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Articles 1 - 30 of 52
Full-Text Articles in Life Sciences
Study On Transpiration Rates Of Vicia Villocea And Bromus Inermis Species, S. H. R. Sadeghi, N. Rahimzadeh
Study On Transpiration Rates Of Vicia Villocea And Bromus Inermis Species, S. H. R. Sadeghi, N. Rahimzadeh
IGC Proceedings (1997-2023)
Ecohydrology is concerned with the interaction between the hydrological and plant processes. Some aspects of the hydrologic cycle, such as transpiration and interception have received little attention owing to difficulties in field measurements. Quantifying the components of water balance for a watershed is crucial for understanding the dominant hydrologic processes occurring in a basin (Flerchinger & Cooley, 2000). Water use by vegetation is controlled by the water uptake by roots, the transfer of liquid water through plants and vapour loss from the leaf surfaces by the opening and closure of the stomata (Roberts, 2000) i.e. transpiration. Comparison of transpiration of …
Carbon Sequestration In Desertified Rangelands Of Hossein-Abad, Iran: A Participatory Approach, F. Amiraslani
Carbon Sequestration In Desertified Rangelands Of Hossein-Abad, Iran: A Participatory Approach, F. Amiraslani
IGC Proceedings (1997-2023)
The Hossein-abad (H.A) area is located in Southern Khorasan Province of Iran and covers some 148,000 ha. This is one of the poorest regions in the country and has a large area of degraded rangelands. Following a request from local people and in line with national and global goals, a carbon sequestration initiative has been funded by I.R.Iran and GEF(Global Environmental Facility) from April 2003. The objective is to promote and model carbon sequestration through developing range species in cooperation with local people and using a participatory approach. The immediate target beneficiaries are the people living in the project area …
The Role Of Proper Use Factor Model For The Prediction Of Available Forage In Rangeland In The South Of Iran, G. R. Badjian, I. Dahlan, M. Shahwahid H. O., A. A. Mehrabi
The Role Of Proper Use Factor Model For The Prediction Of Available Forage In Rangeland In The South Of Iran, G. R. Badjian, I. Dahlan, M. Shahwahid H. O., A. A. Mehrabi
IGC Proceedings (1997-2023)
In Iran, 80 to 90% of the livestock production is associated with rangeland but 48% of the rangeland has been classified as in poor condition (Farahpour, 2002). Available Forage (AF) is that portion of the forage production accessible for use by a specified kind or class of grazing animal. Estimates of AF by plant species, consumption by the animal, and the contribution of the forage to the animal's diet must be synchronised with each other in the same time frame (Valentine, 2001). The Proper Use Factor (PUF) is the degree of utilisation of current year's growth of the vegetation that, …
Comparison Of A Biometric Method With Clipping And Weighing Method For Estimating The Yield Of Artemisia Sieberi (Case Study Zarand-E-Save Region), H. Dianati, M. Abedi, E. Shahriary, Hossein Arzani
Comparison Of A Biometric Method With Clipping And Weighing Method For Estimating The Yield Of Artemisia Sieberi (Case Study Zarand-E-Save Region), H. Dianati, M. Abedi, E. Shahriary, Hossein Arzani
IGC Proceedings (1997-2023)
Forage production is a most important vegetation attribute in rangeland analysis and evaluation and use in management practices. Artemisia sieberi covered about 47% of the rangeland area in Iran and scientists need to know the best method for analysis and evaluation of this species. Clipping and weighing has high precision, but this method is time-consuming and expensive and alternative methods are required. Russian scientists developed a biometric method based on plant dimensions and suggest this method for rangelands in the Middle East (discussed by Dianati, 2003). In America, Muray (1982) used plant dimensions for yield estimation and regression models for …
Mineral Status Of Some Permanent Range Plants For Grazing Sheep In Semi-Arid Areas Of The Chaharmahal And Bakhtiari Province In Iran. 2. Trace Minerals, G. H. R. Shadnoush
Mineral Status Of Some Permanent Range Plants For Grazing Sheep In Semi-Arid Areas Of The Chaharmahal And Bakhtiari Province In Iran. 2. Trace Minerals, G. H. R. Shadnoush
IGC Proceedings (1997-2023)
The principal factors limiting the performance of grazing animals are low protein content of grasses, low energy intake due to high fibre content and mineral deficiencies or imbalances (McDowell, 1985). At least 26 mineral elements are required by at least one animal species (Church et al., 1988). These elements are generally required in small amounts. They have a great deal of importance for body tissue growth as well as for physiological functions. Mineral deficiencies and imbalances have been reported from almost all tropical regions of the world. This study was designed to measure the copper, iron, manganese and zinc …
Mineral Status Of Some Permanent Range Plants For Grazing Sheep In Semi-Arid Areas Of The Chaharmahal And Bakhtiari Province In Iran. 1. Some Macro Minerals, G. H. R. Shadnoush
Mineral Status Of Some Permanent Range Plants For Grazing Sheep In Semi-Arid Areas Of The Chaharmahal And Bakhtiari Province In Iran. 1. Some Macro Minerals, G. H. R. Shadnoush
IGC Proceedings (1997-2023)
A deficiency of one or more of the essential minerals in animals can lead not only to a decrease in productivity but also to metabolic diseases in case of severe deficiencies (McDowell, 1985). In general, mineral, especially phosphorous, deficiencies and imbalances are reported from almost all tropical regions of the world (Matijovic & Durackova, 1994). This study was designed to measure the calcium, phosphorous, magnesium, potassium, sodium and chlorine contents of some plant species in the semi-arid rangeland of Chaharmahal & Bakhtiari Province in Iran, because little information is available at present.
Ruminal Dry Matter, Neutral Detergent Fibre And Acid Detergent Fiber Degradation Kinetics Of Dominant Pasture Forages In Kurdestan Province Of Iran, A. A. Sadeghi, P. Shawrang, A. Nikkhah
Ruminal Dry Matter, Neutral Detergent Fibre And Acid Detergent Fiber Degradation Kinetics Of Dominant Pasture Forages In Kurdestan Province Of Iran, A. A. Sadeghi, P. Shawrang, A. Nikkhah
IGC Proceedings (1997-2023)
Neutral detergent fiber (NDF) is a major chemical component of forages and its degradability (dNDF) is an essential parameter in predicting their energetic value. Moreover, dNDF has been used in models to estimate the physical fill of fibrous feeds in the rumen and, therefore, the intake capacity of animals. As the available information on the nutritive value of pastoral forages is limited a study was undertaken to measure chemical composition and cell wall degradation kinetics of eight pasture forages in the rumen.
Factor Analysis Of Components Of Yield And Quality Traits In Lucerne (Medicago Sativa), A. A. Jafari, A. Ghamari Zare
Factor Analysis Of Components Of Yield And Quality Traits In Lucerne (Medicago Sativa), A. A. Jafari, A. Ghamari Zare
IGC Proceedings (1997-2023)
Lucerne (Medicago sativa) originated from Iran and is one of the most important forage species in this country. The improvement in yield and quality traits are important objectives in breeding programmes. Smith et al. (1997) indicated that in the context of dairy production ranked digestibility was the most important criterion whilst high crude protein and low fibre content were of moderate priority. This study sought to determine the dependence relationships between yield, morphological and quality traits in 64 genotypes.
Chemical Composition And Seasonal Yield Of Koeleria Cristata In West Azarbaijan Grasslands Of Iran, Javad Torkan, I. Bernosi
Chemical Composition And Seasonal Yield Of Koeleria Cristata In West Azarbaijan Grasslands Of Iran, Javad Torkan, I. Bernosi
IGC Proceedings (1997-2023)
No abstract provided.
Ranking The Counties In Ease Azarbaijan-Iran Based On Agriculture Development Criteria Using Copras Model, Razieh Pourdarbani, Asghar Pashazadeh
Ranking The Counties In Ease Azarbaijan-Iran Based On Agriculture Development Criteria Using Copras Model, Razieh Pourdarbani, Asghar Pashazadeh
Emirates Journal for Engineering Research
Understanding inequality and imbalances within different geographical areas (country, province and city), and policymaking to reduce inequalities are among the key tasks of the administrators in geographical development sector. Therefore, it is necessary to identify level of development and underdevelopment of agricultural areas in order to achieve sustainable agricultural development. A list of 36 indices including 10 agronomic indices, 7 horticultural indices, 8 livestock indices and 11 mechanization indices was prepared using Statistical Yearbook of 2016. The agricultural ranking of 21 counties was made using the Copras model. Also counties clustered using cluster analysis method included in SPSS software and …
Phenological Stages And Harvest Year On Forage Quality In West Azarbaijan Rangelands Of Iran, J. Torkan, H. Fajri
Phenological Stages And Harvest Year On Forage Quality In West Azarbaijan Rangelands Of Iran, J. Torkan, H. Fajri
IGC Proceedings (1997-2023)
No abstract provided.
Nomenclatural And Taxonomic Notes On Some Stachys Taxa (Lamiaceae), Özal Güner, P. Pablo Ferrer-Gallego
Nomenclatural And Taxonomic Notes On Some Stachys Taxa (Lamiaceae), Özal Güner, P. Pablo Ferrer-Gallego
Turkish Journal of Botany
Stachys glechomifolia (Lamiaceae), previously included under S. mardinensis as a synonym, is resurrected in this work based on extensive field and herbarium studies. In addition to its distribution in Turkey, S. mardinensis has firstly been recorded from Iran. Furthermore, the lectotypes of S. fragillima, S. graveolens, and S. kurdica var. brevidens are designated in this study. An expanded description and distribution map of S. glechomifolia, and some taxonomic notes on S. graveolens, S. fragillima, S. mardinensis, and S. nephrophylla are also reported.
Effects Of Grazing Intensity On Vegetation Cover And Soil Properties In Central Alborz, Hamid Jalilvand, Reza Tamartash, Mohammadreza Tatian, Golriz Hosainzadeh
Effects Of Grazing Intensity On Vegetation Cover And Soil Properties In Central Alborz, Hamid Jalilvand, Reza Tamartash, Mohammadreza Tatian, Golriz Hosainzadeh
IGC Proceedings (1997-2023)
No abstract provided.
The Effects Of Range Enclosure On Vegetation Composition And Density In Upland Grasslands Of Iran, Fazel Amiri, Hossein Arzani, M. Farahpour
The Effects Of Range Enclosure On Vegetation Composition And Density In Upland Grasslands Of Iran, Fazel Amiri, Hossein Arzani, M. Farahpour
IGC Proceedings (1997-2023)
No abstract provided.
The Study Of Changes Detection Of Land Covers In Zagros Mountain, West Of Iran, F. Karami, J. Oladi, S. Smailpoor Podeh
The Study Of Changes Detection Of Land Covers In Zagros Mountain, West Of Iran, F. Karami, J. Oladi, S. Smailpoor Podeh
IGC Proceedings (1997-2023)
No abstract provided.
The Investigation Of Vegetation On Marl Areas For Biological Controlling Of Water Erosion In Arid Lands (Case Study: Semnan Province, Iran), Naser Mashhadi, Majid Karimpour Reihan
The Investigation Of Vegetation On Marl Areas For Biological Controlling Of Water Erosion In Arid Lands (Case Study: Semnan Province, Iran), Naser Mashhadi, Majid Karimpour Reihan
IGC Proceedings (1997-2023)
No abstract provided.
Relation Between Vegetation And Soil In West Azarbaijan Rangelands Of Iran, J. Torkan, S. Gholinejad, A. Alijanpoor
Relation Between Vegetation And Soil In West Azarbaijan Rangelands Of Iran, J. Torkan, S. Gholinejad, A. Alijanpoor
IGC Proceedings (1997-2023)
No abstract provided.
Developing A Decision Support Tool For The Steppe Zone Of Ghom‐Iran, By Implementing A State And Transition Model Within A Bayesian Belief Network, H. Bashari, C. S. Smith, O. J. H. Bosch
Developing A Decision Support Tool For The Steppe Zone Of Ghom‐Iran, By Implementing A State And Transition Model Within A Bayesian Belief Network, H. Bashari, C. S. Smith, O. J. H. Bosch
IGC Proceedings (1997-2023)
No abstract provided.
A Model‐Based Approach For Mapping Rangeland Cover Using Landsat‐Tm Image Data, Majid Ajorlo, Ramdzani B. Abdullah
A Model‐Based Approach For Mapping Rangeland Cover Using Landsat‐Tm Image Data, Majid Ajorlo, Ramdzani B. Abdullah
IGC Proceedings (1997-2023)
No abstract provided.
Comparison Of Forage Quality Of Astragalus Effusus Bunge At Three Growth Stage, Management Systems, Gelavij Zamani Dadaneh, Ataollah Ebrahimi
Comparison Of Forage Quality Of Astragalus Effusus Bunge At Three Growth Stage, Management Systems, Gelavij Zamani Dadaneh, Ataollah Ebrahimi
IGC Proceedings (1997-2023)
No abstract provided.
Effects Of Livestock Grazing On Soil Moisture And Rangeland Vegetation Cover In Upland Grasslands Of Iran, Fazel Amiri, M. Farahpour, Sh. Fadai
Effects Of Livestock Grazing On Soil Moisture And Rangeland Vegetation Cover In Upland Grasslands Of Iran, Fazel Amiri, M. Farahpour, Sh. Fadai
IGC Proceedings (1997-2023)
No abstract provided.
Investigation The Improvement Operations Affections On Ecological Indexes Of Rangeland Health In Rangelands Of Golestan Province, Iran, Zeid Ahmadi, Mehdi Abedi, Gholam Ali Heshmati
Investigation The Improvement Operations Affections On Ecological Indexes Of Rangeland Health In Rangelands Of Golestan Province, Iran, Zeid Ahmadi, Mehdi Abedi, Gholam Ali Heshmati
IGC Proceedings (1997-2023)
No abstract provided.
Presentation Of Diversity, Life Forms And Chorology Of Plant Species In Rangelands Of Jahrom, Gh. Ghanbarian, E. Jafari, A. Hatami, M. Tayebi Khorrami
Presentation Of Diversity, Life Forms And Chorology Of Plant Species In Rangelands Of Jahrom, Gh. Ghanbarian, E. Jafari, A. Hatami, M. Tayebi Khorrami
IGC Proceedings (1997-2023)
No abstract provided.
Ordination Of Plant Communities At Nazlochai Basin In West Azarbaijan Rangelands Of Iran, J. Torkan, A. Alijanpoor
Ordination Of Plant Communities At Nazlochai Basin In West Azarbaijan Rangelands Of Iran, J. Torkan, A. Alijanpoor
IGC Proceedings (1997-2023)
No abstract provided.
Effects Of Livestock Grazing Intensity On Reproductive Changes In Festuca Ovina L., Somaye Alidoost, Masoume Amirkhani, Mousa Akbarlou, Mansour Mesdaghi
Effects Of Livestock Grazing Intensity On Reproductive Changes In Festuca Ovina L., Somaye Alidoost, Masoume Amirkhani, Mousa Akbarlou, Mansour Mesdaghi
IGC Proceedings (1997-2023)
Reproduction and re-generation strategies, whether by sexual or asexual means, are important attributes of grazed plants. The Gramineae family is the main element of rangelands, grasslands and grassland ecosystems by virtue of their seed production and distribution mechanisms, and their tolerance of environment stresses (cold, heat, drought). Festuca ovina is a highly palatable and productive plant that has been recommended for drilling and sowing in the steppe and semi-steppe rangelands of Iran. The aim of this study, which was located in the Ghorkhoud region in North-east Iran, was to investigate the effects of different grazing intensities on reproduction of this …
The Effect Of Exclosure Grazing On The Distribution Pattern Of Two Important Shrubs In The Central Steppe Of Iran, Anahita Rashtian
The Effect Of Exclosure Grazing On The Distribution Pattern Of Two Important Shrubs In The Central Steppe Of Iran, Anahita Rashtian
IGC Proceedings (1997-2023)
As part of a program to improve management of rangeands, research is being undertaken on the effects of grazing intensity on vegetation communities, including the response of different plant species to long-term exclosure from grazing. Species dispersion patterns can be used as valid indicators for condition assessment of rangeland ecosystems. Landsberg et al. (2002) and Riginos and Hoffman (2003) found that excessive grazing changed the structure and composition of plant communities, increasing the abundance of some species and reducing the presence of others. Heavy grazing leads to the excessive defoliation of herbaceous plants, reducing their biomass, basal cover and …
Forage Quality Indices Of Some Important Grass Species Of Iranian Rangelands, Hossein Arzani, Javad Motamedi, Mohammad Ali Zarechahouki
Forage Quality Indices Of Some Important Grass Species Of Iranian Rangelands, Hossein Arzani, Javad Motamedi, Mohammad Ali Zarechahouki
IGC Proceedings (1997-2023)
To be informed of the forage quality indices is one of the fundamental essentials for determination of the amount of forage sufficient for the daily requirements of animal in rangelands and wildlife habitats. This amount would be different depending on the vegetative composition and consequently the forage quality (Arzani, 2009). In this regard, grasses are considered one of the most important plants in the vegetative composition of rangelands in the country’s different climate zones that are grazed by the animals and meet a considerable amount of animal requirements (Arzani et al. 2010). Therefore, the values of forage quality indices …
Mineral Content In Some Species Of Leguminosae In Bandar Torkaman Plain Rangelands, Iran, Mohammadreza Tatian, Maedeh Yousefian, Reza Tamartash, Fatemeh Montazeri, Mehdi Jafari, Morteza Shaabani
Mineral Content In Some Species Of Leguminosae In Bandar Torkaman Plain Rangelands, Iran, Mohammadreza Tatian, Maedeh Yousefian, Reza Tamartash, Fatemeh Montazeri, Mehdi Jafari, Morteza Shaabani
IGC Proceedings (1997-2023)
Improving the forage quality and balance of their minerals in rangeland ecosystems is important for rangeland managers to improve livestock productivity (Mohamed et al. 2003; Epstein and Bloom 2005). This research investigated the amount of several minerals; Calcium (Ca), Phosphorus (P), Potassium (K) and Magnesium (Mg), in some important species of Leguminosae including Medicago sativa, Trifolium repens, Trifolium pratense and Lathyrus pratensis, that are grazed by livestock in the Bandar Torkaman plain rangelands in north of Iran.
Trichome Micromorphology And Its Significance In The Systematics Of Convolvulus L. (Convolvulaceae), Elham Roudi, Hamed Khodayari, Valiollah Mozaffarian, Shahin Zarre
Trichome Micromorphology And Its Significance In The Systematics Of Convolvulus L. (Convolvulaceae), Elham Roudi, Hamed Khodayari, Valiollah Mozaffarian, Shahin Zarre
Turkish Journal of Botany
Trichomes of 35 species of the genus Convolovulus and one species of the genus Calystegia (C. sepium) were investigated using light and scanning electron microscopy. The trichomes show a great variation, which provides valuable data for sections and species delimitation in Convolvulus. Trichomes of Convolvulus are nonglandular, simple, and basifixed or rarely asymmetrically medifixed. Characters of taxonomic interest were the degree of curviness (straight to spiral), orientation relative to the epidermal surface (appressed to erect), and presence of papillae on trichome surface. The trichomes are divided into two basic types: cylindrical and flattened ribbon-like. Our data provide the additional evidence …
Seed Morphology And Testa Ultrastructure In Allium Stipitatum Complex (Amaryllidaceae; Allioideae) And Their Systematic Significance, Mina Khorasani, Shahryar Saeidi Mehrvarz, Shahin Zarre
Seed Morphology And Testa Ultrastructure In Allium Stipitatum Complex (Amaryllidaceae; Allioideae) And Their Systematic Significance, Mina Khorasani, Shahryar Saeidi Mehrvarz, Shahin Zarre
Turkish Journal of Botany
Characteristic features of seed and testa cells in 13 species of Allium, representing its five recognized sections, Compactoprason, Megaloprason, Procerallium, Decipientia and Pseudoprason were studied using both stereomicroscope and scanning electron microscope. The identified characters, such as seed shape, alignment and shape of testa cells, features of outer cell walls, verruca type, density of verrucae and granules, seed size as well as cell wall undulations were evaluated statistically. The our findings indicated the significance level of P ? 0.01 for examined characters using the Kruskal-Wallis and ANOVA analyses.Two principal components of factor analysis revealed the following traits to be most …