Abstract:RESUMOO objetivo deste estudo foi avaliar o crescimento e a qualidade de mudas de Cassia grandis Linnaeus f. (cássia-rosa) em função da adubação fosfatada e da calagem. Os tratamentos foram representados por um fatorial de seis níveis de fósforo (0, 120, 240, 360, 480 e 600 mg dm -3 ) por cinco níveis de saturação por bases do substrato (3,5 (original), 25, 40, 55, 70%), sendo dispostos no delineamento em blocos ao acaso, com quatro repetições. Aos 65 dias após a repicagem, foram medidos a altura da parte aére… Show more
“…A phosphorus efficiency was also observed by other researchers. Freitas et al (2013) reported a positive DQI effect in the dose of 143.16 mg seedling -1 of P in sugar-apple seedlings, and Freitas et al (2017) reported an ascending linear effect for the DQI, in which the greatest phosphorus dose of 600 mg dm -3 Figure 1. Stem diameter (a), proportionally to the use of triple superphosphate (TSP) and irrigation water electrical conductivity (iwEC) levels; plant height (b); shoot dry mass (c); total dry mass (d); absolute growth rate (e); relative growth rate (f); and the Dickson quality index (g), proportionally to the use of TSP in sugar-apple seedlings.…”
“…A phosphorus efficiency was also observed by other researchers. Freitas et al (2013) reported a positive DQI effect in the dose of 143.16 mg seedling -1 of P in sugar-apple seedlings, and Freitas et al (2017) reported an ascending linear effect for the DQI, in which the greatest phosphorus dose of 600 mg dm -3 Figure 1. Stem diameter (a), proportionally to the use of triple superphosphate (TSP) and irrigation water electrical conductivity (iwEC) levels; plant height (b); shoot dry mass (c); total dry mass (d); absolute growth rate (e); relative growth rate (f); and the Dickson quality index (g), proportionally to the use of TSP in sugar-apple seedlings.…”
“…According to Freitas et al (2017) and Delarmelina et al (2013), greater estimates of RDW mean better seedlings performance after planting, since the root system will be able to better anchor the seedling, allow better water and minerals absorption, and easly translocate water and minerals to stem. Thus, seedlings with lesser RDW estimates may reduce plants growth speed and increase costs for plantations maintainance over time (BEHLING et al, 2014;LOPES et al, 2016;FREITAS et al, 2017).…”
Section: Resultsmentioning
confidence: 99%
“…Freitas et al (2017) described the same, considering that various parameters allow nursery manegers to better choose seedlings that will perform better after planting. Tsukamoto-Filho et al (2013) and Lopes et al (2014) also refer to the management practices needed for plantations maintenance and related costs.…”
The seedlings production process of forest plant species is found to be an important stage in the forest-based production chain. The present work was conducted in commercial nurseries aiming to assess morphological parameters of Eucalyptus clonal seedlings in the expedition phase. The experiment was performed in two nurseries located in the southern part (Nursery #1) and slopes' field (Nursery #2) of the State of Minas Gerais, Brazil. The Completely Randomized Design was used, with four treatments or clones (AEC 144 -Eucalyptus urophylla, AEC 244 -Eucalyptus urophylla, AEC 1528 -hybrid of E. urophylla x Eucalyptus grandis and AEC 100 -hybrid of E. urophylla x E. grandis), seven replications and 16 seedlings per plot. Seedlings were produced in 54 cm 3 tubetes according to nurseries protocols. The following parameters were assessed: plant height, collar diameter, dry matter, and seedlings quality index. The Sisvar statistical analysis system was run for Analysis of Variance, and averages were compared by means of Scott-Knott test at 5% significance. The clone AEC 1528 showed better quality standards at the Nursery #1, and clones AEC 100 and AEC 244 showed greater height and collar diameter at the Nursery #2. Therefore, seedlings from commercial nurseries under study showed adequate morphological quality standards for expedition and planting.
“…Corroborating with the other growth variables, the dose of 3 g of NPK under these conditions decreased 38.86% the quality of the seedlings as the doses of manure increased, probably due to this dosage of the mineral fertilizer causing phytotoxicity. Considering the exposed, it is assumed that the best combination for production of cashew tree seedlings was obtained using the dose of 1 g of NPK conciled with 200 g of bovine manure, because, as affirm Freitas et al (2017) the higher the quality index of the more standardized seedlings these are. The reduction will be observed in the quality of seedlings from 300 g manure and NPK 3 g dose is due to the excess salts from both the manure as fertilizer, these respective concentrations, similar results were found by Oliveira et al (2015) when studying guava rootstocks under different sources and proportions of organic materials, which observed higher quality of seedlings in the proportion of 40% of the organic material declining with increasing proportion.…”
The use of grafted seedlings is a cultural practice that aims at the optimization of agricultural production, and materials of organomineral added to the substrate can help in the well development. The aim of this study was to evaluate the effect of the application of increasing doses of organic and mineral material on the development of cashew rootstocks. The test was conducted in the experimental area of the Federal University of Campina Grande (UFCG), campus Pombal-PB in the period from July to September 2017. The treatments were constituted of five increasing doses of organic matter (0, 100, 200, 300 and 400 g of bovine manure) and four levels of mineral fertilizer (0, 1, 2 and 3 g of NPK). The design was in randomized blocks, distributed in factorial 5 × 4, with 4 replications. For the planting, it was used creole seeds originary of the city of Livramento do Cariri Paraibano and substrate composed by sand texture Franco sandy. At 60 days after sowing, the following variables were analyzed: plant height (cm), leaf diameter (mm), number of leaves, leaf area (cm 2 ), fresh and dry mass, leaf, stem, shoot (g), percentage of biomass (%) and quality index of seedlings. Based on the results obtained, it is concluded that the organic and mineral combination (1 g of NPK and 200 g of bovine manure) provided the greatest increases in vegetative growth characteristics and quality of rootstocks in the cashew tree.
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