The research was Carried out in Jisr area in the province of Idlib during the growing
season 2013 - 2014 to study the effect of planting dates in autumn sowing 28/9/2013 = (1),
8/10/2013 = (2), 18/10/2013 = (3) and spring sowing 18/3/2014 = (1), 28
/3/2014 = (2),
8/4/2014 = (3) on yield and growth parameters.
The results showed that the autumn sowing has a significant increase in growth
parameters compared to spring sowing: adapting coefficient (76.67-82.28%), Plant hight
(67.15 - 56.3 cm), number of branches/plant (11.63 - 6.84), number of head/Plant (21.39 -
17.76), oil content (23.19 - 20.68)%, yield petals (96.12 - 60.57) kg/ha, seed yield (1331.82
- 768.31) kg/ha, oil yields (315.15 - 158.99) kg/ha to autumn and spring, respectively.
While maturity date of autumn plants was delayed compared to spring (245.33 - 145.33)
Day.
When sowing was of autumn, growth parameters of third soing date were a
significantly higher compared to both the second and first sowing: number of branches /
plant, number of heads / plant, number of seeds / head, oil ratio (%), oil yield (kg/ha),
yields seeds ( kg/ha), petals yield (kg/ha). Wheras the first sowing date has delayed
maturity date compared of both the second and third sowing dates.
When sowing was in spring, growth parameters of the first sowing dates were a
significantly higher compared to both the second and third except for days to maturity.
The experiment was conducted at Tayba Research Station, General
Commission for Scientific Agricultural Research during 2011-2012, and 2012-
2013 growing seasons. Randomized block design with three replications was
used to investigate phenotypic va
riances and to determine correlation of yield
components of six local genotypes of radish. Significant differences between
genotypes were appeared in diameter, length and weight of radish root. The
correlation analysis revealed that root weight was positively and significantly
correlated with both yield (0.964) and root diameter (0.274). Yield was
positively and significantly correlated with root diameter (0.382). Root length
was positively and significantly correlated with plant height (0.333) and
number of leaves (0.329) per plant.
This study was conducted at Research Altyba station where belongs
GCSAR during 2007-2008. by using nine parental lines and their 36 F1 hybrids,
were obtained from 9x9 half diallel design. The study included stem, earliness
and yield component char
acters, in order to estimate of hetrerosis compare to
the mid parents, the better parent and to the standard hybrid, and determine
the superior hybrids advantage to invest in agricultural production and benefit
from as well as in breeding program development yield of squash.
Heterosis over mid parent was evident in all yield components, The hybrid
(IL3XIL6) exhibited (16.89 ، 57.57%) respectively for the ratio pistilate flower
% and fruit number per plant, negative heterobeltiosis (-13.71%) was recorded
by the hybrid (IL3XIL8)for the number of nodes to first flower, While the
hybrid (IL3XIL5) showed maximum positive and significant heterobeltiosis
(13.06 %) for ratio pistilate flower%, and the hybrid (IL3XIL6) for fruit
number per plant (59.47 %) Whereas the results showed that, four hybrids had
positive and high significant standard heterosis for plant yield, the hybrid
(IL6xIL7) and (IL3XIL6) had maximum value (32.38, 28.68% ) respectively
Five improved genotypes of durum wheat (T. turgidum var. durum) (Lahn,
Cham1, Gezira17, Bouhouth 5, and Acsad 65) were planted under the
conditions of the agricultural region (Bouka) of the Faculty of Agriculture-
Tishreen University during the ag
ricultural year 2002-2003, with a split-plot
arrangement to study the effects of flag leaf removal on grain yield and its
components.The genotypes differed significantly in flag leaf area, stomatal
frequency, yield parameters and protein content.
Flag leaf removal significantly reduced plant height, number of spikelets/
spike, number of grains/ spike, 1000 kernels weight and grain yield, while grain
protein content significantly increased.
There was a positive correlation between the flag leaf area and 1000-
kernels weight and grain yield, but protein content was negatively correlated
with grain yield.
This experiment was conducted at the Faculty of Agriculture, Damascus
University (2001 – 2002), to assess the effect of radiostimulation of seeds of two
durum wheat varieties (Hourani and Cham 3) on some morphological traits
and yield components,
by using three doses of gamma rays (10, 15, and 20 GY).
The study showed significant differences among radiation doses. The high
doses (15, 20 GY) caused a significant deterioration in growth and development
of plants, as well as yield components of the two varieties.
At Tishreen University in the Faculty of Agriculture a study was performed during
the year(2014-2015),The experiment aimd to demonstrate the effect of increasing
concentrations of both sodium chloride(0,10,15,20 dsm-1) and gibberellic acid(0,25,75,
100
mg/l) and their interaction on some yield components of weat (SHAM10).The experiment
was designed as Completely Randomized Design(CRD)by three replicates(3x4x4).Data
were statistically analyzed to find out the least significal differences (LSD)between
treatment at(0,05)level.Results indicated that increasing of sodium chloride concentration
caused significant decreases in yield components(biological
yield,spikelength,numberofspikelets/spike,number of grains/spike,weight of1000 grain and
grains yield/pot.The treatment with GA3 acid especially (75)mg/l indicated significant
increases in all averages of yield components.Results of interacions for both factors
indicated that foliar aplication of GA3 acid counteracted that advers effects of high
concentrations of sodium chlorde of yield components of the (SHAM10).
This study was carried out during the growing season of 2015
to study effect od three planting date (1 Feb., 15 Feb. and 1
March) and four levels of nitrogen fertilization (0, 40, 60 and 80
kg/Ha) with interactive effect between them on some yield
components of cumin.
