Effect Of Natural Zeolite, Humic Acid And Cow Manure Treatments On Phosphorous Speed Release And Availability In Sandy Soils

Abstract

A laboratory experiment was conducted at the University of Kufa, College of Agriculture/ Department of Soil and Water Sciences, to study the effect of natural zeolite, humic acid and cow manure on the speed of phosphorous release in sandy soils. The experiment included the use of plastic pots with a size of 1/2 kg and sandy soil mixed from the Fadak desert farm belonging to Ali's holy shrine investment. The treatments were natural zeolite 1.5 g/pot, humic acid 4.5 ml/pot, or cow waste 9.42 g/pot with 30 anvils for each treatment. In addition to the control treatment, with 120 total pots. The treatments were randomly distributed according to (RCBD) and the speed of phosphorous release was calculated after an incubation period of (120, 60, 30, 15.1 hours) at different temperatures 20, 30 or 40 C°. The results showed that the addition of natural zeolite led to raising the values of the interaction degree of sandy soil from (7.73 to 8.13), reducing the EC of sandy soil from 49.3 to 41.5 decimens m-1. On the other hand, the highest rate of ready phosphorus in sandy soils was (43.37) mg kg-1 in the treatment of Natural zeolite after an incubation period of 1 hour at 40 C°, compared to the other highest values of 30.77 mg kg-1 in the treatment of humic acid after the same incubation period at the same temperature, and 27 mg kg- 1 in the treatment of cow manure after 1-hour incubation at 20 C°.