نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار پژوهش موسسه تحقیقات خاک و آب
2 دانشیار بازنشسته دانشکده کشاورزی دانشگاه تهران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Knowledge of the soil infiltration parameters and infiltration variation is necessary for efficient furrow irrigation. This experiment was conducted in the experimental farm of Tehran University at Karaj in 2002. The method used for determination of the basic infiltration rate was Inflow-Outflow. The basic infiltration rate and cumulative infiltration were determined on twelve irrigation events. The beds were planted with maize and divided into 3 plots each consisting of the three neighboring furrows. The outer furrows in each plot were used as guard rows and all measurements were taken on the center furrow. Results showed that the basic infiltration rate decreased during the season. At the end of season, the soil basic infiltration rate decreased about 34% as compared to the beginning. Also application efficiency decreased during the period. At the end of season, the application efficiency (AE) decreased about 10% as compared to the beginning of period. For achieving proper management with considering seasonal decrease of infiltration, time of irrigation must be increased.
کلیدواژهها [English]