Objective to evaluate the initial growth of seedlings of cultivated in different substrata baru. The experiment was conducted in a greenhouse at the State University of Goiás, Ipameri, in plastic bags with a capacity of 8 dm-3. The experimental design was completely randomized design with four treatments and five replications. The treatments were comprised of formulated the basis of substrates: cerrado soil (S1); cerrado soil + cow manure in the ratio 2:1 tanned (S2); cerrado soil with saturation by bases corrected to 60 % (S3); and composts of forest (S4). The seedlings were conducted for 90 days, during which the following variables were evaluated-answers: height, diameter of the collect, number of leaflets, leaf area, dry weight of shoot, root, and total IQD. The data were subjected to analysis of variance and tukey test. Seedlings grown in S4 (composts forest) presented the highest average in height, diameter of the collect, and dry mass of leaves, stem, root and total, followed by the S3 (cerrado soil saturation of bases with 60 %), which also showed growing seedlings in height, diameter, and dry mass. Seedlings grown in S2 did not differ from those grown with the S1. The greatest seedling growth observed in the S4 and S3 can be related to the higher level of fertility of these substrates. The use of substrate formulated with composts forest provides seedlings of baru with higher quality to the field.
No presente estudo, objetivou-se avaliar o crescimento inicial de mudas de mogno-africano (Khaya senegalensis A. Juss.) adubadas com diferentes doses de potássio. O experimento foi realizado em casa de vegetação, em recipiente de plástico com capacidade para 7 dm3 e utilizando como substrato o solo classificado como Latossolo Vermelho-Amarelo distrófico. O delineamento experimental utilizado foi inteiramente casualizado, com cinco tratamentos e cinco repetições, totalizando 25 unidades experimentais. Os tratamentos constituíram-se de cinco doses de K: 0; 40; 80; 120 e 160 mg dm-3, utilizando para aplicação o cloreto de potássio. Aos 150 dias, foram aferidos a altura da planta, o diâmetro do coleto e a massa de matéria seca de folhas, caule, raiz e massa de matéria seca total. Constatou-se que, as doses crescentes de potássio não promoveram aumento no crescimento das plantas. O mogno-africano apresentou baixa exigência em potássio nas fases iniciais de desenvolvimento para a condição edafoclimática no local do experimento.
Native forests have been suffering changes, such as fragmentation and edge effect, and these have implications for the dynamics of carbon within the same fragment, differentiating vegetation and soil. In this way, the work aimed to evaluate the hydro-microbiological attributes of the soil in rainy and dry periods, as well as to indicate if there is an edge effect in a seasonal semideciduous forest fragment. The study was carried out in a forest fragment in the area of the State University of Goiás, Ipameri Campus, consisting of three transects divided into three blocks from the edge. Sampling was performed in two periods of the year, rainy and dry, to determine the gravimetric soil water content (UG), microbial biomass carbon (MBC), basal respiration (BR), and the metabolic quotient (qCO2). The data were subjected to analysis of variance (F test), and when significant, the means were evaluated by the Tukey test at 5% probability. Response variations of microorganisms are closely related to the periods studied; the rainy season benefits the carbon incorporation activity, and the dry season stimulates the carbon release. Consequently, metabolic efficiency is more pronounced in the rainy season. The edge of the fragment only influenced the MBC, evidencing that disturbances caused at the extremity of fragment interfere with the C input in the microbial biomass.
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