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EVALUATION OF SOME YEMENI GRAPE CULTIVARS ACCORDING TO THEIR PROPAGATION, AND FRUIT MORPHOLOGICAL CHARACTERS AND CHEMICAL PROPERTIES Texto completo
2010
, F.A Al-Shawish
Study was conducted during 2008 - 2009 on five local grape cultivars: Gubery, Assemy, Aswed, Razeqi and Bayadh at the faculty of Agriculture–ThamarUniversity . Cultivars were collected from Rawdha and Bany Husheish area – Sana'a Governorate. Morphological and physical characters of berry were determined and the chemical analysis for juice was also assessed. Finally, cuttings were taken from all cultivars and cultivated at the nurs- ery. Data were collected and analyzed by SAS system according to the least significant difference at the probability level of 0.05 and the results showed that: Assemy cultivar gave the maximum value of berry weight of 8.5 g, whereas the lowest rate was for Razeqi cv. of 1.2 g. According to berry dimensions, berry length ranged between 1.6 - 2.6 cm and berry width 1.35-2.43 cm. Razeqi cv. gave the highest content of T.S.S (24.5%), whereas Gubery cv. contained the lowest value of 20.37%. pH value was between 3.98–4.77 and organic acids were between 0.35 -0.80%. Aswed cv. gave the highest rate of rooting percentage of 58% meanwhile, the lowest rate was found in the Razeqi cv. (6.75%).
Mostrar más [+] Menos [-]Wheat yield and antioxidant enzymes relationship under different soil water content
2010
Abdel-Kader, M.A. | Nour El-Din, N.A. | Fawzy, M.H. | Bechini, L.
The objectives of this study were to examine the relationship between wheat yield cultivars (Sakha 93 and Giza 168) and antioxidant enzymes such as catalase (CAT), superoxide dismutase (SOD), peroxidase (POD), ascorbate peroxidase (APX) and phenylalanine ammonia-lyase (PAL) activities under different soil water content i.e. low, moderate and high content by Irrination at 806/6 ETo (1280m'/fed.), by, 100% ETo (1600m'/fed.) and120% ETo (1920m'/fed.), respectively. Two lysimeter experiments were carried out in two successive seasons i.e. 2006/2007 and 2007/2008 to estimate wheat yield and one experiment in plastic bags carried out of the greenhouse to determine the antioxidant enzymes of 28 days wheat plant under three different soil water content i.e. providIng wheat seedlings with aforementioned treatment. Exposing wheat cuitivars i.e. Giza 186 or Sakha 93 to water stress by Irrigation at 80% ETo (1280 m3/fad.) exerted an increase in CAT, SOD, POD, APX and PAL over those irrigated at 100% ETo (1600 m'/fad.) or at 120% ETo (1920 m'/fad.), but the previous enzyme activities in the tissue of Saka.93 surpassed of that of Giza 168 cuitivar. spike weight and weight of 100 grain/plant of Sakha 93 cuitivar overcome that of Giza 168 at low soil moisture content (80% ETo), whereas opposite results were obtained at high and moderate water content (120% and 100% ETo) in the first growing season (2006/2007) and spike weight/plant in second growing season (2007/2008). There was a proportional relationship between increasing soil moisture content and grain yield/plant but the difference between moderate water content 100% ETo (1600 m'/fed.) and high water content 120% ETo (1920 m3/fed.) was not significant. Providing 28 days wheat plant with low water content, decreased wheat yield/plant and its attributes comparing with moderate water content for the two studied cuitivars. The current study indicates that Sakha 93 cultivar was the most tolerant cuitivar compared with Giza 168.
Mostrar más [+] Menos [-]Improvement properties of wheat flour using microwave
2010
Soliman, A.E.M.
\{ In view of balady bread in Egypt is considered as backbone in diets, accordingly, in this study wheat flour (82%) extraction treated by microwave at 2,4 and 6 minutes, that target to modify starch wheat flour by heating. The rheological properties were studied by using farinograph and extensograph apparatus. Falling number and amylose percent were determined. Balady bread samples were sensory evaluated and staling rate was evaluated. The wheat flour, crust and crumb layers of balady bread were examined by scanning electron micro scope (SEM). The results of farinograph indicated that, water absorption arrival time, dough development time and dough stability increased while dough weakening decreased in wheat flour treated by microwave compared with wheat flour untreated (control). The results of extensograph revealed that, dough extensibility, resistance to extension and dough energy increased while proportional number decreased in wheat flour treated by microwave compared with control. Falling number decreased while amylose percent increased when microwave treatment increased from 2 to 6 minutes. Sensory evaluation showed slight decrease in values of both color crust and color crumb while, values of both taste and flavor slightly increased but not significantly different, meanwhile, values of crumb distribution significantly increased in balady bread samples prepared from wheat flour treated by microwave compared with balady bread prepared from untreated wheat flour (control). Wheat flour treated by microwave led to delay staling of balady bread and imilorated freshness of balady bread. The examination by scanning electron microscope (SEM) showed that average size of starch granules increased from 26.10 µm in untreated wheat flour (control) to 29.37 µm in treated wheat flour by microwave at 6 minutes.
Mostrar más [+] Menos [-]Effect of gibberellic acid on the persistance of certain pesticides onion grape fruits
2010
Ahmed, N.S. | Zidan, Z.H. | El-Sayed, W. | Abdel-Hamid, R.M.
Recommended application was done by spray regime for two pesticides, namely diniconazole, fenitrothion and a plant growth regulator (gibberellic acid) and their mixtures. Their residues were determined after different successive treatments in and on grape fruits in two consecutive years. The initial deposits of the fungicide diniconazole when used alone were 0.49 and 0.50 ppm for 2006 and 2007, respectively. While the initial deposits of fenitrothion reached to 11.35 and 11.19 ppm for the same interval, respectively. Initial deposits of the plant growth regulator gibberellic acid were 30.52 and 30.42 ppm for the same period, respectively. After mixing the tested pesticides and the plant growth regulator, the initial deposits loss reached 38.77 and 42.0 % for diniconazole, 43.08 and 48.16 % for fenitrothion and 6.88 and 7.00 % for gibberellic acid for the same seasons, respectively. A significant degradation was recorded with the mixture of the two tested pesticides and plant growth regulator compared with that occurred when pesticide was used alone at' the two studied seasons.
Mostrar más [+] Menos [-]Evaluation of some Yemeni grape cultivars according to their propagation, and fruit morphological characters and chemical properties
2010
Al-Shawish, F.A.
Study was conducted during 2008 - 2009 on five local grape cultivars: Gubery, Assemy, Aswed, Razeql and Bayadh at the faculty of AgricultureThamar University . Cultivars were collected from Rawdha and Bany Husheish area - Sana'a Governorate. Morphological and physical characters of berry were determined and the chemical analysis for juice was also assessed. Finally, cuttings were taken from all, cultivars and cultivated at the nurser.Data were collected and analyzed by SAS system according to the least significant difference at the probability level of 0.05 and the results showed that: Assemy cultivar gave the maximum value of berry weight of 8.5 g, whereas the lowest rate was for Razeqi cv. of 1.2 g. According to berry dimensions, berry length ranged between 1.6 - 2.6 cm and berry width 1.35-2.43 cm. Razeql cv. gave the highest content of T.S.S (24.5%), whereas Gubery cv. contained the lowest value of 20.37%. pH value was between 3.98-4.77 and organic acids were between 0.35 -0.80%. Aswed cv. gave the highest rate of rooting percentage of 58% meanwhile, the lowest rate was found In the Razeqi cv. (6.75).
Mostrar más [+] Menos [-]EFFICACY OF CHEMICAL AND BIOLOGICAL TREATMENTS FOR CONTROLLING SOIL-BORNE PATHOGENS OF SOYBEAN Texto completo
2009
Ahmed Awad Altalb
Several soil-borne fungal pathogens attack soybean plants, causing seedling damping-off and root rot diseases, in Egypt. Isolation trials from rooted rots of soybean, collected from various locations at Gharbiya, Kafr El-Sheikh and Minufiya governorates, revealed that Rhizoctonia solani, Fusarium solani and Macrophomina phaseolina were the most virulent and predominant pathogens. All the tested fungicides significantly reduced linear growth of the tested pathogens. Three known bioagents i.e. Trichoderma harzianum, T. hamatum and Bacillus subtilis were tested against such pathogens, and revealed remarkable effect in reducing mycelial growth on PDA medium. T. hamatum, mainly, grew over the mycelium of the tested pathogens. Under greenhouse conditions, both the fungicides and antagonists gave significant reductions of root rot severity, but fungicides were more effective than biocontrol agents in reducing the disease. Application of the selective antagonists and fungicides significantly decreased soybean root rot than untreated check, in naturally pathogen- infested fields. Plant growth and activity of nitrogenase enzyme were enhanced greatly, when the fungicides were applied compared with antagonists treatments.
Mostrar más [+] Menos [-]EFFECT OF IRRIGATION WATER SALINITY LEVELS ON GROWTH, CHEM-ICAL COMPOSITION AND YIELD OF SOME NEW SWEET POTATO CULTI-VARS WHICH THEIR SOURCE IS TRUE SEEDS Texto completo
2009
Two pot experiments were carried out during the summer seasons of 2006 and 2007 to investigate the effect of irrigation with diluted saline water; i.e., 10, 30 and 50% in addition to Tap water as a control on growth, chemical composition, yield and tuber quality of three new sweet potato cultivars (Minufiya 6/96, Minufiya 2/96 and Minufiya 171/96) as well as the local cultivar (Mabrouka). The obtained results revealed that, saline water at 10 and 30% levels stimulated growth of sweet potato plants represented by plant height, number of leaves and branches, dry weight of shoots as well as the contents of photosynthetic pigments, proline, total carbohydrates, N, P, K+ and Ca++ in sweet potato leaves were also increased. Moreover, total water content (TWC), bound water (BW), bound / free water ratio (BW/FW) and relative water content (RWC) increased under these conditions. All these parameters decreased at the level of 50% salinity. Yield and its quality significantly increased at saline water at 10% level. Also, chemical composition of tuber roots; i.e., total carbohydrates, soluble sugars, carotene, starch and dry matter contents were enhanced under these conditions. All previous parameters decreased with increasing saline water up to 50%. Saline water levels increased Na+ content in the leaves. As for the tested cultivars, generally Minufiya 6/96 had the best growth and yield, was more stable in the chemical components and its roots had the highest nutrients value under the control and salt stress conditions, followed by Minufiya 2/96 then Minufiya 171/96. The tuber roots yield of Mabrouka cultivar was completely depressed at 30 and 50% salinity levels. As for interaction between cultivars and salinity levels. The highest level of salinity (50%) lead to a significant decrease in all growth parameters, RWC, TWC, bound water (BW), bound water / free water (BW/FW), chemical composition, yield and its quality in all new tested cultivars. While, Mabrouka cultivar showed a significant decrease in these parameters under the all salinity levels. Accordingly, Minufiya 6/96 was the highest tolerant to the tested salinity stress, followed by Minufiya 2/96 and Minufiya 171/96. On the other hand, Mabrouka cultivar sensitive to salinity.
Mostrar más [+] Menos [-]RESPONSE OF TWO SOYBEAN CULTIVARS AND THE ASSOCIATED WEEDS TO SOME AGRONOMIC FACTORS UNDER NEWLY RECLAIMED SOIL Texto completo
2009
Individual and integrated effects of three weed control treatments H [weedy control (H1); Butralin (H2) and manual twice hoeing (H3)] , three hill spacing , D [10 (D1), 15 (D2) and 20 cm (D3)] and two soybean varieties, V [ Giza 111 (V1) and Giza 21 (V2)] on dry matter (DM) of associated weeds, growth traits and parameters, nutrients uptake and seed yield, were the intended aim of the present study. To achieve this aim, split- split plot arrangement was used, where tested variables; H, D and V were allocated in main-, sub- and sub-sub plot, respectively, at newly reclaimed soil of the experimental farm "Demo" of Fac. Agric., Fayoum Univ., during 2006 and 2007 summer seasons. The obtained results could be summarized as follows: Dry weight of weeds were deppressed by twice manual hoeing, dense planting, chemical control and the interaction of H2D2V2 in the first sample and H3 V1 in the second sample.Maximum values of soybean height, number of branches, LA and LAI were obtained by H2 or H3 depending on the sample as well as the studied variety. Soybean density had a significant effect on plant growth (height, DM and LA). In addition CGR and NAR as well as N, P, and K were affected by H3 and H2. Several dual and triointeractions significantly affected the growth traits. Manual hoeing, H3 (1490 kg/fed) out yielded Butralin treatment, H2 (1000kg/fed) and both surpassed the weedy control one, H1 (530 kg/fed). Closest spacing, D1 (1080 kg) followed by intermediate one, D2 (1060 kg) produced markedly by higher seed yield/fed that of the widest spacing (890 kg). V2 (1080kg) out yielded V1 (940 kg/fed). H3 D1 (1840), D2 V2 (1500) and H3D2 (1260) as well as H3D1V2 (1890 kg/fed) were the most effective interactions on soybean yield. The obtained results revealed that, in such newly reclaimed land, the maximum yield with improved quality of soybean could be obtained from Giza 21 planted in closed spacing (10cm) and treated with manual hoeing twice.
Mostrar más [+] Menos [-]FACTORS AFFECTING THE (PRODUCTION OF EXTRACELLULAR NEUTRAL PROTEASE) BY STREPTOMYCES MICROFLAVUS Texto completo
2009
Saadia, M. Hassanein | Hala M. Rifaat | Osama Hamed El-Said | Souad A. Saleh | Manal S. M. Selim
In order to produce neutral protease from Streptomyces microflavus, it was cultivated in basal medium containing soluble starch, potassium nitrate, dipotassium hydrogen phosphate, magnesium sulphate, sodium chloride, calcium carbonate and ferrous sulphate. Protease production increased with decreasing the ratio of culture broth to vessel volume 1:5 and shaking at 150 rpm. Protease production was low when pH was < 5 or > 9. The productivity of protease decreased sharply when the incubation temperature increased from 30 to 450C. The maximum yield of protease was obtained at the third day of incubation. Soluble starch and yeast extract were the best carbon and nitrogen sources, respectively. Supplementation with calcium carbonate enhanced protease production. In addition, the dipotassium hydrogen phosphate was the best phosphorous source. Para chloromercuribenzoic acid and phenyl methylsulfonylfloride had significant inhibitory effect on protease production.
Mostrar más [+] Menos [-]SOME FACTORS AFFECTING THE SUSCEPTIBILITY OF FOUR STORED GARLIC CULTIVARS TO INFESTATION WITH CRYPTOBLABES GNIDIELLA MILLIERE Texto completo
2009
L.A. Youssef | M.S . Abdel-Wahaed | A.S. Kassab | M.M.E. Saleh
The honey dew moth Cryptoblabes gnidiella Milliere is one of the most important insect pests of stored garlic. Data revealed that, Egyptian (Baladi) cultivar was the least susceptible to attacke by this insect . After four months of storage, the infestation percentages were 21.68% for Egyptian (Balady) cultivar as compared to 32.39% for Sids 40, 44.88% for American and 70.99% for Chinese cultivar. The oil content of the four garlic cultivars were measured along four months of storage. Data showed that the four cultivars were differed significantly in this respect. The highest weight of volatile oils, 436.8 mg/100g was fined in the Egyptian cultivar whereas the Chinese cultivar had 340.6 mg/100g. The correlation coefficients “r” values showed highly significant and negative relationship between infestation percentages and volatile oils weight (mg) . The main components of the volatile oils of the tested four garlic cultivars were separated by GC- MS analysis. Nine sulfur compounds were separated and identified, the major compound was Diallyl trisulfide (i.e. 49.82, 46.23, 46.17 and 44.89%) for Egyptian, Sids 40, Chinese and American cultivars, respectively. Allyl methyl trisulfide ranged from 11.40 to 23.15%. On the other hand percentage of total soluble solids (TSS%) for the four cultivars were almost the same trend during the storage period extended for four months or slightly increased. These data indicate the importance of the type and quantity of volatile oils and its component in protection of stored garlic from infestation by C. gnidiella.
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