Dryland salinity in south-western Australia: its origins, remedies, and future research directions

摘要: Replacement of deep-rooted, perennial native vegetation with shallow-rooted, annual agricultural plants has resulted in increased recharge causing shallow saline water tables leading to dryland salinity and loss production. Restoring the by regeneration or replanting lowers levels locally but field evidence computer modelling suggests this needs be widespread for regional effects, which conflicts future conventional agriculture. Alley farming allows agriculture continued bays between rows, as much perennial, preferably possible achieve required reductions. Where asset preserved is valuable a means safe effluent disposal exists, pumps drains will part any management system, where these conditions are not met they limited use on an economic basis. To limit spread substantial change systems farmers need assurance that recommended strategies have desired effect. Computer only timely way do this. An operationally simple 1-dimensional model already 2-dimensional one under development testing. Three-dimensional also probably support strategic, intensive interventions.