Concentração de micronutrientes em mudas de maracujazeiro-doce propagado por sementes em função da calagem

Abstract

RESUMOConduziu-se este experimento em casa-de-vegetação visando avaliar a concentração de micronutrientes pelo maracujazeiro-doce (Passiflora alata Curtis) propagado por sementes em função da calagem. Utilizou-se o delineamento experimental de blocos casualizados em esquema fatorial (4 x 2) + 2, com quatro repetições. Os tratamentos envolveram quatro níveis de saturação por bases (40, 60, 80 e 100%), duas classes de solo (LATOSSOLO VERMELHO AMARELO Distrófico -LVAd e LATOSSOLO VERMELHO Distrófico -LVd), e dois tratamentos adicionais (LVAd sem calagem e LVd sem calagem). Aos 150 dias, determinaram-se o peso de matéria seca da parte aérea e o teor de micronutrientes. Concluiu-se que o aumento do nível de saturação por bases reduziu os teores de Cu, Mn e Zn na matéria seca da parte aérea do maracujazeiro-doce propagado por sementes, nas duas classes de solo. Para o B, houve aumento quando o maracujazeiro-doce foi cultivado no LVd e ausência de resposta no LVAd. O uso da calagem no LVAd não alterou os teores de micronutrientes na matéria seca do maracujazeiro-doce propagado por sementes até 150 dias. A calagem no LVd aumentou os teores de B e Cu, não alterou o teor de Fe, e reduziu os teores de Zn e Mn na matéria seca do maracujazeiro-doce propagado por sementes.Termos para indexação: saturação por bases, maracujá, Passiflora alata, latossolo. ABSTRACTA experiment was carried out with seedlings, in a greenhouse, aiming to study the effect of the liming on the nutrition of sweet passion fruit plants (Passiflora alata Curtis). The statistical design used was randomized blocks in a factorial scheme (2 x 4) + 2, with four replications. The treatments involved four base saturation levels (40, 60, 80 and 100%), two soil classes (Dystrophic Red-Yellow Latosol -LVAd and Dystrophic Red Latosol -LVd) and two more additional treatments, LVAd without liming and LVd without liming. After 150 days, the dry matter of shoots and the micronutrients contents in the shoots dry matter were evaluated. It was concluded that the increase of base saturation levels reduced the contents of Cu, Mn and Zn in the shoots dry matter for both soil classes. As for the content of B the increase of base saturation levels caused an increase of B in shoots dry matter in the LVd and did not change these contents in the LVAd. The presence of liming on LVAd did not change the contents of micronutrients in the shoots dry matter. The presence of liming on LVd increased the contents of B and Cu, did not change the contents of Fe, and reduced the contents of Zn and Mn in dry matter of sweet passion fruit plants.

Mineral nutrition evolution in the formation of fruit tree rootstocks and seedlings

“…For citrus fruit trees, Bernardi et al (2000) recommend the application of micronutrients through monthly spraying with the following doses (mg L -1 ): B = 0.2, Mn = 0.5 and Zn = 0.6. Boaventura et al (2004) suggest that nutrients are applied through nutrient solution via fertigation according to the following composition (mg L Fonseca et al (2005) propose the following application (mg kg -1 ): B = 0.5, Cu = 1.5, Mn = 3.0, Zn = 5.0 and Mo = 0.1.…”

Assessing the Content of Micronutrients in Soils and Sugarcane in Different Pedogeological Contexts of Northeastern Brazil

“…Micronutrient transfer from soils to crops, associated with low natural fertility and the absence of corrective fertilization can lead to soil depletion and hence plant deficiency (Silva et al, 2009). Other factors such as soil pH (Fonseca et al, 2005;Pestana et al, 2014), phosphate overfertilization (Scalco et al, 2014), soil organic matter (SOM) content (Pigozzo et al, 2008), oxi-reduction reactions (Costa, 2004), and soil texture (Pegoraro et al, 2006) may also contribute to decrease the micronutrient availability in soil, leading to diminished crop yields. In this scenario, the assessment of the micronutrient content in both soils and in plants is important for the adoption of fertilization management that enables increases in production (Chaves and Corrêa, 2003).…”