|Author:||Cahn, M. D. ; Ajwa, H. A.|
|Book Group Author:||NA|
Growers on the Central Coast of California face a number of challenges in managing salinity. The intrusion of seawater has increase salinity levels of the groundwater near the coast, forcing growers to drill new wells or blend saline water with other supplies. In an effort to reduce the drawdown of the coastal aquifer, 5000 hectares of agricultural land are being irrigated with water reclaimed from urban sewage. The high salt content of this reclaimed water (ECw about 1.6 dS/m) could potentially salinize agricultural soils. The study found that elevated levels of salinity in the irrigation water reduced carton yield and biomass of both varieties during the 2003 and 2004 seasons. Both cultivars responded similarly to the salinity treatments, but the Salinas variety had a higher loss in carton yield and biomass than the Sniper variety. A regression analysis of data from both varieties indicated that a 10% yield loss of 24-size heads occurred when the salinity level of water was greater than 1.8 dS/m.
|Pages:||83 - 86|
|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|
agricultural land, agricultural soils, aquifers, biomass,coastal areas, crop yield, cultivars, irrigation water, regressionanalysis, saline water, salinity, salinization, salt tolerance, salts,sea water, sewage effluent, soil fertility, soil salinity, trickleirrigation, water quality, water reuse, water supply, wells, groundwater, lettuce, saltwater intrusion, Ulva lactacea, farmland, cultivatedvarieties, salt water, seawater, water composition and quality, watersupplies, Horticultural Crops (FF003) (New March 2000), EnvironmentalTolerance of Plants (FF900), Soil Fertility (JJ600), Soil WaterManagement (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management], Water Resources (PP200), Human Wastesand Refuse (XX300), Mathematics and Statistics (ZZ100)