|Book Group Author:||NA|
Critical water shortages are occurring in urban areas of the western states of the USA, resulting in restrictions on potable water use for irrigating turf-grass landscapes. Secondary saline water sources such as reclaimed effluent, brackish groundwater, etc., are increasingly prescribed for turf-grass irrigation. Fresh water aquifer declines have become serious in many western states. In Arizona, the major aquifers have dropped 100 m during the past 40 years, and are becoming saline due to overdraft and recharge with reclaimed effluent. Riparian ecosystems have disappeared, and land subsidence is resulting in urban infrastructure problems. Salinity injury is commonly seen on turf-grasses in the southwestern USA - especially on overseeding (C3) grasses. Secondary problems related to sodicity and carbonates are of even greater concern, resulting in compaction and loss of permeability and leaching potential in irrigated turf soils. Turf-grass physiological responses associated with salinity tolerance that may be useful selection criteria in breeding, are identified as:- (i) Growth parameters for shoots and roots; (ii) Osmotic and ion relations such as shoot ion relations, osmotic adjustment, saline ion excretion and compatible solutes.
|Pages:||307 - 310|
|Journal:||International salinity forum - managing saline soils andwater: science, technology and social issues. Oral PresentationAbstracts, Riverside Convention Center, Riverside, California, USA,25-28 April 2005|
aquifers, brackish water, environmental impact, irrigationwater, lawns and turf, leaching, permeability, plant breeding, roots,saline water, salinity, salt tolerance, shoots, soil compaction,solutes, toxicity, urban areas, water resources, water reuse, Arizona,Mountain States of USA, Western States of USA, USA, North America,America, Developed Countries, OECD Countries, Southwestern States ofUSA, environmental tolerance, groundwater recharge???, ionicstrength????, land subsidence???, osmotic pressures, riparianecosystems????, saline intrusion???, sodicity, water shortages,environmental effects, lawns and sports turf, salt water, HorticulturalCrops (FF003) (New March 2000), Plant Physiology and Biochemistry(FF060), Environmental Tolerance of Plants (FF900), Water Resources(PP200), Pollution and Degradation (PP600), Soil Fertility (JJ600),Plant Ecology (ZZ331), Plant Breeding and Genetics (FF020)