scholarly journals COVER CROPS CHANGE THE PHYTOSOCIOLOGY OF WEEDS AND THE BANANA YIELD

2020 ◽  
Vol 7 (1) ◽  
pp. 53-59
Author(s):  
Jorgiani Ávila ◽  
Maria Gabriela Oliveira Andrade ◽  
Eduardo Pradi Vendruscolo ◽  
Jordana Dias Martins ◽  
Sebastião Ferreira Lima
Keyword(s):  
Experimental Design ◽  
Sorghum Bicolor ◽  
Cover Crops ◽  
Cajanus Cajan ◽  
Fruit Yield ◽  
Phaseolus Lunatus ◽  
Control Treatment ◽  
Significant Suppression ◽  
Weed Density ◽  
Crotalaria Spectabilis

This work aimed to evaluate the phytosociology of weeds and the fruit yield of banana (cv. Tropical) in different soil coverings. The experimental design used was randomized blocks, with eight treatments and three replications. The treatments consisted of sowing of Canavalia ensiformis, Cajanus cajan, Crotalaria juncea, Stylosanthes 'Campo Grande', Crotalaria spectabilis, Sorghum bicolor, and Phaseolus lunatus between the rows of the banana trees. A control treatment was also used without cover crops. Weed phytosociology was evaluated in four treatments. The number of hands per bunch, the number of fruits per hand, the number of fruits per bunch, and the fruit yield were estimated in all treatments. In the phytosociological survey, 23 species were identified, in 13 families, especially Asteraceae and Poaceae families. Compared to the control, the coverage with C. cajan, C. juncea, and C. ensiformis provided a reduction in weed density of 108%, 71.7%, and 14.6%, respectively. C. ensiformis and C. cajan provided the highest yield of banana fruits, with an increase of 51.2% about the control. It is concluded that C. ensiformis and C. juncea provided the most significant suppression of weeds, while C. cajan and C. ensiformis provided the highest fruit yield.

scholarly journals Dry Mass Accumulation, Nutrients and Decomposition of Cover Plants

2019 ◽  
Vol 11 (5) ◽  
pp. 152 ◽  
Author(s):  
Daiane Conceição de Sousa ◽  
João Carlos Medeiros ◽  
Julian Junio de Jesus Lacerda ◽  
Jaqueline Dalla Rosa ◽  
Cácio Luiz Boechat ◽  
...  
Keyword(s):  
Cover Crops ◽  
Cajanus Cajan ◽  
Dry Matter ◽  
Pennisetum Glaucum ◽  
Dry Mass ◽  
Dry Matter Production ◽  
Crop Species ◽  
Crotalaria Juncea ◽  
Matter Production ◽  
Crotalaria Spectabilis

The use of cover crops is an important strategy for soil management in the Brazilian Cerrado to improve no-tillage (NT) systems. For this, it is necessary know the potential of cover crop species for biomass production, nutrient cycling, and persistence of residues on the soil surface in soils and climatic conditions of this biome. Thus, the experiment was developed to evaluate the agronomic potential of cover crops cultivated on an Oxisol (Latossolo Amarelo) in the Cerrado of Piauí, Brazil. The experiment was conducted from January 2015 to July 2016. The experimental design was in randomized blocks with 11 treatments and four replicates. The treatments consisted of single and intercropped cover species. The evaluations were: dry mass production, nutritional composition of the plants, nutrient accumulation by dry mass produced and decomposition rate of the dry mass produced for each treatment. The higher dry matter production was obtained with Crotalaria juncea, Cajanus cajan (cv. IAC-Fava larga), Pennisetum glaucum and Brachiaria ruziziensis. The lower dry matter production was obtained with Mucuna aterrima, and mix of Crotalaria spectabilis + Pennisetum glaucum. The higher nutrients accumulation in the plants occurred for Cajanus cajan (cv. IAC-Fava larga), Crotalaria juncea and Crotalaria spectabilis. The cover plants studied presented good potential for soil conservation, due to the permanence of residues on the surface, except for Mucuna aterrima and Crotalaria spectabilis.

scholarly journals Efecto de la cobertura plástica y el encalado en chile, en el sureste de México.

2006 ◽  
Vol 10 (2) ◽  
pp. 91
Author(s):  
Roberto Zetina ◽  
Daniel E Uriza
Keyword(s):  
Experimental Design ◽  
Soil Ph ◽  
Management System ◽  
Total Yield ◽  
Fruit Yield ◽  
Significant Response ◽  
Control Treatment ◽  
High Input ◽  
Black Plastic ◽  
Heavy Rains

In the south of Veracruz, Mexico, 5000 ha of chili are cultivated annually in acids soils and with a low CIC. The sandy texture of the soil and the low rainfalls in the last three months of the year coincides with the productive stage of plantations established after the heavy rains of june and july. The objective of this study was to evaluate under rain conditions the effect of lime and plastic covering on the acidity of a recently exposed soil to the cultivation and production of “serrano” chili under a high input management system. The experimental design was one of divided parcels with three repetitions: in the big parcels with four dose of liming (0, 0.5, 1 and 3 t/ha of CaCO3) and in the small parcels two plastic coverings (black plastic/ white and plastic black) and a control treatment without covering. The total yield of fruit showed a significant response to the black/white plastic covering and to the interaction lime (1 ton/ha)- (black/ white plastic covering)obtaining increments of the 40% to 82% respectively. The fruit yield did not show a significant response to the lime. Treatments using lime increased the soil pH from 5.2 to 5.6 and the levels of interchangeable bases from 40 to 54 ppm K, 882- 1146 ppm Ca and 205-192 ppm of Mg.

PLANTAS DE COBERTURA E ADUBAÇÃO NITROGENADA NO MILHO EM PLANTIO DIRETO SOB INFLUÊNCIA DE DÉFICIT HÍDRICO EM SOLO DE CERRADO

2016 ◽  
Vol 15 (3) ◽  
pp. 439
Author(s):  
GUILHERME FELISBERTO ◽  
PATRÍCIA APARECIDA DE CARVALHO FELISBERTO ◽  
LEANDRO FLÁVIO CARNEIRO ◽  
PAULO CÉSAR TIMOSSI ◽  
FLÁVIO HIROSHI KANEKO ◽  
...  
Keyword(s):  
Water Deficit ◽  
Cover Crops ◽  
Nitrogen Fertilization ◽  
Cajanus Cajan ◽  
Raphanus Sativus ◽  
Pennisetum Glaucum ◽  
No Tillage ◽  
Crambe Abyssinica ◽  
Tillage System ◽  
Crotalaria Spectabilis

RESUMO – A resposta à adubação nitrogenada da cultura do milho é dependente do tipo de solo, sistema de cultivo, dose empregada e cultura antecessora. Nesse contexto, objetivou-se com o presente trabalho avaliar os efeitos dos resíduos vegetais de plantas de cobertura e da adubação nitrogenada no milho cultivado em sequência, sob sistema de plantio direto em consolidação no Cerrado. O experimento foi constituído de um fatorial 10 x 4, em delineamento de blocos casualizados e esquema de parcelas subdivididas, com quatro repetições. Os tratamentos das parcelas foram os resíduos do cultivo de dez plantas de cobertura (Cajanus cajan, Canavalia ensiformis, Crambe abyssinica, Crotalaria juncea, Crotalaria ochroleuca, Crotalaria spectabilis, Mucuna aterrima, Pennisetum glaucum, Raphanus sativus e Urochloa ruziziensis) e, nas subparcelas, foram testadas quatro doses de nitrogênio (0, 50, 100 e 150 kg ha-1 de N) em cobertura no estádio V5 da cultura do milho. Observou-se baixa resposta à adubação nitrogenada em cobertura, o que foi atribuído principalmente à ocorrência de déficit hídrico nas fases de florescimento e enchimento de grãos. De modo geral, as características agronômicas do milho foram mais influenciadas pela adubação nitrogenada do que pelas plantas de cobertura cultivadas anteriormente. O ganho médio de produtividade de grãos foi da ordem de 3,7 kg para cada 1 kg de N aplicado. O milho após Urochloa ruziziensis e Crambe abyssinica apresenta menor produtividade em relação ao uso das outras espécies de plantas de cobertura, independentemente da adubação nitrogenada.Palavras-chave: adubação verde, sistema conservacionista, veranico, Zea mays.COVER CROPS AND NITROGEN FERTILIZATION ON MAIZE GROWN IN NO-TILLAGE SYSTEM UNDER WATER DEFICIT ON CERRADO SOILABSTRACT - The response to nitrogen fertilization of the corn is dependent on the type of soil, cropping system, dose used and preceding crop. In this context, the goal of the present study was to evaluate the effects of cover crops residues and nitrogen fertilization on corn grown in succession, under no-tillage system in the Cerrado region. The experiment was arranged in a factorial 10 x 4, in a randomized complete block design and subdivided plot scheme, with four replications. The treatments of the plots were the residues of ten cover crops (Cajanus cajan, Canavalia ensiformis, Crambe abyssinica, Crotalaria juncea, Crotalaria ochroleuca, Crotalaria spectabilis, Mucuna aterrima, Pennisetum glaucum, Raphanus sativus and Urochloa ruziziensis) and in the subplots four nitrogen doses (0, 50, 100 and 150 kg ha-1 of N) were tested in the V5 stage of the corn. A low response to nitrogen fertilization was observed, which was mainly attributed to the occurrence of water deficit at the flowering and grain filling stages. In general, the agronomic characteristics of corn were more influenced by nitrogen fertilization than by the cover crops previously cultivated. The average gain of grain yield was of the order of 3.7 kg for each 1 kg ha-1 of N applied. Corn after Urochloa ruziziensis and Crambe abyssinica presented lower productivity compared to the use of other cover crop species, regardless nitrogen fertilization.Keywords: green manure, conservation tillage system, summer water deficit, Zea mays.

scholarly journals Effect of cover crops residues on crambe cultivation

2018 ◽  
Vol 71 (2) ◽  
pp. 8517-8523 ◽  
Author(s):  
Eduardo Pradi Vendruscolo ◽  
Daniel Cardoso Brandão ◽  
Lucas Marquezan Nascimento ◽  
Luiz Fernandes Cardoso Campos ◽  
Carlos De Melo Silva Neto ◽  
...  
Keyword(s):  
Sorghum Bicolor ◽  
Cover Crops ◽  
Cajanus Cajan ◽  
Pennisetum Glaucum ◽  
Crotalaria Juncea ◽  
Crambe Abyssinica ◽  
Canavalia Ensiformis

El cultivo de Crambe abyssinica, es explotado comercialmente en Brasil, así la importancia de desarrollar estudios que posibiliten el perfeccionamiento de las técnicas involucradas en su producción. La plantación sobre restos culturales de diferentes especies de cobertura puede aumentar el desarrollo vegetativo y productivo del crambe. Así, el objetivo de este trabajo fue evaluar el desarrollo vegetativo y reproductivo del crambe cultivado sobre restos culturales de diferentes especies, en sucesión al cultivo de lechuga crespa. El delineamiento experimental utilizado fue en bloques al azar. Los tratamientos correspondieron a restos culturales de plantas de cobertura, siendo estas: crotalária (Crotalaria juncea), frijol guandu (Cajanus cajan), frijol de porco (Canavalia ensiformis), milheto (Pennisetum glaucum) y sorgo (Sorghum bicolor), además de un tratamiento control, con uso de vegetación espontánea. A los 49 días se evaluó altura de planta, diámetro de tallo, número de hojas, contenido relativo de clorofila, número de ramas laterales, masa seca y fresca de la parte aérea. Las variables productivas se evaluaron a los 95 días después de la siembra, obteniendo la masa de granos por planta, el peso hectolitro de los granos. Posteriormente fue estimada la productividad de cada tratamiento y el ingreso bruto. Se verificó que mantener los restos culturales de plantas de cobertura beneficia el desarrollo vegetativo de la cultura de crambe y no altera la productividad de los granos. Esta técnica aumenta el beneficio económico del cultivo, siendo recomendada durante el barbecho, en detrimento del manejo de plantas espontáneas.

scholarly journals PRODUÇÃO DE FITOMASSA POR PLANTAS DE COBERTURA NO AGRESTE MERIDIONAL DE PERNAMBUCO

2020 ◽  
Vol 18 (s/n) ◽  
pp. 31
Author(s):  
Vandson Felipe Dos Santos ◽  
Lucas Figueira Da Silva ◽  
José Rômulo De Araújo Neto ◽  
Vanilson Pedro Da Silva ◽  
Alexandre Tavares Da Rocha ◽  
...  
Keyword(s):  
Zea Mays ◽  
Sorghum Bicolor ◽  
Vigna Unguiculata ◽  
Cajanus Cajan ◽  
Pennisetum Glaucum ◽  
Crotalaria Spectabilis

<p>Objetivou-se com este trabalho quantificar a produção de fitomassa seca de diferentes plantas de cobertura, nas condições edafoclimáticas do Agreste Meridional de Pernambuco.O experimento foi realizado na Fazenda Experimental da UFRPE/UAG, obedecendo o delineamento experimental de blocos casualizados com quatro repetições e os seguintes tratamentos: T1- crotalária [<em>Crotalaria spectabilis</em>], T2- Feijão de corda [<em>Vigna unguiculata</em> L.], T3- Guandu-anão [<em>Cajanus cajan </em>(L.) Millsp.], T4- Sorgo [<em>Sorghum bicolor </em>(L.) Moench], T5- Milheto [Pennisetum glaucum L.], T6- Milho [<em>Zea mays </em>L.]. Avaliou-se a altura da planta (AP), fitomassa verde (FV) e fitomassa seca (FS) no estádio de florescimento pleno das plantas.Os dados foram submetidos ao teste F (P&lt;0,05) e as médias comparadas pelo teste de Tukey a 5% de significância, utilizando-se o programa estatístico Sisvar. Os resultados mostraram que o sorgo destacou-se entre todas as plantas de cobertura apresentando a maior quantidade de FV e FS e maior altura das plantas. Entre as leguminosas a crotalária apresentou a maior quantidade de FV e FS seguida do guandu. Assim, essas culturas apresentam-se como boas alternativas para a produção de palhada nas condições edafoclimáticas do estudo.</p>

scholarly journals Legume and Grass Cover Crops for Seedless Watermelon Production

2002 ◽  
Vol 12 (2) ◽  
pp. 245-249 ◽  
Author(s):  
M. Rangappa ◽  
A.A. Hamama ◽  
H.L. Bhardwaj
Keyword(s):  
Cover Crops ◽  
Cover Crop ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Control Treatment ◽  
Hairy Vetch ◽  
Crimson Clover ◽  
Legume Cover Crops ◽  
Seedless Watermelon

Although there is increasing interest in reducing the use of nitrogen (N) fertilizers due to the potential of unused N causing pollution of surface and groundwater, N is a major nutrient for plant growth. Our objective was to determine the potential of using winter legume cover crops to meet the N needs of seedless watermelon (Citrullus lanatus), a potential cash crop for farmers in Virginia. Fruit number, fruit weight, fruit yield, and fruit quality traits (flesh to rind ratio, water content, total soluble solids, sugar content, and pH) of seedless watermelons were evaluated in replicated experiments in Virginia at three locations during 1997-98 and two locations during 1998-99 following cover crop treatments consisting of crimson clover (Trifolium incarnatum), hairy vetch (Vicia villosa), crimson clover + rye (Secale cereale), hairy vetch + rye, and a bareground control treatment that received 100 lb/acre (112 kg·ha-1) of N. At all five locations, the bareground control treatment resulted in fewer fruit [1803 fruit/acre (4454 fruit/ha)], lower fruit weight [9.8 lb (4.5 kg)], and lower fruit yield [8.9 tons/acre (20.0 t·ha-1)] compared to the four cover crop treatments. The crimson clover + rye and hairy vetch treatments resulted in highest numberof fruit [2866 and 2657 fruit/acre (7079 and 6563 fruit/ha), respectively], whereas the highest fruit yield was obtained following hairy vetch [21.2 tons/acre (49.8 t·ha-1)], hairy vetch + rye [20.3 tons/acre (45.5 t·ha-1)], and crimson clover + rye [19.6 tons/acre (43.9 t·ha-1)]. Cover crop treatments did not affect the quality of watermelon flesh. The seedless watermelon fruit averaged 1.4 flesh: 1 rind ratio, 90% water content, 9.5% total soluble solids, 8.0% sugar, and a pH value of 5.9. These results indicated that legume cover crops, such as crimson clover and hairy vetch, can be successfully used to produce seedless watermelons, in a no-till system, without any use of N fertilizers with dryland conditions.

scholarly journals PRODUÇÃO DE FITOMASSA E EXTRAÇÃO DE MACRONUTRIENTES POR PLANTAS DE COBERTURA CULTIVADAS NA ESTAÇÃO SECA

Nativa ◽  
2018 ◽  
Vol 6 (6) ◽  
pp. 619
Author(s):  
Ana Lúcia Scavazza ◽  
Marcio Roberto Soares ◽  
José Carlos Casagrande ◽  
Simone Daniela Sartorio de Medeiros ◽  
Paulo Henrique Pizzi de Santi
Keyword(s):  
Biomass Production ◽  
Cover Crops ◽  
Cajanus Cajan ◽  
Pennisetum Glaucum ◽  
Pigeon Pea ◽  
Sao Paulo ◽  
Dry Season ◽  
São Paulo ◽  
South Central ◽  
Crotalaria Spectabilis

Na região centro-sul do Estado de São Paulo, informações sobre a adaptabilidade de plantas de cobertura cultivadas na estação seca são escassas. Objetivou-se com este estudo investigar a produção de fitomassa e extração de macronutrientes em plantas de cobertura durante a estação seca, em um Latossolo Vermelho distrófico, no município de Araras-SP.  O delineamento foi em blocos ao acaso, com cinco tratamentos, correspondendo a espécies, em seis blocos. Na entressafra de milho 2015/2016, foram cultivadas: crotalária-spectabilis (Crotalaria spectabilis Roth.), feijão-guandu (Cajanus cajan L.), feijão-de-porco (Canavalia ensiformes L.), mucuna-preta (Stilozobium aterrimum Piper et Tray) e milheto (Pennisetum glaucum L.). O milheto foi a espécie que produziu mais fitomassa seca (acima de 8 t ha-1) e a que mais extraiu macronutrientes (185;10;106;42;18 e 8 kg ha-1 de N, P, K, Ca, Mg e S, respectivamente), apresentando relação C/N inferior a 25, sugerindo que seus resíduos sofreriam uma rápida decomposição e mineralização.A análise de agrupamento indicou que o feijão-guandu obteve desempenho semelhante ao do milheto. Crotalária-spectabilis apresentou a menor fitomassa seca e extraiu menor quantidade de macronutrientes. Neste estudo, milheto e feijão-guandu foram as espécies que mais contribuíram para cobertura do solo e para a reciclagem de nutrientes na estação seca.Palavras-chave: biomassa, nutrição, relação C/N, safrinha. BIOMASS PRODUCTION AND NUTRIENT ACCUMULATION BY COVER CROPS CULTIVATED IN THE DRY SEASON ABSTRACT: In the south-central region of the State of São Paulo, data on the adaptability of cover crops grown in the dry season are insuficient. The objective of this study was to investigate the biomass production and extraction of macronutrients in cover crops during the dry season, in a Oxysoil (LatossoloVermelho), in the city of Araras-SP. The design was in randomized blocks, with five treatments, corresponding to species in six blocks. In the maize off-season 2015/2016, were cultivated: crotalaria spectabilis (Crotalaria spectabilis Roth.), pigeon pea (Cajanus cajan L.), pig bean (Canavalia ensiformes L.), velvet bean (Stilozobium aterrimum Piper et Tray) and millet (Pennisetum glaucum L.). Millet was the species that produced the highest dry matter average (above 8 tons ha-1) and the one that most extracted macronutrients (185;10;106;42;18 and 8 Kg ha-1 of N, P, K, Ca, Mg and S, respectively), showing a C/N ratio of less than 25, suggesting that its residues would undergo rapid decomposition and mineralization. The clustering analysis indicated that the pigeon pea had similar performance to millet. Crotalaria-spectabilis presented the lowest dried biomass extracted a smaller amount of macronutrients. In this study, millet and pigeon pea were the species that contributed the most to cover the soil and to recycle nutrients in the dry season.Keywords: biomass, nutrition, C/N ratio, off-season.

scholarly journals Potencial de espécies utilizadas como adubo verde no manejo integrado de plantas daninhas

2004 ◽  
Vol 22 (3) ◽  
pp. 337-342 ◽  
Author(s):  
E.A.L. Erasmo ◽  
W.R. Azevedo ◽  
R.A. Sarmento ◽  
A.M. Cunha ◽  
S.L.R. Garcia
Keyword(s):  
Sorghum Bicolor ◽  
Cajanus Cajan ◽  
Mucuna Pruriens ◽  
Pennisetum Americanum ◽  
Canavalia Ensiformis ◽  
Amaranthus Spinosus ◽  
Crotalaria Spectabilis

O presente trabalho foi conduzido na Estação Experimental da Universidade Federal do Tocantins, Gurupi-TO, Brasil. O experimento foi instalado com o objetivo de avaliar durante 60 dias, em campo, a interferência de oito espécies utilizadas freqüentemente como adubos verdes (Mucuna aterrima, Mucuna pruriens, Crotalaria ochroleuca, Crotalaria spectabilis, Canavalia ensiformis, Cajanus cajan, Pennisetum americanum e Sorghum bicolor, híbrido BR304) sobre a comunidade infestante. As espécies de plantas daninhas mais freqüentes na área do experimento foram: Digitaria horizontalis, Hyptis lophanta e Amaranthus spinosus. Foram realizadas amostragens aos 15, 30, 45 e 60 dias após a formação da cobertura, utilizando um quadrado de amostragem equivalente a 0,25 m². As plantas daninhas foram devidamente identificadas, coletadas, secas e pesadas. O delineamento experimental utilizado foi inteiramente casualizado e constou de nove tratamentos, com quatro repetições cada. Verificou-se que as espécies C. spectabilis, S. bicolor, C. ochroleuca, M. aterrima e M. pruriens reduziram significativamente o número e o peso da matéria seca da população das plantas daninhas avaliadas (D. horizontalis, H. lophanta e A. Spinosus), principalmente as duas últimas, enquanto P. americanum mostrou-se a menos eficiente nesse aspecto.

Ecological Mowing: An Option for Sustainable Weed Management in Young Citrus Orchards

2017 ◽  
Vol 31 (2) ◽  
pp. 260-268 ◽  
Author(s):  
Rodrigo Martinelli ◽  
Patrícia A. Monquero ◽  
Anastácia Fontanetti ◽  
Patrícia M. Conceição ◽  
Fernando A. Azevedo
Keyword(s):  
Cover Crops ◽  
Weed Management ◽  
Cover Crop ◽  
Conservation Agriculture ◽  
Fruit Yield ◽  
Weed Density ◽  
Canopy Volume ◽  
Acid Lime ◽  
Signal Grass ◽  
Citrus Trees

The citrus yield in Brazil is not ranked among the best in the world, potentially due to inadequate management by citrus growers. The low adoption of conservation agriculture (CA) techniques and the improper application of herbicides are also well-known problems. Thus, this study evaluated the use of CA techniques, and twoUrochloaspecies (ruzi grass and signal grass) were used as cover crops. Two different types of mowers (ecological, EM; conventional, CM) launched the mowed biomass into different positions within a young Tahiti acid lime orchard (up to four years old). In addition, the integration of glyphosate into this management system was evaluated, with (GLY) and without (NO GLY) glyphosate application. This experiment was conducted across three growing seasons (2011-2014), in Mogi Mirim, São Paulo State, Brazil. The cover crop biomass yields and the effects of the mowing treatments, weed density, vegetative growth and fruit yields of the Tahiti acid lime trees were evaluated. In terms of major results, signal grass produced higher biomass yield values (up to 64%) than ruzi grass; EM promoted higher mowed biomass values in the intra-row (up to 5.1 ton ha−1, 9.0 times higher than CM), and a higher canopy volume (up to 33% than CM). These results were enhanced when ruzi grass was associated with the EM (56% lower weed density; 126% higher fruit yield than CM) and with GLY (52% higher fruit yield than NO GLY); and EM with GLY (43% lesser weed density and 107% higher fruit yield than NO GLY). Overall, ruzi grass was a good cover crop because it provided less competition for the citrus trees, EM provided a mulch layer in the intra-row of the citrus trees, and associated with GLY, these approaches could provide options for an integrated and more sustainable weed management, primarily for young Tahiti acid lime orchards.

scholarly journals Produtividade do feijoeiro irrigado devido a reguladores de crescimento e culturas antecessoras de cobertura

Bragantia ◽  
2010 ◽  
Vol 69 (2) ◽  
pp. 371-375 ◽  
Author(s):  
Tatiely Gomes Bernardes ◽  
Pedro Marques Da Silveira ◽  
Marcos Antônio Machado Mesquita
Keyword(s):  
Zea Mays ◽  
Sorghum Bicolor ◽  
Cajanus Cajan ◽  
Zea Mays L ◽  
Pennisetum Glaucum ◽  
Panicum Maximum ◽  
Brachiaria Brizantha ◽  
Stylosanthes Guianensis ◽  
Sorghum Bicolor L ◽  
Crotalaria Spectabilis

O objetivo deste trabalho foi avaliar os efeitos de regulador de crescimento aplicado na semente e foliar e de culturas de cobertura na produtividade do feijoeiro irrigado. O delineamento experimental foi em parcelas subdivididas, em blocos casualizados com quatro repetições. Nas parcelas constaram como culturas utilizadas como coberturas do solo, as leguminosas guandu-anão (Cajanus cajan L. Millsp); estilosantes (Stylosanthes guianensis Aublet Sw. var. vulgaris); crotalária (Crotalaria spectabilis Roth.), e as gramíneas milheto (Pennisetum glaucum L. R. Br.); sorgo granífero (Sorghum bicolor L. Moench); capim mombaça (Panicum maximum Jacq); braquiária (Brachiaria brizantha Hochst ex A. Rich. Stapf.); e braquiária em consórcio com milho (Zea mays L.). Nas subparcelas constaram os seguintes tratamentos: testemunha; 500 mL de regulador de crescimento (RC) em 100 kg de sementes; 250 mL ha-1 de RC no estágio de desenvolvimento V4, tratamento foliar; e 500 mL de RC em 100 kg de sementes e 250 mL ha-1 de RC com aplicação foliar, no estágio de desenvolvimento V4. Aos 84 dias após o corte das culturas de cobertura foi realizada a semeadura do feijoeiro, cultivar BRS Valente, sob pivô central. Foram avaliados o rendimento de grãos e os componentes de rendimento do feijoeiro. O rendimento do feijoeiro não foi positivamente influenciado pelos tratamentos, mas sim pelas culturas de cobertura.

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