Salinity and Boron Control under High-Frequency Low-Volume Irrigation

摘要

A 3-year study of the accumulation of soluble salts and boron in a soil profile following trickle irrigation with well water is completed. Irrigation treatments consisted of three levels of water applications based on estimated evapotranspiration (ET) requirements of grape vines. Estimates of ET were obtained from soil data using a neutron (CPN) meter. Soil water potentials obtained by tensiometers at different soil depths provided information about soil water movement. Analyses of soil samples taken in late 1981 showed slow but continued salt and boron accumulation during irrigation periods. Plant samples showed boron accumulation in the grape leaves during the irrigation season. Grape yields in 1982 responded to the higher irrigation levels and yields were considerably larger than the local area average.