ABSTRACT: Shifting cultivation with low fire intensity is widely practiced in Kyushu mountains, Japan. For investigating the effects of low intensity burning on chemical properties of soils, samples from the burned and unburned area of a field in Shiiba Village in Kyushu mountains were collected and analyzed. The growth and leaf mineral contents in buckwheat grown in burned and unburned areas were also measured. Results indicated that soil pH, available P, exchangeable K and Mg in the soil increased, though inorganic N was not affected by the burning. The plant growth was enhanced due to burning. However, only leaf P content was increased by the burning though leaf K and Mg contents were not changed. The effect of increased soil pH on buckwheat growth was unclear. Even the low intensity burning increased available P and increased the growth of buckwheat in Kyushu mountains under shifting cultivation.
Keywords: Available P, exchangeable base, Fagopyrum esculentum, slash and burn cultivation, soil pH
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