scholarly journals Influência de ácido indolbutírico no enraizamento de estacas semilenhosas de Campomanesia aurea

2016 ◽  
Vol 22 (1) ◽  
pp. 94
Author(s):  
Aquélis Armiliato Emer ◽  
Gilmar Schafer ◽  
Eduarda Demari Avrella ◽  
Morgana Delazeri ◽  
Pedro Augusto Veit ◽  
...  
Keyword(s):  
Positive Response ◽  
Callus Formation ◽  
Rio Grande ◽  
Dry Mass ◽  
Rio Grande Do Sul ◽  
Average Volume ◽  
Indolebutyric Acid ◽  
Root Volume ◽  
Naturally Occurring ◽  
Leaf Retention

Campomanesia aurea (O. Berg) is a species native to southern Brazil, naturally occurring from the state of São Paulo to Rio Grande do Sul, and presenting a great ornamental potential. The objective was to verify the rooting of semihardwood cuttings of Campomanesia aurea using indolebutyric acid (IBA) doses. The cuttings were collected in the municipality of Barão do Triunfo, Rio Grande do Sul State, in December 2014. The cutting base was immersed in concentrations of zero (control), 2,000, 4,000, 6,000 and 8,000 mg L-1 of IBA, subsequently established in a carbonized rice husk substrate and placed in a protected environment with an intermittent misting system. At 111 days after installation, dead and rooted cuttings, leaf retention, callus formation, root volume, root and shoot dry matter were evaluated. The experimental design was completely randomized with four replications with 20 cuttings. Data were submitted to analysis of variance and regression. No statistical differences were found for any of the evaluations. An average rooting was observed in 28% of cuttings and callus formation was observed in 48% of cuttings. Root average volume per cutting was 0.15 mL, root dry mass was 0.01 g, and shoot dry mass was 0.28 g. There was a negative correlation between leaf retention and mortality of cuttings. It is concluded that the production of C. aurea by cutting is viable, and that there was no positive response to the application of IBA with the conditions under which the experiment was developed.

scholarly journals PRODUÇÃO FORRAGEIRA E EFICIÊNCIA DE UTILIZAÇÃO DA ÁGUA DO CAPIM SUDÃO SUBMETIDO A DIFERENTES LÂMINAS DE IRRIGAÇÃO1

Irriga ◽  
2020 ◽  
Vol 25 (1) ◽  
pp. 143-159
Author(s):  
Wellington Mezzomo ◽  
Marcia Xavier Peiter ◽  
Adroaldo Dias Robaina ◽  
Jardel Henrique Kirchner ◽  
Rogerio Ricalde Torres ◽  
...  
Keyword(s):  
Reference Evapotranspiration ◽  
Rio Grande ◽  
Dry Mass ◽  
Maximum Efficiency ◽  
Rio Grande Do Sul ◽  
Sudan Grass ◽  
Significant Difference ◽  
Sorghum Sudanense ◽  
Santa Maria ◽  
Water Depths

PRODUÇÃO FORRAGEIRA E EFICIÊNCIA DE UTILIZAÇÃO DA ÁGUA DO CAPIM SUDÃO SUBMETIDO A DIFERENTES LÂMINAS DE IRRIGAÇÃO1   WELLINGTON MEZZOMO2; MARCIA XAVIER PEITER3; ADROALDO DIAS ROBAINA4; JARDEL HENRIQUE KIRCHNER5; ROGÉRIO RICALDE TORRES6 e BRUNA DALCIN PIMENTA7   1 Trabalho retirado da tese intitulada: “Viabilidade técnica e econômica da produção de forragem do capim sudão irrigado por aspersão convencional”, do autor Wellington Mezzomo2 2 Eng. Agrônomo, Mestre, Doutorando no Programa de Pós-Graduação em Engenharia Agrícola, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected]. 3 Eng. Agrônoma, Doutora, Professora Associada do Departamento de Engenharia Rural, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected]. 4 Eng. Agrônomo, Doutor, Professor Titular do Departamento de Engenharia Rural, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected]. 5 Eng. Agrônomo, Doutor, Professor do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Rua Nelsi Ribas Fritsch, nº 1111, bairro Esperança, Ibirubá, RS, Brasil, CEP: 98200-000, [email protected] 6 Eng. Agrônomo, Doutor, Professor do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Rua Eng. João Viterbo de Oliveira, nº 3061, Zona Rural, Vacaria, RS, Brasil, CEP: 95219-899, [email protected]. 7 Eng. Agrônoma, Mestre, Professora do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Rua Nelsi Ribas Fritsch, nº 1111, bairro Esperança, Ibirubá, RS, Brasil, CEP: 98200-000, [email protected].     1 RESUMO   As pastagens cultivadas são a forma mais prática e viável economicamente para alimentação bovina, entretanto, na região sul do Brasil no período de primavera-verão a qualidade e a disponibilidade forrageira decaem em razão da irregularidade pluvial, fazendo-se necessária a utilização da irrigação. O capim Sudão (Sorghum sudanense (Piper) Stapf), cultivar BRS Estribo vem se destacando em relação as demais gramíneas de verão, porém o suprimento hídrico ótimo ainda é desconhecido, pois as pesquisas divergem sobre os resultados. O objetivo, foi avaliar a produtividade do capim Sudão sob diferentes lâminas e determinar a eficiência na utilização da água em dois anos de cultivo (2015/2016 e 2016/2017). Os experimentos foram conduzidos na Universidade Federal de Santa Maria, baixo o delineamento experimental em blocos ao acaso com cinco lâminas de água, 25, 50, 75, 100 e 125% da evapotranspiração de referência (ETo) e tratamento testemunha sem irrigação, todos com quatro repetições. Houve diferença estatisticamente significativa para os distintos tratamentos, sendo determinado a máxima eficiência técnica para produção de massa seca e eficiência de utilização da água, no Ano 1 as lâminas de água foram 103,1% e 73,6% da ETo respectivamente e no Ano 2 foram as lâminas com 120,8% e 95,6% da ETo.   Keywords: evapotranspiração de referência, massa seca, BRS Estribo.           MEZZOMO, W.; PEITER, M. X.; ROBAINA, A. D.; KIRCHNER, J. H.; TORRES, R. R.; PIMENTA, B. D. FORAGE PRODUCTION AND EFFICIENCY IN THE UTILIZATION OF WATER IN SUDAN GRASS SUBMITTED TO DIFFERENT IRRIGATION DEPTHS     2 ABSTRACT   Cultivated pastures are the most practical and economically viable way to feed cattle, however, in southern Brazil, during spring-summer, forage quality and availability decline due to rainfall irregularity, irrigation is required. Sudan grass (Sorghum sudanense (Piper) Stapf), cultivar BRS Estribo  has been outstanding in relation to the other summer grasses, however the optimal water supply is still unknown, as research diverges about the results. The objective was to evaluate the yield of Sudan grass under different depths and to determine the efficiency in the utilization of water, in two years of cultivation (2015/2016 and 2016/2017). The experiments were conducted at the Federal University of Santa Maria, under a randomized block design with five water depths, 25, 50, 75, 100 and 125% of reference evapotranspiration and control treatment without irrigation, all with four repetitions. There was a statistically significant difference for the different treatments, being determined the maximum efficiency technique for dry mass production and efficiency in the utilization of water, in Year 1 the water depths were 103.1% and 73.6% of ETo respectively, and in Year 2 depths were 120.8% and 95.6% of ETo.   Keywords: reference evapotranspiration, dry mass, BRS Estribo.

scholarly journals Forage characters of different Paspalum species in Rio Grande do Sul: a meta-analysis

2017 ◽  
Vol 47 (7) ◽  
Author(s):  
Larissa Arnhold Graminho ◽  
Miguel Dall’Agnol ◽  
Luciana Pötter ◽  
Rodrigo Ramos Lopes ◽  
Carine Simioni ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Mass Production ◽  
Meta Analysis ◽  
Rio Grande ◽  
Dry Mass ◽  
Rio Grande Do Sul ◽  
Pasture Production ◽  
Forage Plants ◽  
Natural Pasture ◽  
Leaf Dry Mass

ABSTRACT: The objective of this study was to evaluate, through meta-analysis, the forage characteristics of various species of the genus Paspalum and to use them to select the best ecotypes that can be used in artificial hybridization as parents and hybrids for pasture production and natural pasture recovery systems. Data were obtained from studies conducted by the Department of Forage Plants and Agrometeorology of the Universidade Federal do Rio Grande do Sul. Database comprised tests conducted with ecotypes and/or hybrids of Paspalum spp. in plots for evaluating total dry mass production, leaf dry mass production, and stem dry mass production by means of cuts. Total dry mass production, which included leaves and stems, differed between the ecotypes and hybrids. Hybrid H12 was the most divergent of all evaluated accessions. The greatest genetic divergence occurred due to dry mass production. Hybrids showed high total dry mass production, comprised mainly of leaves. Hybrid H12 and the accession of Paspalum lepton 28E were identified as the most dissimilar based on the generalized Mahalanobis distance using Tocher’s method. Total dry mass production is the characteristic that most contributed to the detection of genetic variability.

scholarly journals Co-inoculation of Bradyrhizobium japonicum and Azospirillum brasilense in the Soybean Crop

2020 ◽  
Vol 12 (10) ◽  
pp. 154
Author(s):  
Cleudson J. Michelon ◽  
Anderson D. Schott ◽  
Vitor A. B. Rubin ◽  
Emanuele Junges ◽  
Thamara E. Pinto ◽  
...  
Keyword(s):  
Grain Yield ◽  
Root System ◽  
Central Region ◽  
Bradyrhizobium Japonicum ◽  
Azospirillum Brasilense ◽  
Mass Number ◽  
Rio Grande ◽  
Dry Mass ◽  
Rio Grande Do Sul ◽  
Soybean Crop

The objective of this paper was to evaluate the effect of the co-inoculation of Bradyrhizobium japonicum (B. japonicum) and Azospirillum brasilense (A. brasilense) on the agronomic characteristics of the soybean crop in the central region of State of Rio Grande do Sul (RS). The experiment was conducted during three harvests (2016/2017, 2017/2018, 2018/2019), in the central region of the State of RS. The treatments were: T1-inoculation with 1 dose B. japonicum; T2-co-inoculation with 1 dose of B. japonicum + 1 dose of A. brasilense; T3-co-inoculation with 2 doses of B. japonicum + 1 dose of A. brasilense; T4-co-inoculation with 2 doses of B. japonicum + 2 doses of A. brasilense; T5-co-inoculation with 1 dose of B. japonicum + 2 doses of A. brasilense; T6-without inoculation (control). The determinations were: shoot and root system dry mass, number and dry mass of nodules, and grain yield. It was observed that the use of co-inoculation with 1 dose of B. japonicum + 2 doses of A. brasilense provided a higher dry mass of nodules and grain yield of the soybean crop.

Sinningia × vacariensis (Gesneriaceae) from Southern Brazil, the first natural hybrid described for the genus 

Phytotaxa ◽  
2013 ◽  
Vol 119 (1) ◽  
pp. 45 ◽  
Author(s):  
Gabriel Emiliano Ferreira ◽  
Jorge Waechter ◽  
Alain Chautems
Keyword(s):  
Rio Grande ◽  
Natural Hybrid ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Araucaria Forest ◽  
Naturally Occurring ◽  
Rocky Outcrops

In this paper we describe and illustrate Sinningia × vacariensis a naturally occurring hybrid between S. lineata and S. macrostachya, from rocky outcrops inside an Araucaria forest in Rio Grande do Sul, Brazil.

scholarly journals Pindo Palm fruit yield and its relationship with edaphic factors in natural populations in Rio Grande do Sul

2017 ◽  
Vol 47 (2) ◽  
Author(s):  
Gilson Schlindwein ◽  
Adilson Tonietto ◽  
André Dabdab Abichequer ◽  
Augusto Cruz de Azambuja ◽  
Bruno Brito Lisboa ◽  
...  
Keyword(s):  
Natural Populations ◽  
Rio Grande ◽  
Fruit Yield ◽  
Rio Grande Do Sul ◽  
Palm Fruit ◽  
Agricultural Ecosystems ◽  
Edaphic Conditions ◽  
Naturally Occurring ◽  
Chemical Conditions ◽  
Brachiaria Pastures

ABSTRACT: The objective of this study was to evaluate the fruit yield of naturally occurring populations of Pindo palms ( Butia odorata ) in different habitats and agricultural ecosystems. Three areas were selected in the municipalities of Barra do Ribeiro, Tapes and Arambaré, all of which are located on the Litoral Médio in the state of Rio Grande do Sul, Brazil. Eleven 25x100m² plots were selected in the aforementioned areas, and fruit yield was evaluated in the 2008 and 2009 seasons. Chemical conditions of the soil in each plot, elevation of terrain, height, and density of the reproductive Pindo palms were also assessed. Data analysis revealed a strong correlation between the edaphic conditions and the yield from the Pindo palms. Tapes Pindo palms exhibited higher fruit yield as a result of an increase in the number of bunches produced per plant, along with highly fertile soils and greater availability of calcium and magnesium. The lowest fruit yields were linked to nutrient-poor soils in Brachiaria pastures, as well as sandy plains containing high levels of sodium. Changes in the characteristics of the soils associated with habitat and management influenced the fruit yield of Pindo palms.

scholarly journals Chemical control of California arrowhead (Sagittaria montevidensis) resistant to acetolactate synthase and photosystem II inhibiting herbicides in irrigated rice

2016 ◽  
Vol 46 (12) ◽  
pp. 2084-2089 ◽  
Author(s):  
Diogo da Silva Moura ◽  
José Alberto Noldin ◽  
Leandro Galon ◽  
Diogo Balbé Helgueira ◽  
Karen Piraine Martins ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Open Field ◽  
Chemical Control ◽  
Rice Variety ◽  
Rio Grande ◽  
Acetolactate Synthase ◽  
Dry Mass ◽  
Rio Grande Do Sul ◽  
Irrigated Rice ◽  
High Degree

ABSTRACT: California arrowhead is one of the primary weeds infesting paddy rice fields in the Brazilian states of Santa Catarina and Rio Grande do Sul, where the system of pre-germinated seeding is used. The objective of this study was to evaluate the selectivity and effectiveness of saflufenacil application in irrigated rice, either singly or in combination with other herbicides in the same application or sequentially, for the control of Sagittaria montevidensis biotype that is resistant to ALSand PSII-inhibiting herbicides. In the first experiment carried out in a greenhouse, saflufenacil was applied, either singly or in combination with penoxsulam, bispyribac-sodium, pyrazosulfuron-ethyl, bentazon, or propanil to the S. montevidensis (SAGMO 32) biotype and the irrigated rice variety Epagri 108. In the second experiment, single or combined (including sequential) applications of saflufenacil, bentazon, and cyhalofop-butyl were applied to Epagri 108 in open field conditions. Saflufenacil combined with propanil showed a high degree of phytotoxicity and a reduction in the accumulation of dry mass in Epagri 108. Application of saflufenacil, bentazon, and cyhalofop-butyl in combination or sequentially resulted in an increase in phytotoxicity in Epagri 108 compared to when applied singly. A pplication of saflufenacil singly or in combination with penoxsulam, bispyribac-sodium, bentazon, or pyrazosulfuron-ethyl did not adequately control SAGMO 32.

scholarly journals Hybrids of Paspalum plicatulum × P. guenoarum: Selection for forage yield and cold tolerance in a subtropical environment

2021 ◽  
Vol 9 (1) ◽  
pp. 138-143
Author(s):  
Karla M. Saraiva ◽  
Miguel Dall'Agnol ◽  
Eder A.M. Da Motta ◽  
Emerson A. Pereira ◽  
Cleber H.L. De Souza ◽  
...  
Keyword(s):  
Cold Tolerance ◽  
Rio Grande ◽  
Dry Mass ◽  
Forage Yield ◽  
Hybridization Technique ◽  
Rio Grande Do Sul ◽  
Selection For ◽  
Selection Of ◽  
Subtropical Environment ◽  
Feeding Systems

Selection of improved genotypes is important for pasture-based feeding systems in subtropical regions. Our goal was to identify hybrids of Paspalum with enhanced forage yield and cold tolerance across 2 sites [Bagé and Eldorado do Sul (ES)], in Rio Grande do Sul, Brazil. We evaluated 19 P. plicatulum × P. guenoarum hybrids, P. plicatulum genotype 4PT, P. guenoarum cultivars Azulão and Baio and, as Control, Megathyrsus maximus cv. Aruana. At both sites, the experimental design was a completely randomized block with 4 replications. Total dry mass (total-DM), leaf-DM and cold tolerance (ColdT) were recorded. At Bagé, hybrid 102069 produced higher total-DM and leaf-DM than the progenitors and cv. Aruana, while at ES, hybrids 102069 and 10308 produced higher total-DM than 4PT, Azulão and Aruana; hybrid 102069 had higher leaf-DM. At Bagé, 16 hybrids displayed ColdT similar to their progenitors and higher than Aruana, while at ES, 12 hybrids showed ColdT similar to Azulão and Baio and higher than 4PT and Aruana. This study demonstrated that hybrids of Paspalum with superior forage yield to their progenitors and Aruana, and hybrids with higher ColdT than 4PT and Aruana are in existence. The hybridization technique shows potential for producing alternative genotypes with higher forage yield and ColdT for sowing in subtropical regions.

scholarly journals Growth and production of nasturtium flowers in three hydroponic solutions

2011 ◽  
Vol 29 (4) ◽  
pp. 584-589 ◽  
Author(s):  
Evanisa Fátima RQ Melo ◽  
Osmar S dos Santos
Keyword(s):  
Growth Rate ◽  
Aerial Part ◽  
Rio Grande ◽  
Dry Mass ◽  
Rio Grande Do Sul ◽  
Biological Productivity ◽  
Randomized Experimental Design ◽  
Tropaeolum Majus ◽  
Degree Equation ◽  
Santa Maria

This experiment was carried out during April to August 2003 in a greenhouse at the Universidade Federal de Santa Maria, Rio Grande do Sul state, Brazil. The growth and production of nasturtium flowers (Tropaeolum majus) in hydroponics NFT system was typified. Treatments were displayed in a 3x11 factorial, with six replications, in entirely randomized experimental design, and were composed of three nutrition solutions and 11 assessment dates. Each plant was separated between aerial part and root for the evaluation of dry mass. The blossoming started 49 days after the transplant (DAT). The plants presented good development in hydroponics, as well as growing dry mass, stature, leaf area and IAF, during the cycle. The culture's growth rate presented larger accumulation of leaf mass from 49 DAT on, in linear relation. Biological productivity was adjusted to a 2nd degree equation. Nutrition solutions did not show statistical differences, however, Furlani (1997) solution was the most reasonably priced.

Sign in / Sign up

Export Citation Format

Share Document