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O experimento foi conduzido com o objetivo de determinar a concentração e acumulação de N, P e K no feijoeiro (cv. BR Ipagro 1 "macanudo") cultivado sob diferentes níveis de irrigação: Sem irrigação (SI); irrigação ao ser atingida a tensão matricial de 80kPa (I-80kPa) e; a 40 kPa (I-40kPa). Os resultados obtidos no florescimento indicam que a concentração de N (3,72%) não variou em relação aos níveis de irrigação utilizados. Para o P, diferiu entre o SI (0,23%) e os irrigados (0,30%). Para o K, diferiu entre o SI (0,73%) e o l-40kPa (1,16%). Na maturação fisiológica, a concentração de N nos grãos variou e apresentou média de 3,47%. Entretanto, para P (0,54%) e K (0,89%) não variou. As quantidades totais de N, P e K acumuladas diferiram entre o tratamento SI e os tratamentos irrigados e apresentaram médias de 62,4 e I23,8kg de N/ha, 8 e 18,8kg de P/ha e 23,7 e 50,7kg de K/ha, respectivamente, para SI e irrigados. This study was carried out with the objective to determine NPK concentration and accumulation of black beans (Phaseolus vulgaris L., BR Ipagro 1 "macanudo" varie ty) cultivated under different sprinkling irrigation levels. The three irrigation levels were: without irrigation (Wl), irrigation when matric potential reached 80kPa (I-80kPa) and 40kPa (I-40kPa). The results of the flowering sampling indicated that the N concentration (3.72%) was not affected by irrigation levels. Leaf concentration of P in the leaves were different between WI (0.23%) and the irrigated treatments (0.30%). In the maturity stage the N grains concentration changed with irrigation and presented average values of 3.47%. However. P (0.54%) and K (0.89%) grains concentrations were similar. The whole amount of NPK accumulated was different for WI and irrigated treatments. The average values of 62.4 and 123.8kg of N/ha, 8 and 18.8kg of P/ha and 23.7 and 50.7kg of K/ha, were observed for WI and irrigated treatments, respectively

Concentração e acumulação de nitrogénio, fósforo e potássio pelo feijoeiro cultivado sob diferentes níveis de irrigação