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| Registros recuperados: 70 | |
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| CONCENÇO,G.; ANDRES,A.; SCHREIBER,F.; SILVA,A.F.; MOISINHO,I.S.; CORADINI,M.C.. |
| ABSTRACT: The aim of this study was to evaluate the occurrence of weeds in flooded rice areas, as a function of planting system and herbicide programmes in the previous cropping year. The experiment was installed in field conditions, in randomized complete blocks design, arranged in factorial scheme 3 x 2, with eight replications. In factor A, treatments consisted on conventional tillage, minimum tillage and no till cropping systems, coupled to the application (traditional control) or not (semi-ecological system) of herbicides (Factor B). One year after rice cultivation, preceding the planting of the next cropping season, phytosociological evaluations of the weed communities present in the treatments were carried out. We assessed the overall infestation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical control; Semi-ecological rice; Phytosociology; Southern Brazil. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100286 |
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| Concenço,G.; Motta,I.S.; Correia,I.V.T.; Santos,S.A.; Mariani,A.; Marques,R.F.; Palharini,W.G.; Alves,M.E.S.. |
| We aimed with this study to compare weed infestation in coffee under two different cropping managements: conventional coffee grown alone, or intercropped with banana plantation in a year-round basis (late spring, late summer, late fall and late winter). The experiment was installed in 2009 under field conditions at the Escola Municipal Rural Benedita Figueiró de Oliveira, in the city of Ivinhema in the state of Mato Grosso do Sul, Brazil. Assessments of weed occurrence were made three years after employment, on both cropping systems, and density, frequency, dominance and the importance value for each plant species in each system and season were quantified. Plant diversity within each system was estimated by Simpson and Shannon-Weiner indexes. Similarity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed occurrence; Intercrops; Phytosociology. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400001 |
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| Tuffi Santos,L.D.; Cardoso Filho,O.; Santos Júnior,A.; Sant'Anna-Santos,B.F.; Felix,R.C.; Leite,F.P.. |
| The objective of this work was to analyze the floristic variation and phytosociological structure of weeds as influenced by relief and time of year in eucalyptus plantations in Santana do Paraíso and Guanhães - MG. The total area sampled for each locality was approximately 10 ± 3 hectares, comprising three types of relief: lowland, slope, and upper area. In each type of relief, 10 plots of 1 m² were sampled, corresponding to 30 plots per locality, where they were randomly allocated in a zigzag. The taxonomic identification was performed in four assessments, corresponding to the months of November and March, comprising two ratings each season, always at the same points, and geo-referenced using the Global Positioning System (GPS). A total of 3,893... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Dynamics; Phytosociology; Ecological adaptation. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300001 |
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| MELO,T.S.; MAKINO,P.A.; CECCON,G.. |
| ABSTRACT: Composition and level of weed infestation interfere with crop yield and increase production costs. This study aimed to identify weed composition and infestation in corn grown with different plant populations, single, and intercropped with palisade grass. The phytosociological method was used to evaluate density, frequency, dominance, and infestation level of weeds in single and intercropped corn, a with conventional (0.90 m) and reduced (0.45 m) spacing, and low and high plant population in Dourados, MS, Brazil. Commelina benghalensis, Echinochloaspp., and Euphorbia heterophylla were the species most found in the treatments. Single corn with higher plant population decreased weed occurrence. Treatments with palisade grass under a reduced spacing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Urochloa; Plant population; Phytosociology; Diversity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100199 |
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| SANTOS,F.L.S.; TEIXEIRA,I.R.; TIMOSSI,P.C.; SILVÉRIO,J.G.D.; BENETT,C.G.S.. |
| ABSTRACT The aim of this paper was to conduct the phytosociological survey of weeds in cultivated areas with common beans and castor beans in the municipality of Ipameri, in the Southeast region of the State of Goiás, considering intercropping and monoculture. The survey was conducted 20 days after emergence of the crop using the square inventory method. We evaluated the green and dry biomass of weeds, their leaf area, frequencies, density and absolute and relative dominance, relative importance and similarity index, expressed as a percentage. Sixteen weed species were identified, distributed into 10 botanical families. The most important weed species in the Southeast region of Goiás for the cultivation of common beans and castor beans were: Cenchrus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Ricinus communis; Intercropping; Phytosociology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100236 |
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| Santos,M.A.F.; Matsmoto,S.N.; Cesár,F.R.C.F.; Bonfim,J.A.; Araujo,G.S.; Viana,A.E.S.. |
| This study aimed to study the composition and dynamics of seed bank from soil of coffee plantations associated with grevilea trees in the experimental fields of the Southwest Bahia State University, on Vitória da Conquista campus. The experiments were carried out from September 2006 to May 2007. The coffee trees (Coffea arabica) were sown at three x one m spacing, associated with grevillea trees (Grevillea robusta) and maintained at densities of 277, 139, 123, 69, 62 and 31 plants ha-1, under direct sunlight. One hundred grams of soil were taken from each treatment with four repetitions and later identified and counted with a 10x magnifying glass. To determine seedling emergence, four soil samples of 1000 g were collected from each experimental field and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica; Grevillea robusta; Phytosociology. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000400003 |
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| Concenço,G.; Silva,C.J.; Correia,I.V.T.; Silva,J.A.N.; Santos,S.A.; Fróes,A.L.; Fábris,D.N.; Staut,L.A.. |
| This study aimed to evaluate the level of infestation by weed species in a consolidated Jatropha plantation, as a function of the plant species grown in interrows. The experiment was installed in 2006 at the district of Itahum, city of Dourados, state of Mato Grosso do Sul, Brazil, made possible through a partnership between Embrapa Western Agriculture and Paraiso Farm. Treatments consisted of (1) Jatropha in monocrop, with no plant at the interrrows; or the following plants cultivaded at the interrows of Jatropha: (2) Stylosanthes spp.; (3) Brachiaria ruziziensis; (4) Brachiaria ruziziensis + Stylosanthess pp.; (5) Brachiaria humidicola; (6) Panicum maximum cv. massai; (7) Cajanus cajan cv. anão; (8) Crotalaria spectabilis; (9) Crop rotation system 1 -... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha crop; Infestation; Phytosociology. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000200010 |
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| Pimentel,Marina C.P.; Barros,Marx J.; Cirne,Paulo; Mattos,Eduardo A. de; Oliveira,Rodrigo C.; Pereira,Miriam C.A.; Scarano,Fabio R.; Zaluar,Henrique L.T.; Araujo,Dorothy S.D.. |
| We examined large-scale spatial variation of structural parameters and floristic composition in open Clusia scrub, a vegetation type of the Brazilian "restingas" (sandy coastal plain vegetation). This vegetation is organized in islands separated by sandy stretches with sparse herbaceous vegetation. We located 12 sample areas on three consecutive beach ridges, lying parallel to the coastline and at different distances from the ocean, in close proximity to two lagoons (Cabiúnas and Comprida). Each sample area was divided into three strips. We used the line intercept method to sample all woody plants ³ 50 cm tall. We used nested ANOVA to verify structural variation between different sampling scales. TWINSPAN analysis was performed to examine the variation in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phytosociology; Plant community; Sampling scale; Sandy coastal plain. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000300018 |
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| Reis,Ana Maria S.; Araújo,Elcida L.; Ferraz,Elba Maria N.; Moura,Ariadne N.. |
| The influence of climatic variations on the herbaceous component of the "caatinga" vegetation was examined in the state of Pernambuco, Brazil. A total of 105 1 × 1 m-plots were established, of which 35 were in a level micro-habitat, 35 in a riparian micro-habitat, and 35 in a stony microhabitat. During two consecutive years all herbaceous plants in these plots were counted, measured (height and diameter), and collected for identification. The Shannon-Wiener diversity index and the equitability were calculated for each year, as well as the density, frequency, dominance, total basal area and importance index for each species. The total annual pluviometric was 819.5 and 448.8 mm in 2002 and 2003, respectively. The herbaceous flora in the study area was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caatinga; Herbaceous component; Phytosociology; Seasonal climate changes; Species richness. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042006000300017 |
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| SZTUTMAN,MARCIO; RODRIGUES,RICARDO R.. |
| Este trabalho teve como objetivo caracterizar a florística, estrutura e fisionomia de três florestas em distintas situações fisiográficas da planície litorânea. Foram amostradas uma floresta sobre turfeira pouco profunda (floresta turfosa rasa), uma floresta sobre turfeira profunda (floresta turfosa profunda) e uma floresta em solo firme e seco (floresta sobre morrote), todas situadas na área de floresta contínua do Parque Estadual da Campina do Encantado, Pariquera-Açu SP. Foi realizado o levantamento fitossociológico através de blocos de parcelas contíguas de 10 × 10 m -- totalizando 1,04 ha -- e amostradas todas as árvores com DAP > ou = 4,8 cm. Foram encontradas ao todo 144 espécies, sendo 112 na floresta sobre morrote, 46 na floresta turfosa rasa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Rain Forest; Tropical peat forest; Vegetational mosaic; Phytosociology; Coastal plains. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000200005 |
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| CIELO FILHO,ROQUE; SANTIN,DIONETE A.. |
| O Bosque dos Alemães situa-se no Bairro Guanabara, em Campinas, SP (22º53' S e 47º04' W, altitude 685 m) e é formado por 2 ha de floresta estacional semidecidual. Foi realizado o censo das espécies arbóreas com PAP > ou = 15 cm, em que foram plaqueados 1.937 indivíduos, 1.851 vivos e 86 mortos em pé. Foram identificadas 105 espécies, distribuídas em 43 famílias e 67 gêneros; 80 espécies são nativas e 25 introduzidas. O índice de diversidade de Shannon foi estimado em 3,45 nat.ind.¹. As famílias com maior riqueza foram Leguminosae, Myrtaceae, Moraceae, Rutaceae, Euphorbiaceae e Bignoniaceae. As espécies com maior IVC foram Cryptocarya aschersoniana Mez, Piptadenia gonoacantha (Mart.) Macbr. e Eucalyptus tereticornis Smith. A soma do IVC das espécies... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urban forest; Floristic; Phytosociology; Management; Conservation. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000300005 |
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| Araújo,Glein Monteiro; Guimarães,Antônio José Maia; Nakajima,Jimi Naoki. |
| RESUMO - (Fitossociologia de um remanescente de mata mesófila semidecídua urbana, Bosque John Kennedy, Araguari, MG, Brasil). Um estudo fitossociológico foi realizado no Bosque Municipal John Kennedy, município de Araguari, MG (48°11'19''W e 18°38'35''S). O bosque, com aproximadamente 11,2 ha, situa-se no perímetro urbano e é formado principalmente por uma mata mesófila semidecídua. No levantamento fitossociológico realizado, amostraram-se, em 1,2 ha, 1827 indivíduos, pertencentes a 46 famílias; 88 gêneros e 113 espécies, com um índice de diversidade de Shannon de H' = 3,75 nats/indivíduo. Os parâmetros fitossociológicos indicam as espécies mais importantes: Licania apetala, Micrandra elata, Copaifera langsdorffii, Astronium nelson-rosae e Alchornea... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urban semideciduous mesophytic forest; Phytosociology; Gaps. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041997000100007 |
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| TONIATO,MARIA TERESA ZUGLIANI; LEITÃO FILHO,HERMÓGENES DE FREITAS; RODRIGUES,RICARDO RIBEIRO. |
| Foi realizado um levantamento fitossociológico em dois fragmentos de floresta higrófila (mata de brejo) no município de Campinas, SP. Em cada fragmento foram alocadas 10 parcelas contíguas de 10 m x 10 m e amostrados todos os indivíduos com PAP (perímetro à altura do peito) <FONT FACE="Symbol">³</FONT> 10 cm. Os dados dos dois fragmentos foram agrupados e analisados em conjunto. Ao todo foram amostrados 955 indivíduos de 55 espécies, 44 gêneros e 29 famílias. Foi observada baixa diversidade em espécies (H = 2,80 nats/indivíduo). As espécies de maior IVI, em ordem decrescente, foram Calophyllum brasiliensis (Clusiaceae), Protium almecega (Burseraceae), Styrax pohlii (Styracaceae), Syagrus romanzoffiana (Arecaceae), Talauma ovata (Magnoliaceae),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Swamp forest; Forest fragments; Floristics; Phytosociology; Campinas/SP/BR. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041998000200012 |
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| Nascimento,Clóvis E.S.; Rodal,Maria J.N.; Cavalcanti,Antônio C.. |
| Floristic and phytosociological surveys were carried out for 12 months in the Embrapa-SPSB, Petrolina, Pernambuco, Brazil. A transect was laid on starting at the river bank extending for 790 m away from the river and divided into 140 10 × 10 m contiguous plots. In each plot, all standing plants, alive or dead, with stem diameter at soil level > 3 cm and total height > 1 m were sampled. Along this transect, an elevation range of 9.40 m was registered and five topographical environments were identified: riverside (MR), dike (D), floodable depression (DI), boundary terrace (TL) - all of them belonging to the fluvial terrace with Fluvic Neosol and Haplic Cambisol both silty textured eutrophic soils - and the inlander tableland (TS), with medium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phytosociology; São Francisco river; Semi arid; Soil; Woody vegetation. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000300001 |
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| DURIGAN,GISELDA; FRANCO,GERALDO ANTÔNIO DAHER CORRÊA; SAITO,MASAHIRO; BAITELLO,JOÃO BATISTA. |
| O estudo fitossociológico, se realizado em diferentes estratos verticais da floresta, fornece dados de grande valia para a compreensão da dinâmica da comunidade. Efetuou-se levantamento das espécies arbóreas presentes em diferentes estratos, em área de 6.000 m² de floresta madura, na Estação Ecológica dos Caetetus, Gália, SP. Foram utilizadas 60 parcelas de 10 x 10 m, para indivíduos com diâmetro do caule a 1,30 m acima do nível do solo (DAP) a partir de 5 cm (estrato superior); 10 x 2 m, para indivíduos com DAP entre 1 e 5 cm (estrato intermediário) e 60 sub-parcelas de 2 x 2 m, para indivíduos menores que 1 cm de DAP (estrato inferior). Verificou-se que a diversidade, a composição florística e a densidade relativa das espécies variam entre estratos. No... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seasonal semideciduous forest; Phytosociology; Stratification. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000400003 |
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| Ivanauskas,Natália Macedo; Rodrigues,Ricardo Ribeiro; Nave,André Gustavo. |
| (Aspectos ecológicos de um trecho de floresta de brejo em Itatinga, SP: florística, fitossociologia e seletividade de espécies). No presente trabalho estudou-se um trecho de floresta de brejo localizada na fazenda Santa Irene, de propriedade da EUCATEX Ltda., no município de Itatinga-SP (48º38'52,2"W e 23º17'41,6"S), com uma área de 2 ha. O levantamento fitossociológico foi realizado através do método de censo de 1 ha do remanescente florestal, onde foram amostrados todos os indivíduos com PAP (perímetro à altura do peito) > a 15 cm. Foram amostrados 1310 indivíduos, pertencentes a 28 famílias, 34 gêneros e 39 espécies do estrato arbustivo-arbóreo. As famílias que apresentaram os maiores valores de IVC foram Clusiaceae (53,49), Burseraceae (41,30),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phytosociology; Swamp forest; Ciliar forest; Itatinga. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041997000200005 |
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| Registros recuperados: 70 | |
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