Changes in Different Forms of Potassium and Clay Minerals in Soils as Influenced by Different Aged Orange Trees (Citrus sinensis) in Darab, Fars Province

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SHAHROKH V.; KHADEMI H.; SHARIATMADARI H.

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Journal: Journal of Water and Soil Science Year:2019 | Volume:23 | Issue:2 Page(s): 13-26

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Title

Changes in Different Forms of Potassium and Clay Minerals in Soils as Influenced by Different Aged Orange Trees (Citrus sinensis) in Darab, Fars Province

Author(s)

SHAHROKH V. | KHADEMI H. | SHARIATMADARI H. | Issue Writer Certificate

Keywords

PotassiumQ2

RhizosphereQ2

Clay mineralsQ2

Orange orchard (Citrus Sinensis)Q3

Abstract

Despite the great importance of Potassium applied as a fertilizer in the orange orchards, no information is currently available regarding the rate of Potassium release from Rhizosphere and the bulk soils of such trees. The objectives of this study were to investigate the weathering of micaceous minerals and their non-exchangeable K release and also, to examine the status of different forms of K in the Rhizosphere and bulk soils of orange orchards with different ages in Darab, Fars Province. Samples were, accordingly, taken from the Rhizosphere and bulk soils of orange orchards with the ages of 5, 10 and 20 years; also, virgin soils (control) were obtained from three soil depths including 0– 30, 30– 60, and 60– 100 cm. Water soluble, exchangeable and nonexchangeable K, and the clay mineralogy of the soils were determined. The results demonstrated that the concentration of soluble and exchangeable K in the cultivated soils was less than that in the control soil and that the concentration of nonexchangeable K in the soils of 20-year-old orchards was less, than that in other soils. Soluble and exchangeable K values decreased with depth in all soils. Clay mineralogy investigation also showed that the quantity of illite decreased and that of smectite and illite-smectite increased as the age of orange trees was raised. With increasing the age of orange trees and root development, more Potassium could be taken up from soil and more changes occurred in the soil minerals. In order to avoid a very high decline in the reserved K in the soils under orange trees, particularly in the orchards with older trees, K fertilization has to be taken more seriously based on the soil testing results.

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APA: Copy

SHAHROKH, V., KHADEMI, H., & SHARIATMADARI, H.. (2019). Changes in Different Forms of Potassium and Clay Minerals in Soils as Influenced by Different Aged Orange Trees (Citrus sinensis) in Darab, Fars Province. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), 23(2 ), 13-26. SID. https://sid.ir/paper/395025/en

Vancouver: Copy

SHAHROKH V., KHADEMI H., SHARIATMADARI H.. Changes in Different Forms of Potassium and Clay Minerals in Soils as Influenced by Different Aged Orange Trees (Citrus sinensis) in Darab, Fars Province. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES)[Internet]. 2019;23(2 ):13-26. Available from: https://sid.ir/paper/395025/en

IEEE: Copy

V. SHAHROKH, H. KHADEMI, and H. SHARIATMADARI, “Changes in Different Forms of Potassium and Clay Minerals in Soils as Influenced by Different Aged Orange Trees (Citrus sinensis) in Darab, Fars Province,” WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), vol. 23, no. 2 , pp. 13–26, 2019, [Online]. Available: https://sid.ir/paper/395025/en

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