Reclamation of saline soils through revegetation in Australia:plants,processes and people
Key points:Secondary salinity ( salinity induced by human activity) is a major world problem. Hydrological imbalances in landscapes cause watertables to rise, drawing salt from deeper in the soil profile to the soil surface, where the combined stresses of salinity and waterlogging threaten the growth of crops and pastures. The reversal of salinity by the broad‐scale reintroduction of perennial plants back into landscapes may not be economically feasible, but watertables may be at least partly directly drawn‐down by the growth of salt tolerant plants ( halophytes) on saltland. This review summarises data from Australia in which the water use by perennial halophytes has been sufficient to facilitate the growth of the less salt tolerant under‐storey legumes balansa clover ( T ri f olium michelianum ) and burr medic ( Medicago polymorpha ). Although the halophytes may have undesirable nutritive value traits, these plants, mixed with the under‐storey species are then able to be utilised profitably by grazing sheep.
Salinity waterlogging water‐use forage nutritive‐value
E.G.Barrett-Lennard
Department of Agriculture and Food of WA,Centre for Ecohydrology (M087 ),University of Western Australia,Nedlands,WA,6009 Australia;Future Farm Industries CRC,University of Western Australia,Nedlands,WA,6009 Australia
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）