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    Issues and options in high country farming: 4. Cycling nutrients for sustainable management

    O' Connor, K. F.; Nordmeyer, A. H.
    Abstract
    Nutrient balances are recognised as the key to understanding the environmental context for sustainable management in pastorally used mountain lands and for monitoring possible effects of pastoral practices on the life-supporting capacity of soil. The paper draws on a larger survey of recent and current soil fertility research in the high country to examine briefly, three themes in nutrient cycling. The role of nutrient accessions to open systems is recognised for improved range. Current long-term revegetation studies show the need to take account of income from rock weathering. The importance of understanding the role of different plant species, soil amendments and pastoral practices in activating or impeding nutrient cycling proper is indicated from recent studies involving monitoring of exchangeable aluminium, comparing lupins with other legumes and studying the effects of planted conifers on the mineralisation of grassland organic matter. The dimensions and magnitudes of grazing induced nutrient transfers are outlined in relation to their risks of loss from periodic hydrologic events, as well as recognising the roles of pasture improvement and grazing management in accelerating nutrient cycling.... [Show full abstract]
    Keywords
    aluminium; grazing transfers; mineralisation; nutrient balances; nutrient cycling; rock weathering; sustainable management
    Fields of Research
    0503 Soil Sciences; 070108 Sustainable Agricultural Development
    Date
    1996
    Type
    Conference Contribution - Published (Conference Paper)
    Collections
    • Department of Agricultural Sciences [1407]
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    o'connor_nordmeyer_1996.pdf
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    Copyright © The Authors and New Zealand Grassland Association.
    Citation
    O' Connor, K. F. & Nordmeyer, A. H. (1996). Issues and options in high country farming: 4. Cycling nutrients for sustainable management. Proceedings of the New Zealand Grassland Association, 58, 153-159
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