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Farm tree recruitment and grazing systems

This study examines the relationship between farm tree recruitment and grazing systems. It utilizes generalized linear models to identify factors that influence tree recruitment and density. The results show that the grazing system, tree species, shrub density, and slope position all play a role in tree recruitment. The study suggests management strategies to increase tree recruitment, such as resting selected paddocks, switching from sheep to cattle grazing, and planting native shrubs under trees.

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Farm tree recruitment and grazing systems

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  1. Farm tree recruitment and grazing systems Kenneth Hodgkinson, Warren Mueller & Yanhua Zhang

  2. Methods Roads in the study area were travelled. Where tree recruitment was observed, three or more contrasting sites were measured (28 attributes), giving a total of 325 sites. Using 19 of the attributes, explanatory generalized linear models were built by forward step-wise regression. Farm tree recruitment and grazing systems | Kenneth Hodgkinson

  3. Probabilityof tree recruitment can be managed by the grazing system Probability of recruitment is • highest when there is no grazing and when cattle rather than sheep are grazing • more likely at the bottom of slopes - water and nutrients are highest here • more likely at higher shrub densities • influenced by tree species-dependant variables Farm tree recruitment and grazing systems | Kenneth Hodgkinson

  4. Density of tree recruits is grazing system dependant Density of tree recruits is • highest when there is no grazing and when sheep rather than cattle are grazing (not expected) • at higher at low to mid-altitudes • influenced by tree species- dependant variables Farm tree recruitment and grazing systems | Kenneth Hodgkinson

  5. Conclusions Recruitment of paddock trees may be increased by opportunistic resting of selected paddocks after seed is released from capsules switching from sheep to cattle planting/sowing native shrubs under trees Farm tree recruitment and grazing systems | Kenneth Hodgkinson

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