الفهرس 
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Abstract
Two field experiments were conducted at the Rosetta region, El-Beheira
Governorate, Egypt, during 2017/2018 and 2018/2019 growing seasons to study the effect
of water quality, fluvic acid and seaweed extracts on the yield, its components and quality
characters of wheat (Giza 168).
Split- split plot design with three replications was used. The main plots included
irrigation water quality (Nile water and agricultural drainage water), while seaweed
extracts (control, 50 and 100 g SW/fed) was arranged in the sub plot. While fluvic acid
application (control, 1, 2 kg FA/fed) occupied the sub- sub- plot.
The result could be summarized as follows:
5.1.Growth characters:
- The highest mean values of plant height at harvest, leaf area index (LAI), dry matter
accumulation at the three sampling dates, and number of tillers/m2 were recorded
with irrigating wheat plant by Nile river water as compared with agricultural drainage
water in both seasons.
- Foliar application of seaweed extracts at the rate of 100 g/fed encourage the increase
of plant height at harvest, leaf area index (LAI), dry matter accumulation at the three
sampling dates, and number of tillers/m2 when compared with the other treatments.
On the other hand, spray water (control) recorded the lowest mean values of these
traits in both seasons.
- Increasing the rate of fluvic acid from 1 to 2 kg/fed increased plant height at harvest,
leaf area index (LAI), dry matter accumulation at the three sampling dates, and
number of tillers/m2, meanwhile control gave the lowest ones in both seasons.
- The first order of interaction between water quality X seaweed extracts on all the
studied growth characters was significant. The results revealed that the highest mean
values of these traits were achieved by Nile water and foliar application of seaweed
extracts at the rate of 100 g/fed followed by Nile water with foliar application of
seaweed s at the rate 50 g/fed then Agricultural drainage water + foliar application
of seaweed extracts at the rate of 100 g/fed in both seasons.
- The highest mean values of leaf area index (LAI) were obtained by Nile water and
foliar application of fluvic acid at the rate of 2 kg/fed in both seasons.
- The highest mean values of leaf area index (LAI) were obtained by foliar application
of seaweed extracts at the rate of 100 g/fed + soil application of fluvic acid at the rate
of 2 kg/fed in the two seasons.
- The second order of interaction among water quality X seaweed extracts (SWE) X
fluvic acid (FA) on growth characters was significant. The results revealed that the
highest mean values of these traits were obtained by Nile water + foliar application
of seaweed extracts at the rate of 100 g/fed + soil application of fluvic acid at the rate
of 2 kg/fed in the two seasons.
- On the other hand, Drainage water with foliar application of seaweed extracts at the
rate of 100 g/fed + soil application of fluvic acid at the rate of 2 kg/fed increased
growth characters of wheat under drainage water as compared with untreated control
(without SWE or FA) in both seasons.