Effect of long-term mineral fertilization on the particle-size distribution in acid brown forest soil of tea plantations in Russian subtripics | Влияние длительного применения минеральных удобрений на гранулометрический состав бурой лесной кислой почвы чайных плантаций субтропиков России
2009
Kozlova, N.V. | Malyukova, L.S., All-Russia Research and Development Inst. of Floriculture and Subtropical Crops, Sochi (Russian Fedeartion)
The work is aimed at studying the effect of long-term mineral fertilization under a field experiment in the Krasnodar Krai. The soil of the trial plot had a low content of humus, average availability of easily hydrolyzed nitrogen, high availability of labile phosphorus and potassium. An analysis of particle-size distribution of soil has confirmed it was generally inherited and determined by the composition of soil-forming materials – argillites. It was reliably shown that the long-term application of mineral fertilizers at high rates to acid brown forest soil of tea plantations resulted in the removal of fine-silt and clay particles from the upper horizons and the formation of texturally differentiated soil profiles. Agrolessivage was accompanied by a significant acidification of soils, humus transformation, and leaching of structure-forming elements (Ca, Fe). The combination of interrelated changes of properties of brown acid forest soil of tea plantation under long application at high rates of physiologically acid mineral fertilizer demonstrating their morphology by light clarification of horizon Apl color and textual differentiation of soil profile resulting in evolution towards the soils fundamentally differed from brown soils
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