الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
Flax (Linum usitatissimum L.) crop is grown in Egypt as a dual purpose type tI fiber and seeds”, and
its yield and quality are affected by many factors such as varieties, microelements and seeding rates.
Therefore, this study was carried
investigate the effect of those factors on yield and quality of fibers in flax.
out to growth, Two field experiments were carried out at El- Gemmeiza AgricUltural Research Station, ARC in 1989/90 and 1990/91 seasons, to evaluate two promising flax
strains, S. (19/31), ”released as Giza 7”, and S.(2419/1); grown under different microelement treatments
and different seeding rates in relation to growth, yield and yield components, in addition to anatomical
and quality characters.
A split-split plot design with four replications
was carried out in both seasons, the main plots were
devoted for the two strains. The sub-plots were
assigned to the three microelement treatments i.e.,
zinc, cupper at 250 ppm concentration and untreated
control and the sub-sub plots for the six seeding rates
i.e., 750, 1000, 1250, 1500, 1750 and 2000 seeds/m2•
The main findings of the present investigation
could be summarized as follows:
A : Growth characters
1. 51 (19/31) plants were taller than 52 (2419/1)
plants, particularly at the later stages of
growth. Also, 51 plants had higher technical stem
length compared with 52 ones.
No significant difference was detected with
regard to dry weight per plant between the two
strains. However, plants insignificantly
outweighed 51 plants at all stages of growth.
Wi th regard to percentage of different plant
organs to total dry weight it was observed that 51
plants had higher stem dry weight percentage at
fourth stage of growth, whereas 52 plants recorded
higher leaves dry weight percentage, but no
significant difference was detected in roots dry
weight percentage.
Also $2 plants had higher number of upper
branches and number of capsules per plant compared
with 51 plants.
2. Zinc application significantly increased plant
height at all growth stages, stem dry weight
percentage (at early stages of growth). Cupper
application increased leaves dry weight percentage
at early and later stages of growth.
Microelements had no significant effects on
technical stem length, dry weight per plant, roots
dry weight per plant, number of upper branches per
plant and number of capsules per plant.
3. Increasing seeding rate significantly increased
plant height at all growth stages, technical stem
length, stem dry weight percentage and
significantly reduced dry weight per plant, leaves
dry weight percentage, roots dry weight percentage
at all growth stages, upper branches number per
plant and number of capsules per plant.
4. Most of the interactions between the three
experimental factors had no significant effects on
growth characters. Exceptions were observed for
the following interactions:
strains x microelements on dry weight per plant
after 75 days from planting, leaves dry weight
percentage after 75 days and dry weight per plant
after 115 days from planting in both seasons.
strains x seeding rates on roots dry weight
percentage after 115 days in the first season.
Microelements x seeding rate on technical stem
length after 95 and 115 days from planting in both
seasons.B. Yield and yield components
I Straw yield and its related characters
1.51 (19/31) plants were significantly superior to 52
(2419/1) plants with regard to technical stem
length; and produced greater number of basal
branches per plant and higher straw yield per
plant and per feddan, whereas 52 plants were
higher in length of top capsules zone and stem
diameter. 51 outyielded 52 in straw yield per
feddan by 4.14 and 12.16% in the first and second
season, respectively.
2. Zinc application insignificantly increased
technical stem length. Also, Zn and eu in general
and Zn in particular insignificantly increased
length of top capsule zone, stem diameter, number
of basal branches per plant, straw yield per plant
and per feddan.
3. Increasing seeding rate significantly increased
technical stem length and straw yield per feddan,
but significantly decreased length of top capsule
zone, stem diameter, number of basal branches and
straw yield per plant.
4. The effect of interactions between the
experimental factors was only significant between:
strain x microelements on straw yield per feddan
in the first season and among strains x
microelements x seeding rates on straw yield per
plant in both seasons.
II Seed yield and its related characters
1. S2 (2419/1) plants were significantly superior to
Sl (19/31) with regard to number of capsules per
plant, number of seeds per capsules and per plant,
number of upper branches per plant, seed YfeJd;plant
and per feddan, and seed index.
Such results indicate the superiority of 52 in
seed production where it outyielded Sl by 2.40 and
2.47% in the first and second season,
respectively.
2. Microelements application had no significant
effect on all seed yield components. However,
slight and insignificant increases in seed yield
and its components were observed due to Zn and eu
application.
3. Increasing seeding rates significantly reduced
seed yield components. On the other hand, seed
yield per feddan significantly increased as a
result of increasing seeding rate. The seed yield
per feddan was increased by about 58 kg per feddan
due to increasing seeding rate from 750 to 2000
seeds/m2 in the two seasons.
4. The effect of the interaction between strains and
seeding rates was only significant on number of
capsules per plant in 1989/90 season.
Also, the second order interaction significantly
affected number of capsules per plant (in the
first season), number of seeds per plant (in the
first season) and number of upper branches per
plant in both seasons.
III Technological characters
1.51 (19/31) plants were significantly superior to 52
(2419/1) plants in fiber yield per plant and per
feddan, fiber length, long fiber percentage as
well as fiber fineness. On the other hand, 52
plants were significantly superior to 51 plants
with regard to oil percentage as well as oil yield
per feddan.
51 outyielded 52 in fiber yield per feddan by 24
and 29%, respectively, in the first and second
season, whereas 52 outyielded 51 in oil yield by
7.5 and 7.8%, respectively in 1989/90 and 1990/91
seasons.
2. Zinc and cupper application significantly
increased fiber yield per feddan, fiber length,
long fiber percentage, fiber fineness and oil
yield per feddan. On the other hand, fiber yield
per plant was significantly decreased with
increasing seeding rate.
4. The second order interaction among strains,
microelements and seeding rates had a significant
effect on long fiber percentage in both seasons.did not significantly affect
technological characters.
C. Anatomical studies
1. 51 (19/31) had higher
fiber ratio, fiber/xylem%,
per cross section and
(2419/1) .
values of fiber area,
number of fiber cells
fiber index than 52
2. Microelements (Zn and
anatomical characters
untreated ones. eu) of favourably increased
plants compared with
3. Increasing seeding rates to 1500 or 2000 seeds/m 2
recorded the highest means of fiber area
percentage, number of fiber cells per bundle and
per cross section, fiber/xylem percentage and
fiber index in both seasons.