Two experiments (incubation and greenhouse) were carried out in end of 2018 to evaluate the addition effect of glauconite rock rates on the release of K and some chemical properties as well as the uptake of potassium by wheat plants of sandy soil. Glauconite mineral rates (0, 3, 6, and 9 g kg-1) were mixed with 300 g (w/w) soil in plastic pot, and then the distilled water was added to the field capacity of soil and incubation for four time periods (0, 30, 60, 90, and 120 days). The results indicated that, glauconite rates resulted in significant increases in the available K of studied sandy soil compared to the control treatment. These increases depended upon the application rate and the time of incubation. Additions of glauconite rates and incubation periods caused increases in most soil K forms (soluble, exchangeable, non-exchangeable, residual of K) of the studied soil samples. Also, soil pH values of treated soils decreased with increasing the applied rate of glauconite and incubation periods. On other side, the soil salinity (EC) and cation exchange capacity (CEC) were increased compared to the control treatment. The dry weight, concentration and uptake values of K were significantly increased with increasing the level of glauconite by wheat plant compared to the control treatment.
Key Words: Potassium, Glauconite, Incubation, Sandy soils.
Two experiments (incubation and greenhouse) were carried out in end of 2018 to evaluate the addition effect of glauconite rock rates on the release of K and some chemical properties as well as the uptake of potassium by wheat plants of sandy soil. Glauconite mineral rates (0, 3, 6, and 9 g kg-1) were mixed with 300 g (w/w) soil in plastic pot, and then the distilled water was added to the field capacity of soil and incubation for four time periods (0, 30, 60, 90, and 120 days). The results indicated that, glauconite rates resulted in significant increases in the available K of studied sandy soil compared to the control treatment. These increases depended upon the application rate and the time of incubation. Additions of glauconite rates and incubation periods caused increases in most soil K forms (soluble, exchangeable, non-exchangeable, residual of K) of the studied soil samples. Also, soil pH values of treated soils decreased with increasing the applied rate of glauconite and incubation periods. On other side, the soil salinity (EC) and cation exchange capacity (CEC) were increased compared to the control treatment. The dry weight, concentration and uptake values of K were significantly increased with increasing the level of glauconite by wheat plant compared to the control treatment.
Key Words: Potassium, Glauconite, Incubation, Sandy soils.
Two experiments (incubation and greenhouse) were carried out in end of 2018 to evaluate the addition effect of glauconite rock rates on the release of K and some chemical properties as well as the uptake of potassium by wheat plants of sandy soil. Glauconite mineral rates (0, 3, 6, and 9 g kg-1) were mixed with 300 g (w/w) soil in plastic pot, and then the distilled water was added to the field capacity of soil and incubation for four time periods (0, 30, 60, 90, and 120 days). The results indicated that, glauconite rates resulted in significant increases in the available K of studied sandy soil compared to the control treatment. These increases depended upon the application rate and the time of incubation. Additions of glauconite rates and incubation periods caused increases in most soil K forms (soluble, exchangeable, non-exchangeable, residual of K) of the studied soil samples. Also, soil pH values of treated soils decreased with increasing the applied rate of glauconite and incubation periods. On other side, the soil salinity (EC) and cation exchange capacity (CEC) were increased compared to the control treatment. The dry weight, concentration and uptake values of K were significantly increased with increasing the level of glauconite by wheat plant compared to the control treatment.