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Marcha de absorção de nutrientes pelo rami 'Miyasaki' conduzido em casa de vegetação Nutrient uptake by ramie 'Miyasaki' grown under greenhouse conditions

By Ruter Hiroce, Romeu Benatti Júnior, Mamor Fujiwara and Edison Martins Paulo

Abstract

Os acúmulos de matéria seca e de nutrientes pelo rami, Boehmeria nívea 'Miyasaki', em ensaio conduzido em casa de vegetação, na presença e na ausência de adubação NPK, foram estudados em cinco idades do seu desenvolvimento: aos 30, 45, 60, 75 e 90 dias. As plantas do tratamento sem adubo cessaram de crescer após 60 dias de idade, provavelmente devido à insuficiência de N, P, K e S, e produziram matéria seca em quantidade 25 vezes menor que a do tratamento adubado. Os teores de N, P e K dos componentes da parte aérea da planta adubada e os de Cu das folhas, de modo geral, diminuíram com a idade das plantas até aos 90 dias, enquanto os de Ca das folhas aumentaram até aos 75 dias. A folha foi o órgão onde houve concentrações mais elevadas de nutrientes, sendo o Ca encontrado na concentração mais elevada (5,87%) e o Cu, na mais baixa (5,6 ppm). Aos 90 dias de idade, a planta acumulou 126,7g de matéria seca, sendo 1.015,4mg de nitrogênio, 126,8mg de fósforo, 1.382,8mg de potássio, 3.035,3mg de cálcio, 341,4mg de magnésio, 65,4mg de enxofre, 3,50mg de boro, 0,45mg de cobre, 21,45mg de ferro, 33,11mg de manganês e 2,51mg de zinco.<br>Ramie plante (Boehmeria nipea 'Miyasaki') were grown in a greenhouse, with and without NPK fertilization, to study the accumulation of dry matter and nutriente during five plant stages: 30, 45, 60, 75 and 90 days of age. Plante treated without fertilizei did not grow after 60 days of age probably due to insufficient N, P and K levels and had a dry matter production twenty five times lower than that of ferilized plante. The concentrations of N, P and K in the parts of the fertilized plants, and of Cu in the leaves, decreased with plant age up to 90 days, whereas Ca in the leaves increased up to 75 days of age. Highest nutrient concentrations were found in the leaves: Ca was the most concentrated one (5.87%) whereas Cu was the least (5.6 ppm). At 90 days of age, the ramie plants accumulated 126.7g of dry matter, 1015.4mg of N, 126.8mg of P, 1382.8mg of K, 3035.3mg of Ca, 341.4mg of Mg, 65.4mg of S, 3.50mg of B, 0.45mg of Cu, 21.45mg of Fe, 33.11mg of Mn and 2.51mg of Zn

Topics: rami, Boehmeria nívea 'Miyasaki', nutrientes absorvidos, ramie, Boehmeria nipea, nutriente absorbed, Agriculture (General), S1-972, Agriculture, S, DOAJ:Agriculture (General), DOAJ:Agriculture and Food Sciences, Geology, QE1-996.5, Science, Q, DOAJ:Earth Sciences, DOAJ:Earth and Environmental Sciences
Publisher: Instituto Agronômico de Campinas
Year: 1985
DOI identifier: 10.1590/S0006-87051985000200015
OAI identifier: oai:doaj.org/article:a2f05f1aaa374b89b8baa584ccae8b1d
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