scholarly journals PRODUCTION OF Eucalyptus urophylla x Eucalyptus grandis SEEDLINGS WITH DIFFERENT FERTILIZERS

FLORESTA ◽  
2020 ◽  
Vol 50 (2) ◽  
pp. 1231
Author(s):  
Rodrigo Camara ◽  
Cristiane Figueira da Silva ◽  
Marcos Gervasio Pereira ◽  
Gabriela Cavalcanti Alves ◽  
Dereck Halley Anthony Alves Ferreira ◽  
...  
Keyword(s):  
Aerial Part ◽  
Block Design ◽  
Eucalyptus Grandis ◽  
Dry Mass ◽  
Absorption Efficiency ◽  
Eucalyptus Urophylla ◽  
Mineral Fertilization ◽  
Randomized Block Design ◽  
Growth And Nutrition ◽  
Applied Dose

Mineral fertilization is an important practice that contributes to the production of seedlings with satisfactory quality. This study aimed to evaluate the effect of the application of potassium chloride (KCl) and monoammonium phosphate (MAP) on growth and nutrition of Eucalyptus urophylla x Eucalyptus grandis seedlings. The experiment was conducted in full sun, with direct sowing in tubes containing composite substrate (Pinus bark, coconut fiber, bovine manure and vermiculite). The experimental design was a randomized block design in a 5 x 2 factorial scheme, with five doses of KCl (0.0, 0.025, 0.050, 0.100, and 0.200 g seedling-1) and two doses of MAP (0 and 0.10g seedling-1), with four replicates. At 120 days, the effect of the interaction between the KCl and MAP doses was verified for the variables: diameter at root collar, dry mass of the aerial part (DMAP) and total (TDM), Dickson Quality Index, N content, P K in the aerial part, K content in the roots, absorption efficiency (AE) of N and P. For the variables: height (H); leaf area; root dry mass (RDM); H/DRC and DMPA/RDM ratios; and N and P content in the roots, only effect of the application of MAP is observed, whereas for AE_K the effect was only of KCl. Thus, there is variation in the effect of KCl doses as a function of morphological and nutritional variables evaluated. In general, the best seedling growth and nutrition occurs with the applied dose of 0.100 g KCl + 0.10 g MAP seedling -1.

scholarly journals Wood ash and water availability in the production of Paiaguás-grass

2019 ◽  
Vol 14 (6) ◽  
pp. 1 ◽  
Author(s):  
Edna Maria Bonfim-Silva ◽  
Maria Débora Loiola Bezerra ◽  
Tonny José Araújo da Silva ◽  
William Fenner ◽  
Ana Paula Alves Barreto Damasceno
Keyword(s):  
Soil Water ◽  
Water Availability ◽  
Aerial Part ◽  
Block Design ◽  
Dry Mass ◽  
Wood Ash ◽  
Soil Water Availability ◽  
Partial Replacement ◽  
Mineral Fertilization ◽  
Randomized Block Design

This study evaluated the production of Paiaguás grass (Urochloa brizantha) as a function of wood-ash doses and water availability in the Cerrado Oxisol. The experiment was carried out in a greenhouse with a randomized block design in a fractioned 5x5 factorial scheme, corresponding to five wood-ash doses (0; 8; 16; 24 and 32 g dm-3) and five soil water-availability scenarios (4; 8; 16; 32; 64 kPa) with four repetitions. The experimental design was based on the modified central compound and consisted of 13 treatments of wood-ash doses (g dm-3) and soil water-availability scenarios (kPa): 0-4; 0-16; 0-64; 8-8; 8-32; 16-4; 16-16; 16-64; 24-8; 24-32; 32-4; 32-16; 32-64. Soil volumetric moisture was monitored daily by means of the Diviner 2000 Capacitance Probe® for soil water replenishment according to the treatments. In 30-day intervals, three cuts were performed in the aerial part of the plants evaluating dry mass of leaves, stems, aerial part, number of leaves and of tillers. Data were subjected to analysis of variance and when significant to regression analysis, both up to 5% of error probability, through the statistical program SISVAR and response surface study using SAS. The combinations of wood ash doses with water soil tensions influence the productive characteristics of Paiaguás grass. Fertilization with wood ash reduces the effect of water stress on Paiaguás grass and this residue may be a viable alternative to partial replacement of mineral fertilization and safe disposal in the environment.

scholarly journals Productivity and quality of Mombasa grass under fertilization with pig deep-litter and NPK

2020 ◽  
Vol 24 (7) ◽  
pp. 437-443
Author(s):  
Marina da C. Guerrero ◽  
Tiago R. de Sousa ◽  
Saulo A. de Oliveira ◽  
Rômulo R. Caldeira ◽  
Adilson Pelá
Keyword(s):  
Block Design ◽  
Organic Fertilizer ◽  
Dry Mass ◽  
Point Of View ◽  
Neutral Detergent Fiber ◽  
Mineral Fertilizers ◽  
Panicum Maximum ◽  
Mineral Fertilization ◽  
Economic Point ◽  
Randomized Block Design

ABSTRACT The use of pig deep-litter (PDL) in pasture fertilization can be an important alternative from an environmental and economic point of view. This study was conducted to evaluate the fertilization with PDL exclusively or in association with mineral fertilizers on the quality and productivity of Panicum maximum cv. Mombasa. The experiment was carried out in Ipameri, GO, Brazil. The design was a randomized block design in a 2 x 5 factorial scheme with four repetitions, in plots of 24 m². The doses of PDL (0; 5; 10; 15 and 20 Mg ha-1) were tested, with or without fertilization with NPK (50 kg ha-1 of P2O5, 10 kg ha-1 of K2O and 10 kg ha-1 of N). The organic fertilizer was applied broadcast at the planting of the pasture, and the mineral fertilizers were split and applied at planting and as topdressing. Dry mass, crude protein, acid detergent fiber and neutral detergent fiber were evaluated. PDL doses associated with mineral fertilization led to linear increases from 52 to 282% in the analyzed variables and better bromatological composition. PDL application is beneficial to the production of pastures, and increasing applications up to the PDL dose of 20 Mg ha-1 associated with mineral fertilization promoted better quantitative and qualitative results. With exclusive fertilization with PDL, the gains in quality and productivity were more modest.

scholarly journals GENETIC VARIABILITY IN PROGENIES OF Eucalyptus grandis AND Eucalyptus urophylla FOR TOLERANCE TO HYDRIC DEFICIT

FLORESTA ◽  
2018 ◽  
Vol 48 (4) ◽  
pp. 543 ◽  
Author(s):  
Mateus Chagas ◽  
Leandro Siqueira ◽  
Shinitiro Oda ◽  
Raimundo Medeiros ◽  
Evandro Vagner Tambarussi
Keyword(s):  
Genetic Variability ◽  
Block Design ◽  
Eucalyptus Grandis ◽  
Eucalyptus Urophylla ◽  
Forest Expansion ◽  
Breeding Programs ◽  
Genetic Gains ◽  
Randomized Block Design ◽  
Genotypic And Phenotypic Correlations ◽  
Coefficient Of Genetic Variation

Genetic variability in progenies of Eucalyptus grandis and Eucalyptus urophylla for tolerance to hydric deficit. Information on the adaptation and genetic potential of Eucalyptus under water deficit conditions is necessary owing to the increasing cultivation of the genus in regions considered as "forest frontiers". Therefore, the present study aimed to estimate genetic variability, genotypic and phenotypic correlations, and estimated genetic gains in progenies of E. grandis and E. urophylla. Two progeny tests (TP1 and TP2) were performed in the municipality of Vila Nova dos Martirios (state of Maranhão, Brazil), in 30-month-old plants. The experiment was carried out using a randomized block design, with five replicates, nine plants/square plot, and 144 treatments in TP1 and 264 in TP2. Statistical analysis was performed and genetic parameters were estimated. Individual and within-progeny heritabilities were corrected using the kinship coefficient for eachspecies. Genetic gains were low, ranging from 0.96 to 6.39% for E. grandis and 1.62 to 5.48% for E. urophylla. The diameter at breast height (DBH) showed a higher coefficient of genetic variation compared with the other measured characteristics, suggesting a higher potential for selection. High, positive, and significant correlations were observed between DBH and height (H), indicating the possibility of obtaining gains based on a single characteristic. Heritability was considered low, thus directly influencing the selection gains, which were lower than those commonly reported in other studies. These findings provide important information for breeding programs in areas of forest expansion.

scholarly journals Weed Interference on the Accumulation of Dry Mass and Macronutrients of Eggplant ‘Nápoli’

2019 ◽  
Vol 37 ◽  
Author(s):  
L.J.P. MARQUES ◽  
M.S. BIANCO ◽  
S. BIANCO ◽  
A.B.C. FILHO ◽  
W.R. CERVEIRA JR ◽  
...  
Keyword(s):  
Mass Distribution ◽  
Mineral Nutrition ◽  
Block Design ◽  
Dry Mass ◽  
Reproductive Organs ◽  
Agricultural Crops ◽  
Weed Interference ◽  
Maximum Reduction ◽  
Randomized Block Design ◽  
Growth And Nutrition

ABSTRACT: The presence of weeds may affect both growth and nutrition of agricultural crops due to interference. The objective was to evaluate the interference of weeds in the dry mass distribution and in the accumulation of dry mass and macronutrients in eggplant. The treatments consisted of increasing weed-free and weedy periods (0-14, 0-28, 0-42, 0-56, 0-70, 0-84, 0-98, 0-112, 0-126, 0-140 and 0-154 days after transplanting) in eggplant ‘Nápoli’. The experiment was arranged in a randomized block design with three replicates. Weeds affected the distribution of dry mass between vegetative and reproductive organs of eggplant. There was a significant reduction in the accumulation of dry mass and macronutrients when weeds grew with eggplant crop beyond 42 days after transplanting, reaching the maximum reduction of 79%, 75%, 80%, 82%, 83%, 83% and 80% in the accumulation of dry mass, K, N, Ca, Mg, P and S, respectively. Therefore, the weed community significantly affects the growth and mineral nutrition of eggplant ‘Napoli’, and there should be no weed-crop coexistence beyond 28 days after seedling transplanting.

Plants Mineral Nutrition on the Preference of Glycaspis brimblecombei (Hemiptera: Aphalaridae) in Eucalyptus sp.

2019 ◽  
pp. 1-9
Author(s):  
Lilian Guimarães de Favare ◽  
Otávio Peres Filho ◽  
Marcelo Dias de Souza ◽  
Diego Arcanjo do Nascimento ◽  
Sheila Espindola de Matos ◽  
...  
Keyword(s):  
Mineral Nutrition ◽  
Pearson Correlation ◽  
Block Design ◽  
Eucalyptus Grandis ◽  
Eucalyptus Camaldulensis ◽  
Mineral Fertilization ◽  
Probability Of Error ◽  
Natural Defense ◽  
Glycaspis Brimblecombei ◽  
Randomized Block Design

The plants nutritional maintenance is a support to their natural defense in relation to the insects attack of economic importance. The mineral nutrition arises as an alternative, since it provides the plants silvicultural conditions necessary to express all their productive potential, with the power of resistance to biotic constraints. Thus this study had as objective to evaluate the effect of different formulations of mineral fertilization in the eucalyptus plantations in relation to occurrence of Glycaspis brimblecombei (Moore), in the field. The experiment was carried out in the field from December 2015 to December 2016. The experimental arrangement was planned provided in the factorial design, with three origins of Eucalyptus sp. (Eucalyptus camaldulensis Dehn; hybrids (Eucalyptus urophylla S.T. Blake) x Eucalyptus grandis (Hill ex Maiden) and E. urophylla x E. camaldulensis); and seven nutritional formulations. The research data were subjected to analysis of variance (ANOVA), under a randomized block design in a factorial scheme (3 x 7), and the means compared by the Tukey test at 5% probability of error. The response variable used in the analysis was the occurrence of eggs and lerps, being transformed, in order to become suitable for parametric tests. The population fluctuation was carried out in the planting annual cycle. For the correlation analysis between the dependent and the independent variables, the data were analyzed by Pearson correlation (r) and their values were analyzed by using the Student's T-Test. The omissions influenced on the preference of the red gum lerp psyllid to Eucalyptus sp. In E. camaldulensis the omission of nitrogen and potassium influence on the preference and the absence of silicon causes the favoring of the pest oviposition. In the hybrid E. urophylla x E. grandis the absence of fertilization and the absence of nitrogen, phosphorus, potassium, individually, are less preferred.

scholarly journals Mineral fertilization with macronutrients in castor bean, lineage UFRB 222

2020 ◽  
Vol 24 (2) ◽  
pp. 106-114
Author(s):  
Antonio R. Cavalcante ◽  
Washington B. de Lima ◽  
Lucia H. G. Chaves ◽  
Josely D. Fernandes ◽  
Felipe G. de Souza ◽  
...  
Keyword(s):  
Leaf Area ◽  
Castor Bean ◽  
Ricinus Communis ◽  
Block Design ◽  
Growth And Yield ◽  
Mineral Fertilization ◽  
Randomized Block Design ◽  
Applied Dose ◽  
Total Seed ◽  
Reference Doses

ABSTRACT The study was conducted to evaluate the effect of mineral fertilization on the growth and production of seeds and oil of castor bean (Ricinus communis L.) lineage UFRB 222. The experiment was carried out in a greenhouse of the Centro de Tecnologia e Recursos Naturais at the Universidade Federal de Campina Grande, PB, Brazil. A randomized block design with three repetitions and 14 treatments originated from a Baconian matrix was adopted. Reference doses were 50:300:150 kg ha-1 of N, P2O5 and K2O. At the end of the study, plant height, stem diameter, number of leaves, leaf area, total seed number, total seed weight, total fruit number and oil production per plant were evaluated. On average, the nitrogen dose of 150 kg ha-1 led to adequate values of growth and yield variables. For plant growth, 300 kg ha-1 of phosphorus should be applied, since the differences in the increase of growth variables between this dose and the highest ones estimated by the equations were very small; for castor bean production, the best applied dose was 600 kg ha-1 of phosphorus. The application of potassium increased the leaf area, number of seeds and production of oil, and the best dose was 300 kg ha-1. Phosphorus was the nutrient that promoted the highest production of oil per plant (92.40 g), followed by nitrogen (75.55 g) and potassium (72.10 g).

scholarly journals Doses of bokashi in the growth of two basil cultivars

2021 ◽  
Vol 6 ◽  
pp. 1-9
Author(s):  
Roberto Takane ◽  
Cyro Fragoso Silva ◽  
Jessica Soares Pereira ◽  
Christian Morimasa Takemura ◽  
Talita Angélica ◽  
...  
Keyword(s):  
Plant Height ◽  
Vegetative Growth ◽  
Aerial Part ◽  
Block Design ◽  
Dry Mass ◽  
Ocimum Basilicum ◽  
Stem Diameter ◽  
Control Treatment ◽  
Organic Fertilization ◽  
Randomized Block Design

The present work aimed to evaluate the influence of use, as well as to determine adequate doses in organic fertilization of the bokashi type in the cultivation of two basil (Ocimum basilicum L.) cultivars. Seeds from the collection of the Floriculture Laboratory of the Phytotechnics Department of the Federal University of Ceará were used. The treatments used were arranged in a randomized block design (RBD), arranged in a 2x5 factorial scheme, consisting of two cultivars of basil (Genovese and Anão) and five doses of Bokashi, namely: 0, 3, 6, 9 and 18 g.L-1. Plants that received no dose (0 g.L-1) served as a control treatment. Each treatment contained 5 repetitions, with the plot consisting of 7 pots, one plant per pot, the useful unit a pot with a basil seedling. From the transplant, applications of bokashi were started in doses of 0, 3, 6, 9, and 18 g.L-1 in both cultivars. Both applications were performed every 20 days after the first application of Bokashi. Fivety five days after transplantation in the final pot, the following variables were analyzed: plant height, stem diameter, fresh and dry mass of the aerial part and the root. The 9 g.L-1 dose of Bokashi showed the best results for the variables analyzed for both cultivars, in addition to being efficient when compared to the control, in which the vegetative growth was incipient.

scholarly journals Yield and water use efficiency of cactus pear under arrangements, spacings and fertilizations

2019 ◽  
Vol 23 (6) ◽  
pp. 413-418 ◽  
Author(s):  
Alex A. Lédo ◽  
Sérgio L. R. Donato ◽  
Ignacio Aspiazú ◽  
João A. da Silva ◽  
Paulo E. R. Donato ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Block Design ◽  
Dry Mass ◽  
Mineral Fertilization ◽  
Cactus Pear ◽  
Green Mass ◽  
Randomized Block Design ◽  
Production Cycles ◽  
Use Efficiency

ABSTRACT Cactus pear is adapted to semi-arid conditions. In this study, the objective was to evaluate the water use efficiency and green and dry mass yields of the cultivar Gigante under different fertilization rates and sources in three production cycles, spacing and planting arrangement. Seventy two treatments, involving two types of arrangements in the plots, three spacings in the subplots and 12 types of fertilization in the sub-subplots were arranged in a split-split-plot scheme, using randomized block design with three repetions. Dry mass content decreases while water use efficiency and green mass and dry mass yields increase from the first to the third cycle. It is feasible to use planting arrangements in triple or quadrupling rows which allow increasing the mechanization index of the crop. Organomineral fertilization with 30 or 60 Mg ha-1 year-1 of bovine manure combined with 150-300-600 kg ha-1 year-1 of N-P2O5-K2O and 300-300 kg ha-1 year-1 of P2O5-K2O, respectively; organic fertilization with 90 Mg ha-1 year-1 of manure; and mineral fertilization with 300-300-600 kg ha-1 year-1 of N-P2O5-K2O ensure green mass and dry mass yields greater than 200 and 15 Mg ha-1 cycle-1, respectively, and water use efficiency greater than 20 kg ha-1 mm-1 in ‘Gigante’ cactus pear. It is concluded that yields of this magnitude are ensured with application of about 300-300-300 kg ha-1 year-1 of N-P2O5-K2O using organic, organomineral or mineral sources.

scholarly journals EFEITOS DE LÂMINAS DE IRRIGAÇÃO NA PRODUÇÃO DE MUDAS DE Eucalyptus grandis W. (HILL ex. MAIDEN) EM SUBSTRATO DE FIBRA DE COCO

Irriga ◽  
2005 ◽  
Vol 10 (2) ◽  
pp. 123-134 ◽  
Author(s):  
Jane Luísa Wadas Lopes ◽  
Irae Amaral Guerrini ◽  
João Carlos Cury Saad
Keyword(s):  
Water Management ◽  
Aerial Part ◽  
Dry Matter ◽  
Block Design ◽  
Eucalyptus Grandis ◽  
Morphological Characteristics ◽  
Design Experiment ◽  
Coconut Fiber ◽  
Branch Number ◽  
Randomized Block Design

 EFEITOS DE LÂMINAS DE IRRIGAÇÃO NA PRODUÇÃO DE MUDAS DE Eucalyptus grandis W. (HILL ex. MAIDEN) EM SUBSTRATO DE FIBRA DE COCO  Jane Luísa Wadas Lopes1; Iraê Amaral Guerrini2; João Carlos Cury Saad11Departamento de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Botucatu-SP.2Departamento de Recursos Naturais, Faculdade de Ciências Agronômicas,  Universidade Estadual Paulista, Botucatu-SP  1 RESUMO            Este trabalho teve por objetivo avaliar lâminas de irrigação na produção de mudas de Eucalyptus grandis espaçadas a 49 cm2, produzidas com substrato de fibra de coco pasteurizada. O experimento foi conduzido na empresa Camará – Mudas Florestais em Ibaté, SP, nas estações inverno – primavera do ano de 2003, constituindo-se de um delineamento de blocos ao acaso com quatro repetições, sendo cinco lâminas de irrigação diárias (6, 8, 10, 12 e 14 mm), aplicadas através de uma barra de irrigação em diferentes horários (10, 13 e 16 h). Aos 108 dias após a aplicação das lâminas foram realizadas avaliações da sobrevivência final das mudas em todas as parcelas, altura de parte aérea, diâmetro de colo, relação altura da parte aérea / diâmetro de colo, número de pares de folhas, número de ramos, matéria seca da parte aérea e da radicular, matéria seca total e área foliar. Os resultados indicaram que houve influência das lâminas de irrigação na sobrevivência das mudas, sendo que sob as lâminas de 6 e 8 mm dia-1  a produção ficou drasticamente comprometida. Com relação às características morfológicas, verificou-se, pela análise de regressão realizada, a influência das lâminas em todas as variáveis. Desta maneira, concluiu-se que as lâminas de irrigação de 12 e de 14 mm dia-1 foram as que mais contribuíram para o desenvolvimento das mudas, com qualidade ótima aos 108 dias após semeadura. As características químicas do substrato possibilitaram ótimo desenvolvimento das plantas. UNITERMOS: Manejo hídrico, substrato, viveiro, eucalipto.  LOPES, J.L.W., GUERRINI, I.A., SAAD, J.C.C. EFFECTS OF IRRIGATION DEPTHS ON Eucalyptus grandis W. (HILL ex. MAIDEN) SEEDLINGS IN COCONUT FIBER SUBSTRATE  2 ABSTRACT The aim of this study was to assess the effects of irrigation depths on Eucalyptus grandis seedling produced on coconut fiber substrate. The experiments took place in Camará Commercial Farm (Camará Mudas Florestais – Forest Seedling), in Ibaté, SP, from June to September 2003, in a randomized block design experiment with 4 replications and daily irrigations (6, 8, 10, 12 and 14 mm), applied at different times (at 10 am, 1 pm and 4 pm). 108 days after sowing, the following parameters were assessed: aerial part height, bond diameter, aerial part height/bond diameter relation, number of leaf pairs, branch number, aerial part and root dry matter, total dry matter and leaf area. The results pointed out that the irrigation depths as well as the substrate affected the bedder final quality. The survival degree was strongly influenced by the watering laminar flux; i.e., depths of 6 and 8 mm, that drastically compromised the production. Regarding the morphological characteristics, regression analysis demonstrated that the irrigation depths influenced all parameters. Thus, it can be concluded that irrigation depths of 12 and 14 mm day-1 helped the bedder development achieving excellent quality at 108 days after sowing. KEYWORDS: water management, substrate, greenhouse, eucalyptus.

scholarly journals Correlations and Path Analysis in Segregating Cowpea Generations Regarding Biological Nitrogen Fixation

2022 ◽  
Vol 14 (2) ◽  
pp. 79
Author(s):  
Ismael Gaião da Costa ◽  
José Wilson da SiIva ◽  
Gheysa Coelho Silva ◽  
Mario de Andrade Lira Junior ◽  
Cybelle Souza de Oliveira ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Path Analysis ◽  
Biological Nitrogen Fixation ◽  
Aerial Part ◽  
Block Design ◽  
Great Influence ◽  
Dry Mass ◽  
Phenotypic Correlations ◽  
Randomized Block Design ◽  
Biological Nitrogen

The objective of this research was to evaluate the correlations between variables related to the biological nitrogen fixation (BNF) in segregating generations of cowpea and to unfold these correlations in direct and indirect effects, through path analysis. An outdoor bench experiment was conducted at Carpina Experimental Sugarcane Station of, located at the Zona da Mata region of the State of the Pernambuco, Northeast of Brazil (Federal Rural University of Pernambuco), between March and April 2016. The seeds were planted in 20 cm × 30 cm polyethylene bags, using a substrate composed of a mixture of vermiculite and sand washed in a ratio of 1:1. Bradyrhizobium references, recommended for culture, were used as a mixture of two strains. Parental and F2, F3 and F4 generations were evaluated in a randomized block design with four replicates. Data collection was performed 45 days after the emergency (DAE). Phenotypic correlations and path analysis of the number of nodules per plant (NN), nodules dry mass (NDM), dry roots mass (DRM), dry mass of aerial part (DMAP), nodulation efficiency (NODE) and nitrogen accumulated in the aerial part (NAAP). The phenotypic correlations between the variables related to the BNF showed high magnitudes, demonstrating that there is a great influence of each of the variables on the others, furthermore the path analysis of the coefficients indicated that all the primary components (NN, NDM, DRM, DMAP and NODE) must be considered when it is desired to increase the NAAP in segregating generations of cowpea.

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