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EFFECT OF DIFFERENT CALCIUM CONCENTRATIONS IN SOIL ON SURVIVAL PERCENT AND UPTAKE OF Na+ AND Cl- IONS BY RICE PLANT Полный текст
2017
S Abouzied | Amal Abd El-latif
Salinity is a stress factor affecting the production of crop in many regions. Calcium can reduce Na+ transport to shoots in rice. Two greenhouse experiments were conducted in Faculty of Agriculture, Cairo University, Egypt, during 2015 growing season of rice to evaluate the effect of different calcium concentrations on survival percent along with uptake of Na+ and Cl- ions by two varieties of rice (Oryza sativa L.) differing in salt-tolerance. The first experiment was undertaken to study the effect of different calcium concentrations on survival percent of IR28 (salt-sensitive) and Nona Bokra (Salt-tolerant) seedlings which were transferred to salinized nutrient solution containing 0.5% NaCl and a variable calcium concentrations at 4, 40, 100 and 200 ppm; plants were grown up to 40 days. The second experiment investigated the effect of different calcium concentrations on growth, uptake and transport of Na+ and Cl- ions in the two rice varieties differing in salt-tolerance. The seedlings were transferred to salinized nutrient solution containing 0.5% NaCl and calcium ion concentrations at two levels, 4 and 40 ppm. Plants were harvested at 0, 1, 3, 5 and 7 days from salinization. The results indicated that the salt-tolerant variety (Nona Bokra) survived for more than 40 days under exposure to 0.5% NaCl when calcium concentration of the culture solution ranged from 40 to 200 ppm Ca++. The low calcium ion concentration (4 ppm) depressed the growth of plants at 5 and 7 days after salinization. In Nona Bokra, the shoot had less sodium and Cl than the root. This implies that the salt tolerance of Nona Bokra may be attributed to the restricted translocation of Na+ and Cl- from the root to the shoot. Sodium as well as cloride content in the shoot of IR28 was more than twice that of Nona Bokra. An adequate amount of Ca+2 tended to lower the salt injury caused by high levels of salinity in rice plants. The effect of calcium ion on salt tolerance varied greatly between Nona Bokra and IR28 varieties.
Показать больше [+] Меньше [-]EFFICIENCY OF CERTAIN INSECTICIDES AGAINST NYMPHS OF Bemisia tabaci (GENNADIUS) INFESTING CUCUMBER CULTIVARS UNDER DIFFERENT CLIMATIC CONDITIONS Полный текст
2017
Badiaa Abdel-Aziz | S. Dahroug | Y. Abdallah | M. Samir
Two experiments were carried out at the Central Laboratory for Agricultural Climate (CLAC), Agricultural Research Center and the Experimental Research Station attached to the Faculty of Agriculture, Ain shams Univ., Shalakan, Qalyubyia Governorate. The experiments were conducted for two summer seasons in 2015 and 2016 under unheated multi span plastic house and under open field conditions. Both experiments aimed at investigating the effect of certain weather conditions on the impact of three insecticides used for the control of the cotton whitefly, Bemisia tabaci (Gennadius) nymphs on four cucumber cultivars. The aims of the plastic house experiment and open field experiment were to investigate the impact of certain climatic conditions (Temperature (Co), Relative humidity (%) on different insecticides efficiencies used for whitefly control compared to untreated check (without any insecticide application). Lex (Dinotefuran) insecticide was the more effect on the nymphs of B.tabaci inside the plastic house or in the open field followed by Oshin (Thiamethoxam) insecticide. However Bernastar was the lowest efficiency. Concerning effect of climatic conditions, air temperature and relative humidity affected the performance of the three tested insecticides especially during the days with temperature over 35°C.
Показать больше [+] Меньше [-]EFFICIENCY OF EDTA ON ZN AND CU PHYTOREMEDIATION Полный текст
2017
Maram Mohammed | T. Mohammaden | S. Eisa | Kawthar Rabie
Phytoextraction of heavy metal from contaminated soils is promising remediation technology. In the present study, hyper-accumulator plants, indian mustard (Brassica juncea.( L) czern) and ryegrass (Lolium multiflorum Lam) have been used to remove the excess undesirable concentrations of zinc and copper from contaminated soil. Zinc and copper uptake have been enhanced by adding EDTA to the contaminated soil using two concentrations (2.5 and 7.5 mmol/Kg soil). Accumulation of Zn by the indian mustard shoots and roots under the effect of EDTA recorded 4 to 6 times as adsorbed by the control while less enhancement of Zn uptake was recorded by the ryegrass shoots and roots. On the other hand, Cu accumulation showed significant enhancing by the ryegrass shoot comparing to the indian mustard shoot at the both employed EDTA concentrations. The ryegrass roots gave enhanced Cu uptake at the EDTA conc. 7.5 mmol/Kg soil only while the indian mustard roots recorded an increasing in the Cu-uptake with the two EDTA concentrations
Показать больше [+] Меньше [-]EFFECT OF STRAIN, SEASON AND BREEDER'S AGE ON SOME PHYSIOLOGICAL PARAMETERS FOR LAYER DEAD EMBRYO Полный текст
2017
A. Abd El-Salam | Eman El-Daly | Y. Y.A. Hamouda | S. El-Safty | A El-Attar
The effect of breederʼs strain (Hy-line Brown and Hy-line White W36) flock aged (28, 36, 46, 55, 66 weeks of age) and breeding season on some physiological measurements in egg, demand organs, dead supply organs and lymphoid organs were examined. At each age, 10 unhatched eggs from each genotype were examined on embryo weight percentage, Chorioallotoic weight %, albumen pH %, yolk pH %, residual yolk %, pectoral muscles weight %, hatch muscles weight %, heart, liver, lunges, spleen, burse weight percentage. There was a significant difference between layer breeder genotypes for lunges weight percentage the brown was higher (0.84) than the white (0.62). The breeding season had a significant effect on heart, liver, lunges weight percentages in winter higher than summer but yolk pH and residual yolk the summer higher than the winter. Breeder's age significant effect on embryo weight percentage, Chorioallotoic weight %, albumen pH %, yolk pH%, residual yolk %, hatch muscles weight % heart, liver, lunges and burse weight percentage. It could be observed that the genetic differences among layer breeder strain and age of breeders can affect the hatchery performance. Additionally, handling of hatching eggs and incubation management can play a major role to overcome numerous hatching problems. In turn, increasing the production of table eggs and achieves the balance between supply and demand of that strategic commodity in Egyptian market.
Показать больше [+] Меньше [-]AN ECONOMIC STUDY OF THE CURRENT STATUS OF SUGAR CROPS IN EGYPT Полный текст
2017
M. Mileek
Sugar crops are considered to be the most important strategic food commodities, which attract the attention of decision-makers and producers who are concerned with the availability of supply in the markets, the deficit and the food gap. Sugar production depends on two crops in Egypt: sugarcane and sugar beet. A sugar gap due to the inability of the supply of domestic sugar to meet the demand for increased consumer needs, resulting in higher prices. The study aims to study the current situation of the production and consumption of sugar crops in Egypt and to estimate the food gap of sugar. Also, study the most important factors affecting the production and consumption of sugar crops in Egypt and the self-sufficiency rate. Of sugar The research was based on descriptive and quantitative analysis of the economic variables, the subject of the research to measure those variables and the research reached the following results. The cultivated area of sugar cane and sugar beet has taken an increasing general trend, which is estimated to be about 0.6, 37.7 thousand feddans annually, respectively, representing about 0.19%, 11.3% of the average during the period (2005- 2015) 324.3, 334.6 thousand acres, respectively. The total production of cane sugar has taken a general trend is decreasing, and did not confirm the statistical model, that is, there is relative stability length of study. The production of sugar beet crop has taken an increasing trend, which is estimated at about 810.8 thousand tons annually, representing about 11.6% of the annual average and estimated at 7002 thousand tons. The total amount of sugar produced from both sugar cane and sugar beets has taken an increasing general trend, and did not confirm the statistical significance, that is, there is relative stability throughout the study period. The food gap of sugar amounted to about 50.35 thousand tons, representing about 1.71% of the average national consumption of sugar, which amounted to 2937 thousand tons during the same period. Self-sufficiency rate of sugar amounted to about 63%, has taken a general trend decreases, and did not confirm the statistical significance, there is relative stability length of the study period. The study of the most important factors affecting the production of cane and sugar beet separately showed the existence of a positive relationship between the total production of each crop separately and the area and productivity of each crop separately, respectively. Study the factors affecting the consumption of sugar during the period of research shows the existence of a positive relationship between national consumption of sugar and the income of the consumer per pound / per year, local production of sugar per thousand tons, and the monetary value to support sugar per million pounds, and the opposite of the amount of national consumption of sugar and the retail price of sugar per kilogram per kilogram and the average global price in dollars / ton.
Показать больше [+] Меньше [-]USE OF OKARA WASTE FOR ALGAE NUTRITION Полный текст
2017
Sheraz Kamal | A. El-Sayed | Amal Hassan | Hoida El-Shazly | Manar Ibrahim
Chlorella vulgaris belonging to Chlorophyta and Nannochloropsis oculata belonging to Chrythophytawere used in the currentstudy to evaluate whether their successive indoor growth using industrial food waste (okara) as a growth medium enriched with organic carbon and nitrogenThe basic nutrient solutions were BG-II for Chlorella, while F2 was used for Nannochloropsis growth. Okara was used in four concentrations ( 25 , 50 , 75 and 100% ) verses to control and based on its initial nitrogen content. Original waste was diluted by 4 fold of tape water prior inoculation. The investigated parameters were dry weigh (g.l-1); total chlorophyll (mg.l-1) and total carotenoids (mg.l-1). Maximum dry weight of Chlorella was obtained with 25% of okara waste. As for Nannochloropsis, a slight increase was observed with all okara concentrations used. Lower okara concentration (25%) enhanced chlorophyll accumulation by Chlorella vulgaris, while higher concentration (100%) reached the maximum with Nannochloropsis oculata. Completely opposite pattern was observed with total carotene.
Показать больше [+] Меньше [-]EVALUATION OF PRICE POLICY ON THE MOST IMPORTANT CEREAL CROP Полный текст
2016
Wafaa Eid | Shahira Ibrahim
The research aimed at studying current situation improvement for grain crops production to meet international and domestic demand needs regularly with stable prices and standard specification, through analysis and assessment Egyptian price policy for crops subject of study, using policy agricultural analysis matrix, partial equilibrium model, measuring the impact of government interference on producers, consumers, foreign trade and government revenue as a result of implementing specific policy, and the impact of this on input and output utilizing efficiency, and on economic welfare on society and government revenue for those crops. The study indicates that, from calculating nominal protection coefficient, there was implicit subsidy for producers in the first period (2008-2010). In the second period (2011-2013) the subsidy decreased, taxes are imposed, and there was implicit taxes in the form of negative protection against producers and decrease in the consumer's subsidy proportion. As a result of studying domestic resource cost for the study crops, it showed that, the value of coefficient less than one to rice, wheat, and maize. Which indicate to the ability of the current economy to save foreign currency through domestic production, which reflect competitive efficiency in rice international market. The study also indicates the excessive in government revenue at the second period for all study crops, meanwhile there was deficit in the foreign exchange for wheat and maize, this is due to the decreasing in the domestic supply and the increasing in domestic consumption in light of low domestic price relative to international price. While there has been a decline in foreign exchange loss for rice in second period to first period reached about 45% because of the closeness between domestic prices and international prices. The loss in producers surplus for wheat and maize increased because of increasing in cost to returns, meanwhile it showed a decrease in producer net loss in the second period to the first period 12% approximately for rice because of farm price increase to reach the international price, also consumer surplus obtained advantages in all study crops in the tow period of the study. The study showed that, impact of net economic loss was negative at the tow period of the study for wheat and maize with a decreasing rate reached about 43% for wheat and 55%for maize, in contrast the net economic loss was positive for rice with decreasing rate reached about 62% in the first period. The research concluded with the following recommendations: - Implementing fair price policy in it domestic price relative to international price for the study crops. - Reduction direct and indirect taxes imposed on producers in ratio of 6% for wheat and maize crops and with 7% for rice. - Subsidy imported and essential goods producers to diminishing consumers and producers net loss, to diminishing producers' burdens borne, and to provide foreign exchange to the stat. The need to provide economical and political stable atmosphere to the success of developing and prices policies in developing countries.
Показать больше [+] Меньше [-]SPRAYING SOME ORGANIC COMPOUNDS ON KING RUBY GRAPEVINES FOR POWDERY MILDEW RESISTANCE Полный текст
2016
Ansam Abd El-Rahman | Magda Mohamed | Howida Metwaly
This investigation was conducted for two successive seasons (2013 and 2014) in a private vineyard located at 64 Km of Cairo-Alexandria desert road to study the possibility of using organic products to reduce powdery mildew, which it is reflect in reducing yield and fruit quality of King Ruby grapevines. The chosen vines were ten-years-old, grown in a sandy loam soil, spaced at 1.5 X 3.0 meters apart and irrigated by the drip irrigation system, trained to bilateral cordon with spur pruning, and trellised by the "Y" shape system. The vines were pruned during the last week of January with bud load of (60buds/vine). Application of different biocontrol agents Trichoderma harziamum, Trichoderma viride, Bacillus subtilis as well as blight stop a commercial biocide which contains different isolates of Trichoderma forms in Arabic gum and potassium soap) were obtained kindly from central lab. of organic agriculture, ARC. Giza, in an attempt reduces powdery mildew of the plants. The results showed that all vital bioagents treatments significantly were reduced the powdery mildew disease compared with micron sulphur and control in both season. However, spraying mixture of Trichoderma harziamum + Trichoderma viride and blight stop gave the least disease incidence and severity which it is reflect to increase yield, achieve the best physical characteristics of bunches as well as improving the physical and chemical properties of berries.
Показать больше [+] Меньше [-]A STUDY OF SOME FACTORS AFFECTING THE DEGREE OF RURAL WOMEN IMPLEMENTATION PRACTICES RELATED TO FAMILY HEALTH Полный текст
2016
Eman Abu Kamar | Shafik M. | Samia Mahros
The present study aimed at identifying the degree of implementation of rural women to set technical recommendations related to health practices, determining of the relationship between the degree of implementation of the respondents to a set of recommendations for health practices and between independent variables studied, as well as to identifying the most important factors affecting the implementation of the respondents to these practices. To achieve the objectives of the study were selected village Hallaba and Kafr El-sabeel (famous as the village Hallaba) in Qalioub district of Qaliubiya as an area of geographic study, was chosen as a random sample howswives of the village, has reached the study sample strength (112) Researched represent 5% of the total number of housewives the families of the village, which arrived appreciation for the year 2014 (2236) family, has a questionnaire has been compiled against included many questions of like measure degree of the mothers for following of head of the household sample study of a group of technical recommendations for some rural family practices of health-related design (dependent variable), including the respect of the independent variables under study, it has lasted the test period the initial form of the questionnaire and field data collection nearly three months (April, May, June) 2015. And the current study used analytical approach through the use of a set of statistical methods in the field of data analysis, and consistent with the nature of this data, these methods have ranged from the beginning of the term, the arithmetic mean, standard deviation, simple correlation, multiple linear regression analysis. Results of statistical analysis has shown that the vast majority (83%) of heads of household were women with an executive level low and middle between the recommendations of some health practices, which refers to their need for more knowledge and change their behavior Altiv to those recommendations, and the results indicated the presence of correlation found between the degree of relationship implementation of the study sample and independent variables private sources to obtain the following health information: View health programs and health practices, the importance of health programs, TV, health unit, as variables shares (television, the importance of health programs) in the interpretation of contrast kidneys to the point of implementation of health practices by 52.4%, There is also a correlation found between the degree of implementation of the study sample the following personal, social and economic independent variables: the customs and traditions and folk legacies health practices, external openness relationship, the age of the surveyed, the economic level, as all of those four variables contributed by 72.1% in the interpretation of contrast kidneys to the point of implementation of health practices.
Показать больше [+] Меньше [-]CONCENTRATION OF SOME HEAVY METALS (Cr, Cd, Pb) IN VEGETABLE CROPS PLANTED GROUPS AT SITES ON THE COURSE OF THE ORONTES RIVER IN HAMA - SYRIA Полный текст
2016
Kassem A. | Baladieh R. | Al-Mohamad K.
Concentration of heavy metals (Pb-Cd-Cr) was determined, that’s most polluted environment and rivers in fourteen varieties of vegetables throughout two growing seasons (2013-2014 &2014-2015), belonging to the three groups of vegetables (leaves and tuber and fruits), and using atomic absorption device, where the samples were collected from six different locations in Hama, and close to the course of the Orontes River, which vary different in irrigation operations and source of irrigation water. Results of this study showed that no significant difference (P> 0.05) between the types of vegetable groups in the content of heavy elements at each locations seposatly. But it clearly showed the presence of very high significant differences (P <0.0001) in the contents of vegetables from heavy elements collected from sites, this effect is due to irrigation water. Also, the average concentration of cadmium was higher than the global natural concentrations in accordance with similar studies, the average lead, and chromium were lower than the averages of similar vegetables from other countries.
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