Agronomy and Crop Sciences Commons^™

Allelopathy Of Panicum Maximum Jacq. Cultivars On Tree And Shrub Forage Legumes: Tolerance Index, A. R. P. Almeida, T. J. D. Rodrigues

IGC Proceedings (1977-2023)

The objective of this work was to evaluate the tolerance of three forage legumes (Leucaena leucocephala (Lam.) de Wit., Cajanus cajan (L.) Millsp. cv. Kaki and Sesbania sesban (L.) Merr.) to the allelopathic effects of three cultivars of Panicum maximum Jacq. (cv. Mombaça, cv. Aruana and cv. Tanzânia-1), under greenhouse conditions. The root and shoot tolerance indexes were calculated using the data of dry mass of roots and shoots of plants cultivated in pots and moistened with water or aqueous extracts (0,10 and 20%) of the cultivars of P. maximum. The results indicated that: a) the root tolerance …

Compatibility Of Kura Clover And Cool Season Grass Mixtures In Michigan, P. Jeranyama, R. H. Leep, T. Dietz

IGC Proceedings (1977-2023)

Kura clover (Trifolium ambiguum Bieb.) is an alternative forage legume for rotational grazing in cool-season grass mixtures. However, compatibility with cool-season grasses is unknown. Seven cool-season perennial grasses were seeded into Kura clover in a rotational grazing experiment. The objectives of this study were to evaluate botanical composition, forage yield and quality of binary mixtures of cool-season grass with Kura clover. Field studies were conducted on a Nester (fine sandy loam) soil at Lake City Experiment Station, Lake City, MI. Botanical compositions in the first year of the study heavily favored grasses (avg. 74%) and Kura clover accounted for …

Forage Legume Presence And Grazing Intensity Effect On Nitrogen Dynamics In Brachiaria Pastures In The South Of Bahia, Brazil, R. B. Cantarutti, R. Tarré, R. Macedo, C. De P. Rezende, J. M. Pereira, E. Ferreira, B. J. R. Alves, S. Urquiaga, R. M. Boddey

IGC Proceedings (1977-2023)

The objective of this study performed in the Atlantic forest region of the South of Bahia (Brazil) was to examine the influence of the presence of the forage legume Desmodium ovalifolium in pastures of Brachiaria humidicola on the nitrogen recycled through plant litter over stocking rates of 2, 3 and 4 head ha^-1. The results demonstrated that the presence of the D. ovalifolium in the pasture significantly increased the protein content of the associated Brachiaria grass, and the rate and quantity of N recycled through the litter pathway. While had no significant increase in animal weight gain due …

Production Of Orchard-Grass Cultivars (Dactylis Glomerata) In Mixtures With Alfalfa (Medicago Sativa), Under Grazing Conditions, R. A. Barbarossa, D. P. Miñón

IGC Proceedings (1977-2023)

In the Lower Valley of the Río Negro (northern Patagonia, Argentina), six binary mixtures of orchard-grass (Dactylis glomerata) cultivars (Porto, Currie, Filox, a Local ecotype, Pergamino El Cencerro MAG) and alfalfa (Medicago sativa) Monarca SP INTA, were tested under grazing and irrigation. Mixtures were evaluated during three growing seasons (96/97; 97/98 and 98/99). Total forage production of mixtures and botanical composition was measured (orchard-grass cultivars and alfalfa). Porto, Currie, Filox, Local and Cencerro cultivars reached similar yield, while Amba produced less forage (p< 0.05). Mixture yield showed no significant difference, except Porto + alfalfa, which was lower (p< 0.05). The grass was higher in spring (1^st grazing) of three growing seasons. Orchard-grass + alfalfa showed highest dry matter …

International Grassland Congress Outlook – A Historical Review And Future Expectations, L. R. Humphreys

IGC Proceedings (1977-2023)

Features of the history of the International Grassland Congress are mentioned. Aspects of a number of failed themes in grassland science are described with respect to molecular biology, intensive systems of ruminant production, carbohydrate use in plant growth, plant succession and range condition, and stocking method. Future expectations are focused on meeting a balance of objectives, maintaining reductionist science, taking new initiatives in plant improvement and in the development of animal production systems, and reducing barriers to international trade. The adoption of grassland science depends upon the growth of new learning, especially through cyclical interaction between scientists and farmers.

Production Potential Of South America Grasslands, G. E. Maraschin

IGC Proceedings (1977-2023)

Grasslands exist all over the world under a wide range of climates, soil types, topography conditions and seasonality. The South America grasslands cover a wide range of ecosystems and vegetaion types, going from desert areas to steppes, subhumid temperate, subtropical and tropical savannas embodying also portions of the tropical rain forest environment, and represent one of the Earth’s largest expanses of natural rangelands (Oesterheld et al., 1992). They represent developed ecosystems requiring acquaintance to accept sound agronomic and ecological activities. The diversity of vegetation determined by the latitudes 6^oN, down to the southern most tip of the continent …

Grassland Production And Management – Trends And Perspectives For The 21St Century, John Hodgson

IGC Proceedings (1977-2023)

The XIX International Congress is set in a time of unprecedented change, with increasing uncertainty about the long-term sustainability of established systems of land use. The major threats are the continuing rapid increase in the human population of the world, the pressure on land resources to meet food requirements, the effects of global warming on climate stability, and the consequence of these factors on land resource stability and food production potential. Overlying these threats is the impact of the global economy on land use policies.

Projections made at the XVIII International Grassland Congress in 1997 suggested that food production could …

The Effects Of Gibberellic Acid, Smoke Water, And Cold Stratification On The Germination Of Native Perennial Seed, Zyreasha Tippins

Electronic Theses and Dissertations

In this study, I evaluated the germination rates of twenty native plant species and their response to cold stratification as well as four chemical solution treatments—water (control), gibberellic acid, smoke water, and gibberellic acid with smoke water. Seeds were evaluated and counted twice a week. Of the twenty evaluated species, sixteen had germination rates over 3% or 1 seed out of 30. Stratification increased germination by 54% when compared to the control. For chemical treatments, gibberellic acid and gibberellic acid with smoke water were significantly different from the control and increased germination by an average of 47% and 48%, respectively. …

Analysis And Countermeasure Of Unbalanced Ecology System Of Chinese Temperate Grassland, Xinshi Lu, Lin Ai

IGC Proceedings (1977-2023)

No abstract provided.

Natural Grassland Of China, Changcun Lin, Tingcheng Zhu

IGC Proceedings (1977-2023)

No abstract provided.

Comparative Analysis For Herdsmen's Income Under The Different Background Systems, Jiri Xi

IGC Proceedings (1977-2023)

No abstract provided.

Critical Pasture, Seasonal Grazing And Sustainable Development Of Grassland Animal Husbandry Production In China, Quangong Chen, Yulin Mao

IGC Proceedings (1977-2023)

No abstract provided.

Finding New Strategies To Rehabilitate Grasslands In Western China, David R. Kemp, Z. B. Nan, J. P. Wu, J. F. Yun, Z. Xu

IGC Proceedings (1977-2023)

No abstract provided.

Practice Of Rangeland Co‐Management In Hongyuan, Bai Ze

IGC Proceedings (1977-2023)

No abstract provided.

Grassland Resources In Liaoning Province Of China: Problems And Management Strategies, Guijuan Du, Jiaming Zheng

IGC Proceedings (1977-2023)

No abstract provided.

Dividing The Ecological Environmental Area For The Northwest Dry Grassland Of China, Genzhu Chang, Xuehui Zhou, Hongshan Yang

IGC Proceedings (1977-2023)

No abstract provided.

Slope Aspect Has Effects On Belowground Biomass And Root Length Of Semi‐Arid Hilly Steppe, Xiaoying Gong, Shan Lin, Qingmin Pan, Holger Brueck, Klaus Dittert, Friedhelm Taube

IGC Proceedings (1977-2023)

No abstract provided.

Water Resources Development And Utilization In The Pastoral Area Of China And Grassland Ecological Protection, Jiao Yong

IGC Proceedings (1977-2023)

No abstract provided.

Livestock Diversity And Climate Change In Rangelands, Irene Hoffmann, Beate Scherf, David Boerma

IGC Proceedings (1977-2023)

No abstract provided.

Matching Up The Complexity Of Grassland Of Inner Mongolia — On The Methodology Issues, Yisheng Zheng

IGC Proceedings (1977-2023)

No abstract provided.