The nutritional limitations of an organic soil supporting a lowland rice crop, cv. Inca, were identified in a greenhouse experiment in Lavras, State of Minas Gerais, from December, 1994, to June, 1995. Soil samples were collected in Northern Fluminense region. Treatments consisted of control (natural soil), complete (N, P, K, limestone, S, B, Co, Cu, Mo, and Zn) and complete lacking one of these nutrients at a time. At the grain maturation time, the treatments lacking N and K showed a shoot dry matter decrease of 28 and 24%, respectively, compared to the complete treatment. No decrease was observed in the absence of P, S, limestone and micronutrients. The absence of N, K and Zn resulted in a lower accumulation of these nutrients in shoot dry matter when compared to the complete treatment.
nutritional constraint; lowland; organic soil; Oryza sativa