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Articles 1231 - 1260 of 11583

Full-Text Articles in Plant Pathology

Dorycnium And Other Mediterranean Species - Their Use For Forage And Soil Conservation In Semi-Arid Environments Of New Zealand, B J. Wills, J.S C. Begg, J S.S Sheppard Jun 2025

Dorycnium And Other Mediterranean Species - Their Use For Forage And Soil Conservation In Semi-Arid Environments Of New Zealand, B J. Wills, J.S C. Begg, J S.S Sheppard

IGC Proceedings (1977-2023)

Dorycnium is one of several Mediterranean plant species that have been under evaluation for soil conservation purposes in New Zealand since the 1970's. In the dry South Island hill country, particular problems exist in relation to drought-prone, wind and frost affected, low to moderate fertility soils. In many cases these areas can provide for stock wintering and lambing, but in a semi-arid climate they produce little stock forage and provide an ideal habitat for rabbits. The two Dorycnium species described in this paper are nitro­gen fixing, leguminous plants which have shown considerable promise for revegetation in drought-prone and semi-arid areas …

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Effects Of Temperature On Photosynthesis Of Miscathus Species, Jen-Hsien Weng Jun 2025

Effects Of Temperature On Photosynthesis Of Miscathus Species, Jen-Hsien Weng

IGC Proceedings (1977-2023)

Miscanthus spp. is a perennial C4 grass. It distributes in the Pacific Islands, Philippines, China and Japan. In Taiwan (N 21°55' - 25°18'), Miscanthus is the most widely distributed and important native grass. It grows vigorously from flat areas up to 3000 m high in mountain areas. Photosynthesis is one of the major determinants of biomass production in higher plants. In many cases, the photosynthesis of C4 plants was reduced remarkably at low temperature as compared to that of C3 plants (Berry and Bjorkman, 1980). In general, the species of C4 plants decreased with increasing lati­tude and elevation (Takeda and …

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Yield Of Grass And Legumes In Relation To The Rainfall Pattern In The Dryland Farming Area Of Bali, W Sukanten, I M. Nitis, S Putra, M Suarna, K Lana Jun 2025

Yield Of Grass And Legumes In Relation To The Rainfall Pattern In The Dryland Farming Area Of Bali, W Sukanten, I M. Nitis, S Putra, M Suarna, K Lana

IGC Proceedings (1977-2023)

According to Schmidt and Ferguson classification, the cli­matic of Bali varies from climatic zone B to climatic zone F (Manik et al., 1977). The dryland farming area with climatic zone F has average annual rainfall of 1000 mm with 116 rainy days distributed during the 8 months dry and 4 months wet seasons (Nitis et al., 1987). Some grass and legume species could grow in dry land farming area with average annual rainfal as low as 300 - 700 mm (O'Reilly et al., 1987). The objective of this paper was to study the response of the grass and legume yields …

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Preliminary Results Of Field Trial Evaluations Of Some Tropical Pasture Species Performance In The Humid And Sub-Humid Tropical Zones Of Yunnan Province, Southern China, Xu Xuie Jun, Wang Tu, Guo Zhen Yun Jun 2025

Preliminary Results Of Field Trial Evaluations Of Some Tropical Pasture Species Performance In The Humid And Sub-Humid Tropical Zones Of Yunnan Province, Southern China, Xu Xuie Jun, Wang Tu, Guo Zhen Yun

IGC Proceedings (1977-2023)

The Yunnan province has a very complex topography and climate. There are tropical and sub-tropical zones at altitudes ranging from 100-1 000 m. The project started its tropical pas­ture species evaluation trial in 1983 at Daliuhu - a dry tropical zone, and some results were reported (Mathison et al., 1985). In 1987, a similar trial was conducted at Mangzhongtien - a humid tropical zone. The objective of the work is to provide recommendations on species useful for pasture improvement for increased livestock production. This paper compares the first year's results from the two sites.

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Effet De L'Arbuste Fourrager Atriplex Repanda Phil. Sur La Fertilite Du Sol Et Sur La Strate Herbacee Associee, S Lailhacar, A Carasco, M A. Sadzaw, G Castellaro Jun 2025

Effet De L'Arbuste Fourrager Atriplex Repanda Phil. Sur La Fertilite Du Sol Et Sur La Strate Herbacee Associee, S Lailhacar, A Carasco, M A. Sadzaw, G Castellaro

IGC Proceedings (1977-2023)

Au cours des dernieres annees, les plantations d'arbustes fourragers ont prolifere pour corriger Jes deficiences nutritives saisonnieres en proteine et carotene des therophytes qui domi­nent la strate herbacee des prairies de climat mediterraneen aride du Chili. En 1988 la rve Region possedait plus de 30.000 ha de plantations d'Atriplex repanda et A. nummularia. Etant donne les qualites nutritives de ces arbustes, ils doivent etre consideres comme complement du fourrage herbace et non pas comme son substitut, et, autant que possible, les deux res­sources devraient etre presentes pour fournir un regime satis­faisant a la fin de la gestation d'ovins et de …

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Etude Microhistologuque Du Regime Alimentaire Des Ruminants En Zone Sahelo-Soudanienne: Difficultes Methodologiques, H Planton Jun 2025

Etude Microhistologuque Du Regime Alimentaire Des Ruminants En Zone Sahelo-Soudanienne: Difficultes Methodologiques, H Planton

IGC Proceedings (1977-2023)

Un programme de recherches sur !'utilisation des parcours naturels a ete mis en place au Ferlo (Senegal) pour etudier la composition des regimes alimentaires et leur relation avec celle des paturages. Les observations de terrain et les prelevements ont ete recueillis en 1982 et 1983, annees dont la pluviosite resta comprise entre 400 et 500 mm repartis sur 3 a 4 mois (Guerin, 1987). L'analyse microhistologique de 105 echantillons recoltes en 1982-1983 a ete realisee en 1986 dans le but de tester en milieu tropical sec cette methode habituellement utilisee en milieu tempere.

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Rest Period Requirements And A Role For Stylosanthes In Cereal Cropping Systems In The Nigerian Subhumid Zone, M A. Mohamed Saleem, K B. Adeoye, R R. Von Kaufmann Jun 2025

Rest Period Requirements And A Role For Stylosanthes In Cereal Cropping Systems In The Nigerian Subhumid Zone, M A. Mohamed Saleem, K B. Adeoye, R R. Von Kaufmann

IGC Proceedings (1977-2023)

Ferric luvisols that dominate the subhumid zone of Nigeria and west Africa (60 % of the land area) are the main group of soils suitable for grain crops. However, when cropped repeat­edly these soils are rapidly degraded leading to low grain yields. Most tropical soils suited for annual crops require a crop free period (Rest Period) of varying duration to maintain soil in a productive state (Young and Wright, 1984). Recuperation of degraded land is slow under the traditional practice of bush fallowing. This cannot sustain the yields and cropping fre­quency necessary to support the increasing population. Alternatives to natural …

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Salt Tolerant Legumes From The Guadalquivir Delta (S.W. Spain), T Maranon, J M. Romero, J M. Murillo Jun 2025

Salt Tolerant Legumes From The Guadalquivir Delta (S.W. Spain), T Maranon, J M. Romero, J M. Murillo

IGC Proceedings (1977-2023)

Saline environments occupy about 15 millions ha in the Mediterranean basin (Le Houerou, 1986). Many of those areas have been traditionally devoted to grazing. Native salt tolerant ecotypes of forage legumes and grasses are increasingly menaced. Overgrazing may lead to local extinction of the most palatable races ; on the other hand, their habitats are decreasing in salt marshes by drainage and farm­land reclamation. Therefore, a coordinated program of survey, evaluation and conservation of salt tolerant plant genetic resources would be desirable in the Mediterranean basin. A project to study the ecology, physiology and nutritive value of salt tolerant annual …

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Introduction Of Fourwing Saltbush (Atriplex Canescens) Into Degraded Rangelands In Upload Baluchistan, S R. Aro, M I. Sultani, M Asghar, J.D H. Keatinge Jun 2025

Introduction Of Fourwing Saltbush (Atriplex Canescens) Into Degraded Rangelands In Upload Baluchistan, S R. Aro, M I. Sultani, M Asghar, J.D H. Keatinge

IGC Proceedings (1977-2023)

The grassland and shrubland range types in upland Baluchis­tan have a climate which is continental, arid to semi-arid, and Mediterranean in character. Winter precipitation predominates but significant summer monsoonal rainfall occurs in the grass­land areas. The latitudinal zone is from 28° to 32°N. Dominant species in the shrubland type are Artemisia maritima and Haloxylon griffithii, where the annual precipitation is 200 mm, with 80 % occurring during winter. Dominant species in the grassland type are Cymbopogon jwarancusa and Chrysopogon aucheri, where annual precipitation is 300 mm, with 40 % occurring in summer. Range stocking densities, mostly from sheep …

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The Assessment Of Grazing Persistence And Vigor Of Tropical Forage Legumes For The Caribbean, M W. Michaud, Y Soso De Rosa, W D. Pitman, A E. Kretschmer Jr Jun 2025

The Assessment Of Grazing Persistence And Vigor Of Tropical Forage Legumes For The Caribbean, M W. Michaud, Y Soso De Rosa, W D. Pitman, A E. Kretschmer Jr

IGC Proceedings (1977-2023)

Research in both the U.S. Virgin Islands (Oakes, 1970) and the Dominican Republic (Soto de Rosa, 1987) has identified forage legumes appropriate for pasture plantings. Despite the success of these research programs, there are still numerous untested accessions in international and regional collections that may be adapted to the climatic, edaphic, and management conditions ot the Caribbean. To test some of the more promis­ing lines available from both commercial and experimental sources, tropical forage legumes were planted in St. Croix, U.S. Virgin Islands, and the Dominican Republic and subsequently grazed. The objectives of the research were to determine the most …

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Persistence Of Subterranean Clover Cultivars In A Cleared Forest Area In Northern Greece, V Papanastasis, P Platis Jun 2025

Persistence Of Subterranean Clover Cultivars In A Cleared Forest Area In Northern Greece, V Papanastasis, P Platis

IGC Proceedings (1977-2023)

Subterranean clover (Trifolium subterraneum L.) is con­sidered a very valuable species for the improvement of degraded Mediterranean pastures and rangelands. Its persist­ence on such areas, however, depends on the particular culti­vars used and the physical and chemical conditions of their soil (Gomez, 1981; Collins et al., 1984, Crespo and Romano, 1985). Degraded forests covered by shrubby oaks occupy large areas in northern Greece. The grazing value of these areas, especially for sheep, is very low. However, if the oaks are cleared by buldozer and the areas are sown after cultivation with subterranean clover, very productive pastures may be developed …

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Improving Pasture Resources In West Africa: Evaluation Of Forage Legumes To Meet The Social And Ecological Constraints, S A. Tarawali, M Peters, M A. Mohamed Saleem Jun 2025

Improving Pasture Resources In West Africa: Evaluation Of Forage Legumes To Meet The Social And Ecological Constraints, S A. Tarawali, M Peters, M A. Mohamed Saleem

IGC Proceedings (1977-2023)

Throughout sub-Saharan Africa, poor nutrition is a major constraint to livestock production (Henzell and t'Mannetje, 1980). In the West African subhumid and semi arid zones, the harsh dry season means that the quality of the naturally avail­able forage is insufficient to meet cattle maintenance requirements for more than half the year (Mohamed-Saleem, 1986) ; in more humid areas intensive cropping restricts access to fodder. The introduction of improved forage legumes is recognised to be a viable approach to alleviating this problem (Jones et al., 1984). In Nigeria, the International Livestock Centre for Africa (ILCA) has successfully introduced Stylosan­thes pastures to …

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Evaluation Of 16 Gliricidia Provenances In Dryland Farming Area In Bali, I M. Nitis, K Lana, M Suarna, W Sukanten, S Putra Jun 2025

Evaluation Of 16 Gliricidia Provenances In Dryland Farming Area In Bali, I M. Nitis, K Lana, M Suarna, W Sukanten, S Putra

IGC Proceedings (1977-2023)

The present taxonomy indicates that Gliricidia, with its ori­gin in South America, consists of three species: G. sepium (Jacq.) Walp., G. maculata (HBK) Steud, and G. ehrenbergii (Schlecht) Rydb (Hugues, 1987). Gliricidia sepium is one of the shrub legume commonly used in the tropics for shade, fence, green manure, firewood and fod­der (NFTA, 1987). However, it is not definitely known how its growth habit affects its utilization. The objectives of this study was to evaluate the growth of 16 provenances of Gliricidia sepium collected from 8 countries in the tropics.

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A Study On The Importance Of Forage Trees On The Native Grazing Land, E Bin Quan Jun 2025

A Study On The Importance Of Forage Trees On The Native Grazing Land, E Bin Quan

IGC Proceedings (1977-2023)

Inner Mongolia grassland has a rather simple management and low production. Artificial pasture covers 0.08 % of the total grassland, the output value of animal husbandry is only 24 % of that of agriculture. In 1984, 13.66 kg beef and mutton, 20.8 kg cow and sheep milk, 4.8 kg fine hair were produced for a hundred mu grassland(]). Herbivore value was RMB 82 Yuan. Because of coldness and shortage of forage, during the period of 1952-1985 there was a total livestock loss of 81.000.000 and per sheep lossed weight of 5 kg every winter and spring. In the heavy snowfall …

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Grassland Improvement And N Fertilization Management Of Woodland In Korea, S Seo, Y C. Han, M S. Park Jun 2025

Grassland Improvement And N Fertilization Management Of Woodland In Korea, S Seo, Y C. Han, M S. Park

IGC Proceedings (1977-2023)

The 66 % of total national land is forest in Korea. Among them potential area for grassland is estimated as over 1.0 mil­lion ha. Therefore, the grassland development on woodland has become an important issue for forage production. Generally shade is a limiting factor in forage production beneath a canopy of trees. Yields of forages decreased with increasing shade. Also shading by standing trees may con­tribute to toxic level of nitrate nitrogen (NO3 -N) and reduction of sugar propuction in forages (Stritzke et al., 1976). N fertilization on woodland pasture was very benefic for increasing grass yield and protein yield. …

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Structure And Function Of The Central Himalayan Alpine Grassland, India, J Ram, S P. Singh Jun 2025

Structure And Function Of The Central Himalayan Alpine Grassland, India, J Ram, S P. Singh

IGC Proceedings (1977-2023)

Extensive alpine and sub-alpine pastures occur in Central Himalaya (28-31° N lat. and 79-81° E long.) at 3.000-4.500 rn. There is a notable lack of quantitative information on high mountain grasslands in India. During the snow-free surnrner period (May to September), graziers both from plains and hills stay in these meadows to graze their sheep, horses and cattle. The primary objective of this study was to quantify the struc­ture and productivity of Himalayan alpine grassland and com­pare the same with alpine sites distributed elsewhere and those of the adjacent Gangetic plains.

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Types Of Mountainous Grassland And Their Economic Assessment Of Productivity In The Southern Part Of Gansu Province Of China, Wang Chingjui Jun 2025

Types Of Mountainous Grassland And Their Economic Assessment Of Productivity In The Southern Part Of Gansu Province Of China, Wang Chingjui

IGC Proceedings (1977-2023)

The mountainous grassland in the southern part of Gansu province of China, which is located between 33°06'-35°29'N and 101 °60' -103°E, lies on the northeastern border land of the Qinghai-Xizang plateau. On the north, it is contigiuous to loess plateau, on the south it borders on Chuan-xi plateau. The east­ern part of the grassland belongs to Lung-nan mountainous area. The terrain of the region slopes from south to north. On the south of the area, stand Ji-shi mountains, in the middle and on the north stand Xi-qin mountains. The large part of the region is 3.000 metres above sea level. …

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Interest Of Traditional Practices To Improve Grassland Fertility In The Central Pyrenees, G Balent, M Duru Jun 2025

Interest Of Traditional Practices To Improve Grassland Fertility In The Central Pyrenees, G Balent, M Duru

IGC Proceedings (1977-2023)

In the Central Pyrenees, the decline of agriculture has led to the transformation of fields into grasslands. The study of the dynamic of this secundary succession has shown the import­ance of residual soil fertility and grazing pressure on the botan­ical composition of plots (Balent & Duru, 1984). The actuals trends of evolution consist in a general decrease of soil fertility and, an irregular distribution of grazing pressure, the free-ran­ging animals selecting, during winter and early spring, the sites of higher fertility (Balent, 1986). From the mineral and botanical compositions of the veg­etation, we examine the interest of three traditional manage­ment …

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The Effect Of Management On Floristic Composition And Production On Species-Rich Hay Meadows, A Garcia, I Navascues Jun 2025

The Effect Of Management On Floristic Composition And Production On Species-Rich Hay Meadows, A Garcia, I Navascues

IGC Proceedings (1977-2023)

The old viewpoint that man and his influences are harmful to nature conservation has been proved that it is not necessa­rilly so. This fact is especially true in the species-rich hay meadow communities of Northern Spain. These old meadows can be defined by their traditional management which have not change for centuries and variety of plants and animals they have. These communities were originated by the first inhabit­ants who cleared the woodlands and could not be able to exist without the influence of man. Traditional management varies in detail throughout the area depending of the landowner, annual variation in climate …

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Evaluation On Vegetation And Forage Plant Resources In Tan Sheep Distributing Area, Chen Yi E Jun 2025

Evaluation On Vegetation And Forage Plant Resources In Tan Sheep Distributing Area, Chen Yi E

IGC Proceedings (1977-2023)

Tan sheep, a Mongolian sheep branch, famous for its fur products, is a fine variety distributed in northwestern China. It has a narrow eco-adaptation range concentrated in Ningsia Autonomous and the neighbouring regions. The special genetic characters and the position in sheep feeding of Tan sheep have long been attracting both Chinese and foreign animal husban­drists and ecologists to study. The genetic and distribution characters concerned with fur product quality have been reviewed by Cui et al. (1962), Li (1964), Shen and Di (1979). This paper deals mainly with the distinction of vegetation type and characters of forage plant resources …

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The Impact Of Utilization On A Cortaderia Pilosa (Whitegrass) Pasture In Terms Of Production, Botanical Composition And Tiller Dynamics, A B. Davies, Janet Riley, Rosie Poultney, A O. Carter Jun 2025

The Impact Of Utilization On A Cortaderia Pilosa (Whitegrass) Pasture In Terms Of Production, Botanical Composition And Tiller Dynamics, A B. Davies, Janet Riley, Rosie Poultney, A O. Carter

IGC Proceedings (1977-2023)

Cortaderia pilosa (Whitegrass) pastures cover an estimated 60 % of the land area in the Falkland Islands (Davies et al., 1971). Utilization levels are low as grazing sheep demonstrate preferences for other species. To evaluate the impact of increas­ing utilization levels on both the sheep and the pasture a graz­ing trial was carried out at Fox Bay, a dry site (400 mm mean rainfall) on West Falkland (52 degrees south, 60 degrees west). This paper reports on the botanical aspects of the first three years of this trial.

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Determination Of The Forage Yield And Quality Of Native Hay At 3 Different Growth Stages At Syangboche Yak Farm, Nepal, D Pariyar, C Samuel Jun 2025

Determination Of The Forage Yield And Quality Of Native Hay At 3 Different Growth Stages At Syangboche Yak Farm, Nepal, D Pariyar, C Samuel

IGC Proceedings (1977-2023)

The Syangboche Yak Farm is situated within the Sagarma­tha National Park in the district of Solukhumbu, eastern Nepal. The farm comprises 7 pasture areas stituated at different locations ranging from 3700 m. to 5700 m. The total farm area is 900 ha. and the pastures, situated at different heights, are used for grazing during specific periods of the month extending throughout the year. The size of the pastures varies from 15 to 250 ha. About 80 yaks pass their winters from November to May every year on a small pasture area of 15 ha at the farm proper at 3700 …

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Effect Of Summer Management On The Dead Plants, Weed Development, Regrowth And Dry Matter Yield In Orchardgrass Meadow, S Seo, J K. Lee, S J. Hwang Jun 2025

Effect Of Summer Management On The Dead Plants, Weed Development, Regrowth And Dry Matter Yield In Orchardgrass Meadow, S Seo, J K. Lee, S J. Hwang

IGC Proceedings (1977-2023)

Many cool-season grasses undergo growth retardation during summer when climatic conditions are unfavorable. Actually, grass growth was very vigorous during spring, but pasture production was reduced rapidly through the summer season. Therefore, optimum pasture management during hot summer period is very important to maintain good regrowth of grasses and persistence of pasture in Korea. Cutting height is reported to be an important factor in determining regrowth. Close cutting reduced the stand of nitrogen (N) fertilized pasture (Griffith and Teel, 1965), especially in summer season. In some instances the dead plants have been attributed to a depletion of reserve carbohydrate. Also …

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Increase In Productivity Of Natural Grasslands On Slopes, V V. Kolomeichenko Jun 2025

Increase In Productivity Of Natural Grasslands On Slopes, V V. Kolomeichenko

IGC Proceedings (1977-2023)

Natural grasslands occupy 3 billion hectares of the world, i.e. more than twice the world's arable croplands. In many countries most of the grasslands are situated on the slopes of gullies, cone-shaped hills, foothills and mountains. The grass stands on these lands are thinning through free grazing, and pasture degradation brings about the development of erosional processes (McCloud, 1974). For example, in the central part of the Middle Russian forest-steppe zone, the arable lands occupy 59%, grasslands 12% and woodlands 18%. The relief is very indented, the absolute altitudes are 200-300 m above sea level. Leached chernozem top soil horizon …

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Effects Of Seeding Rates And Seedbed Preparations On The Seedling Establishment And Yield Of Surface-Sown Pasture Species, Dong Am Kim, Sung Cheol Lee, Jong Kyeong Lee Jun 2025

Effects Of Seeding Rates And Seedbed Preparations On The Seedling Establishment And Yield Of Surface-Sown Pasture Species, Dong Am Kim, Sung Cheol Lee, Jong Kyeong Lee

IGC Proceedings (1977-2023)

During 1985-1986, approximately 74 % of grassland was improved by surface sowing using herbicides, burning, hoof cultivation and raking in Korea. At the same time the Korean government strongly recommended to use an excessively high seeding rate of pasture mixtures simply because deficiencies in establishment can be countered by increasing the seeding rate. Of the minimum seedbed preparation methods, herbicide treat­ment and hoof cultivations are well known as a promising method for surface sowing (Campbell et al., 1981 ; Kim et al., 1985), however, burning is still a matter of some controversy and also little is known concerning raking as …

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Study On Scarification And Fertilization Of Degraded Chinese Wildrye Meadow Pasture, Chen Zisheng, Zhao Mingping Jun 2025

Study On Scarification And Fertilization Of Degraded Chinese Wildrye Meadow Pasture, Chen Zisheng, Zhao Mingping

IGC Proceedings (1977-2023)

Chinese wildrye meadow pasture in west part of North-east China is one of the best grasslands in North China. Unfortu­nately, a serious degradation of the pasture has been caused by the unfavorable natural conditions such as drought, flooding, salt and alkali, and excessive utilization as well. Improving methods and machines have been studied and the result shows a practical prospect in West part of Jilin Province, China.

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The Research Of The Rehabilitation Of Deteriotated Leymus Chinense Grasslands, Hu Ming-Ge, Lu Ping-Zhang, Wang Yu-Lin Jun 2025

The Research Of The Rehabilitation Of Deteriotated Leymus Chinense Grasslands, Hu Ming-Ge, Lu Ping-Zhang, Wang Yu-Lin

IGC Proceedings (1977-2023)

There are vast zones of Leymus chinense grassland which are the type of grassland with high yield and good quality in Inner Mongolia and North-East of China. Since 1960's because of the overuse of the land and other natural factors this excellent grassland suffered from deterioration differently. The further development of animal husbandry was directly influenced. In order to prevent grassland deterioration, a series of techniques in renewing the grassland have been found out with notable economical results.

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Adaptation And Production Of Some Forage Species On The White Clay Soils Of North Eastern China, Hu Jia Lu, J E. Winch Jun 2025

Adaptation And Production Of Some Forage Species On The White Clay Soils Of North Eastern China, Hu Jia Lu, J E. Winch

IGC Proceedings (1977-2023)

Grain corn, soybeans and wheat have been produced on the white clay soils of eastern Heilongjiang province of the People's Republic of China for about 40 years. Yearly plowing, cultiva­ting and cropping led to a degradation in the physical and chemical properties of the heavy clay soil - a soil which constitutes 30 % of all the cultivated land in the region. This soil is characterized by a shallow loamy Ap horizon overlying a clay hard pan (Aw) (Zhang Zhi ui and Zhang Yuan fu, 1985). Forage crops have not been part of the rotation. To improve the soil physical …

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Facteurs Ecologiques Limitants De La Prairie Pyreneenne Aragonaise, Cristina Chocarro, R Fanlo, F Fillat Jun 2025

Facteurs Ecologiques Limitants De La Prairie Pyreneenne Aragonaise, Cristina Chocarro, R Fanlo, F Fillat

IGC Proceedings (1977-2023)

Dans tous !es systemes naturels la production est regulee par la capacite intrinseque des etres vivants et par !'ensemble des facteurs environnementaux qui !es conditionnent. Pour !es systemes prairiaux etudies ici, la capacite de crois­sance des especes depend de leur origine, qu'ils soient plus ou moins intensifies (taxons introduits et semes) ou bien qu'il s'agisse du fond floristique autochtone. Les facteurs environnementaux qui conditionnent la produc­tion sont : la pluviometrie annuelle, !'altitude, la temperature minimale printaniere, la situation geographique dans !es Pyre­nees et la gestion. Dans ce travail nous evaluons !'influence de quelques-uns de ces facteurs au moment de la …

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Importance Of Productive Grasslands In Protected Landscape Regions, Holecy Bohus Jun 2025

Importance Of Productive Grasslands In Protected Landscape Regions, Holecy Bohus

IGC Proceedings (1977-2023)

Grasslands, especially pastures, are often situated on extreme mountain sites in our country. Due to their botanical structure and natural production potential, they influence the ecological character of the region and give the impression of protected landscape. The aim is to preserve this specific character of the lanscape and on the other hand to look for the moderate grassland improvement and better utilization by nutrition and regular grazing. The untreated and non-utilized grasslands can lead to unfavourable changes of swards in the high localities. Therefore we tried to solve the moderate improvement of natural subalpine grasslands in the High Tatra …

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