Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userEffect of Polyacrylamide on Gypsiferous Crust Strength, and Seedling Emergence
تأثير البولي أكريلاميد (Polyacrylamide) في قساوة القشرة الجبسية و بزوغ البادرات في الترب الجبسية
957
0 28
0
(
0
)
Added by
Damascus University ورقة بحثية
Publication date
2006
fields
Soil And Water
and research's language is
العربية
Created by
Shamra Editor
Ask ChatGPT about the research
درس تـأثير إضـافة البـولي اكريلاميـد (PAM) فـي إضـعاف قسـاوة القشـرة الجبسـية (Gypsiferouscrust) و رفع نسبة بزوغ البادرات فيها (emergence Seedling) ، كما درس تأثيرها في الرشح و كمية الجريان على ترب ذات احتواء مختلف من الجبس، وضعت التربة الجافة و المنخولة في أحواض من البلاستيك بسماكة 4 سم فوق طبقة من الرمل البحـري. ثـم أضـيفت البـوليمرات بمعـدل 20كغ/هكتار. عرضـت الأحـواض لشـدة مطريـة 45مـم/سـا باسـتخدام جهـاز محاكـاة المطـر (Rainfallsimulator) . و في أثناء التعرض للمطر جرى قياس الرشح و جريان المياه لتلك الترب. و بعد التعرض للمطر نقلت الأحواض إلى مختبر نظمت الحرارة فيه 25± 2م . أخذت قراءات رطوبـة التربـة، و قياســات قســاوة القشــرة (strength Crust) بوســاطة مســبار اختــراق التربــة (penetrometer Soil) ، و بزوغ البادرات و ذلك بشكل دوري حتى فقد 90 % من ماء التربة.
The effect of applying polyacrylamide polymer on soil crusting, seedling emergence, infiltration and runoff rates were studied on gypsiferous soils collected from the Euphrate Basin in Syria The boxes were exposed to the rainfall 45.48 mm/h using a rainfall simulator. Total runoff and infiltration measurements for all boxes were recorded. The boxes were then transferred to a temperature-controlled room (25±2 °C) for drying. Soil moisture content and crust strength were measured periodically until 90% water loss was recorded in the soil. Seedling emergence was also counted daily.
References used
Al Mekdad, G. (1997). Soil crusting and control of gypsum soil in Syria. M. Sc. thesis Wageningen. Univ. Holland
Ben-Hur, M., Faris, J. Malik, and Letey. J. (1989). Polymers as soil conditioners under consecutive irrigations and rainfall. Soil sci. Soc. Am. J. 53, 1173-1177
Ben-Hur, M. and Keren, R. (1997). Polymer effect on water infiltration and soil aggregation. Soil. Sci. Soc. Am. J., 61, 565-570
rate research
Read More
Background& Objective: The purpose of this study is to compare the anterior tooth size width in patients
with congenitally missing maxillary lateral incisors with the normal width size of the Syrian.
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 study was conducted at Tishreen University, where laboratory experiments were carried out in the laboratories of the Faculty of Agriculture - Department of Soil and Water Sciences, while artificial rain experiments were conducted in the Tishreen 16 Dam lake area.
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 .
Clayey expansive soils are fine grained soil with a low strength. Its
swelling potential and shear strength are significantly affected by
the water content.
This research aims to study the effect of the initial water content
on both shear strength and the required displacement to reach the
maximum strength.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
