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Articles 1 - 19 of 19
Full-Text Articles in Physical Sciences and Mathematics
The Influence Of High Density Grazing And Conventional, Rotational Grazing On Soil And Vegetation Parameters In The Semi-Arid And Mesic Grasslands Of South Africa, Jamie Paulse, C. Visser, P. J. Malan, G. N. Smit, F. H. De Witt
The Influence Of High Density Grazing And Conventional, Rotational Grazing On Soil And Vegetation Parameters In The Semi-Arid And Mesic Grasslands Of South Africa, Jamie Paulse, C. Visser, P. J. Malan, G. N. Smit, F. H. De Witt
IGC Proceedings (1997-2023)
In South Africa, multi-camp rotational grazing using ‘conservative stocking rates’ have been the conventional approach to livestock grazing management systems. However, as of late, the high-desnity approach (used interchangeably – depending on the situation – with regenerative grazing, mob grazing, short duration, high pressure grazing, rapid rotation, time controlled, ultra-high density, holistic grazing and holistic resource management) has been adopted by numerous farmers. This approach is considered to be an adaptable one, incorporating the ‘herd effect’ concept, whereby large numbers of animals occupy an area for short periods of time, and allowed an extended rest period. It claims to improve …
Investigation On The Temporal Variation Of Vegetation Cover In Karaj River Basin (1973-1993), M. Mohseni Saravi, A. Malekian, B. Mohammadi Golrang
Investigation On The Temporal Variation Of Vegetation Cover In Karaj River Basin (1973-1993), M. Mohseni Saravi, A. Malekian, B. Mohammadi Golrang
IGC Proceedings (1997-2023)
Area changes in vegetation cover depend on several climatic and edaphic factors as well as direct and indirect human activities. Vegetation maps in a region are mosaics of various associations and types, which clearly show their characteristics and provide a useful tool for classification purposes. Kochler (1967) suggested that vegetative forms and species are 2 most important factors for descriptive purposes. This research aimed mainly to determine the vegetation types based on floristic-physiognomic forms and comparison of vegetation cover maps of 2 different dates to clarify the temporal variations of vegetation cover over this period. This detection of change would …
Rangelands In The Mediterranean Zone Of Croatia, J. Rogosic
Rangelands In The Mediterranean Zone Of Croatia, J. Rogosic
IGC Proceedings (1997-2023)
Rangelands dominate the landscape of the Mediterranean part of Croatia along the Adriatic coastline, occupying 83% of the agricultural land (1.7 million ha) and 40% of the entire country. The proportion of rangelands is considerably higher in the Mediterranean littoral than in other ecological regions of Croatia. Sheep and goats are widespread in the region, comprising 76% of total sheep and goat numbers in Croatia. However, in comparison to other regions of Croatia, livestock production in the Mediterranean zone is not well developed. Continuous grazing begun too early in the growing season has caused substantial rangeland degradation and a decline …
The Comparative Effects Of Short Duration, High Density And Conventional, Rotational Grazing On Different Soil, Vegetation And Animal Parameters In Dry And Mesic Grasslands Of South Africa, Jamie Paulse, Paul Malan, Nico Smit
The Comparative Effects Of Short Duration, High Density And Conventional, Rotational Grazing On Different Soil, Vegetation And Animal Parameters In Dry And Mesic Grasslands Of South Africa, Jamie Paulse, Paul Malan, Nico Smit
IGC Proceedings (1997-2023)
Short duration, high density grazing is a grazing management strategy that incorporates the rotation of large livestock herds, often at double or triple the normal prescribed stocking densities of the specific area. It is claimed that this type of grazing management can improve rangeland health by improving soil and vegetation condition, and subsequently influencing animal performance. Regardless of the scarcity of scientific evidence validating these claims, the change from conventional rotational grazing systems to short duration, high density grazing systems is on the increase in South Africa. This study aims to assess these claims, through the quantification of various rangeland …
Effect Of Temperature On Phenology In Triple-Awned Grass (Stipagrostis Plumosa), Hossein Azarnivand, H. Dastmalchi
Effect Of Temperature On Phenology In Triple-Awned Grass (Stipagrostis Plumosa), Hossein Azarnivand, H. Dastmalchi
IGC Proceedings (1997-2023)
Phenology of triple-awned grass in different stages of vegetative growth, flowering and seed falling was investigated. Each phenological stage was related to minimum and maximum air and soil surface temperatures. Soil surface temperature was measured two times per day during different seasons. Climate data were obtained from the nearest weather station. The study was carried out in sand dunes of band-e-rig of Kashan in the central region of Iran. This species is important in terms of wind erosion control and livestock feeding in arid areas. The results showed that air temperatures ranged from –22 oC to 41.5 oC …
Changes Of Vegetation In The Sandy Desertification Process Of Grassland In Yanchi, Ningxia, D. M. Xu, K. Wang, Y. Z. Xie
Changes Of Vegetation In The Sandy Desertification Process Of Grassland In Yanchi, Ningxia, D. M. Xu, K. Wang, Y. Z. Xie
IGC Proceedings (1997-2023)
No abstract provided.
The Rangeland Resource Status And Its Variability In Zoige, Qinghai‐Tibetan Plateau, Qian Wang, Ning Wu, Peng Luo
The Rangeland Resource Status And Its Variability In Zoige, Qinghai‐Tibetan Plateau, Qian Wang, Ning Wu, Peng Luo
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.
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.
Vegetation Succession Characters Of Desertification Grassland In Hulunbeier Steppe, Dongxia Liu
Vegetation Succession Characters Of Desertification Grassland In Hulunbeier Steppe, Dongxia Liu
IGC Proceedings (1997-2023)
No abstract provided.
Study Of Environmental Factors Effects On Vegetation, Case Study: Iran, A. Tavili
Study Of Environmental Factors Effects On Vegetation, Case Study: Iran, A. Tavili
IGC Proceedings (1997-2023)
No abstract provided.
Relationships Between Veresk Rangeland Vegetation And Environmental Characteristic Using Multivariate Analysis Methods, E. Shahriary, M. Beniaz, A. Tavili, H. M. Asgari, H. Khedrigharibvand
Relationships Between Veresk Rangeland Vegetation And Environmental Characteristic Using Multivariate Analysis Methods, E. Shahriary, M. Beniaz, A. Tavili, H. M. Asgari, H. Khedrigharibvand
IGC Proceedings (1997-2023)
No abstract provided.
Relationship Of Soil Seed Bank And Vegetation In Hot‐Dry Valley Grassland Of Jin‐Sha River, J. L. Zhang, Y. F. Bi
Relationship Of Soil Seed Bank And Vegetation In Hot‐Dry Valley Grassland Of Jin‐Sha River, J. L. Zhang, Y. F. Bi
IGC Proceedings (1997-2023)
No abstract provided.
Effects Of Atriplex Canescens On Planted Areas In Iran, M. A. Zare Chahouki, Mohammad Jafari, Hossein Azarnivand, M. Shafi Zadeh
Effects Of Atriplex Canescens On Planted Areas In Iran, M. A. Zare Chahouki, Mohammad Jafari, Hossein Azarnivand, M. Shafi Zadeh
IGC Proceedings (1997-2023)
No abstract provided.
Central Afghanistan Rangelands, Daniel G. Robinett
Central Afghanistan Rangelands, Daniel G. Robinett
IGC Proceedings (1997-2023)
No abstract provided.
Relationship Between Soil Chemical And Physical Properties And Vegetation In The Latest Decade Of Alpine Grasslands Of Southern Qinghai, China, Sachiko Idota, Jiahua Yang, Manabu Tobisa, Xiaoqin Li, Guomei Li, Rende Song, Haizhu Li, Nobumi Hasegawa, Masahiro Tasumi, Naoyuki Yamamoto, Aya Nishiwaki, Yasuyuki Ishii
Relationship Between Soil Chemical And Physical Properties And Vegetation In The Latest Decade Of Alpine Grasslands Of Southern Qinghai, China, Sachiko Idota, Jiahua Yang, Manabu Tobisa, Xiaoqin Li, Guomei Li, Rende Song, Haizhu Li, Nobumi Hasegawa, Masahiro Tasumi, Naoyuki Yamamoto, Aya Nishiwaki, Yasuyuki Ishii
IGC Proceedings (1997-2023)
The Tibetan Plateau is one of the most important ecosystems in the world (Yang et al. 2009), particularly because of the global importance of its climate (Tian et al. 2008; Wang et al. 2008). Grassland ecosystems on the plateau are sensitive to global change, because the plateau is located in marginal land areas where the growth and distribution of plants depend heavily on local climatic conditions (Zhang et al. 1996). The alpine grassland of Qinghai Province in China has been traditionally used for extensive grazing by sheep and yak (Bos grunniens), but is now degraded from …
The Changing Patterns In Grasslands And Soil Fertility Along The Eastern Eurasian Steppe Transect Across China–Mongolia–Russia, Xiangyang Hou, Leonid Ubugunov, S. Tserendash, Haijun Chen, Wenjun Han, Xiangjun Yun, Ding Yong, Wang Zhen, Lei Ji
The Changing Patterns In Grasslands And Soil Fertility Along The Eastern Eurasian Steppe Transect Across China–Mongolia–Russia, Xiangyang Hou, Leonid Ubugunov, S. Tserendash, Haijun Chen, Wenjun Han, Xiangjun Yun, Ding Yong, Wang Zhen, Lei Ji
IGC Proceedings (1997-2023)
This paper analyses the adaptation and change in species along the north-south Eastern Eurasian Steppe Transect across China – Mongolia – Russia and considers the implications for climate change and management. The plant community diversity, above-ground biomass, N:P ratios of community and of dominant species, soil N (nitrogen), soil P (phosphorus) and AP (available phosphorus) contents were studied along a 1400 km north-south transect. The main findings were: (1) the community diversity and productivity decreased with the increase in latitude and a significant negative correlation was found between the many plant characteristics and latitude (P < 0.05) – decreasing diversity, biomass and N:P ratios; (2) soil AP content was lowest in Inner Mongolia, whereas no significant change in soil total P with latitude was found in China-Mongolia-Russia transect, a significant positive correlation was detected between the soil nutrient (N and AP) and latitude (P < 0.05); (3) a significant positive correlation was evident between plant community P content and soil AP content (P < 0.01), but a negative correlation was found between community N:P ratio and soil AP content (P < 0.05). The soil AP content can be used as a soil properties indicator to reflect the plant communities P content and N: P ratio. It is suggested that greater human activities in Inner Mongolia may be an important factor affecting soil AP content, community N:P and plant growth.
Influence Of Grazing Exclusion On Vegetation And Productivity Of Kyrgyz Pastures, N. V. Kilyazova, М. I. Аdenov, К. A. Samsaliev, А. Каrybekov, B. Jeangros
Influence Of Grazing Exclusion On Vegetation And Productivity Of Kyrgyz Pastures, N. V. Kilyazova, М. I. Аdenov, К. A. Samsaliev, А. Каrybekov, B. Jeangros
IGC Proceedings (1997-2023)
The aim of this study was to assess the effect of grazing exclusion on the vegetation and productivity of: (1) pastures near villages that are grazed intensively through-out the year; and (2) pastures, which are used in summer and are less intensively grazed through the remainder of the year. The potential of degraded pastures to recover, when protected from overgrazing, was also evaluated. Six pastures (3 located in or near villages and 3 used for summer grazing) were selected with local community representatives in 3 pilot regions of Kyrgyzstan (the Lahol and Теrеk regions of Naryn oblast and the Оrgochor …
Grassland Renovation And Consequences For Nutrient Management, Johannes Isselstein, Manfred Kayser
Grassland Renovation And Consequences For Nutrient Management, Johannes Isselstein, Manfred Kayser
IGC Proceedings (1997-2023)
Sward degradation is a serious threat to the functioning of grassland and the provision of ecosystem services. Renovation measures are frequently applied in order to restore degraded swards. However, the success is highly variable and substantial tradeoffs are often found following renovation such as among agronomic and environmental services. Starting from a general classification of renovation measures the paper investigates the processes induced by renovation that lead to a change of the vegetation and that affect carbon and nitrogen fluxes. These processes are strongly interrelated and dependent on site, climate and management condition as well as on the time scale. …