Controlled-Release Fertilizer on Growth of Melanoxylon brauna Schott Seedlings

Abstract

Melanoxylon brauna is a tree species native to the Atlantic Forest of high ecological and economic value. The objective of this study was to evaluate the growth and nutritional status of seedlings of two Melanoxylon brauna cultivars grown in substrate with different controlled-release fertilizer doses (CRF). The experiment was arranged in a randomized block 4 × 2 factorial design, with four CRF doses (0, 2, 4, and 8 kg m -3 ) and two seed origins (Viçosa-MG and Linhares-ES), with four replicates and 126 seedlings per plot. At 60, 90, and 120 days after emergence, seedlings were collected to measure variables related to emergence, growth, and nutrition. The greatest growth and best nutritional status were found for seedlings originated from seeds collected in Linhares at CRF dose of 8 kg m -3 . On the other hand, seedlings originated from seeds collected in Viçosa showed low emergence and high plant mortality.

Controlled-Release Fertilizer and Container Volume to Produce Inga laurina Seedlings

“…Seedlings produced in 110 and 280 cm 3 containers demonstrated quadratic growth behavior for height, diameter, leaf area and SDM, in function of the CRF doses ( Figure 2). Similar results were observed in other studies with Atlantic Forest seedlings submitted to increasing doses of CRF (Gibson et al, 2019;Gasparin et al, 2015), which also noted that from a given dose there is no increase in growth and/or biomass and there may even be harmful effects. According to Rossa et al (2013) this behavior shows that plants have a maximum biologic growth at an ideal dose, which is identified as maximum technical efficiency dose (MTDE), estimated through the derivative of the equation adjusted for a given growth variable.…”

“…The controlled-release fertilizer (CRF) technology is designed to enable a better rate of nutrient uptake, considering the dynamics of need during the plants growth (Irfan et al, 2018). The use of CRF can reduce production costs, because of a shorter crop cycle, less operations, as well as the optimization of space, water and energy use (Gibson et al, 2019).…”

MINI-CUTTINGS TECHNIQUE FOR VEGETATIVE PROPAGATION OF Dalbergia nigra

“…The emission of a larger number of roots with greater length and contact area by the root system in D. nigra plants is fundamental for increasing the soil volume to be explored, thereby favoring acquisition of water and nutrients, which in turn constitute factors which may be useful for increasing survival rates and the initial growth of this species in the field. According to Gibson et al (2019), seedlings with a vigorous root system can establish themselves more quickly in adverse conditions, recover and increase microbiological activity in the soil, in addition to contributing to the increase of biomass, aggregation and soil structure.…”

CONTROLLED RELEASE FERTILIZER IN THE ROOTING AND PERFORMANCE OF CLONES OF Paratecoma peroba

“…In general, the literature shows that the native arboreal species of the different successional and exotic ecological groups propagated by seeds are responsive to the addition of CRF to the substrate. The example of native species is: Myroxylon peruiferum (Moraes Neto et al, 2003); Anadenanthera peregrina and Schinus terebinthifolius (Rossa et al, 2015); Cedrela fissilis (Navroski et al, 2016); Peltophorum dubium (Dutra et al, 2017) and Melanoxylon brauna (Gibson et al, 2019). In exotic species: Eucalyptus grandis (Rossa et al, 2014); Toona ciliata (Somavila et al, 2014); Moringa oleifera (Rosa et al, 2018); and Acacia mangium (Silva et al, 2019).…”