400mgl-1 and their combinations on the possibility of
improving growth, yield of onion (Allium cepa L.) plants under the
above mentioned conditions. In comparison with zero rate of farmyard
manure, all other rates significantly increased vegetative growth
characters (i. e. plant height, No. of leaves plant-1, leaves fresh weight
plant-1, raw bulb fresh weight plant-1, total fresh weight plant-1, leaves
dry weight plant-1, bulb dry weight plant-1 and total dry weight plant-1),
total yield and some chemical constituents under study (i.e. total
chlorophyll, total carotenoids, N, P and K of leaves and/or bulbs). The
same results were obtained with all ascorbic acid rates; 100, 200, 300
and 400mgl-1 as compared to the zero rate. Economically, ascorbic acid
treatment at the rate of 300mgl-1 combined with soil fertilization
treatment at the rate of 20m3 fed.-1 proved to be the best and may
counteracted the inhibitory effects of salinity on onion plants.
In view of above mentioned results, it has been concluded that
spraying onion plant (cv. Giza 6), producing with the soil fertilized by
the farmyard manure at the rate of 20m3 fed.-1, with ascorbic acid at the
rate of 300mgl-1 could be counteracted the adverse conditions
particularly, salinity up to 5000ppm and consequently, economic yield
is obtainable.
Keywords
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