Substrate in the initial development of pajeu seedlings

Triplaris gardneriana populary know as ‘Pajeu’ is a tree species with potential for recovery of riparian forests. The aim of this work was to evaluate the emergence and initial development of saplings in different substrates. The experiment was conducted in the didactic garden of the Campus Liberdade, from the University of International Integration of Afro-Brazilian Lusophony, in the municipality of Redenção, Ceará State. A completely randomized design with six treatments and four replicates of 25 seeds was used. The substrates used were: soil, soil + humus, soil + compost, soil + manure, soil + humus + cattle manure and soil + humus + compost. Seedling emergence, emergence speed index, plant height and root length were evaluated. The substrate soil + humus + compost provided better seedling quality possibly due to the best physical characteristics, such as aerations and water retention

Growth of seedlings in banana plant cv. Prata Catarina micropropagated in organic substrates

In commercial bananas there is an increasing increase for seedlings of high genetic quality and free of pathogens; thus, the use of micropropagation has been increasingly encouraged for the production of seedlings. However, the success of establishing these seedlings in the environment depends on several factors, in which, the substrate has a relevant role. The objective of this study was to evaluate the growth of micropropagated banana seedlings under the influence of different formulations of substrates based on soil, bovine manure and vegetable ash for organic production system. The experiment was carried out on a certified rural property under an organic production system in the municipality of Palmácia (CE). The experimental design used was completely randomized, with four replications. The substrates were used in a ratio of 2:1, always two parts of soil for one of substrate, which was used: soil (ravine soil), organic compost (bovine manure + vegetal remains), bovine manure and vegetable ash (from sugar cane mill). The test was conducted in full sun and without the aid of irrigation, as the experiment coincided with the rainy season in the region. At 68 days after planting (DAP), growth analyzes were carried out: plant height, diameter of the pseudostem, number of leaves, length of roots, fresh and dry mass of aerial part and roots. The best substrates for the growth of micropropagated banana seedlings cv. Prata Catarina were mixtures of soil + organic compost and soil + manure

Phosphate fertilization and organic compost on the initial growth of sorghum in degraded soils

One of the strategies for the recovery of degraded soils is the planting of fast-growing forage species with high biomass production. In this sense, the objective of this research was to evaluate the initial growth of sorghum in degraded soils with organic fertilization and different phosphorus levels. A completely randomized design with a 4 x 3 x 2 factorial arrangement was used, with four soil types, three levels of phosphorus fertilization and two levels of organic fertilization. At 64 days after sowing the characteristics of the initial growth were analyzed: plant height, stem diameter, leaf number and fresh shoot mass. The height was measured by measuring the neck of the plant until the end of the newest fully expanded leaf, measured with the aid of a measuring tape and expressed in centimeters. The diameter of the stem, by means of a digital pachymeter. The application of phosphorus and organic matter in degraded soils is necessary for the initial development of sorghum plants, due to the low availability of this element, caused by the high adsorption of P in the soil colloids. Besides that, the lack of organic matter in the studied soils led to a decrease in the growth of sorghum, therefore, it is concluded that soil management in saline environments is necessary for the application of phosphorus and organic matter for a sustainable and technically viable production