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Register a new userالتأثير الأليلوباثي لبقايا محصول الخيار Cucumis sativus L والكوسا Cucurbita pepo L في نمو بعض الأعشاب الضارة
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Tishreen University رسالة ماجستير
Publication date
2013
fields
Agricultural Engineering
and research's language is
العربية
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التأثير الأليلوباثي لبقايا محصول الخيار Cucumis sativus L والكوسا Cucurbita pepo L في نمو بعض الأعشاب الضارة
No English abstract
References used
Aburjai; T and Natsheh, F M 2003 Plants used in cosmetics Phyother Res 17:987-1000
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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
This study was designed to estimate the allelophatic effect of cogongrass (Imperata
cylindrica L.), in the growth of one year old of olive seedlings, in a nursery (greenhouse)
conditions. Two experiments were conducted in this study. In the first e
xperiment, the
effect of the aqueous extracts of cognograss leaves, rhizomes, and roots, at concentrations
of (2%, 4% and 8%) on the growth of olive seedlings (total length and diameter) were
evaluated. The results of this experiment indicated an inhibitory effect of the 4% and 8%
aqueous extracts on growth parameters. It was found that treatments with 4% and 8%
aqueous extracts caused significant reduction (60.2% and 83%) respectively in the total
length, in compare to the control. As for the 2% aqueous extract, it showed a stimulation
effect in the growth, an increase about 31.5% was recorded for the total length in compare
to the control. A similar result was observed in regard the seedlings diameter growth. The
2% aqueous extract showed an 56.8% increase in the rate of diameter growth, while the
4% and 8% extracts showed a reduction effects 80% and 91.5% respectively. The second
experiment evaluated the effect of dried powder of cogongrass parts at concentrations of
(2%, 4% and 8%) on the growth of olive seedlings.
This study was conducted at the vegetable field of department of
horticulture and landscape design, college of agriculture and forestry ,Mosul
university, during spring of 2007 and 2008, to study the effect of times and
levels of nitrogen fertiliz
ation on some characters vegetative growth, flowering
,and yield of summer squash .Result indicated that, the time of nitrogen
fertilization at the stage of fruit-set caused a significant increased in the leaf
number /plant ,length of the plant and the fresh weight/plant. While the time of
nitrogen fertilization wasn't affected significantly the total yield. The level at
320 kg.N/ha caused a significant increase of the characters vegetative growth
and total yield. Also result revealed that, the interaction between the stage at
fruit set and nitrogen fertilization at 320 kg.N/ha led to increase the total yield
.The yield was found to positively correlation with the plant length ,fresh and
dry weights of plant, leaf area, fruit weight, male and female flowers, and the
sex ratio.
أجري البحث في مخبر الاعشاب الضارة ومزرعة أبو جرش ودائرة المكافحة الحيوية للاعشاب في مركز بحوث ودراسات المكافحة الحيوية والبيت الشبكي
In this research, nine inbreed lines of squash (Cucurbita pepo, L) have been
studied during 2007-2008 seasons. The study contains plant phonological
phases, and the most important morphological and productivity characteristics
related to fruit yie
ld to evaluate the characteristics of every line and identify the
economical lines to use it in the breeding programs. The study showed genetic
variation between the groups for some important economic characteristics as
(the number of fruits per plant, percentage of female flowers, yield per plant,
stem long and number of nodes till the first female flower). The study also
showed that the inbreed lines of squash is a rich source of variation and can be
use in a breeding program to product squash hybrid. The results appeared also
the positive correlation between the productivity and some important economic
characteristics, such as percentage of female flowers (r=0.871**), the number of
fruits per plant (r=0.976**). Whereas negative correlation with the nodes till he
first female flower (r=- 0.494) and internodes long (r=- 0.447). Using cluster
analysis, the inbreed lines were classified into 2 distinct classes A and B, Class
A contained seven inbreed wreathe class B contained Tow inbreed lines.
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