Adubação mineral e orgânica no desenvolvimento de orquídea Cattlianthe 'Chocolate drop'

Abstract

RESUMOA falta de estudos que indiquem as necessidades nutricionais de muitas orquídeas resulta na realização de práticas de adubação embasadas em experiências práticas e que não necessariamente atendem às demandas nutricionais de todas as espécies. O objetivo deste trabalho foi avaliar a influência da adubação mineral e orgânica e suas respectivas combinações no desenvolvimento da orquídea Cattlianthe 'Chocolate drop'. As mudas desse híbrido foram obtidas por clonagem in vitro, e cultivadas em condição de casa de vegetação, utilizando potes plásticos com capacidade de 1 L contendo como substrato uma mistura de casca de pinus e carvão (4v:3v). Os tratamentos avaliados foram: sem adubação (testemunha), fertirrigação com fertilizante mineral ultra solúvel (FMU), mistura de torta de mamona e farinha de ossos (TM+FO), bokashi (BOK), FMU + mistura de torta de mamona e farinha de ossos [FMU+(TM+FO)], FMU + bokashi (FMU+BOK), mistura de torta de mamona e farinha de ossos + bokashi [(TM+FO)+BOK], FMU + mistura de torta de mamona e farinha de ossos + bokashi [FMU+(TM+FO)+BOK]. Após oito meses do início das adubações foram avaliados o desenvolvimento da parte aérea e o acúmulo de nutrientes. O tratamento FMU+BOK foi significativamente superior ao tratamento sem adubação, com incrementos aproximados de 54, 42, 33 e 78% da massa seca da parte aérea, comprimento da parte aérea, comprimento médio radicular e área foliar, respectivamente. A combinação entre adubação mineral e orgânica favoreceu o desenvolvimento de plantas do híbrido de Cattlianthe 'Chocolate drop'.Palavras-chave: Orchidaceae, nutrição, fertilização, parte aérea, desenvolvimento vegetativo. ABSTRACT Mineral and organic fertilization influence on the development of Cattlianthe 'Chocolate drop'The lack of studies showing nutritional requirements of many orchids results in adoption of fertilization practices based on practical experience, which may not meet the nutritional requirements of all species. The objective of this study was to evaluate the influence of mineral and organic fertilizers and their combinations on growth of orchid Cattlianthe 'Chocolate drop'. Seedlings of this hybrid were obtained by in vitro cloning, and grown in a greenhouse condition using plastic pots with capacity of 1 L containing as substrate a mixture of pine and bark (4v:3v). The evaluated treatments were: without fertilization (control), ultra-soluble mineral fertilizer ( Eight months after beginning of fertilizations, development of the aboveground part and accumulation of nutrients were evaluated. The FMU+BOK treatment was significantly superior to treatment without fertilization, with approximate increments of 54, 42, 33 and 78% over the dry weight of the aboveground part, aboveground part length, root length and leaf area, respectively. The combination of mineral and organic fertilization favored the growth of hybrid plants of Cattlianthe 'Chocolate drop'.

Seedling size and broiler litter composition affect Peruvian carrot productivity and profitability

“…Wood shavings induced an increase of 2,000 roots in plants, when compared with the number of plants grown in soil covered with broiler litter with rice hulls as bedding material. Segundo Mangiori & Filho (2015), The addition of organic residues to the soil improves the biological and physical attributes, as well as being essential to maintain water and nutrient contents, as they increase retention capacity and availability, reducing their consistency through the soil profile (Hoshino et al, 2016). Thus, broiler litter with wood shavings, with has higher nutritional values and lower C/N ratio, may have provided higher quantities of those elements to plants throughout the growth cycle through decomposition than rice hulls.…”

Doses of organic residues in soil mulch influence productivity and profitability of Peruvian carrot

“…The fresh mass of arracacia leaves was significantly influenced by the fertilization rate of broiler manure applied to cover the soil, and exhibited quadratic growth (Figure 2), with a maximum value of 3.41 Mg ha −1 for the plants grown in soil covered with 11.2 Mg ha −1 of broiler manure, for the two residue types used. When applied as a cover over soil, broiler manure increases water storage in the soil (Chen et al, 2014), helps in the gradual release of nutrients into the soil, and increases biological activity (Hoshino et al, 2016), resulting in an increase in fresh mass production. The decrease in plant productivity after reaching the maximum value was explained by Oliveira et al (2009), who suggested that high levels of organic residues could cause nutrient imbalance in the soil and consequent reduction in the development and final production of the crop.…”

Incentivo à produção agroecológica em assentamentos do Movimento dos Trabalhadores e Trabalhadoras por Direitos (MTD)

“…A farinha de ossos apresenta-se como uma fonte de nitrogênio, fósforo e cálcio (Hoshino et al, 2016). Os ossos de bovinos têm grande concentração de fósforo, alcançando quase o dobro de concentração quando comparados ao superfosfato simples e, além disso, o processo de queima desses ossos torna a farinha de ossos calcinada, com concentração elevada de óxido de cálcio (Damaceno et al, 2018).…”