Consulta: creatorFacets:"Oliveira,O.F."
Registros recuperados: 8
Data/hora: 10/06/2024 05:31:16

Weed community and growth under the canopy of trees adapted to the brazilian semi-arid region
Provedor de dados: 87
Autores: Silva,P.S.L.; Silva,P.I.B.; Silva,K.M.B.; Oliveira,O.F.; Jales,J.D.D.; Medeiros,J.L.B.
The objectives of this work were to evaluate the floristic composition and dry biomass of weeds under the canopy of seven perennial species adapted to the Semi-Arid region of Brazil, and correlate these characteristics with growth traits of the perennial species. The following perennial species were evaluated in two experiments (E1 and E2): mesquite (Prosopis juliflora), jucá (Caesalpinia ferrea), white popinac (Leucaena leucocephala), mofumbo (Combretum leprosum), neem (Azadirachata indica), sabiá (Mimosa caesalpiniaefolia) and tamarind (Tamarindus indica). In E1, the seven species were evaluated in a random block design with four replicates and nine plants per plot. In E2, evaluation comprised four species (mesquite, jucá, white popinac, and tamarind) in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caatinga; Floristic composition.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000100009

Floristic composition and growth of weeds under custard apple (Annona squamosa) progenies
Provedor de dados: 87
Autores: Silva,P.S.L.; Barbosa,Z.; Oliveira,O.F.; Antonio,R.P.; Silva,P.I.B.
Weeds have a negative influence on several fruit tree characteristics, such as yield, making it difficult to management practices in orchards. Alternative weed management methods, aiming to reduce the use of herbicides, have become attractive since herbicides are costly and cause environmental degradation. The use of cultivars with greater competitive ability against weeds has attracted international attention. The objective of this work was to evaluate the floristic composition and growth of weeds under the canopies of irrigated custard apple tree progenies. Twenty halfsibling progenies around three years of age were evaluated in a random block design with five replicates and four plants per plot. A circle with a 0.5 m² area was established around the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annona squamosa; Custard apple fruit; Weeds.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582004000400006

Effect of cowpea intercropping on weed control and corn yieid
Provedor de dados: 87
Autores: Silva,P.S.L.; Oliveira,O.F.; Silva,P.I.B.; Silva,K.M.B.; Braga,J.D.
Herbicides have simplified weed control, but the use of herbicides, besides being costly, resulted in the selection of herbicide-resistant weed biotypes and has become an environmental contamination factor. Herbicide use reduction is one of the goals of modern agriculture, with several alternatives being investigated, including intercropping. The objective of this study was to evaluate the effects of cowpea and corn cultivar intercropping on weed control and corn green-ear (immature ears with 80% humidity grains) and grain yield. A completely randomized block design with split-plots and four replications was used. AG 1051, AG 2060 and PL 6880 corn cultivars (assigned to plots) were submitted to the four treatments: no weeding, two hoe-weeding (22 and 41...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Vigna unguiculata; Cultivars; Green-ear yield; Grain yield.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582009000300009

Controle de plantas daninhas na cultura do milho com gliricídia em consorciação
Provedor de dados: 87
Autores: Araújo Jr.,B.B.; Silva,P.S.L.; Oliveira,O.F.; Espinola Sobrinho,J.
A gliricídia (Gliricidia sepium) é leguminosa perene, cultivada para propósitos múltiplos, que apresenta crescimento rápido e várias substâncias com propriedades alelopáticas. Existem indicações de que a consorciação com gliricídia também pode trazer benefícios no controle das plantas daninhas do milho. O objetivo deste trabalho foi avaliar o controle das plantas daninhas no milho (híbrido duplo AG 1051) com gliricídia em consorciação. Utilizou-se o delineamento em blocos completos casualizados, com oito repetições. Os tratamentos consistiram em: cultivo do milho com capinas (duas, aos 20 e 40 dias após a semeadura), sem capinas e em consorciação com a gliricídia. A gliricídia foi semeada a lanço, com 25 sementes m-2, por ocasião da semeadura do milho,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Milho verde; Rendimento de grãos; Gliricidia sepium.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000400010

Effects of weed "Reestablishment" after hoeing on corn yields
Provedor de dados: 87
Autores: Silva,P.S.L.; Oliveira,A.C.; Oliveira,O.F.; Freitas,F.C.L.; Santos,T.S.
Some growers and researchers sustain the idea that regrowth or root setting of some weeds may occur after hoeing, with detrimental effects over corn. The objective of this study was to evaluate the effects of weed removal from the field, removal after each hoeing, and corn intercropped with gliricidia on weed control and corn yield values. The experimental design consisted of blocks with split-plots and six replicates. Cultivars AG 1051 and BM 2022, planted in the plots, were submitted to the following treatments: no hoeing, two hoeings (at 20 and 40 days after planting), and intercropped with gliricidia. The hoed plots were either submitted to weed removal after the first, second, or both hoeings, or remained without weed removal. In the intercropped...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Gliricidia sepium; Green ear yield; Grain yield.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000200007

Nitrogen doses and weed control via intercropping with gliricidia for corn production
Provedor de dados: 87
Autores: Silva,P.S.L.; Braga,J.D.; Ribeiro,M.S.S.; Oliveira,O.F.; Santos,T.S.
Many studies have demonstrated the beneficial influence of nitrogen doses on corn dry grain yield and green ear yield. Due to a growing concern with environmental degradation, many agricultural practices, adopted in the past, are being reexamined. With regard to weed control, strategies that employ mechanical control, including intercrops, are being the object of renewed interest. The purpose of this study was to evaluate the effects of the application of nitrogen doses (0, 40, 80, and 120 kg N ha-1; as ammonium sulfate) and weed control on the growth, green ear yield, and grain yield of the AG 1051 corn cultivar. A randomized block experimental design with split-plots and nine replications was adopted. In addition to nitrogen rates, the AG 1051 cultivar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Gliricidia sepium; Ammonium sulfate; Green corn; Grain yield.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000300010

Weed control via intercropping with gliricidia: II. corn crop
Provedor de dados: 87
Autores: Silva,P.S.L.; Cunha,T.M.S.; Oliveira,R.C.; Silva,K.M.B.; Oliveira,O.F.
A reduction in herbicide use is one of modern agriculture's main interests and several alternatives are being investigated with this objective, including intercropping. Gliricídia (Gliricidia sepium) mulch has no allelopathic effect on corn or beans but significantly decreased the population of some weed species. The objective of this study was to evaluate green ear and grain yield in corn cultivars as a response to weed control achieved via intercropping with gliricidia. A completely randomized block design with five replicates and split-plots was used. Cultivars AG 1051, AG 2060, BRS 2020, and PL 6880 (assigned to plots) were submitted to the following treatments: no hoeing, hoeing (performed at 20 and 40 days after sowing the corn), and corn...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Gliricidia sepium; Cultivars; Green corn; Grain yield.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582009000100014

Corn yield response to weed and fall armyworm controls
Provedor de dados: 87
Autores: Lima,M.S.; Silva,P.S.L.; Oliveira,O.F.; Silva,K.M.B.; Freitas,F.C.L.
The interference imposed the by weeds on corn decreases practically all vegetative characteristics. As consequence, the green ear and grain yield are also reduced. Losses due to the fall armyworm (Spodoptera frugiperda) attack can reduce corn grain yield up to 34%. In general, weed and insect control issues are addressed separately in research papers. Nevertheless, interaction between weeds and insects may exist. This study aimed to evaluate green ear and corn grain yield response to weed and fall armyworm control. A completely randomized block design with split-plots and five replicates was adopted. Corn cultivar AG 1051 was grown under weedy conditions or with control by hand hoeings performed at 20 and 40 days after planting. Fall armyworm control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Spodoptera frugiperda; Azadirachta indica; Weed-pest interaction.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000100013