This research work aimed to study the effect of different mixtures of growing media
on pepper seedlings and their ability to withstand transplanting shock.The variety QarnAlgazal
of pepper and five mixtures of growing media were used.The mixtures i
ncluded bitmoss
alone,bitmoss with equal volume of soil or sand,soil and cow manure in a ratio of
1:2,and cow manure with soil and sand in a ratio of 1:1:1.
The experiments were implemented in aplastic green house without heating in the
nursery farm of the faculty of Agriculture,Tishreen University.The completely randomizel
design was adopted with three replications for each treatment and 15 plants for each replication.
The results showed that themedia containing cow manurewere the more effective ingrowth
of sapling as represteded by the increased hieght of sapling, number and area of
leafs,fresh weight of both biomass and roots of sapling.The effect was very clear in the
media containing cow manure and soil in the ratio of 1:2.
The objective of this study is to compare the effect of five different Nacl concentration (0,50,100,150,200 mM) on seeds germination and seedling growth of two cultivars of soybean (sb-44,sb-172).
Seeds were germinated in petri dishes with sterile
filter paper moistened with 10 ml of test solution at 25 c˚ in dark .
The obtained results showed that germination percentage , length of root and hypocotyl were decreased with the increase of the Nacl concentration in the medium. The best values was from cultivar sb-44 .
After seven days of incubation , significant differences were observed between control and treated seeds .
Germinated seeds were subcultured on basal Murashige and Skoog medium solid at the same Nacl concentration . The roots growth was mor affected by 200 mM Nacl compared to seedling growth .
Plantlets were transfered into pots with nutrient soil , irrigated with saline water and were adapted at laboratory . we obtained good plants grew to maturity in 10- 12 weeks .
The objective of this study is to compare the effect of five different Nacl
concentration (0,50,100,150,200 mM) on seeds germination and seedling growth of two
cultivars of soybean (sb-44,sb-172).
Seeds were germinated in petri dishes with sterile
filter paper moistened with 10 ml
of test solution at 25 c˚ in dark .
The obtained results showed that germination percentage , length of root and
hypocotyl were decreased with the increase of the Nacl concentration in the medium. The
best values was from cultivar sb-44 .
After seven days of incubation , significant differences were observed between
control and treated seeds .
Germinated seeds were subcultured on basal Murashige and Skoog medium solid at
the same Nacl concentration . The roots growth was mor affected by 200 mM Nacl
compared to seedling growth .
Plantlets were transfered into pots with nutrient soil , irrigated with saline water and
were adapted at laboratory . we obtained good plants grew to maturity in 10- 12 weeks .
The aim of this study was to determine the best size and shape of containers to produce higher quality seedlings, and determine which treatments (moving the seedlings to other beds, or transfer to bigger containers, or pruning the shoot and root syst
em of Ceratonia siliqua seedlings in the nursery) are the best for growth and stabilization in out planting. The study showed that the control seedlings D1 which were growing in traditional plastic containers (1 liter) gave low survival rate which did not exceed 20%, and this was due to numerous reasons mainly roots deformation. Seedlings D8, the containers(2 liters) improved the morphological characteristics of root and shoot system and reduced the roots deformation, which led to higher survival rate reached more than 82%. While the deep containers and the air pruning improved the structure and spread the root system of seedlings D9 and limited the roots deformation, which led to higher survival ratio reached more than 95%. Moving the seedlings to other beds in the nursery improved the survival rate in out planting, which amounted ,in D2, to more than 95% and in D3 over than 67%. Also, the study confirmed that cutting the developing top of shoot system and leaving the seedlings in the beds until their planting date D4 did not give a significant effect compared to D5 in which the developing top of their shoot system was cut and was transferred to bags of (12 liters) with pruning the root system, and the survival rate was more than 72% in D4, and over 62% in D5. Regarding to survival rate under the influence of transport operations to larger bags, the D7 which was transferred to bags of 3 liters capacity surpassed in significant differences and was 77.5% compared to D5 and D6 which was transferred to 12 liters bags, where the survival rate in which was 62.5%.
