University of Tehran Press Desert 2008-0875 10 1 2005 12 01 THE STUDYOF PHYTOCHEMICAL CHARACTERS OF EROVSKIA ABROTANOIDES IN KASHAN 13 17 31877 10.22059/jdesert.2005.31877 EN H. Azarnivand Assistant Professor, Faculty of Natural Resources, University of Tehran M. Alikhah Asl P.hD Student , Faculty of Natural Resources, University of Tehran M. Jafari Professor, Faculty of Natural Resources, University of Tehran H. Dastmalchi Expert of International Research Center for Living With Desert , University of Tehran J. Safari Assistant Professor, Faculty of Chemistry, University of Kashan H. Joneidi Jafari MSc Student, Faculty of Natural Resources, University of Tehran Journal Article 2014 07 02 The studies conducted on plants grown in Kashan have showed the presence of abundant valuable industrial - medicinal plants. Unforlunately, a lot of these plants are removed as weed or grazed by livestock because of Lack of inhabitants' ignorance of their using and mismanagement. - Perovskia abrotanoides is of Lamiaceae family. The natural habitat of this plant is mostly near waterways, the beds and borders of seasonal rivers and mountainous ravines, namely the watersheds of south and southeast of Kashan .It is also seen in the borders of gardens and farms in these areas. This plant is mostly seen at the elevations 1500 - 2700 m. Its flowers, leaves and stems contain a lot of essence that can be used in medicine industry. In order to study this plant phytochemically, 6 areas (points) were selected. The average amount of plants' essence obtained from these 6 investigated areas was 4/5 cc(1/44%) in Ferizhend , 3/8 cc(1/1%)in Abyaneh, 2/8 cc(1/12%) in Chimeh, 219 cc(0/93%) in Ghohroud, 1/9 cc(0/61%) in Totmaj and 2/3 cc(O/74%) in Jahagh. Moreover determining the amount of existent essence in plant, we proceeded to find four plant materials: Saponin, Alkaloid, Tannin, Flavanoid. The amount of each material in plant was defined qualitatively in which the amount of saponin was considerable. https://jdesert.ut.ac.ir/article_31877_dbd0dc46b6b4ec9eb6080621e2f63a22.pdf

University of Tehran Press Desert 2008-0875 10 1 2005 12 01 DIURNAL BEHAVIOR OF LAND SURFACE TEMPERATURE IN LUT DESERT 19 28 31878 10.22059/jdesert.2005.31878 EN S. K. Alavipanah Associate Prof,Faculty of Geography,University of Tehran A. A. Shamsipour Ph.D. Canditate,Faculty of Geography,University of Tehran M. Jafer Beglo Associate Prof,Faculty of Geography.University of Tehran Journal Article 2014 07 02 analyses and thermal infrared channels 4 and 5 NOAA- AVHRR images. This research was carried out in Lut Desert located in center of sub-tropical divergence dominant in' Iranian plateau. The physical and thermal properties of the various desert surfaces have been determined using correlation relationships between the desert variables including: dark sand, normal sand, marl, saline soil, soil depth (10 cm), wet and dry bulb temperature in daytimes with the interval of two hours from 6 AM to 20 P.M within 15 days. The result shows that thermal conductivity, thermal capacity, physico-chemical properties of the studied materials and other thermal properties, are the most important factors affecting correlation coefficients. The highest correlation obtained around the sunrise (6 AM) and especially before and after the sunset (18, 20 P.M). Minimum correlations were obtained around the noon at soil depth and the best fitted models are linear for light sand and marl in 18, 20 P.M and non-linear for soil depth and marl in 18 P.M. Therefore it is generally concluded that the study of diurnal behavior of land surface temperatures might be useful for thermal image interpretation. https://jdesert.ut.ac.ir/article_31878_c9983db52a1a36f441f30c5412feff81.pdf

University of Tehran Press Desert 2008-0875 10 1 2005 12 01 INVESTIGATION OF SEED GERMINATION CHARACTERISTICS AND RECOVERY OF GERRMINATION IN THE HALOXYLON APHYLLUM UNDER DIFFERENT TEMPERATURE AND SALINITY CONDITIONS 29 35 31879 10.22059/jdesert.2005.31879 EN A. Shahbazi Scientific member of Agriculture Faculty,Islamic Azad University,Branch of Khorasgan K Nosrati PhD student, Faculty of Natural Sciences,University of Tehran G. R. Zehtabian Professor,University of Tehran Journal Article 2014 07 02 Haloxylon aphyllum is one of the most important species in sandy and saline areas in deserts, and some ecophysiology characters for viability in unfavorable condition have evaluated in this species. Seed germination is the critical stages in life cycle for species survival. In this study investigated salinity and temperature stresses on percentage and velocity of germination using six salinity treatments (0, 100, 200, 300, 400 and 500 mM/I NaCI) under four different temperature regimes (20:10, 30:10, 25:15 and 35:25 DC). The results showed that seeds could germinate at very high salt concentration (500mM). However, highest germination percentage was obtained in distilled water and thermoperiod 20:1cfc. Increased on salinity and temperature caused decreased of percentage and velocity of germination. Seed germinated rapidly and no significant change in germination was noticed after 10d. Recovery of seed germination investigated when seeds were transferred to distilled water. The results indicated that recovery percentage was high in seeds were transferred from very saline treatment with Lower temperature. https://jdesert.ut.ac.ir/article_31879_85441f3dc6b128995c432fd6bc955e62.pdf

University of Tehran Press Desert 2008-0875 10 1 2005 12 01 EVALUATION AND MAPPING OF DESERTIFICATION CONDITION IN FAKHRABAD- MEHRIZ REGION WITH THE ICD AND MICD MODELS 37 50 31880 10.22059/jdesert.2005.31880 EN H. Ahmadi Prof,of University of Tehran E. Abrisham M.Sc. In De-desertificaton M. R. Ekhtesasi Associate Professor , Faculty of Natural Resources.University of Yazd M. Jafari Professor,Faculty of Natural Resources , University of Tehran A. Golkarian M. Sc.In Watershed management Journal Article 2014 07 02 There are different models for mapping and evaluation of desertification condition, such as global FAO_UNEP model. There are also several models for evaluation of desertification in Iran. In this study, tow fol/owing methods was used: 1-ICD method, (Iranian Classification of Desertification). 2- MICD method, (Modified Iranian Classification of Desertification). In this research, at first, these models were considered and indices and factors were improved. Then, working unit map in this region was made by geomorphologic method and land use of each working unit was determined. This map has 14 working unit. At last, evaluation of desertification condition was determined in this region by ICD and MICD methods. The results methods were: - In ICD method, from an intensity of desertification point of view, Fakhrabad -Mhriz region is in low and medium classes. In this region the low class is about 82351 hectare (91.59%) and the medium class is about 7565 hectare (8.41%) of total area. In MICD method, this region has four classes of calm, low, medium and high. The calm class is about 33327 hectare (37.06%), low class is about 8346 hectare (9.28%), medium class is about 37245 hectare (41.42%) and high class is about 10998 hectare (12.23%). According the results of this investigation and by comparing them with the condition which have been observed in the Fkhrabad-Mehriz region, the MICD is better method for evaluation of desertification condition in this region. https://jdesert.ut.ac.ir/article_31880_965d47486f1c16941be439074e26a8ea.pdf

University of Tehran Press Desert 2008-0875 10 1 2005 12 01 THE APPROACH OF DESERTIFICATION MAPPING USING MEDALUS METHODOLOGY IN IRAN 51 60 31881 10.22059/jdesert.2005.31881 EN GH. R. Zehtabian Prof .of University of Tehran H. Ahmadi Prof. of University of Tehran H. Khosravi Former Graduated student of Natural Resoures Faculty , University of Tehran A. Rafiei Emam staff of Desert Research Division, Research Institute of Forests and Rangelands.Tehran.Iran Journal Article 2014 07 02 Desertification process as a great problem affects most of the countries in the world specially developing countries. This process has a high rate in arid and semi-arid countries such as Iran. The main objective of this research was to investigate land degradation status and desertification mapping of Kashan area. Different studies have been carried out in the world in order to assess desertification resulted in production of different regional models for their application in another region the indices should be re-investigated and adjusted to local conditions. So in this study, the newest method for assessment and ,mapping of desertification was used. The method was carried out by European Commission (EC) at the MEDALUS project and booked as ESAs in 1999. All indices of the model were revised before using, and regarding to the region condition these indices for land degradation were defined as key indices which were: hydrological index, wind erosion and climate index, and each index has some layers getting from their geometric mean. Method were parameterized and tested for Kashan area (91383 he) with dry climate. Thematic databases were integrated and elaborated by using a GIS and its spatial modeling function. Finally by means of all the above mentioned information land degradation mapping was provided. The area was presented as a present situation map of desertification on area. Among the total studying area about 29867 ha is, under average class, 3600 ha is high class and 24021 ha is under very high class desertification https://jdesert.ut.ac.ir/article_31881_7c4efe26c7e6c2d93325c0ff99bfa01a.pdf

University of Tehran Press Desert 2008-0875 10 1 2005 12 01 THE CLIMATIC FEASIBILITY OF SAFFRON CULTIVATION IN SOUTHERN PART OF SABZEVAR 61 75 31882 10.22059/jdesert.2005.31882 EN H. Mohammadi Associate Prof, of Faculty of Geography . University of Tehran M. Karimpour Reihan Assistant Prof, International Research Center for Living with DESERT Journal Article 2014 07 02 The correlation coefficient of climatic factors necessary for cultivation of saffron between Sabzevar stations and those of southem parts of Khorasan is strong. In October, no frost can be seen in Sabzevar, but it can be seen in other stations. This study showed that there was no difference in viewpoints of climatic factors in cultivation stations in both areas. Comparing the correlation coefficient of climatic factors in southem and central parts of Khorasan with Sabzevar ones, it can be said that cultivation of saffron in Sabzevar is possible. In all studied stations, all calculation factors showed high correlation coefficient (over 90%) showing temperature similarities in these areas with Sabzevar. Regarding to all studied climatic parameters, the highest correlation coefficient was related to the mean maximum temperature and the least was related to the absolute maximum temperature. Due to the high temperature in Sabzevar during the reproductive stage (phenology), the qualitative and quantitative of product is lower than product produced in southem parts of Khorasan. In Sabzevar, It is necessary for saffron to spent 25 days in order to receive daily energy. https://jdesert.ut.ac.ir/article_31882_678fd2ee36986874922a13e8d2197508.pdf