ResumoA revegetação de áreas desmatadas de Mata Atlântica pode ser realizada com mudas de espécies florestais nativas inoculadas com fungos micorrízicos arbusculares (FMA). Este trabalho objetivou avaliar o efeito de diferentes substratos, na ausência/presença de inoculação com FMA, sobre o crescimento e conteúdo nutricional de mudas de Colubrina glandulosa Perkins. As mudas foram produzidas em tubetes em casa de vegetação. O delineamento experimental foi inteiramente casualizado, com 12 repetições/tratamento e oito tratamentos: T1 (20% esterco bovino + 80% terra), T2 (20% esterco bovino + 80% terra + FMA), T3 (20% esterco bovino + 60% terra + 20% areia), T4 (20% esterco bovino + 60% terra + 20% areia + FMA), T5 (20% esterco bovino + 60% terra + 20% vermiculita), T6 (20% esterco bovino + 60% terra + 20% vermiculita + FMA), T7 (20% esterco bovino + 60% terra + 10% areia + 10% vermiculita) e T8 (20% esterco bovino + 60% terra + 10% areia + 10% vermiculita + FMA). Aos 30, 65, 93 e 115 dias após a instalação do experimento, avaliou-se a altura (H) e diâmetro do coleto (DC). Aos 115 dias, avaliou-se a massa de matéria seca da parte aérea (MSPA) e raiz (MSR), razão MSPA/MSR, taxa de colonização micorrízica da raiz (%COLRAIZ), Índice de Qualidade de Dickson (IQD), conteúdo de nutrientes (N, P, K) na parte aérea e raiz, e eficiência de absorção de nutrientes (N, P, K). Concluiu-se que o T8 é o mais recomendado, pois proporcionou a produção de mudas com elevados valores para a maioria das variáveis de crescimento e nutrição analisadas. Palavras-chave: Fungos micorrízicos arbusculares; Mata Atlântica; recuperação de áreas degradadas. Abstract Effects of substrate and mycorrhizal inoculation on the production of seedlings of Colubrina glandulosa Perkins.Revegetation of deforested Atlantic Forest areas can be carried out with seedlings of native tree species inoculated with arbuscular mycorrhizal fungi (AMF). This study aimed to evaluate the effect of different substrates in the absence/presence of AMF inoculation on growth and nutritional content of Colubrina glandulosa Perkins seedlings. The seedlings were grown in plastic pots under greenhouse conditions. The experimental design was completely randomized with 12 repetitions/treatment and eight treatments: T1 (20% cattle manure + 80% soil horizon), T2 (20% cattle manure + 80% soil horizon + AMF), T3 (20% cattle manure + 80% soil horizon + 20% sand), T4 (20% cattle manure + 80% soil horizon + 20% sand + AMF), T5 (20% cattle manure + 60% soil horizon + 20% vermiculite), T6 (20% cattle manure + 60% soil horizon + 20% vermiculite + AMF), T7 (60% soil horizon A + 20% cattle manure + 10% sand + 10% vermiculite) e T8 (60% soil horizon A + 20% cattle manure + 10% sand + 10% vermiculite + AMF). At 30, 65, 93 and 115 days after the beginning of the experiment, we evaluated the height (H) and collar diameter (DC). At 115 days, we evaluated the dry matter of shoot (MSPA) and root (MSR), MSPA/MSR ratio, rate of roots colonization by mycorrhiza (% COLRAIZ), quality index of Dickson (IQ...
Colubrina glandulosa has potential for reforestation of disturbed areas. Seedlings inoculated with arbuscular mycorrhizal fungi (AMF) can be produced with biosolids from Sewage Treatment Plants. This study aimed to evaluate the response of Colubrina glandulosa seedlings to isolated or mixed inoculation of different AMF species on a biosolid-based substrate under greenhouse conditions. The experimental design was completely randomized, with 32 replicates (seedlings)/treatment and five treatments: (1) control or absence of inoculation (CT); (2) inoculation with Dentiscutata heterogama (DH); (3) inoculation with Gigaspora margarita (GM); (4) inoculation with Rhizophagus clarus (RC); (5) inoculation with the mixture of the three AMF species (MT). We evaluated height and collar diameter of the seedlings at 30, 60, 90, 120, and 140 days after the experiment installation. We evaluated shoot dry biomass (SDM), root dry biomass (RDM), and total dry biomass; SDM / RDM ratio; Dickson Quality Index; relative increments in height, collar diameter, and shoot biomass; nutrient content (N, P, K) in the shoots and roots; efficiency of absorption and utilization of nutrients; rate of root mycorrhizal colonization, at 140 days. In general, the highest values of growth and nutrition variables occurred in the MT treatment, which was recommended, in comparison with CT, DH, GM, and RC. Colonization rates were low (≤ 20 %), regardless of the mycorrhizal inoculum, due to the high levels of phosphorus in the biosolid.
The search for more efficient biotechnological tools for forest regeneration has increased over the past decades. Mycorrhizal inoculation is a valuable strategy to promote seedling growth, but its efficiency depends on the substrate used. This study aimed to investigate the effects of arbuscular mycorrhizal fungal inoculation and different types of substrates on the growth of Pseudobombax grandiflorum and Apuleia leiocarpa seedlings. Experiments were carried out under greenhouse conditions in a completely randomized 6 × 2 factorial design (six substrates and two inoculation levels) with six replications of 12 treatments. Both species showed similar growth patterns. Plants grown in inoculated substrates composed of 70% Cambisol and 30% bovine manure or 80% Cambisol and 20% Biomix showed improved nutritional status. These substrates had good physical and chemical characteristics (pH and P and N levels), which favored plant development and mycorrhizal symbiosis. P. grandiflorum seedlings showed enhanced growth in inoculated substrate composed of 80% Cambisol and 20% Biomix and in inoculated Cambisol fertilized with P. For A. leiocarpa, the best results were observed for seedlings grown in inoculated substratescomposed of 80% Cambisol and 20% Biomix, 70% Cambisol and 30% bovine manure, or Cambisol fertilized with P.
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