نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه شهرکرد
2 دانشیار گروه خاکشناسی، دانشکده کشاورزی، دانشگاه تبریز
3 دانشیار گروه آبیاری و آبادانی
4 دانشکده کشاورزی، دانشگاه تهران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Infiltration is one of the most important parameters in irrigation performance. Also farm management affects this parameter directly. In this research the effect of two farm managements on furrow basic infiltration rate (f0) is evaluated in a clay-loam soil. In this study, there were four treatments with three replications in a randomized complete block test. Measurements of f0 were done at the initial, middle and final stages of the season. Blocked furrow method and inflow-outflow method were used for measurement of f0. Based on the results there is no significant difference between the treatments in the beginning and the end of the season. But there is a significant difference in value of f0 in the middle of season. The value of f0 with a 99% level of significance in planted furrows is greater than in non-planted furrows, being the same for both the mulched soil and unmulched soil. It was concluded that only the presence of plants cause this effect. On the other hand, plant roots create some preferential paths which carry water down more rapidly than the soil profile without roots. Also it shows that the f0 in mulched soil is significantly greater than that of the unmalched soil only in the middle of season. These changes are caused by improved soil porosity because of increases in soil organic matter. The results show that the f0 measurement method will have an affect on the value of the f0. However, this effect won’t change the treatment behavior.
کلیدواژهها [English]
Walker, W. R., and Skogerboe, G. V., 1987, Surface Irrigation: Theory and Practice. Prentice Hall, Inc, Englewood Cliffs, N. J.