Satellite Symposium 1: Optimisation

Presentations

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Physical Constraints in Grassland Ecosystems

I. M. Young, University of Abertay Dundee, UK
K. Ritz, Cranfield University, UK
C. S. Sturrock, University of Abertay Dundee, UK
R. Heck, University of Guelph, Canada

Chemical Components and Effects on Soil Quality in Temperate Grazed Pasture Systems

M. H. Beare, New Zealand Institute for Crop & Food Research
D. Curtin, New Zealand Institute for Crop & Food Research
S. Thomas, New Zealand Institute for Crop & Food Research
P. M. Fraser, New Zealand Institute for Crop & Food Research
G. S. Francis, New Zealand Institute for Crop & Food Research

Integrating Below-Ground Ecology into Sustainable Grassland Management

R. D. Bardgett, Lancaster University, UK

The Influence of Burning on Soil Microbial Biomass and Activity along the Boro Route in the Okavango Delta of Botswana

Tabo Mubyana-John, University of Botswana, South Africa
A. Banda, University of Botswana, South Africa

Estimating Nitrogen Fixation by Pastures on a Regional or Continental Scale

Murray Unkovich, The University of Adelaide, Australia

Cycling of N and P in Grass-Alone (Brachiaria) and Mixed Grass/Legume (Brachiaria/ Desmodium ovalifolium) Grazed Pastures in the Atlantic Forest Region of Brazil

R. M. Boddey, EMBRAPA, Brazil
R. Tarré, EMBRAPA, Brazil
R. Macedo, EMBRAPA, Brazil
C. de P. Rezende, CEPLAC, Brazil
J. M. Pereira, CEPLAC, Brazil
B. J. R. Alves, EMBRAPA, Brazil
S. Urquiaga, EMBRAPA, Brazil

40 years of Studies on the Relationships Between Grass Species, N Turnover and Nutrient Cycling in the Lamto Reserve in the Ivory Coast (Côte d’Ivoire)

L. Abbadie, ENS Labo. d'Ecologie, France
J. C. Lata, Université Paris, France

Benomyl Effects on Plant Productivity through Arbuscular Mycorrhiza Restriction in a Greek Upland Grassland

M. Orfanoudakis, Aristotle University of Thessaloniki, Greece
A. P. Mamolos, Aristotle University of Thessaloniki, Greece
F. Karanika, Aristotle University of Thessaloniki, Greece
D. S. Veresoglou, Aristotle University of Thessaloniki, Greece

The Addition and Cessation of Inorganic Fertiliser Amendments in Long-Term Managed Grasslands: Impacts on Above and Below-Ground Communities

C. D. Clegg, Institute of Grassland and Environmental Research, UK
P. J. Murray, Institute of Grassland and Environmental Research, UK
R. Cook, Institute of Grassland and Environmental Research, UK
T. Tallec, Institut de Recherche Biomédicale des Armées, France

Grassland Management Practices and the Diversity of Soil Nematode Communities

R. Cook, Institute of Grassland and Environmental Research, UK
P. J. Murray, Institute of Grassland and Environmental Research, UK
K. A. Mizen, Institute of Grassland and Environmental Research, UK

How Soil Properties Affect Egg Development and Larval Longevity of a Grassland Insect Pest - an Empirically Based Model

S. N. Johnson, University of Reading, UK
X. Zhang, University of Abertay Dundee, UK
J. W. Crawford, University of Abertay Dundee, UK
P. J. Gregory, University of Reading, UK
S. C. Jarvis, Institute of Grassland and Environmental Research, UK
P. J. Murray, Institute of Grassland and Environmental Research, UK
I. M. Young, University of Abertay Dundee, UK

Impact of Root Herbivory on Grassland Community Structure: From Landscape to Microscale

P. J. Murray, Institute of Grassland and Environmental Research, UK
R. Cook, Institute of Grassland and Environmental Research, UK
L. A. Dawson, Macaulay Land Use Research Institute, UK
A. C. Gange, University of London, UK
S. J. Grayston, Macaulay Land Use Research Institute, UK
A. M. Treonis, Macaulay Land Use Research Institute, UK

Study of Characteristics of Soil Animals in Halophilous Plant Communities of Leymus chinensis Grasslands of Northeast in China

Xiuqin Yin, Northeast Normal University, China
Y. Zhang, Northeast Normal University, China
W. Dong, Northeast Normal University, China

Analysis of the Soil Foodweb Structure on Organic- and Conventional Dairy Farms

N. van Eekeren, Louis Bolk Institute, The Netherlands
F. Smeding, Louis Bolk Institute, The Netherlands
A. J. Schouten, RIVM, The Netherlands

The Effect of Forage Legumes on Mineral Nitrogen Content in Soil

M. Isolahti, MTT Agrifood Research, Finland
A. Huuskonen, MTT Agrifood Research, Finland
M. Tuori, Helsinki University, Finland
Oiva Nissinen, MTT Agrifood Research, Finland
R. Nevalainen, MTT Agrifood Research, Finland

Field Experiments to Help Optimise Nitrogen Fixation by Legumes on Organic Farms

A. Joynes, Institute of Grassland and Environmental Research, UK
D. J. Hatch, Institute of Grassland and Environmental Research, UK
A. Stone, Institute of Grassland and Environmental Research, UK
S. Cuttle, Institute of Grassland and Environmental Research, UK
G. Goodlass, ADAS, UK

Effects of Applied Quantity of Phosphorus Fertiliser on Phosphorus Content in Plant Tissues of Lucerne (Medicago sativa) and Seed Yield in North-western China

Y. W. Wang, China Agricultural University, China
J. G. Han, China Agricultural University, China
S. M. Fu, Chengdu Daye International Investment Co. Ltd., China
Y. Zhong, Chengdu Daye International Investment Co. Ltd., China

Cool-Season Grass Response to Increasing Nitrogen Fertiliser Rates in Michigan

R. H. Leep, Michigan State University
T. S. Dietz, Michigan State University
D. H. Min, Michigan State University

Within Resting Period Seasonal Soluble Carbohydrate Profiles of Rotationally Grazed Elephant Grass

L. P. Passos, EMBRAPA, Brazil
M. C. Vidigal, EMBRAPA, Brazil
I. G. Perry, EMBRAPA, Brazil
Fermino Deresz, EMBRAPA, Brazil
F. B. de Sousa, EMBRAPA, Brazil

The Role of Grass Tussocks in Maintaining Soil Condition in North East Australia

B. K. Northup, USDA-ARS
J. R. Brown, USDA-NRCS

Effect of a Grazing Intensity Gradient on Primary Production and Soil Nitrogen Mineralisation in a Humid Grassland of Western France

N. Rossignol, CNRS, France
A. Bonis, CNRS, France
J-B. Bouzillé, CNRS, France

Diet Effects on Dairy Manure Nitrogen Excretion and Cycling

J. M. Powell, USDA, Agricultural Research Service
T. H. Misselbrook, Institute of Grassland and Environmental Research, UK

How Will Removal of the Non-Organic Feed Derogation Affect Nutrient Budgets of Organic Livestock Farms in Wales?

H. McCalman, Institute of Grassland and Environmental Research, UK
S. P. Cuttle, Institute of Grassland and Environmental Research, UK

The Effect of a Reduction in Phosphate Application on Soil Phosphate Pools

C. van der Salm, Wageningen University and Research Centre, The Netherlands
J. van Middelkoop, Animal Science Group, The Netherlands
P. A. I. Ehlert, Wageningen University and Research Centre, The Netherlands

Changes in Nutrient Turnover and Supply During the Reversion of Arable Land to Acid Grassland/Calluna Heathland

A. Bhogal, ADAS Gleadthorpe Research Centre, UK
B. J. Chambers, ADAS Gleadthorpe Research Centre, UK
R. Pywell, Centre for Ecology and Hydrology, UK
K. Walker, Centre for Ecology and Hydrology, UK

Study of Dairy Manure N Cycling in Soil-Plant Continuum Using 15N and Other Methods

J. M. Powell, USDA, Agricultural Research Service
P. R. Cusick
K. A. Kelling

Nitrogen Leaching from Cattle, Sheep and Deer Grazed Pastures in New Zealand

Keith Betteridge, AgResearch, New Zealand
Sterwart F. Ledgard, AgResearch, New Zealand
Coby J. Hoogendoorn, AgResearch, New Zealand
M. G. Lambert, AgResearch, New Zealand
Z. A. Park, AgResearch, New Zealand
Des A. Costall, AgResearch, New Zealand
P. W. Theobald, AgResearch, New Zealand

Effect of Soil Chemistry on Microbial Biodiversity and Functionality in Grassland and Tilled Soils

C. Carrigg, National University of Ireland, Galway
S. Kavanagh, National University of Ireland, Galway
D. Fay, Teagasc, Ireland
V. O. Flaherty, National University of Ireland, Galway

Effect of Different Carbon and Nitrogen Inputs on Soil Chemical and Biochemical Properties in Maize-Based Forage Systems in Northern Italy

S. Monaco, Università di Torino, Italy
D. Hatch, Institute of Grassland and Environmental Research, UK
L. Dixon, Institute of Grassland and Environmental Research, UK
C. Grignani, Università di Torino, Italy
D. Sacco, Università di Torino, Italy
L. Zavattaro, Università di Torino, Italy

Seasonal Changes in the Ratio of Microbial Biomass P to Total P in Soils of Grazed Pastures

M. Kaneko, Tokyo University of Agriculture & Technology, Japan
Y. Kurokawa, Tokyo University of Agriculture & Technology, Japan
H. Tanaka, Tokyo University of Agriculture & Technology, Japan
S. Suzuki, Tokyo University of Agriculture & Technology, Japan

Nitrogen Mineralisation in Situ and in Controlled Environment

F. Pálmason, The Agricultural Research Institute, Iceland

N-mineralisation and Phosphorous: Important Elements in Decision Support for Grassland Systems

A. L. Nielsen, Agro Business Park, Denmark
C. C. Hoffmann, National Environmental Research Institute, Denmark

Implications for N Transformations in Acidic Soils of Replacing Annual-Based Legume Pastures with Lucerne-Based Pasture in Dryland Farming Systems of Southern Australia

I. R. P. Fillery, CSIRO Plant Industry, Australia

Characterisation of Soil Organic Matter from Pensacola Bahiagrass Pastures Grazed for Four Years at Different Management Intensities

J. C. B. Dubeux Jr., Universidade Federal Rural de Pernambuco, Brazil
Lynn E. Sollenberger, University of Florida
N. B. Comerford, University of Florida
Ana C. Ruggieri, Instituto de Zootecnia, Brazil
K. M. Portier, University of Florida

Organic Matter Transformation Processes of Soils in Native Steppe Grass Communities

E. Forró, Corvinus University of Budapest, Hungary

Study of Soil Characteristics to Estimate Sulphur Supply for Plant Growth

M. Mathot, Catholic University of Louvain, Belgium
R. Lambert, Catholic University of Louvain, Belgium
B. Toussaint, Catholic University of Louvain, Belgium
A. Peeters, Catholic University of Louvain, Belgium

Total Sulphur Content and N:S Ratio as Indicators for S Deficiency in Grasses

M. Mathot, Catholic University of Louvain, Belgium
R. Lambert, Catholic University of Louvain, Belgium
B. Toussaint, Catholic University of Louvain, Belgium
A. Peeters, Catholic University of Louvain, Belgium

Supplementation of Cattle with Rock Phosphate and Urea Treated Straw to Improve Manure Quality and Crop Yields in the Sahel Zone of Senegal

Maimouna Cissé, Senegalese Institute of Agricultural Research, Senegal
M. N’Diaye, Senegalese Institute of Agricultural Research, Senegal
C. M. N’Dione, Senegalese Institute of Agricultural Research, Senegal

Nitrogen Response of Spring and Winter Wheat to Biosolids Compared to Chemical Fertiliser

W. Kato, Teagasc, Ireland
O. T. Carton, Teagasc, Ireland
D. McGrath, Teagasc, Ireland
H. Tunney, Teagasc, Ireland
W. E. Murphy, Teagasc, Ireland
P. O'Toole, University College Dublin, Ireland

SAFE - a Tool for Assessing the Sustainability of Agricultural Systems: an Illustration

X. Sauvenier, Laboratoire d’Ecologie des Prairies UCL, Belgium
C. Bielders, Unité de Génie Rural, UCL Belgium
M. Hermy, Laboratorium voor Bos, Natuur en Landschap, Belgium
E. Mathijs, KUL, Belgium
B. Muys, Laboratorium voor Bos, Natuur en Landschap, Belgium
J. Valckx, Laboratorium voor Bos, Natuur en Landschap, Belgium
N. Van Cauwenbergh, Unité de Génie Rural, UCL Belgium
M. Vanclooster, Unité de Génie Rural, UCL Belgium
E. Wauters, KUL, Belgium
A. Peeters, Laboratoire d’Ecologie des Prairies UCL, Belgium

Improving Nutrient Supply of Grassland Soil

G. Füleky, Szent István University, Hungary
M. Orbán, LAM Alapítvány, Romania

Assessment of Nitrogen Nutrition Status of Grasses under Water Deficit and Recovery

V. G. Dugo, INRA, France
Jean-Louis Durand, INRA, France
F. Gastal, INRA, France

Denitrification under Pastures on Permeable Soils Helps Protect Ground Water Quality

M. P. Russelle, USDA-Agricultural Research Service
B. A. Browne, University of Wisconsin-Stevens Point
N. B. Turyk, University of Wisconsin-Stevens Point
B. Pearson, University of Wisconsin-Stevens Point

Phosphorus Transfer to River Water from Grassland Catchments in Ireland

H. Tunney, Teagasc, Ireland
P. Jordan, University of Ulster, UK
G. Kiely, University College, Ireland
R. Moles, University of Limerick, Ireland
G. Morgan, University College, Ireland
P. Byrne, University of Limerick, Ireland
W. Menary, University of Ulster, UK
K. Daly, Teagasc, Ireland

Maximising Slurry Crop Available Nitrogen Utilisation in Grassland Systems

J. R. Williams, ADAS Boxworth, UK
E. Sagoo, ADAS Boxworth, UK
B. J. Chambers, ADAS Gleadthorpe, UK
J. Laws, IGER North Wyke, UK
D. R. Chadwick, IGER North Wyke, UK

Fire and Nutrient Cycling in Shortgrass Steppe of the Southern Great Plains, USA

P. L. Ford, USDA Forest Service
C. S. White, University of New Mexico

Soil Aggregate Dynamics, Particulate Organic Matter and Phosphate under Dryland and Irrigated Pasture

J. T. Scott, AgResearch, New Zealand
L. M. Condron, AgResearch, New Zealand
R. W. McDowell, AgResearch, New Zealand

Fine Colloids ‘Carry’ Diffuse Water Contaminants from Grasslands

P. M. Haygarth, Institute of Grassland and Environmental Research Station, UK
A. L. Heathwaite, The Lancaster Environment Centre, UK

Leaching Losses of N, P and K from Grazed Legume Based Swards: Some Preliminary Results

E. R. Dixon, Institute of Grassland and Environmental Research, UK
A. C. Stone, Institute of Grassland and Environmental Research, UK
D. Scholefield, Institute of Grassland and Environmental Research, UK
D. J. Hatch, Institute of Grassland and Environmental Research, UK

Nitrogen Dynamics Following the Break-up of Grassland on Three Different Sandy Soils

Manfred Kayser, University of Göttingen, Germany
K. Seidel, University of Göttingen, Germany
J. Müller, University of Göttingen, Germany

Mechanical Aeration and Liquid Dairy Manure: Application Impacts on Grassland Runoff Water Quality and Yield

T. J. Basden, West Virginia University Extension Service
S. B. Shah, West Virginia University Extension Service
J. L. Miller, West Virginia University Extension Service

Management Options to Reduce N-Losses from Ploughed Grass-Clover

J. de Wit, Louis Bolk Institute, The Netherlands
G. J. van der Burgt, Louis Bolk Institute, The Netherlands
N. van Eekeren, Louis Bolk Institute, The Netherlands

Rangeland Ecological Management Counter-Measures Study of Xinjiang

H. X. Cui, Grassland Research Institute of Xinjiang Animal Science Academy, China
J. Li, Grassland Research Institute of Xinjiang Animal Science Academy, China
S. Asiya, Grassland Research Institute of Xinjiang Animal Science Academy, China
J. L. Zhang, Grassland Research Institute of Xinjiang Animal Science Academy, China
Jialin, Grassland Research Institute of Xinjiang Animal Science Academy, China

Green Dairy, a Project for Environmental Friendly and Sustainable Dairy Systems in the Atlantic Area

H. Chambaut, Institut de l’Elevage, France
A. Pflimlin, Institut de l’Elevage, France
C. Raison, Institut de l’Elevage, France

Constraints to Pastoral Systems in Marginal Environments

Andrew A. Ash, CSIRO Sustainable Ecosystems, Australia
J. G. McIvor, CSIRO Sustainable Ecosystems, Australia