The Influence of Trickle Irrigation on the Quality of Irrigation Return Flow.

摘要

The influence of trickle irrigation on the quality of irrigation return flow was investigated in a field study and by means of computer simulation models. Six undisturbed buried monolith lysimeters were utilized to quantify the leachate from treatment including two different qualities of irrigation water applied through a trickle irrigation system. Both moisture and salt balances were followed inside and outside the lysimeters during a growing season the remainder of the calendar year. A sorghum crop was grown on the lysimeters and in the adjacent area. Irrigation was scheduled based on pan evaporation losses. Yield and growth data indicated that the plant root environments inside and outside lysimeters were relatively comparable. Nitrogen,saline water and irrigation treatments did not significantly influence growth and yields of sorghum in 1974.