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Some Indicators of the Water Regime in Some Varieties Belonging to the Monarda didyma L. Genus in the Conditions of Tashkent (Uzbekistan)
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作者 Mamadalieva Vakhobjon Kizi Madina Rakhimova Tashkhanim 《American Journal of Plant Sciences》 CAS 2024年第5期374-386,共13页
In this article, the names of 3 varieties of Monarda didyma L., which are considered to be introduced species, some indicators of the water regime in the climatic conditions of Uzbekistan: the amount of water in the l... In this article, the names of 3 varieties of Monarda didyma L., which are considered to be introduced species, some indicators of the water regime in the climatic conditions of Uzbekistan: the amount of water in the leaves, water deficit, water storage capacity were studied in spring and summer, and seasonal changes were determined. According to these indicators of the water regime, the studied varieties belong to the labile water regime, high green mass (centner), seed yield (how many grams), resistance to diseases and pests have been determined, which shows that it is promising for introduction in the conditions of our republic. Therefore, it is recommended to breed these varieties in the foothills and hilly regions of Uzbekistan, where the amount of precipitation is more than 400 - 500 mm. 展开更多
关键词 Uzbekistan tashkent Monarda didyma Bergama Jar-Ptitsa Cambridge Scarlet Water Regime Water Quantity Water Shortage Water Storage Capacity Labile
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Seed Germination and Vegetative Propagation of Promising Decorative Lonicera tatarica L. (Caprifoliaceae Juss.), Introduced into the Tashkent Botanical Garden (Uzbekistan)
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作者 Sobitjon S. Nosirov Nargiza K. Rakhimova Asilbek Kh. Matismoilov 《American Journal of Plant Sciences》 CAS 2023年第4期496-505,共10页
Seed germination (in laboratory and field conditions) and vegetative reproduction (by cuttings) of a promising decorative species—Lonicera tatarica L. (Caprifoliaceae Juss.) was studied for the first time in the cond... Seed germination (in laboratory and field conditions) and vegetative reproduction (by cuttings) of a promising decorative species—Lonicera tatarica L. (Caprifoliaceae Juss.) was studied for the first time in the conditions of introduction of the Tashkent Botanical Garden of Uzbekistan. Thus, the optimal temperature for germination of L. tatarica seeds in laboratory conditions is +20°C + 22°C, at which germination was 73%. The germination rate of seeds sown in autumn in the field was 62%, and the germination rate of seeds sown in spring was 71%. It was noted that in greenhouse conditions at an air temperature of 20°C - 22°C and a relative humidity of 49% - 53%, the rootability of cuttings was 75%. It was revealed that the studied species adapted well to the conditions of introduction. Taking into account the effectiveness of vegetative reproduction of L. tatarica, it can be recommended for improving the aesthetic condition and landscaping of cities, landscaping and landscape design. 展开更多
关键词 Lonicera tatarica Introduction Promising DECORATIVE Seed Germination Vegetative Reproduction CUTTINGS tashkent Botanical Garden Uzbekistan
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Initial Stages of Ontogenesis of <i>Capparis spinosa</i>L. in the Conditions of the Tashkent Botanical Garden (Uzbekistan) 被引量:1
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作者 Gulizebo B. Vaisova Tashkhanim Rakhimova Anorjon Matkarimova 《American Journal of Plant Sciences》 2021年第11期1613-1623,共11页
The initial stages of the ontogenesis of <i>Capparis</i> <i>spinosa</i> L. (Capparidaceae) were studied for the first time in the conditions of the Tashkent Botanical Garden of the Republic of ... The initial stages of the ontogenesis of <i>Capparis</i> <i>spinosa</i> L. (Capparidaceae) were studied for the first time in the conditions of the Tashkent Botanical Garden of the Republic of Uzbekistan. In plants, the seed peel is very dense and hard. Therefore, in laboratory and field conditions, the germination of seeds is low. In natural conditions, the seeds of mature fruits do not germinate for a long time (4 - 5 years). The seeds after undergoing cold stratification gave positive results (70% - 80%). Also, information is given about the nature of the use of its useful properties in the national economy as both forage, medicinal, and honey-bearing use. Plants are quite resistant to xerothermic factors, parasites and diseases. <i>Capparis</i> <i>spinosa</i> is a very promising plant adapted to various environmental conditions and can be used for degraded pastures of desert and foothill regions of the Republic of Uzbekistan. 展开更多
关键词 Capparis spinosа ONTOGENESIS SEEDS Root FLOWER Fruit tashkent Uzbekistan
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Ontogenesis of the Form <i>Biota orientalis compacta</i>(Cupressaceae) in the Conditions of Introduction of the Tashkent Botanical Garden (Uzbekistan)
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作者 Eldor E. Temirov Tashkhanim T. Rakhimova 《American Journal of Plant Sciences》 2019年第7期1239-1247,共9页
The ontogenesis of the form Biota orientalis compacta (Cupressaceae) was first studied in the conditions of introduction of the Tashkent Botanical Garden. The passage of periods and stages of ontogenesis, full ripenin... The ontogenesis of the form Biota orientalis compacta (Cupressaceae) was first studied in the conditions of introduction of the Tashkent Botanical Garden. The passage of periods and stages of ontogenesis, full ripening of the cones, a high rate of growth and development, as well as high seed productivity are the main indicators of the success and prospects of the introduction of the form Biota orientalis compacta. The data obtained will serve as a theoretical basis for the agrotechnical development in landscaping. 展开更多
关键词 ONTOGENESIS BIOTA ORIENTALIS compacta INTRODUCTION tashkent Botanical Garden Uzbekistan
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The Anatomical Structure of Vegetative Organs <i>Lavandula officinalis</i>Chaix in the Introduction of Tashkent Botanical Garden
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作者 Durdona K. Fakhriddinova Tashkhanim R. Rakhimova +3 位作者 Feruza M. Dusmuratova Guljan M. Duschanova Sodikjon H. Abdinazarov Ismatjon N. Samadov 《American Journal of Plant Sciences》 2020年第4期578-588,共11页
The article presents the results of research carried out by light microscopy of the anatomical structure of vegetative organs (leaf, root and stem) Lavandula officinalis Chaix of the family Lamiaceae introduced into t... The article presents the results of research carried out by light microscopy of the anatomical structure of vegetative organs (leaf, root and stem) Lavandula officinalis Chaix of the family Lamiaceae introduced into the conditions of the Tashkent Botanical Garden of the Republic of Uzbekistan. Our studies have shown that the presence or absence of trichomes can serve as an informative sign. In L. officinalis trichomes are simple unicellular two-terminal;three-terminal and multi-terminal. Lavender leaf hairs accumulate essential oils under the cuticle of secreting cells, the cuticle are tightly attached to the membranes of the secretory cells due to the absence of excretion products. Based on the results of a study of the morphological and anatomical features of the leaf of L. officinalis, it has been established that the forms of covering hairs and essential oil glands are of diagnostic value. In the epidermal, palisade and cortex parenchymal cells of the vegetative organs, yellow-orange essential (lavender) oil is noted. Identified diagnostic features that can be used in taxonomy and can be used to identify plant materials can also be used to develop indicators of authenticity in this type of raw material. 展开更多
关键词 Anatomy Vegetative Organs INTRODUCTION L. OFFICINALIS tashkent BOTANICAL Garden
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Results of a Complex Estimation of Varieties of <i>Hibiscus syriacus</i>L. in the Conditions of Tashkent
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作者 Abdixofiz L. Rakhimov Shohista A. Samatova 《American Journal of Plant Sciences》 2021年第4期566-572,共7页
The article presents the results of variety studies on the decorative and economic-biological characteristics of </span><i><span style="font-family:Verdana;">Hibiscus syriacus</span>&... The article presents the results of variety studies on the decorative and economic-biological characteristics of </span><i><span style="font-family:Verdana;">Hibiscus syriacus</span></i><span style="font-family:Verdana;"> L. in the conditions of Tashkent. It is established that the soil and climatic conditions of Tashkent are quite favorable for the cultivation of Syrian hibiscus. As a result of a comprehensive assessment, the most promising, promising and fewer promising varieties were identified. It is noted that the most promising</span></span><span style="font-family:Verdana;">—</span><span style="font-family:""><span style="font-family:Verdana;">both forms and the </span><i><span style="font-family:Verdana;">Speciosus</span></i><span style="font-family:Verdana;"> variety are characterized by better adaptability. Promising varieties—</span><i><span style="font-family:Verdana;">Luce</span></i><span style="font-family:Verdana;">, </span><i><span style="font-family:Verdana;">Red Heart</span></i><span style="font-family:Verdana;">, </span><i><span style="font-family:Verdana;">Russian Violet</span></i><span style="font-family:Verdana;"> in a short time were able to adapt to </span><span style="font-family:Verdana;">new conditions, and were able to maintain their decorative and biological</span><span style="font-family:Verdana;"> qualities. </span><i><span style="font-family:Verdana;">Pink Flirt</span></i><span style="font-family:Verdana;">, </span><i><span style="font-family:Verdana;">Rubis</span></i><span style="font-family:Verdana;"> and </span><i><span style="font-family:Verdana;">Totus Albus</span></i><span style="font-family:Verdana;"> are among the less promising varieties. These varieties were introduced to Uzbekistan in recent years and have not yet been able to fully adapt. The Aphrodite variety, which is part of the group of less promising varieties, has not been able to sufficiently show decorative and economic and biological qualities for a long time. 展开更多
关键词 Hibiscus syriacus L. tashkent Climate Variety Estimation DECORATIVE Uzbekistan
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Vegetative Reproduction through Green Cuttings of the Introduced Form <i>Weigela florida</i>f. “<i>Bristol ruby</i>” (Caprifoliaceae) in the Conditions of the Tashkent Botanical Garden (Uzbekistan)
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作者 Dilovar A. Khamraeva Nargiza K. Rakhimova Eldor E. Temirov 《American Journal of Plant Sciences》 2021年第7期994-1001,共8页
For the first time, work was carried out on the vegetative reproduction of <i><span style="font-family:Verdana;">Weigela florida </span></i><span style="font-family:Verdana;&q... For the first time, work was carried out on the vegetative reproduction of <i><span style="font-family:Verdana;">Weigela florida </span></i><span style="font-family:Verdana;">f.</span><i> </i><span style="font-family:Verdana;">“</span><i><span style="font-family:Verdana;">Bristol Rubru</span></i><span style="font-family:Verdana;">” (Caprifoliaceae) was introduced into the Tashkent Botanical Garden (Uzbekistan) through green branches. As a result of the research conducted, it was noted that the vegetative reproduction possibil</span><span><span style="font-family:Verdana;">ities of the “</span><i><span style="font-family:Verdana;">Bristol Ruby</span></i><span style="font-family:Verdana;">” form of </span><i><span style="font-family:Verdana;">Weigela florida</span></i><span style="font-family:Verdana;"> were high. W</span></span><span style="font-family:Verdana;">hen placed on stimulants of two types (kornevin, heteroauxin), it became known that kornevin stimulants are effective in taking root. It was found that the effective way to multiply this form by green branches in a vegetative way—when placed on the stimulator of kornevin from the middle part of the rod, the indicators of root extraction of the cuttings were 93.3%, which is more effective than other options. When vegetative reproduction of this decorative form, it is recommended that the seedlings come to the standard state in 3 - 4 years and the root extraction indicators are high—this is its use as the second row shrubs in the case of growing on strongly saline soils in the conditions of Uzbekistan. The cultivation of green cuttings of the form in the fog showed that they are more effective than in the open ground.</span> 展开更多
关键词 Form Weigela florida f. Bristol Ruby (Caprifoliaceae) Vegetative Reproduction Green Shoots Growth Regulators Biologically Active Substances tashkent Botanical Garden Uzbekistan Introduction
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近40年来塔什干低涡活动特征的统计分析 被引量:17
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作者 秦贺 杨莲梅 张云惠 《高原气象》 CSCD 北大核心 2013年第4期1042-1049,共8页
利用1971—2010年NCEP/NCAR逐日再分析资料,根据塔什干低涡定义,分析了塔什干低涡的时空分布特征、移动路径及其对南疆天气的影响。结果表明:(1)1971—2010年,塔什干低涡过程平均每年出现7.95次,成熟期生命史平均为3.1天,4天以上的仅有1... 利用1971—2010年NCEP/NCAR逐日再分析资料,根据塔什干低涡定义,分析了塔什干低涡的时空分布特征、移动路径及其对南疆天气的影响。结果表明:(1)1971—2010年,塔什干低涡过程平均每年出现7.95次,成熟期生命史平均为3.1天,4天以上的仅有13.5%;(2)4—6月和9—10月是塔什干低涡活动的两个高峰期,其中5月出现次数最多,其次是10月和6月;(3)塔什干低涡频次的年代际变化呈抛物线型,1970-1980年代由78次增加到83次,之后逐渐减少,年低涡频次存在7年左右的显著振荡周期,同时具有13年的次振荡周期;(4)塔什干低涡活动有两个高频中心,分别位于67.5°E,40.0°N和72.5°E,35.0°N,移动路径以偏东方向为主,占84%,西退塔什干低涡仅有5.7%;造成南疆显著降水天气的塔什干低涡占其总数的23.3%,夏季此类低涡所占比例最高,达41.2%。 展开更多
关键词 塔什干低涡 时空分布 移动路径 新疆
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塔什干低涡天气系统自动识别方法的探讨 被引量:2
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作者 秦贺 张云惠 +1 位作者 黄秉光 杨莲梅 《沙漠与绿洲气象》 2014年第4期15-17,共3页
根据塔什干低涡的定义,利用NCEP/NCAR日平均再分析高度场、温度场资料,运用计算机编程自动识别、追踪塔什干低涡的中心位置、中心强度和持续时间,进而获取塔什干低涡天气过程的数据集。此计算机识别程序中有两个关键判断条件:一是某格点... 根据塔什干低涡的定义,利用NCEP/NCAR日平均再分析高度场、温度场资料,运用计算机编程自动识别、追踪塔什干低涡的中心位置、中心强度和持续时间,进而获取塔什干低涡天气过程的数据集。此计算机识别程序中有两个关键判断条件:一是某格点i的高度值小于其外围格点高度值,二是低涡范围内任意格点的纬向温度二阶导数大于零。实践证明该方法对塔什干低涡系统的识别准确且省时省力,同时避免了人工挑选的主观性误差。 展开更多
关键词 自动识别 塔什干低涡 新疆
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Comparative Anatomical Structure of the Leaf of <i>Allium suworowii</i>Regel (Amaryllidaceae) in Different Ecological Conditions 被引量:2
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作者 Dildora M. Yusupova 《American Journal of Plant Sciences》 2018年第13期2676-2683,共8页
First studied the anatomy of the leaf Allium suworowii in different ecological conditions: Jizzakh region and the Tashkent Botanical Garden named after academician F.N. Rusanov at the Institute of Botany of the Academ... First studied the anatomy of the leaf Allium suworowii in different ecological conditions: Jizzakh region and the Tashkent Botanical Garden named after academician F.N. Rusanov at the Institute of Botany of the Academy of Sciences of the Republic of Uzbekistan. Identifying diagnostic signs of the leaf and determining a different combination of xeromorphic and mesomorphic features ensure adaptation to habitat conditions. Under the conditions that nature mesomorphic signs predominate, and introduction-xeromorphic signs prevail, this indicates that they are adapted to the conditions of introduction of this species. 展开更多
关键词 Anatomy LEAF ALLIUM suworowii Jizzakh Region Introduction tashkent BOTANICAL Garden Uzbekistan
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Structural Features of the Vegetative Organs of <i>Allium praemixtum</i>Vved. in Different Ecological Conditions
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作者 Akida T. Abdullaeva Guljan M. Duschanova Muhabbat H. Ravshanova 《American Journal of Plant Sciences》 2019年第4期536-544,共9页
Central Asia is one of the main centers of origin of bulbous geophytes, including the family Amaryllidaceae Juss. The anatomical features of many endemic, red-book bulbous geophytes are still poorly understood. The ar... Central Asia is one of the main centers of origin of bulbous geophytes, including the family Amaryllidaceae Juss. The anatomical features of many endemic, red-book bulbous geophytes are still poorly understood. The article presents the results of a structural study of the inflated part of the stem (fistular), stem and pedicels of an endemic A. praemixtum species grow in two different environmental conditions in the Aktau mountain Nurata Range (Uzbekistan, Province Navoi) and in the conditions of introduction in the Tashkent Botanical Garden (Uzbekistan, Tashkent city). Diagnostic signs of vegetative organs were revealed and various combinations of xeromorphic and mesomorphic signs were determined. Comparative anatomical study of vegetative organs of A. praemixtum is of great theoretical and practical importance in relation to taxonomy and ecology. 展开更多
关键词 Anatomy VEGETATIVE ORGANS ALLIUM praemixtum Navoi Region Introduction tashkent BOTANICAL Garden Uzbekistan
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The Impact of Ecologic Factors on Growth and Development of Two Polygonatum Species
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作者 Saidahmat A. Omarov 《American Journal of Plant Sciences》 2019年第5期730-737,共8页
The research results of environment impact on growth and development of Polygonatum odoratum (Mill.) Druce and Polygonatum severtzowii Regel species are given in the article. The effect of light intensity, temperature... The research results of environment impact on growth and development of Polygonatum odoratum (Mill.) Druce and Polygonatum severtzowii Regel species are given in the article. The effect of light intensity, temperature and humidity factors was noted in the studied species. 展开更多
关键词 POLYGONATUM odoratum (Mill.) Druce POLYGONATUM severtzowii Regel Growth Development Environment FACTORS tashkent BOTANICAL GARDEN
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Adaptive Features of the Leaf of <i>Juno vicaria</i>(Vved.) T. Hall &Seisums in Different Ecological Conditions of Uzbekistan
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作者 Nargiza K. Rakhimova Guljan M. Duschanova +3 位作者 Sodikjon Kh. Abdinazarov Eldor E. Temirov Sobitjon S. Nosirov Ismat N. Samadov 《American Journal of Plant Sciences》 2019年第6期947-957,共11页
The anatomical structure of the leaf of the Central Asian endemic species of Juno vicaria, growing in two different ecological conditions (Baysun Mountains of Surkhandary region and Tashkent Botanical Garden of Uzbeki... The anatomical structure of the leaf of the Central Asian endemic species of Juno vicaria, growing in two different ecological conditions (Baysun Mountains of Surkhandary region and Tashkent Botanical Garden of Uzbekistan) was analyzed and diagnostic signs were determined. Also identified are adaptive mesomorphic and xeromorphic signs from an environmental point of view. A species that grows in natural habitat is dominated by more xeromorphic signs: a thickened outer wall of the epidermis;numerous epidermal, spongy cells;submerged stomata;small, multi-row sclerenchymal and collenchymal cells, which indicate a more xeromorphic and adaptability, as well as the wide distribution of this species to the natural growing conditions. In a species growing under the conditions of introduction of the Tashkent Botanical Garden, more mesomorphic features predominate: thin-walled, large, few epidermal, spongy cells;not immersed stomata;large non multi-row sclerenchymal and collenchymal cells, which show that the species is adapted to altered habitat conditions. 展开更多
关键词 ANATOMY LEAF J. vicaria Surkhandarya Region Baysun Mountains Introduction tashkent BOTANICAL Garden Uzbekistan
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Ontogenesis of Elytrigia trichophora (Link) Nevski in the Conditions of Uzbekistan (Biometric Indicators)
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作者 Valijon Mahmudov Azizbek Valijonovich Mahmudov Ozodbek Sultankulovich Abduraimov 《American Journal of Plant Sciences》 CAS 2022年第8期1090-1099,共10页
The article is devoted to the study of the biomorphological features of Elytrigia trichophora under conditions of introduction in the mountain semi-desert zone and the determination of their economic prospects for int... The article is devoted to the study of the biomorphological features of Elytrigia trichophora under conditions of introduction in the mountain semi-desert zone and the determination of their economic prospects for introduction into rainfed crops. The research results showed that, in the Tashkent area, the number of generative shoots is almost the same, but they are 30 - 31 cm long and the number of partial bushes is 4 - 5 more than in Chartak. The root system lengthens by 18 - 25 cm per year, and the number of roots of the first order in the third year of vegetation increases to 93.6 ± 2.31 pieces, they branch up to the III-IV order. The duration of medium-aged generative plants in the Chartak area is 5 - 6 years, and in the Tashkent area, it is 1 - 2 years longer. 展开更多
关键词 ONTOGENESIS Latent Virginile SEEDLINGS JUVENILE IMMATURE Generative Peri-ods CEREALS Chartak tashkent Elytrigia trichophora
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Comparative Study of the Anatomical Structure of Some Vegetative Organs <i>Allium caspium</i>(pall.) M. Bieb. and <i>Allium tschimganicum</i>B. Fedtsch. Ex Popov Growing in Natural Conditions of Uzbekistan
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作者 Akida T. Abdullaeva Nargiza K. Rakhimova +1 位作者 Guljan M. Duschanova Eldor E. Temirov 《American Journal of Plant Sciences》 2020年第9期1398-1404,共7页
The results of a comparative study of the structure of some vegetative organs of </span><i><span style="font-family:Verdana;">A</span></i><span style="font-family:Verdan... The results of a comparative study of the structure of some vegetative organs of </span><i><span style="font-family:Verdana;">A</span></i><span style="font-family:Verdana;">.</span><i> <span style="font-family:Verdana;">caspium</span></i><span style="font-family:Verdana;"> and </span><i><span style="font-family:Verdana;">A</span></i><span style="font-family:Verdana;">.</span><i> <span style="font-family:Verdana;">tschimganicum</span></i><span style="font-family:Verdana;"> growing in natural conditions in Uzbekistan are presented for the first time. During the study of the desert representative </span><i><span style="font-family:Verdana;">A</span></i><span style="font-family:Verdana;">.</span><i> <span style="font-family:Verdana;">caspium</span></i><span style="font-family:Verdana;">, the following diagnostic, structural features were revealed: ribbing of the peduncle and pedicel;thickening of the outer wall of the epidermis and wavy folding of the cuticle of the parenchymal-bundle type of structure</span><span><span style="font-family:Verdana;">;deep submergence of stomata: extensive core: </span><span style="font-family:Verdana;">thinness</span><span style="font-family:Verdana;"> of the crustal parenchyma, the presence of lactic acid in it;the presence of a highly </span><span style="font-family:Verdana;">sclerified</span> <span style="font-family:Verdana;">sclerinchymal</span><span style="font-family:Verdana;"> ring between the crustal parenchyma and the central cylinder: the vastness of the core and the presence of </span><span style="font-family:Verdana;">hydrocytic</span><span style="font-family:Verdana;"> cells in it, as well as the similarity of the structure of </span></span><span style="font-family:Verdana;">the stem and pedicel. In this species, a predominance of xeromorphic characters was noted, due to a tendency indicating </span><span style="font-family:Verdana;">xerophilization</span><span style="font-family:Verdana;"> and adaptation to desert conditions. In </span><i><span style="font-family:Verdana;">A</span></i><span style="font-family:Verdana;">.</span><i> <span style="font-family:Verdana;">tschimganicum</span></i><span style="font-family:Verdana;">, the following mesomorphic diagnostic structural features, opposite to the desert one, were also revealed: </span><span style="font-family:Verdana;">roundness</span><span style="font-family:Verdana;"> of the stem and pedicel, dense folding of the cuticle surface, the presence of lactates in the crustal parenchyma, weak thickening of the crustal parenchyma, and the presence of a weakly </span><span style="font-family:Verdana;">sclerized</span> <span style="font-family:Verdana;">sclerenchymal</span><span style="font-family:Verdana;"> ring in the central color parenchyma: </span><span style="font-family:Verdana;">parenchymal-bundle</span><span style="font-family:Verdana;"> type of structure, weak thickening of the outer wall of the epidermis and slightly waviness of the cuticle surface, the presence of lactic acid in the crustal parenchyma. Weak submergence of stomata, large-cell crustal parenchyma, extensive, large-cell, thin-walled, poorly </span><span style="font-family:Verdana;">sclerified</span><span style="font-family:Verdana;"> central cylinder, also similarity to the structure of the stem with pedicel, but the presence of a cavity in the stem. The predominance of mesomorphic traits in this endemic species indicat</span></span><span style="font-family:Verdana;">ed</span><span style="font-family:Verdana;"> more favorable</span><span style="font-family:""> </span><span style="font-family:Verdana;">mountain humid growing conditions w</span><span style="font-family:Verdana;">ere</span><span style="font-family:Verdana;"> noted. 展开更多
关键词 Anatomy Stem PEDICEL Allium caspium Allium tschimganicum Samarkand Region tashkent Region Uzbekistan
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Strong Consistency of the Spline-Estimation of Probabilities Density in Uniform Metric
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作者 Mukhammadjon S. Muminov Khaliq S. Soatov 《Open Journal of Statistics》 2016年第2期373-379,共7页
In the present paper as estimation of an unknown probability density of the spline-estimation is constructed, necessity and sufficiency conditions of strong consistency of the spline-estimation are given.
关键词 Strong Consistency Spline-Estimation Probability Density in Uniform Metric Uniform Metric Soatov Muminov tashkent University Institute of Mathematics
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南疆西部“5·21”极端大暴雨成因分析 被引量:33
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作者 杨霞 张云惠 +2 位作者 张超 于碧馨 牟欢 《沙漠与绿洲气象》 2020年第1期21-30,共10页
利用常规观测资料、区域自动站加密观测资料、NCEP/NCAR逐6 h 1°×1°的再分析资料和FY-2卫星逐时云顶亮温资料,分析2018年5月21日南疆西部极端大暴雨过程的成因。结果表明:100 hPa南亚高压双体型、500 hPa塔什干低涡与贝... 利用常规观测资料、区域自动站加密观测资料、NCEP/NCAR逐6 h 1°×1°的再分析资料和FY-2卫星逐时云顶亮温资料,分析2018年5月21日南疆西部极端大暴雨过程的成因。结果表明:100 hPa南亚高压双体型、500 hPa塔什干低涡与贝加尔湖附近低槽“东西夹攻”、低空偏东急流强,为此次大暴雨提供了有利的高低空天气系统配置。副热带西风急流与极锋急流形成的高空强辐散区,在大暴雨区上空与低空偏东风急流左前方强烈的气旋式辐合区叠加,有利于上升运动维持;大暴雨发生前4 h,2个垂直环流圈的上升气流在暴雨区中心上空汇合,使得上升运动进一步增强。极端大暴雨发生前南疆西部整层大气湿润,低层偏西气流与偏东急流在暴雨区中心附近形成强烈辐合,促进了南疆盆地水汽向暴雨区集中和汇聚,同时有利于地面中尺度系统的发展和加强。卫星云图上多个γ中尺度MCS的活动造成本次极端大暴雨,强降水发生在TBB梯度最大的区域,极端大暴雨开始前3 h TBB下降超过30℃,与我国中东部地区局地暴雨发生前TBB的变化特征相似。 展开更多
关键词 极端大暴雨 塔什干低涡 低空偏东急流 南疆西部
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基于遥感数据的塔什干市城市扩展时空特征分析 被引量:7
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作者 阿里木江.卡斯木 阿斯耶姆.图尔迪 《新疆师范大学学报(自然科学版)》 2012年第2期1-6,共6页
随着城市化进程的快速推进,中亚城市化的发展成为近些年来该领域关注的新的研究重点。以中亚第二大城市一塔什干市1989、2000、2010年的遥感图像为数据源,获取塔什干市城市用地信息,并借助城市年均扩展速度、扩展强度指数及城市用地分... 随着城市化进程的快速推进,中亚城市化的发展成为近些年来该领域关注的新的研究重点。以中亚第二大城市一塔什干市1989、2000、2010年的遥感图像为数据源,获取塔什干市城市用地信息,并借助城市年均扩展速度、扩展强度指数及城市用地分形维数等参数,对塔什干市时空变化进行分析。结果表明:近21年来塔什干市的土地利用类型有明显的变化,其中建设用地的变化比较明显,呈现不断扩张的趋势,在1989-2000年期间平均扩展面积约为4.55km2/a,年扩展率为1.99%;2000-2010年平均扩展面积约为7.38km2/a,年扩展率为2.55%。其中增加的建设用地主要由周围的草地和未利用地转移而来;从分析可得:2000-2010年的扩展强度比1989-2000年的要高0.68%;分形维数逐渐增大,城市空间形态日益复杂化。 展开更多
关键词 城市扩展 遥感 时空特征 塔什干市
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新疆夏季两例塔什干低涡天气过程对比分析 被引量:2
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作者 李娜 秦贺 +2 位作者 李如琦 李伟 周雅蔓 《沙漠与绿洲气象》 2018年第6期8-15,共8页
利用NCEP1°×1°再分析资料,对新疆夏季两次塔什干低涡天气过程进行对比分析,从天气尺度环流系统配置、动力和水汽输送的角度探讨造成南疆不同降水强度的塔什干低涡特征差异。结果表明:当南亚高压中心位于70°E,南疆位... 利用NCEP1°×1°再分析资料,对新疆夏季两次塔什干低涡天气过程进行对比分析,从天气尺度环流系统配置、动力和水汽输送的角度探讨造成南疆不同降水强度的塔什干低涡特征差异。结果表明:当南亚高压中心位于70°E,南疆位于200 hPa急流轴出口辐散区,500 hPa塔什干低涡东移携带强西南气流时,700 hPa盆地有显著东风急流,偏西地区中低层切变辐合长时间维持,同时通过接力输送的阿拉伯海水汽与中低层东风急流携带的水汽强烈辐合,导致大范围暴雨,高层正MPV1、负MPV2向下伸展,中低层不稳定性、斜压性增强,配合700 hPa以下负MPV1、正MPV2激发垂直涡度增长,对流性降水加强;当南亚高压中心始终维持偏东(90°E),南疆位于200 hPa急流轴上,500 hPa里海脊和新疆东部高压脊势力相当时,塔什干低涡减弱为槽影响南疆,700 hPa南疆盆地东风气流弱且位置偏西,南疆地区无明显高层辐散、中低层切变辐合,不利于垂直上升运动的发展和水汽的集中辐合,难以造成显著降水。 展开更多
关键词 塔什干低涡 暴雨 对比分析 新疆
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在表面活性剂存在下使从牛至中提取精油最优化
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《国内外香化信息》 2002年第12期16-16,共1页
关键词 表面活性剂 牛至 精油 乌兹别可斯坦tashkent农场研究所
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