2024-03-29T06:42:46Z
https://ejoh.journals.ekb.eg/?_action=export&rf=summon&issue=524
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Efficacy of Hydrogen Peroxide on Postharvest Quality of White Button Mushroom
MUSHROOM quickly loses its quality due to susceptible to browning, degradation of composition and microbial spoilage after harvesting and during marketing. Hydrogen peroxide is classified as generally regarded as safe for use in food, fruits and vegetables. It could be used for its properties as a bleaching and antimicrobial agent. The quality evaluation was studied during storage of fresh white button mushroom (Agaricusbisporus). Mushrooms were immersed after harvesting in 1, 2 or 4% of hydrogen peroxide comparing to immerse in water (control). The results showed that hydrogen peroxide treatments were effective for keeping eating quality, nutritional value, sensory attributes and microbial safety during storage due to decrease the degradation in colour, composition and hardness as well as reducing weight loss and microbial load. At the end of storage period, 2% H2O2 decreased browning index by 45%, relative membrane permeability by 24% and weight loss by 15% compared to the control. Immersing mushrooms in 2% H2O2 also increased whiteness, dry matter, total soluble solids, protein and hardness. Lower molds and yeasts count by 23% and total bacterial count by 21% than the control were obtained. The sensory evaluation at the end of storage period indicated that 2% H2O2 treatment had better colour, texture and general acceptance than the control.
Agaricusbisporus
H2O2
Storage
colour
composition
weight loss
microbial activity
2016
06
30
1
17
https://ejoh.journals.ekb.eg/article_2821_e75a5bee49cd92a2d545945336e7d3b3.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Influence of Application Methods of Bio-Fertilization on Vegetative Growth, Seed Yield and Chemical Composition of Fenugreek Plants
THE FIELD work was carried out at the experimental farm "Demo" in faculty of Agriculture, Fayoum University, during two successive seasons of 2013/2014 and 2014/2015. The aim was to investigate the effect of foliar, ground application (soil drenching) and both the two methods using (0, 5, 10 and 15g/l) of bio-fertilization with yeast (Saccharomyces cerevisiae) on the growth, yield and chemical constituents of Fenugreek plants. The results assured that Fenugreek plants highly reacted positively and significantly to different methods of bio-fertilization with active dry yeast either by spraying or soil drenching or using both together. Using the highest concentrations (10 and 15 g/l) of yeast by spraying or soil drenching, as individually, or applying them together as interaction proved to have the leadership in enhancing and increasing all vegetative growth characters, plant height, branches number plant-1, fresh and dry weight plant-1, seed yield and its contents of mucilage (%), trigonelline, protein and chemical composition of Fenugreek plants, chlorophyll a, b, carotenoids, contents and total carbohydrates content.
Fenugreek plants should be sprayed and drenched at a concentration of 10 and 15 g/l of yeast. Moreover, active dry yeast should be more mechanized and used in agriculture as a harmless bio-fertilizer with a marvellous ability in increasing seed yield and chemical constituents.
bio-fertilization
Fenugreek (Trigonella foenum-graecum L.)
Active dry yeast (Saccharomyces cerevisiae)
Mucilage and Trigonelline
2016
06
30
19
33
https://ejoh.journals.ekb.eg/article_2822_5a32fe3462e39e5d4662a3e6884dd18c.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Effect of Salinity Stress on Slow- and Fast-Growing Festuca Grass Species
IMPROVING tolerance to salinity stress is a major challenge in many regions worldwide. In this study, the effect of salinity stress on slow- and fast-growing Festuca species was examined. Plants were exposed to 0, 50, 100 or 200 mM of NaCl for two weeks in a greenhouse using a hydroponic culture system. Shoot dry mass, water status, membrane stability were monitored as well as contents of proline, sodium, potassium, calcium, magnesium, nitrogen and phosphorus. Salinity stress had negative effects on shoot dry mass, water status, and membrane stability. Although fast-growing species had higher shoot dry mass, the slope of decreases were much higher in the fast-growing species. Slow-growing species showed greater accumulation of Na+, greater increases in ion leakage and Mg content and greater decreases in proline content. The results suggested that the interspecific differences among species in resistance to salinity stress associated mainly with tolerance ability to salinity stress rather than avoidance ability. The difference is due mainly to growth habits which is associated mainly with relative growth rate and leaf properties. Also, there was interference of Mg, but not Ca, on Na+ uptake by plant shoot, in addition to the important role of proline content in tolerance mechanism.
Festuca grass
Interspecific difference
Na+
proline
salinity stress
2016
06
30
35
45
https://ejoh.journals.ekb.eg/article_2824_14cdd938ad6d5e4e03d8e4920c33b414.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Effect of Inoculation With Bradyrhizobium sp., Va-mycorhiza and Mineral Fertilizers on Seed Production and Quality of Pea
THIS investigation was carried out at the experimental farm of Shandaweel, Agri. Res. Station, Sohag Governorate, Egypt, during 2012/2013 and 2013/2014 seasons, to study the effect of using Bradyrrhizobium sp and vesicular arbuscular mycorrhiza as an effective alternative for the chimical fertilizer, on the productivity of pea (Pisum sativum L.) seeds, Master B cultivar. The experimental designed as complete randomized block, with four replications.
Observations were made on days to 50% flowering, number of branches/ plant, stem length, number of pods/ plant, number of seeds/pod, 100 seeds weight, seed yield and seeds germination percentage. All the parameters were significantly influenced by inoculation with
Bradyrrhizobium sp and VA-mycorrhiza compared to control in both seasons. The highest values of number of branches/ plant, 100-seeds weight, seed yield (kg/fed.) and seed germination% were obtained under the treatments of Bradyrrhizobium sp and VA- mycorrhiza plus 15, 30 kg NP/fed. While, the lowest values of these traits were obtained under control treatment, in both studied seasons.
Pea- Bradyrrhizobium sp- VA-mycorrhiza
2016
06
30
47
61
https://ejoh.journals.ekb.eg/article_2825_7082bc89b96491216746b3dc3c4d2145.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Using Some Technical Operations For Improvement of Quality of King Ruby Grapes
THIS investigation was conducted for two successive seasons (2014 & 2015) on King Ruby cultivar in a private vineyard at El-deer village, Aga Center, Dakahlia Governorate, Egypt. The chosen vines were fifteen years old, planted in a clay soil under surface irrigation system, spaced at 2 x 3 m using spur pruning under bilateral cardon trellis method with supporting by double T system. This study was carried out to disclose the effect of manual thinning either removing one quarter of the clusters or removing the terminal quarter of the cluster solely after fruit set or in combination with leaf basal removal after fruit set or with trunk girdling at veraison stage.
The results showed that all conducted treatments were effective in improvement the quality of King Ruby grapes as compared with control. Although the vines for which the terminal quarter of the clusters is removed alone or in combination with leaf basal removal or girdling or with leaf basal removal and girdling decreased cluster weight as compared with the vines for which one quarter of the clusters is removed alone or in combination with leaf basal removal or girdling or with leaf basal removal and girdling but gave the highest yield and improved physical and chemical properties of berries such as berry weight, volume, length and width as well as SSC, SSC/acid ratio, total anthocyanin, total sugar, decreased total acidity in berry juice and decreased the percentage of shot berries /cluster.
The application of removing the terminal quarter of the clusters after fruit set in combination with leaf basal removal after fruit set and girdling at verasion stage gave the best values in yield and improved physical and chemical characteristics of berries.
grape
King Ruby
Manual thinning
Leaf basal removal and Girdling
2016
06
30
63
76
https://ejoh.journals.ekb.eg/article_2826_66babefb4814de24ba8ef62afc54bae4.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Use Efficiency of Cyanobacteria and Olive Vegetation Water (Cyano/Ovw) Biofertilizer for Olive Trees under Different Mineral Npk Levels
THIS STUDY was conducted during the two growing seasons of 2013 and 2014 on 13-year old Manzanillo olive trees cultivated at 5×8 m apart in sandy loam soil under standard cultural practices and drip irrigation in a private farm located at km 50 of Cairo-Alexandria road in the north west of Egypt to evaluate the effect of the bio-organic fertilizer Cyano/OVW, formulated from a successful cultivation of cyanobacteria mixed strains (Nostoc muscorum, Anabaena oryzae and Spirulina platensis) in 1:1 tap water-diluted of olive vegetation water (OVW), on some soil properties, growth parameters, mineral content, flowering, fruit set, yield and fruit quality. The bio-organic fertilizer (Cyano/OVW) was applied as soil drench or as foliar spray application methods. This study also highlighted the economic feasibility of these practices in improving fruit quality and crop yields. As soil drench application, Cyano/OVW was diluted with tap water (1:1) and added at the rates of 24, 36 and 48 liter/tree combined with three levels of 100, 75 and 50% of the recommended mineral NPK fertilizers. As for foliar spray application, constant volume of Cyano/OVW (1 liter/tree) was diluted with tap water (1:5) and sprayed from 4 directions (100%), 3 directions (75%) and 2 directions (50%) surrounding the trees which all received 100% of the recommended mineral NPK fertilizers. The control received the full dose of the recommended mineral NPK fertilizers only. Results revealed that all tested parameters i.e., soil biological and chemical properties, vegetative growth, fruit quality, fruit yield, fruit oil content, some physiological parameters and mineral contents of leaves were improved while, total phenolic compounds in soil and leaves were reduced in response to Cyano/OVW bio-organic fertilizer soil drench or foliar spray applications methods comparing with control. Application of foliar spray of 2 directions (50%) surrounding the trees + 100% of the recommended mineral fertilizers during the six months from January to June, twice each month was the most promising comparing with other treatments in improving soil moisture, growth, quality and productivity of Manzanillo olive trees fruits. This treatment would be recommended under this study and also under similar conditions as confirmed by the economic study.
Cyanobacteria
Olive Vegetation Water
Soil Drench
foliar spray
2016
06
30
77
107
https://ejoh.journals.ekb.eg/article_2828_91bdc80b63e7abb0267247db17a30c5c.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
The Promotive Effect of Different Concentrations of Marine Algae on Spinach Plants (Spinacia oleracea L.)
AFIELD experiments were carried out during the winter seasons ….. 2013/2014, 2014/2015 at the Experimental Station Farm of the Faculty of Agriculture, Alexandria University, at Abeis, Alex, governorate, A.R.E. to study the promotive effect of different concentrations of marine algae as biostimulantfertilization and mineral fertilization on growth and yield of Spinach, three of algae were applied in four rates (5%, 10%, 20% and 40%) and sprayed alone or in combination with others and recommended NPK as a control were applied . Plants were harvested after 50 days from planting and the characters were measured such as (plant height (cm), fresh and dry weights of leaves (%), total yield, total leaf's chlorophyll content, mineral contents of leaves and the accumulation of nitrate). All the tested treatments increased plant yield and quality in varying degrees. Ulva lactuca + Bread yeast 5% was the best treatment to increase the yield of Spinach plants in addition was recorded the lowest amount of nitrate in Spinach leaves. We can evaluate the effect of seaweed extract on nitrogen metabolism in root and leaves of Spinach plants cultivated in medium culture deficiency or richened of mineral elements.
algae
Biostimulant
nitrate content
Spinach
2016
06
30
109
122
https://ejoh.journals.ekb.eg/article_2830_dfa619215281f1cb15d6a236341be919.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Foliar Application of Some Amino Acids and Vitamins to Improve Growth, Physical and Chemical Properties of Flame Seedless Grapevines
THIS STUDY was carried out during two successive seasons ……(2014 & 2015) in a private vineyard at El-deer village, Aga, Dakahlia Governorate, Egypt. The experiment was conducted on 12-year-old Flame seedless grapevines cultivar. The vines were grown in clay soil under surface irrigation system, trained to quadrilateral cordon using Gable supporting system. Three amino acids namely Methionine, Glutamic acid and Argenine at a rate (500 ppm) were used as a spray application either alone or with Vitamin B1 (Thiamin) or Vitamin B2 (Riboflavin) at a rate (250 ppm) on the vines for three times at growth start (when shoots length reached about 40 - 50 cm), after fruit set and 2 weeks after fruit set as an attempts to improve growth, physical and chemical properties of Flame seedless grapevines.
The Results showed that single applications of amino acids or in combination with vitamins B1 or B2 were effective in improving shoot length, leaf surface area, total chlorophyll and total amino acids in the leaves in addition percentages of N, P, K and Mg in the leaves as well as enhancing yield per vine, cluster weight, berry weight, soluble solids content, total sugars, total anthocyanin and total phenols while reducing total acidity in berries as compared with control in both seasons of study. In this respect, applications of amino acids plus vitamins were superior to using amino acids alone.
The best results with regard to vegetative growth, yield/vine, fruit quality and net profit of Flame seedless grapevines were obtained when vines were sprayed with Argenine plus vitamin B2.
Grapevines
Flame seedless
Amino acids
methionine
glutamic acid
Argenine
Vitamins B1 and Vitamin B2
2016
06
30
123
136
https://ejoh.journals.ekb.eg/article_2831_2307b7f449116bcceecb3f48f1adc5a0.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Nitric Oxide, Oxalic Acid and Hydrogen Peroxide Treatments to Reduce Decay and Maintain Postharvest Quality of Valencia Orange Fruits During Cold Storage
THE EFFECTIVENESS of postharvest treatments of sodium nitroprusside (SNP), oxalic acid (OA) and hydrogen peroxide (H2O2) treatments and their combinations on postharvest quality and enzyme activity of ‘Valencia’ orange fruits were examined after harvest in season 2014 and 2015. The experiment were included the following treatments: distilled water (control), 1 mM SNP, 10 mM OA, 2% H2O2, 1 mM SNP + 10 mM OA, 1 mM SNP + 2% H2O2 and 10 mM OA + 2% H2O2 for 5 minutes. All treatments were stored at 8±1°C and 85-90% relative humidity (RH) followed by one week as a shelf life at ambient temperature 18-23°C and 55-65% RH for 15 weeks. All postharvst studied maintained postharvest quality of ‘Valencia’ oranges as compared to untreated fruits (control) during storage. Moreover, combined treatments were more effective than individual treatments. Treated ‘Valencia’ oranges with 1 mM SNP plus 10 mM OA or 2% H2O2 alleviated decay incidence and reduced weight loss percentage with an increase of marketable fruit percentage. In addition, these applications reduced the activities of polyphenol oxidase (PPO) and pectinase (PE) enzymes, while increased the activity of peroxidase (POX) enzyme. These treatments also decreased loss of firmness, hue angle, lightness values and juice content of fruits. In addition, these applications slowed the increase of soluble solids content (SSC) and SSC/TA ratio as well as decreased loss of titratable acidity (TA) and ascorbic acid contents during cold storage period followed by shelf life. Therefore, the use of postharvest treatments with 1 mM SNP in combination with 10 mM OA or 2% H2O2 have good potential strategy to improve the storability and reduce decay incidence as well as maintain postharvest quality of ‘Valencia’ oranges during cold storage.
oxalic acid
Sodium nitroprusside
Hydrogen Peroxide
‘Valencia’ orange
fruit quality
enzyme activity
2016
06
30
137
161
https://ejoh.journals.ekb.eg/article_2833_8264bb8f8fb38e54598be5c2b8a6c78f.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Evaluation of Some Mango Strains under Ismailia Governorate Condition
THIS INVESTIGATION was carried out during the two ……..successive seasons (2012 and 2013) on fourteen mango strains grown at Motreb Zahran orchard, Abu Sultan, Ismailia Governorate Egypt A.R.E. The studied trees were 16-year-old grown in sandy soil and irrigated with drip irrigation system. Flowering date, malformation percentage, date of fruit maturity, tree productivity and fruit quality were studied. Only three strains seem to be promising S9,S10 and S11) which they gave highest values of(productivity per tree, fruit weight, percentage of pulp weight and values of T.S.S. and lowest percentage of malformed panicles, seed weight and acidity. The evaluation indicated that, the strains as superiority can be arranged in a descending order as follows: S9, S11 and S10 may be recommended as a new superior mango cultivars.
Mongo
Evaluation
flowering
productivity
Fruit composition
fruit quality
Set percentage
2016
06
30
163
173
https://ejoh.journals.ekb.eg/article_2834_6515ab796e8dfe134df291cb8065910c.pdf
Egyptian Journal of Horticulture
1110-0206
1110-0206
2016
43
1
Pre-storage Application of Antioxidant Alleviates Chilling Injury and Maintains Quality of Valencia Orange Fruits Stored at Low Temperature
HE EFFECTS of postharvest antioxidant solutions on ……..quality of ‘Valencia’ orange fruits under cold storage were studied. Fruits were soaked for 10 minutes in a solution of distilled water (control), salicylic acid (SA) 2 mM, ascorbic acid (AsA) 12 mM, citric acid CA 20 mM, and their combinations. Fruits treated with these applications alone or in combination antioxidant solutions especially 2 mM SA plus 12 mM AsA or 20 mM CA alleviated chilling injury index symptoms, reduced fruit weight loss percentage and decay incidence as well as increased the marketable percentage as compared to untreated fruits. Moreover, these treatments decreased loss of firmness, hue angle, lightness values and juice content of fruits. Furthermore, these applications reduced the activities of polyphenol oxidase (PPO) and pectinase (PE) enzymes beside enhanced the activity of peroxidase (POX) enzyme. In addition, orange fruits treated with antioxidant solutions especially 2 mM SA in combination with 12 mM AsA had the highest fruit contents of titratable acidity (TA) and ascorbic acid (AsA) and had least soluble solids content (SSC) and SSC/TA ratio than control during cold storage at 5°C plus one week shelf life at ambient temperature.
antioxidant
salicylic
ascorbic
Citric
Orange
Chilling injury
fruit quality
2016
06
30
175
193
https://ejoh.journals.ekb.eg/article_2835_7b3dc01096a73c14af65e4a0276e4bc2.pdf