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Effects of weed control through cowpea intercropping on mayze morphology and yield Planta Daninha
Gomes,J.K.O.; Silva,P.S.L.; Silva,K.M.B.; Rodrigues Filho,F.F.; Santos,V.G..
Intercropping combined with competitive maize cultivars can reduce the use of herbicides to control weeds. The objective of this work was to evaluate the effects of intercropping cowpea and maize, as well as hand-weeding on maize morphology and yield. The experimental design was in randomized complete blocks, with treatments arranged in split-plots and five replications. The plots consisted of four maize cultivars (BA 8512, BA 9012, EX 4001, EX 6004) and the split-plots consisted of the following treatments: no-weeding; twice hand-weeding (20 and 40 days after sowing); and intercropping with cowpea ('Sempre Verde' cultivar), both maize and cowpea sown at the same time. The variables evaluated were: maize fresh green ears and grain yield; characteristics of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays L.; Green ears; Grain yield; Competition; Vigna unguiculata (L) Walp.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582007000300001
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Weed control via intercropping with gliricidia: I. cotton crop Planta Daninha
Silva,P.S.L.; Silva,J.C.V.; Carvalho,L.P.; Silva,K.M.B.; Freitas,F.C.L..
The majority of cotton grown commercially in the world has white lint, but recently, there has been a growing interest in colored lint cotton in several countries, including Brazil. The use of naturally-colored fiber reduces chemical pollution. The objective of this paper was to evaluate cotton cultivar fiber yield in response to weed control via intercropping with gliricídia. Cultivars BRS-Verde (greenish fibers), BRS-Rubi (reddish brown fibers), BRS-Safira (brown fibers), and BRS-187 8H (white fibers) were submitted to the following treatments: no hoeing, two hoeings (at 20 and 40 days after transplanting), and cotton intercropped with gliricídia. In the intercropped treatment, gliricídia was planted between rows of cotton plants, using one seedling...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Naturally-colored cotton fiber; Gliricidia sepium; Cultivars.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582009000100013
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Controle de plantas daninhas na cultura do milho com gliricídia em consorciação Planta Daninha
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
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Weed community and growth under the canopy of trees adapted to the brazilian semi-arid region Planta Daninha
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
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Effects of weed "Reestablishment" after hoeing on corn yields Planta Daninha
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
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Weed control in corn and weed sample size for growth evaluations Planta Daninha
Tavella,L.B.; Silva,P.S.L.; Oliveira,V.R.; Fernandes,P.L.O.; Sousa,R.P..
The objectives of this study were to evaluate baby corn yield, green corn yield, and grain yield in corn cultivar BM 3061, with weed control achieved via a combination of hoeing and intercropping with gliricidia, and determine how sample size influences weed growth evaluation accuracy. A randomized block design with ten replicates was used. The cultivar was submitted to the following treatments: A = hoeings at 20 and 40 days after corn sowing (DACS), B = hoeing at 20 DACS + gliricidia sowing after hoeing, C = gliricidia sowing together with corn sowing + hoeing at 40 DACS, D = gliricidia sowing together with corn sowing, and E = no hoeing. Gliricidia was sown at a density of 30 viable seeds m-2. After harvesting the mature ears, the area of each plot was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Gliricidia sepium; Integrated control; Hoeing; Intercropping; Corn yield.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100006
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Weed control and green ear yield in maize Planta Daninha
Silva,P.S.L.; Silva,E.S.; Mesquita,S.S.X..
The objective of this work was to evaluate the influence of weeding frequency on cultivar Centralmex green corn yield. Two experiments were conducted in Mossoró-RN (Brazil), with the use of sprinkler irrigation. A random block design with four replicates was used. It was observed that the total number and weight (TW) of unhusked green ears, the number and weight of marketable unhusked ears and the number and weight of marketable husked ears were reduced under no weeding treatment. The number timing of weedings did not influence green corn yield, except for one weeding at 60 DAP, which was equivalent to the "no weeding" treatment, for TW. When maize is marketed considering the total number of green ears, higher net income is obtained when one weeding is...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Green corn.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582004000100017
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Effect of cowpea intercropping on weed control and corn yieid Planta Daninha
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
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Green ear yield and grain yield of maize cultivars in competition with weeds Planta Daninha
Silva,P.S.L.; Silva,K.M.B.; Silva,P.I.B.; Oliveira,V.R.; Ferreira,J.L.B..
The reduction in herbicide use is one of the greatest interests for modern agriculture and several alternatives are being investigated with this objective, including the adoption of cultivars that suppress weeds. The objective of this study was to verify if maize cultivars develop differently, in competition with weeds, to produce green ears and grain. Randomized complete block design was used, with split-plots and five replications. Cultivars DKB 390, DKB 466, DKB 350, AG 7000, AG 7575 and Master, were evaluated in the plots, without weeding and two weedings (at 22 and 41 days after sowing) in sub plots. Twenty-one species were identified in the experimental area, the most frequent being Gramineae (Poaceae), Euphorbiaceae, Leguminosae (Fabaceae) and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Green corn; Leaf; Root; Tolerance to weeds.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000100010
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Weed control via intercropping with gliricidia: II. corn crop Planta Daninha
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
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Crescimento do milho com controle de plantas daninhas via consorciação com gliricídia Planta Daninha
Araújo Jr.,B.B.; Silva,P.S.L.; Morais,P.L.D.; Dombroski,J.L.D.; Oliveira,V.R..
A consorciação com a gliricídia controla as plantas daninhas do milho. Com o objetivo de entender melhor esse controle, realizou-se uma análise do crescimento do milho em consorciação com a gliricídia. O híbrido duplo AG 1051 foi cultivado com capinas (duas capinas, aos 20 e 40 dias após a semeadura), sem capinas e em consorciação com a gliricídia. Na consorciação, a gliricídia foi semeada a lanço, com 25 sementes viáveis m-2, por ocasião da semeadura do milho, entre as fileiras desta cultura. Utilizou-se o delineamento de blocos completos casualizados com parcelas subdivididas e oito repetições. O controle de plantas daninhas foi aplicado às parcelas, e as 13 coletas da parte aérea das plantas, para avaliação da área foliar e da matéria seca, às...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Gliricidia sepium; Milho-verde; Rendimento de grãos.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000400009
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Corn yield response to weed and fall armyworm controls Planta Daninha
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
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Influence of corn sowing density and gliricidia intercropping on weed control Planta Daninha
Silva,P.S.L.; Souza,A.D.; Paula,V.F.S.; Oliveira,F.H.T.; Silva,K.M.B..
There is interest in the identification of the best seeding density for new corn hybrids and on reduced use of herbicides for weed control. The objective of this study was to evaluate the effects of seeding density (30, 50, 70, and 90 thousand plants ha-1) and weed control on green ear yield and grain yield in corn cultivar AG 1051. A completely randomized block design was adopted with split-plots (seeding densities assigned to plots) and ten replicates. Weed control was achieved by means of two hoeings and by planting corn intercropped with gliricidia (between corn rows, in pits spaced 0.3 m apart). A "no weeding"treatment was included as well. Increased seeding density increased the total number and weight of marketable green ears and decreased the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Gliricidiasepium; Green corn; Grain yield; Hoeing.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000200006
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Floristic composition and growth of weeds under custard apple (Annona squamosa) progenies Planta Daninha
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
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Corn cultivar intercropping with arboreal legumes for weed control Planta Daninha
Silva,P.S.L.; Silva,P.I.B.; Oliveira,V.R.; Barros,G.L.; Monteiro,A.L..
Gliricidia (Gliricidia sepium) seedlings are usually beneficial to corn crops when planted between corn rows. The objective of this work was to assess the effects of corn intercropped with gliricidia and "sabiá" (Mimosa caesalpiniifolia), a species native to the Brazilian northeastern region, on weed control and corn green ear and grain yields. The experiment was carried out at Estação Experimental da Universidade Federal Rural do Semi-Árido - UFERSA (Mossoró, State of Rio Grande do Norte, Brazil). The experimental design consisted of randomized complete blocks (multifactorial design) with five replications, arranged in split-plots. The plots consisted of corn cultivars AG1051 and BM 2022; subplot treatments (six) were no-hoeing, twice-hoeing (at 20 and 40...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gliricidia sepium; Mimosa caesalpiniifolia; Zea mays; Corn green yield; Corn grain yield.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300008
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Weed Control in Maize with Gliricidia Intercropping Planta Daninha
Tavella,L.B.; Silva,P.S.L.; Monteiro,A.L.; Oliveira,V.R.; Siqueira,P.L.O.F..
One of the very important components in the organic maize production costs refers to spending on weed control. In this research were assessed the effects of maize hybrids (AG 1051 and BR 205) in an intercropping with Gliricidia (Gliricidia sepium) and mechanical hoeing on weed control. The treatments assessed were: A - maize monocropping + two hoeings (20 and 40 days after sowing); B - maize with one hoeing at 20 days + intercropping with gliricidia sowed after hoeing; C - maize sowing intercropped with gliricidia at the time of maize sowing + hoeing at 40 days; D - maize sowing intercropped with gliricidia at the time of maize sowing without hoeing; E - monocropping maize without hoeing. In the intercroppings, gliricidia was sowed in broadcast seeding...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Gliricidia sepium; Maize yield.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200249
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Nitrogen doses and weed control via intercropping with gliricidia for corn production Planta Daninha
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
Registros recuperados: 17
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