الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
Four field experiments were carried out at the Agricultural
Research and Experimental Station, Faculty of
Agriculture at Moshtohor, Zagazig Univ., during the two
successive seasons of 1982/83 and 1983/84.
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germination experiments were conducted in a pot trial in
the same seasons. The aim of this study was to investigate
the effect of gamma irradiation and some growth regulators
on growth, yield and chemical content of fenugreek
(Trigonella foenum gracum L.) var. Giza 30.
The soil of the experiments was loam clay in texture
having a pH value 7.85 and organic matter content of 2.5%.
A. The first study :Two germination experiment were conducted
in a pot trail during the two growing seasons. Each
experiment included five seed treatments of gamma irradiation
doses, i.e. 0, 1, 2, 4 and 8 K. rad. The design of
the experiment was randomize complete block with four replications.
Results could be summarized as follows
1. In 1982/83 season, irradiation of seeds with gamma rays
had no significant effect on germination percentage. On
the other hand, irradiation of seeds with 1, 4 and 8 K.
rad trended to greater increase in this character in the
second season.
2. Irradiation had no significant effect of germination
rate index in the two successive seasons3. The irradiation of seeds with gamma rays doses of 1, 2,
4 and 8 K. rad induced significantly reduction in root
length of seedling less than the unirradiated seeds in
the first season only.
4. Seedling height increased significantly as the gamma
doses increased up to 8 K. rad. On the other hand, number
of leaves/seedling significantly decreased by increasing
gamma irradiation doses in the first season only.
5. Dry weight/seedling increased as the gamma doses increased
up to 1 K. rad in the two successive seasons.
D The second study :Two field experiments were conducted, 9
each included 15 treatments which were the combinations of
five gamma ray doses 0, 1, 2, 4 and 8 K. rad) and three IAA
treatments (0, 20 and 40 ppm) or three GA3 treatments (0,
100 and 200 ppm). The treatments were arranged in a randomized
complete block design.
Results could be summarized as follows
1. Effect of gamma irradiation and IAA :
1. Lower radiation doses (lor 2 K. rad) have significant
stimulating effect on plant height as well as dry weight
per plant, whereas higher doses (4 and 8 K.rad) inhibited
fengreek growth characters.
At harvesting stage (160 days from sowing), number of
branches/plant, number of pods/plant and seed yield/fad.
significantly decreased as the gamma rays doses increased
up to 8 K. rad.
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Lower doses of gamma 1 or 2 K. rad increased seed yield
per plant and higher doses decreased weight of seed/plant
in the two seasons.
o
Gamma rays had no significant effect on/biolgoical yield/
fad. and chemical content of fenugreek seeds in the both
seasons.
2. Effect of IAA on growth characters of fenugreek showed
seasonal variation. Application of 20 or 40 ppm was
more effective on plant height and dry weight/plant, respectively
in the first season only.
Number of pods/plant and weight of seeds/plant decreased
as the IAA increased up to 40 ppm in one season,
only. On the other hand, application of 40 ppm significantly
increased seed yield/fad., N-content as well
as Na-content in seeds over the untreated plants.
IAA had no significant effect on the number of pods
per plant, 100-seed weight, biological yield/fad., oil
(%) , K-content and P-content in seeds.
3. Effect of the interaction between gamma rays and IAA
showed significant effect on dry weight/plant, 100-
seed weight, seed yield/fad., biological yield/fad.,
protein (%), oil (%), Na-content, K-content and Pcontent.
II. Effect of gamma irradiation and GA3;
1. Plant height, dry weight/plant, number of branches per
plant, number of pods/plant, lOa-seed weight, yield of
seeds/plant tended to be decreased by exposing seeds to
irradiation up to 4 and 8 K. rad in the both seasons.
The highest seed yield was obtained at 2 K. rad dose
whereas, higher doses, i.e. 4 and 8 K. rad significantly
reduced the seed yield/fad. in the second season only.
On the other hand, gamma ray doses had no significant
effect biological yield/fad. and chemical analysis for
seeds in the both seasons.
2. Number of branches/plant and number of pods/plant significantly
increased by foliar application of GA 3
ppm). On the other hand, the number of branches/plant,
weight of lOa-seed and oil (2) decreased by increasing
GA up to 200 ppm. 3
Increasing GA3 up to 100 or 200 ppm significantly
increased weight of seeds/plant than the untreated plants
in one season only.
The effect of GA 3 on seed yield/fad. showed no part icular
trend could be detected in the two seasons. The
highest yields of seed as well as biological was obtained
from untreated plants with GA3 and from 200 ppm
GA3 in the first and second seasons, respectively.
On the other hand, GA had no significant effect on 3
plant height, dry weight/plant as well as chemical analysis
for fenugreek seeds.
3. Gamma ray doses x GA had significant effect on dry 3
weight/plant, weight of 100-seed, weight of seeds/plant
seed yield/fad, biological yield/fad., Na-content, Pcontent
and K-content of seeds.
c The third study : Two experiments were conducted, each
included 12 treatments which were the combinations of three
concentrations of IAA or GA and four repetations of spray- 3
ing (1, 2, 3 and 4 times). The design of the experiments
was radomize complete block.
Results could be summarized as follows
1. Increasing number of spraying decreased the dry weight/
plant and weight of 100-seed. Spraying plants once time
by IAA or GA3 produced higher dry weight in the first
season. On the other hand, increasing spraying number
to 3 times with IAA and 4 times with GA significantly 3
increased the number of branches, number of pods/plant,
weight of seed/plant and seed yield/fad. in one season
only. whereas, spraying number showed no significant
effect on plant height and biological yield/fad.
2. Dry weight/plant, number of branches/plant, N-content,
A~ ”land K-content significantly increased with increasing
concentrations of IAA up to 40 ppm. On the contrary,
increasing concentration of IAA significantly decreased
the number of pods/plant. While, plant height, weight
of 100-seed, weight of seed/plant, seed yield/fad. and
biological yield/fad. was not significantly affected
with IAA.
Plant height, dry weight, number of branches/plant,
number of pods/plant, weight of 100-seed and K-content
significantly incluased with increasing the GA 3 at higher
concentrations. whereas, application of GA3 had no significant
effect on weight of seeds/plant, and seed yield/
faddan.
3. Effect of the interaction was significant on dry weight,
plant, number of branches/plant, weight of 100-seed and
weight of seed/plant.