Document Type : Research articles.
Authors
1
Deciduous fruit Dept., Hort. Res. Inst., ARC, Giza, Egypt
2
Soil and Water Department, NRC, Giza, Egypt
Abstract
The aim of this study is to investigate the effect of foliar
application of some organic substances (humic acid, fulvic acid and Algae
extract) on vegetative growth, yield and fruit quality of “Costata”
persimmon trees grown on clay loamy soil under surface irrigation.
This study was conducted during 2011 and 2012 seasons at EL-Kanater,
Horticultural Research Station, Kalubeia governorate, Egypt on "Costata"
persimmon trees (Diospyros Kaki L.). The trees were 22 years old budded
on "Lotus" rootstock and spaced at 4x5 m apart. Twenty one trees were
sprayed four times {at full bloom, two weeks after fruit set, after one
month of fruit set and at month before harvest} with humic acid at 1 or
2%, seaweed extract at 1 or 2% as well as fulvic acid at 1 or 2%.
The results showed that, humic acid and algae extract gave better
vegetative growth {leaf area, shoot length, leaf dry weight}, nutrition
status {leaf content of N, P, K, Fe, Mn and Zn}, fruiting {fruit set and
yield} as well as fruit characters {weight, size, dimensions, firmness},
{TSS%, acidity% and tannins%} as compared with control in two studied
seasons. Also, higher concentration (2%) of all tested substances was
more effective than low one.
Main Subjects
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