Toshpulot Fayzulloevich Rajabov

• Doctor of Philosophy
• Samarkand State University named after Sharof Rashidov

Soil water holding capacity is an important indicator of its ability to retain moisture and support plant growth. This study investigated the variation in water-holding capacity (WHC) characteristics of Artemisia diffusa, a common forage plant species, under different grazing intensities under livestock grazing conditions. Four intensities of lives...

Artemisia-dominated rangelands cover 15 million ha representing 65% of the total rangeland. At present, due to the extensive development of livestock husbandry and human pressure, the Artemisia ecosystems are facing an increasing anthropogenic strain. Understanding the ecophysiological behavior of these complex rangelands under various disturbance...

In the current article biomorphological (life form) analysis of relatively widespread higher plants in the composition of vegetation cover of Zirabulak low mountains were performed. Biomorphological analysis was ; conducted according to 1.G.Serebryakov's and K.Raunkier's classifications. According to the analysis, mono- and \ polycarpous grass spec...

Abstract In Uzbekistan, Artemisia-dominated rangelands cover 15 million ha representing 65% of the total rangeland area. At present, due to the extensive development of livestock husbandry and human pressure, Artemisia ecosystems are facing an increasing anthropogenic strain. Understanding the ecophysiological responses of these complex rangelands...

Аннотачия. Мазкур‖мақолада‖Ўзбекистон‖жануби-ғарбий‖қисмида‖жойлашган‖Қарнобшфл‖ѐйловлари‖фсимликлар‖қопламининг‖турлар‖таркиби‖ва‖умумий‖ер‖устки‖фитомассасининг‖боқилиш‖омили‖таъсиридаги‖миқдорий‖ва‖сифатий‖фзгариш‖хусусиѐтлари‖аниқланган.‖Илк‖маротаба‖шувоқ-эфемерли-эфемероидли‖ѐйловларнинг‖4‖та‖деградачиѐ‖даражалари‖ва‖2‖хил‖тупроқ‖шароитларига...

Изменение почвенных условий пустынных пастбищ под влиянием выпаса животных Ражабов Т.Ф.1, Ортиков Т.К.1, Рахимова Т.2, Валиев Ш.А.1, Абдурахмонов З.Ф.1, Аллаяров М.Х.1 1Самаркандский государственный университет, 2Институт ботаники Академии наук Республики Узбекистан, Ташкент Установлено, что бессистемный выпас скота на пастбищах полупустыни Карнабч...

ҚАРНОБЧЎЛ ЯЙЛОВ ЎСИМЛИКЛАР ҚОПЛАМИНИНГ ҲОЗИРГИ ФЛОРИСТИК ХИЛМА-ХИЛЛИГИ Т.Ф.Ражабов, Самарқанд давлат университети, Самарқанд Б.К.Мардонов, Самарқанд давлат университети, Самарқанд Т.Рахимова, ЎзР ФА Ботаника институти, Тошкент Ш.А.Валиев, Самарқанд давлат университети, Самарқанд Аннотация. Мақолада Қарнобчўл ярим чўли яйлов ўсимликлар қопламининг ҳ...

Tajikistan’s rangelands are mostly mountainous and consist of summer and winter pastures. Vegetation structure and composition in these diverse landscapes are generally influenced by environmental factors. The objective of this study was to assess the effects of aspect on vegetation characteristics of two mountainous pastures (summer and winter) ov...

Kristina N. Toderich, Shoaib Ismail, Ekaterina A. Juylova, Abdullo A. Rabbimov, Batyr B. Bekchanov, Elena V. Shyuskaya, Lilya, G. Gismatullina, Kozan Osamu and Toshpulat B. Radjabov The major factors and current trends of soil salinization and rangelands degradation in the arid/semiarid zones of Aral Sea Basin were discussed. The bioremediation of...

The article provides information on the state of natural pastures and methods for improving degraded pastures by overseeding perennial drought-resistant forage crops using resource-saving technologies adapted to the conditions of global climate change.

Consistent use of vegetation indices (VIs) for monitoring rangeland ecosystems in Middle Asia, and particularly Uzbekistan has been limited. In the face of intense rangeland degradation in Uzbekistan, understanding the applicability of VIs is an immediate priority for the assessment of the current state of these rangelands. This article focuses on...

Maqolada qizilqum hududidagi qumli cho'l yaylovlaridagi o'simliklar jamoalarida ro'y berayotgan ayrim fitosenotik ko'rsatgichlari, proyektiv qoplami, inqiroz darajalari, chorva mollarining meyoridan ortiq boqilishi va yetarlicha boqilmasligi natijasida ro'y beradigan o'zgarishlar va bular natijasida yaylovlarda shuvoq-efimerlarning biomassasi keski...

Desert annual plant species are valuable pasture forage and sources for restoration of degraded pastures. Examining the impact of environmental stresses on genetic diversity and population structure can identify species populations suitable for habitat restoration. We examined allozyme diversity and population structure of two annual species, halo-...

This paper describes the capability of remote sensing in the monitoring of rangeland vegetation productivities and dynamics in the foothill areas of Uzbekistan, in order to enhance the sustainable utilization of natural resources. Seasonal productivity, including above-ground biomass, density, coverage, foliar chlorophyll, and carotene content, was...

Globally pollinator diversity decreases due to habitat fragmentation, habitat loss and agricultural practices. Several climate change effects fuel the decline. The loss of pollinator diversity can significantly endanger food security, biodiversity and ecosystems. Pollinators have four key-functions, which make them indispensable for mankind: 87 out...

Rangeland degradation endangers livelihoods of many rural communities in Uzbekistan. Despite the threat of land deterioration from climate change, there are many reasons that land users do not take action to prevent or reduce land degradation. The described project uses a low-cost approach to mobilize stakeholders and initiate collective action. Ba...

The chapter describes briefly the two key land degradation problems faced by Uzbekistan (i) widespread loss of rangeland productivity and stability, including loss of biodiversity and invasion by unpalatable and/or invasive species and (ii) problems associated with rising saline water tables and land abandonment. Results of research on vegetation d...

The development of practical indicators of vegetation degradation is an important element in predicting and assessing rangeland health due to disturbances such as livestock grazing. Once established, phytoindicators provide a simple and visual operative way to diagnose active and possibly undesirable vegetation changes. This paper aimed to identify...

We examined the isotopic parameters in two C3 species (Artemisia diffusa H. Krasch and Tamarix hispida Willd.) and a C4 species [Haloxylon aphyllum (Minkw.) Iljin.] growing or planted in soils with different levels of salinity in a Central Asian desert. The oxygen isotope ratios of stem water (δ18Ostem) in T. hispida and H. aphyllum distributed in...

Salt-affected lands in the Central Asian region demonstrate the most characteristic features of natural continental terrestrial salinization, sodication, and alkalinization. Low organic matter (+ and \( {\rm{SO}}_{4}^{2-}\)are dominant ions. Total nitrogen and phosphorus ranged between 0.7–5.5 mg kg−1 and 10.0–18.26 mg kg−1, respectively. Available...

This chapter presents an analysis of contemporary status of rangelands, vegetation, and land use in Uzbekistan. Constraints to development include the climate and other physical conditions, but the socioeconomic and the policy environment are also barriers to adoption of better land management. The large rural population in remote areas is in subsi...

This paper considers how salt and drought tolerant C 3 /C 4 arid/semiarid plants in pure or mixed stands can control salinity, improve rangelands productivity and reverse desertification in Central Asian arid and semiarid zones. Spatial distribution of C 3 /C 4 photosynthetic types within different desert vegetation plant communities differs by sea...

Based on soil characteristics, watertable level, mineral composition of plant biomass, morphological/reproductive traits and carbon discrimination values, a new concept for the classification of halophytes was developed. Six main groups of halophytes have been described within the desert flora of Central Asia. Significant changes on chemical conten...

The major factors and current trends of soil salinization and rangelands degradation in the arid/ semiarid zones of Aral Sea Basin were discussed. The bioremediation of abandoned saline lands using natural marginal resources could be considered as one of a number of strategies that can be employed to bring these lands back to their full production...