Reda Rizk | Agricultural Research Center (Egypt) (original) (raw)

Papers by Reda Rizk

ISBN: 978-977-94-2870-3, 2022

Water resources …………………………………..………………………………………………………………..……………………….. Part II: Policy analysis ………... more Water resources …………………………………..………………………………………………………………..……………………….. Part II: Policy analysis …………………………………..…………………………………………………….……………………… Identifying the impact of different policy interventions on SRM and LDN Overview …………………………………..…………………………………………………………………………………….……………………. Animal production and importation policies effects ……………………………………………… Impact of stocking rate and overgrazing in the rangelands of the study area …………………………………..…………………………….……………………………………………………………………………………. Breeding and crossbreeding plans and their effects on the livestock sector …………………………………..…………………………………………………………………………………………….……………….. Marketing and transportation policies effects …………………………………..………….………….. Feed policy effects ……………………………………..………………………………………………………………………..………… Subsidy policy effects …………..……………………….…………………………………………………………………………….. Socioeconomic …………………………………..………………………………………………………………………………….……….. Urbanization …………………………………..………………………………………………………………………………………….………. Tourism …………………………………..……………………………………………………………………………………………………….……. Invasive plants …………………………………..……………………………………………………………………………………….…….. Analysing of the current policy framework …………………………………..………………………..……. Production sustainability and efficiency of the study area ……….………………………. Assess the strengths and weaknesses of the existing policy, legislation and rules related to SRM and LDN ……………………………………..……………………….……………………… Vegetation cover in the rangeland ……………………………………..……………………………………………… Legislations and regulations ……………………………………..……………………………………………………………..

Journal of Plant Production, Nov 1, 2005

espanolHasta hace poco no se contaba con un conjunto de descriptores de la palma datilera (Phoeni... more espanolHasta hace poco no se contaba con un conjunto de descriptores de la palma datilera (Phoenix dactylifera L.). Proponemos aqui un sistema de descriptores de la palma datilera que satisface las necesidades de los bancos de genes, las actividades de conservacion in situ y ex situ, y sirve para los estudios de diversidad. Se emplean sistemas multi-marca y bi-estado Para expresar las caracteristicas de la palma datilera. Hemos compilado los datos de un pasaporte estandar (17 parametros); detalles de eco-geografia (13 parametros), etno-botanica (15 parametros), ordenamiento (18 parametros), caracterizacion (58 parametros de partes verdes, 27 de frutos, 22 de semillas, 41 de inflorescencia, 4 de marcadores moleculares, 5 citologicos y 24 bioquimicos). Estos atributos se derivaron a partir de 1275 muestras que representan 55 variedades cultivadas en Egipto. Los datos de las caracteristicas se recogieron tanto de arboles que crecen en sus habitat naturales como de otros que crecen ex s...

and information obtained from the governmental agencies, economic statistics and the information ... more and information obtained from the governmental agencies, economic statistics and the information collected with the help of local community leaders as well as studies and literatures related to the scope of the study and in line with the study objectives. Data were collected during two field visits to the study area through direct communication with the stakeholders, in addition to visits for some livestock keepers, existing in the study area.

Journal of Applied Sciences, 2019

Global Advanced Research Journal of Agricultural Science, 2015

We report the discovery of the Balanites aegyptiaca (L.) Delile var. aegyptiaca in Qatar for the ... more We report the discovery of the Balanites aegyptiaca (L.) Delile var. aegyptiaca in Qatar for the first time. According to the national biodiversity reports and national and international literatures, there are no record for the species in Qatar. Also, its presence has not been detected either by locals or experts in Qatar before, although the species present in the Arabian Peninsula, Iran, and much of South Asia. We had discovered this species in Ar-Rayyan municipality at a location near Salwa road, 25 km from Doha, 90 km to Qatar–KSA borders (25°11'38.9"N 51°22'32.3"E). However, our findings highlights the need of a comprehensive survey around all Qatar, in order to document the presence of other plant species, and also to complete the catalogue of flora in Qatar.

Genetic Resources and Crop Evolution, 2012

The cultivated varieties and landraces of Cucurbitaceae growing in Egypt are presented, 27 taxa, ... more The cultivated varieties and landraces of Cucurbitaceae growing in Egypt are presented, 27 taxa, belonging to three genera, six species, and five subspecies. These characters are arranged according to their usefulness for identifications as follow: fruit characters, seed characters and trichome type. Fruit characters are a good taxonomic tool at varietal level when combined with the other vegetative characters. Two keys to 27 cultivated varieties of Cucurbitaceae (Cucumis, Cucurbita and Luffa) were constructed using the ...

Global Journal of Biotechnology & …, 2008

Seed morphs of Calendula officinalis were investigated in order to examine the genetic variabilit... more Seed morphs of Calendula officinalis were investigated in order to examine the genetic variability which correlates with seed polymorphism and its impact on collection strategy of gene banks. The basic parameters to get the evidence were obtained from morphological data, karyotype analysis, electrophoretic pattern of seed proteins as well as nucleic acid analysis. Seven seed morphs were observed from every inflorescence as follows: curve, winged, insect leg, balloon rough, balloon smooth, worm and open worm. All seed morphs were diploid, with thirty-two chromosomes observed in somatic cells. Karyotype studies showed that the seed forms have different karyotype formulae. However, the chromosome type nearly submetacentric (-) and nearly metacentric are representing in all karyotype formulae of all seed forms.Where as Nearly submetacentric (+) was represented in all forms except in both insect leg and balloon smooth forms and nearly subtelocentric (-) was represented only in the insect leg form. Not only the dissimilarity was found in the morphology of chromosomes but also in the mean chromosome length (MCL) and diploid chromosome length (DCL).The types and proportions of abnormalities observed at mitotic division were analysed. The electrophoretic analysis revealed the presence of eleven bands of molecular weight ranging from 70.50 to 15.00 KD. Four bands were common to all seed types: 35.00, 31.50, 21.00 and 20.00 KD. However, some bands were more restricted to particular seed types thus; band 70.50 KD was present only in winged and insect leg whereas 15.00 KD only found in open worm and worm. The nuclear DNA content was ranged from 0.007 mg/g to 0.013 mg/g, while RNA content from 2.257 mg/g to 17.662 mg/g. A compiling of all data recorded, cluster analysis was conducted to generate a dendrogram to show possible relationships among seven seed morphs of C. officinalis. The heteromorphic phenomena in C. officinalis might be due to genetic variations during the formation period of seeds. Seed morphs of balloon smooth and balloon rough as well as worm could be collected in the same accession. While seed morph of open worm and insect leg and winged could be collected as one accession. Seed morph curve has to be in separate accession in gene bank. It is recommended that seed polymorphism should be considered during collection mission for conservation of plant genetic resources in gene banks.

Jordan Journal of Natural History, 2021

Changes in social lifestyles and fruit diversity occur gradually at Saint Katherine. Saint Kather... more Changes in social lifestyles
and fruit diversity occur gradually at Saint
Katherine. Saint Katherine was more isolated
during the occupation period (1967-1982).
This study provides a significant and brief
description of the most important features
of the society study in Saint Katherine
concerning the effects of location and the
natural properties on the conservation of the
agrobiodiversity. The sources of horticulture
crop propagules are mainly from the local
nurseries as native breeds and/or from
nurseries outside the governorate. The study
recorded fifteen fruit crops in the horticulture
garden of Saint Katherine.The situational
factors impose some sort of separation or
isolation making that the exchange of genetic
assets for cultivated horticulture crops
limited. People had to use the existing genetic
resources or ones imported from abroad. So,
genetic resources of the cultivated crops
become adapted to the local environment.
After 1982, some cultivars were introduced
from an Agricultural Nursery. For such
reason, Saint Katherine is considered as
a unique store for specific fruit cultivars.
Horticulture crop diversity is also in decline
and continues to be threatened by drought,
climate change, habitat destruction, rainfloods, unsustainable use of natural resources,
and by the replacement of the native cultivars
with unsuitable new cultivars.

A Morphometric taxonomical study has been conducted on 52 date palm cultivars (Phoenix dactylifer... more A Morphometric taxonomical study has been conducted on 52 date palm cultivars (Phoenix dactylifera L.) including 21 soft, 10 semi-dry and 21 dry cultivars based on one hundred and three morphological characters. The date were analyzed using multivariate statistical methods, Unweigheted pair Group Arithemetic-average (UPGMA), Weighted Group-average Sorting (WPGMA) and Increment-in-sum of Squares Flexible Sorting (ISS). UPGMA, WPGMA and ISS were separated the 52 date palm cultivars to 7 soft, 6 dry and 1 semi-dry, as well as fused nineteen pair of date palm cultivars. The present study indicated that the used analytical methods (UPGMA, WPGMA and ISS) are suitable for classification of date palm cultivars.

Pakistan Journal of Biological Sciences, 2009

Genetic Resources and Crop Evolution, 2013

Egyptian Journal of Agricultural Economics, 19 (2) 624-639.

The threat of genetic erosion of date palm in Egypt is a result of low economic value of certain ... more The threat of genetic erosion of date palm in Egypt is a result of low economic value of certain cultivars. It could lead to extinction of many low economic value cultivars. A total of six cultivars were subjected to direct economic valuation viz. Sewi, Hayani, Zaghloul, Samani, Barhi and Medjool, to study the impact of economic value on the sustainability of date palm cultivars in Egypt. The benefit-cost ratio (BCR) is estimated by about 0.83 (Sewi), 0.37 (Hayani), 0.21 (Zaghloul), 0.04 (Samani), 5.75 (Barhi) and 8.42 (Medjool). The Production cost / the total return value reached about 0.55 (Sewi), 0.73 (Hayani), 0.82 (Zaghloul), 0.96 (Samani), 0.15 (Barhi) and 0.11 (Medjool). If the calculation of productivity value depends on fruit only, the payback period of date palm farms reached about 12 years for Sewi, 16 years for Hayani, 18 years for Zaghloul, 23 years for Samani, 8 years for Barhi and 8 years for Medjool. Meanwhile, if incorporate of fruit and offshoot value, the payback period is reduced to 10 years for Sewi, 13 years for Hayani, 16 years for Zaghloul, 20 years for Samani, 6 years for Barhi and 5 years for Medjool. From the economic point of view, the main problem of date palm production is the increasing of annual current cost and land rent (Lease), decline of fruit prices and neglect of value of secondary products of date palm. Instead of uprooting of low economic value cultivars of date palm and / or replacements by high economic value cultivars of date palm as well as alternative plant genetic resources, there are a number of policy options suggested to compact the date palm genetic erosion.

ISBN: 978-977-94-2870-3, 2022

Journal of Plant Production, Nov 1, 2005

Journal of Applied Sciences, 2019

Global Advanced Research Journal of Agricultural Science, 2015

Genetic Resources and Crop Evolution, 2012

Global Journal of Biotechnology & …, 2008

Jordan Journal of Natural History, 2021

Pakistan Journal of Biological Sciences, 2009

Genetic Resources and Crop Evolution, 2013

Egyptian Journal of Agricultural Economics, 19 (2) 624-639.

ISBN: 978-977-94-2871-0, 2022

يحتوي هذا الكتاب على السياسات والتداخالت المتعلقة باإلدارة المستدامة وتحييد تدهور المراعي. وهو ج... more يحتوي هذا الكتاب على السياسات والتداخالت المتعلقة باإلدارة المستدامة وتحييد تدهور
المراعي. وهو جزء من من مخرجات أنشطة تنفيذ المشروع الممول من برنامج األمم المتحدة
للبيئة ومرفق البيئة العالمية بعنوان "النظم البيئية السليمة لتنمية المراعي (HERD(
استراتيجيات وممارسات إدارة المراعي المستدامة". تم تنفيذ المشروع من قبل االتحاد الدولي
لحفظ الطبيعة (IUCN ، (من خالل مكتبه اإلقليمي في غرب آسيا (ROWA (مع شركاء في
مصر هما مركز بحوث الصحراء التابع لوزارة الزراعة واستصالح األراضي، ومركز البيئة
والتنمية للمنطقة العربية وأوروبا )سيداري(.
كان الغرض الرئيسي من المشروع هو تعزيز استعادة النظم البيئية للمراعي المتدهورة
وإحياء ممارسات الرعي المستدامة. بهدف رئيسي هو تطوير المراعي وحمايتها من خالل
اإلدارة الرعوية المستدامة. تم تنفيذ أنشطة المشروع في مصر في موقعين في محافظة مطروح ،
الموقع 1( أبو مزهود( يقع في الحدود االدارية لمركزي براني والنجيلة. بينما موقع 2( الجعوين(
بمركز مرسى مطروح.
ساهمت الدراسة في تعزيز مخرجات ونتائج الممارسات الجيدة والسياسات الفعالة في
اإلدارة المستدامة للمراعي وإعادة تأهيل المراعي وتحديد أولويات التنفيذ ووضع األنشطة
والتداخالت الالزمة.
هدفت الدراسة إلى تقديم مراجعة وتحليل متعمقين لسياسة الزراعة والمياه والحياة البرية
واألرض والحوكمة. وشملت أي ضا استراتيجيات حكومية شاملة، بما في ذلك برامج العمل
الوطنية لمكافحة التصحر، وخطط العمل الوطنية للتكيف، وخطط العمل الوطنية للتنوع
البيولوجي، والخطط الخاصة بالقطاعات ثم اقتراح السياسات والتداخالت الالزمة لتحقيق
االهداف المطلوبة

Policies and interventions related to sustainable rangeland management (SRM) & land degradation n... more Policies and interventions related to sustainable rangeland management (SRM) & land degradation neutrality In Egypt

Date palms are grown in most of the governorates of Egypt. God has blessed Egypt with different c... more Date palms are grown in most of the governorates of Egypt. God has blessed Egypt with different climatic conditions, and this is
reflected in the different cultivars dates. Date palms are grown all over Egypt from the Mediterranean coast in the north, to the border
with Sudan in the south; and from the Red Sea coast in the east, to Libya in the west. The diversity in climatic conditions in Egypt, led
to having varied cultivars of dates in the different governorates of Egypt such as Dry, Semi-dry, Soft dates.
Therefore, it was necessary to produce an Atlas of Egyptian date palms, and this was accomplished via the cooperation between
the Ministry of Agriculture and Land Reclamation and the Food and Agriculture Organization of the United Nations (FAO), through
its various projects one of which is the project on Date Palm Value Chain Development which is considered one of the outputs of the
National Plan for developing the Egyptian date sector as a first attempt to have Egypt get the ranking it deserves in the global market
being the first country in terms of production - 1.7 million tons from 15 million palm trees.
The Atlas of date palm in Egypt is an important and vital attempt for the date palm sector in the Arab Republic of Egypt to guide the
researcher, farmer, investor and manufacturer in the Egyptian dates sector about the most important types that has an added value in
terms of its use either in research programs or in the cultivation of export varieties, which enables the investor and the manufacturer to
invent new and varied products that cater to all tastes and age groups.
This Atlas also serves as an awareness tool to raise the Egyptian public’s interest in date palms and its various types, especially that
Egyptians are known for their passion for palms and its products especially dates. The Egyptian Government under the leadership of
His Excellency the President pays great attention to the date palm sector by planting 5 million palm trees in Toshka and the New Valley
governorate, which will result in gigantic changes in the global market over the next few years.

and information obtained from the governmental agencies, economic statistics and the information ... more and information obtained from the
governmental agencies, economic statistics and the information
collected with the help of local community leaders as well as studies
and literatures related to the scope of the study and in line with the
study objectives. Data were collected during two field visits to the
study area through direct communication with the stakeholders, in
addition to visits for some livestock keepers, existing in the study
area.