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The buckwheat (Fagopyrum esculentum Moench), also known as buckwheat have excelled with choice of ground cover, as it is a plant able to extract P from mineral water and insoluble phosphates in weak acids, through mechanisms that promote the formation of humofosfatos culture-like. On the above, the present study aimed to evaluate the growth, the accumulation of nutrients, absorption and use efficiency of phosphorus by plants of buckwheat in response to different doses and soluble P sources from soils of the Amazon West. The experiment was carried out in protected environment of the Colorado do Oeste municipally, Rondônia State, Brazil. The experimental design used was the blocks randomized design in factorial scheme 5x2, and five rates (0, 40, 80, 120 and 160 kg ha-1 de P2O5) and two sources of P (SFS (21% P2O5) e o SFT (41% P2O5)). The results conclude that the increase in doses of soluble P increased the level and content of P in the tissues of buckwheat plants; and that the species of buckwheat impose potential soil P extraction and may stands out as important species. There was no effect of different phosphorus sources on any of the variables studied.

DOSES E FONTES DE FÓSFORO SOBRE O COMPORTAMENTO DE PLANTAS DE TRIGO SARRACENO