Cultivares de alface em sistemas solteiro e consorciado com cenoura em Mossoró

Negreiros, Maria Zuleide de; Neto, Francisco Bezerra; Porto, Vania Christina Nascimento; Santos, Ricardo Henrique Silva

doi:10.1590/s0102-05362002000200008

Cited by 17 publications

(16 citation statements)

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“…It is noteworthy that differences occur between the cultures and the cultivars when in intra or interspecific competition, and this fact may be related to their genetic differences. Corroborating with this paper, Negreiros et al (2002), when testing five lettuce cultivars (Babá de Verão, Elisa, Great Lakes, Regina and Tainá) cultivated in coexistence with carrots, observed that Babá de Verão had a larger stem diameter than the others.…”

Section: (A) (B)supporting

confidence: 60%

“…The productivity losses are a result of the high aggressiveness that ryegrass shows in relation to agricultural cultures, when competing for the environmental resources available, as reported by Agostinetto et al (2008) and Tironi et al (2014). Negreiros et al (2002) also observed productivity losses of lettuce due to the interspecific competition occurred when this culture lived in coexistence systems with carrots. The population increase of ryegrass plants caused a higher GM accumulation up to the population of 32 plants per pot; after that, the studied variable was stabilized, and this fact may be related to the intraspecific competition for the environmental resources ( Figure 5B).…”

Section: (A) (B)supporting

confidence: 55%

“…However, most of the areas where lettuce (Lactuca sativa) is cultivated in Brazil are open fields, which causes problems, such as damages caused by solar radiation, attacks by pathogens and competition between the culture and weeds (Sala & Costa, 2012). Oftentimes, lettuce is cultivated on an intercropping with other vegetables doi: 10.1590/S0100-83582016340200005 (Negreiros et al, 2002); however, the area designated for cultivation is characterized by intensive soil handling and excessive use of agricultural inputs, fertilizers and irrigation, in addition to the difficulty to control weeds (Oliveira et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Competitive Ability of Lettuce with Ryegrass1

et al. 2016

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-The objective of the study was to evaluate the competitive ability of summer crisp and butterhead lettuce types in coexistence with populations of ryegrass. The experimental design was completely randomized in a factorial 2 x 7 scheme, with four replications. On the A factor the lettuce types (summer crisp and butterhead) were allocated and, on B, the densities of ryegrass (0, 2, 4, 8, 16, 32 and 64 plants per pot). The number of leaves, chlorophyll content, leaf area, green mass and dry mass of the lettuce types and ryegrass were evaluated, and the diameter of the culture stem and the tiller number of the weed were determined. Differences in competitive ability between the lettuce types in competition with ryegrass were found, and butterhead was the most competitive when compared with summer crisp for all variables studied. There was an average loss of leaf area in lettuce types of up to 80% when it competed with ryegrass in the populations involved. Ryegrass is a very competitive weed to infect lettuce, and its handling is necessary, even at low densities to avoid productivity losses. The butterhead type of lettuce supports longer competition with ryegrass compared to summer crisp. (0, 2, 4, 8, 16, 32 Keywords: interference, Lactuca sativa, Lolium multiflorum. RESUMO -Objetivou-se neste estudo avaliar a habilidade competitiva dos tipos de alface, crespa e lisa, em convivência com populações de azevém. O delineamento experimental adotado foi inteiramente casualizado, arranjado em esquema fatorial 2 x 7, com quatro repetições. No fator A alocaram-se os tipos de alface (crespa e lisa) e, no B, as populações de azevém

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Section: (A) (B)supporting

confidence: 60%

Section: (A) (B)supporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

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Competitive Ability of Lettuce with Ryegrass1

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“…Na região nordeste, os estudos ainda são incipientes e apresentam amplas possibilidades. Entretanto, já ficou comprovada a eficiência agroeconômica de sistemas de cultivo consorciados entre as culturas da cenoura e alface (BEZERRA NETO et al, 2003;BEZERRA NETO et al, 2005;NEGREIROS et al, 2002;OLIVEIRA et al, 2004;PIMENTEL et al, 2009), alface e coentro (FREITAS et al, 2004;OLIVEIRA et al, 2005), beterraba e rúcula (GRANGEIRO et al, 2007). Na literatura consultada, não foram encontrados relatos de trabalhos científicos sobre a consorciação de beterraba e coentro.…”

Section: Introductionunclassified

Avaliação agroeconômica das culturas da beterraba e coentro em função da época de estabelecimento do consórcio

Grangeiro¹,

Santos

Freitas

et al. 2011

Rev. Ciênc. Agron.

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Resumo -A consorciação de culturas é uma prática de cultivo usada na produção de hortaliças, e que influencia sobremaneira a produtividade dessas culturas, além de gerar vários benefícios agroeconômicos. O objetivo do presente trabalho foi avaliar os rendimentos de beterraba (Beta vulgarias L.) e coentro (Coriandrum sativum L.) em função da época de estabelecimento do consórcio entre essas culturas. O trabalho foi conduzido na Universidade Federal Rural do Semiárido, Mossoró-RN, durante o período de julho a setembro de 2006. O delineamento experimental utilizado foi em blocos completos aleatorizados, com sete tratamentos e quatro repetições. Os tratamentos analisados corresponderam aos cultivos consorciados de beterraba e coentro plantados aos 0; 7 e 14 dias após a semeadura da beterraba (Tratamentos 1; 2 e 3), cultivo solteiro da beterraba (Tratamento 4) e, os cultivos solteiros do coentro plantados nas mesmas épocas de estabelecimento dos consórcios (Tratamentos 5; 6 e 7). O cultivo consorciado de beterraba com coentro é agroeconomicamente viável. Ele deve ser estabelecido com o plantio do coentro realizado simultaneamente ou aos sete dias após a semeadura da beterraba. Palavras-chave -Beterraba. Coentro. Cultivos agrícolas.Abstract -Intercropping is a cropping practice widely used in the production of vegetables, and that greatly influences the productivity of these crops, and generates multiple agroeconomic benefits. The aim of this study was to evaluate the yield of sugar beet (Beta vulgaris L.) and coriander (Coriandrum sativum L.) depending on the time of intercropping establishment between these crops. The work was conducted at the Universidade Federal Rural do Semi-arid, Mossoró, RN, during the period from July 2006 to September 2006. The experimental design was of randomized complete blocks with seven treatments and four replications. The treatments consisted of the intercropping of coriander and beet planted at 0, 7 and 14 days after sowing of beet (Treatments 1; 2 and 3), sole crop of beet (Treatment 4) and the sole crops of coriander planted at the same times of intercropping establishment (Treatments 5; 6 and 7). The intercropping of sugar beet with coriander is agronomically feasible, and that this should be planted simultaneously or with the planting of coriander at seven days after sowing of beets, when were also obtained higher values of land equivalent ratio.

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“…Isso indica que a RAE ou IE avaliam a eficiência do consórcio de culturas, em relação aos monocultivos, para as produções em monocultivo se igualarem às de um hectare das mesmas culturas em associações (VIEIRA, 1989). Negreiros et al (2002), destacam que o consórcio de cultura é prática tradicional na produção de alimentos em regiões tropicais de pequenas propriedades, onde o objetivo dessas associações tem sido de otimizar a utilização de recursos ambientais, de área e de mão-deobra. Sullivan (2001) da marcela foram avaliadas como parcelas subdivididas no tempo.…”

Section: Introductionunclassified

Produtividade da marcela [Achyrocline satureioides (lam.) DC.]em cultivo solteiro e consorciado com tansagem (Plantago major l. )

Ajalla¹,

Vieira

Zárate

et al. 2009

Ciênc. agrotec.

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Termos para indexação: Planta medicinal, associação de culturas, população de planta, marcela, Achyrocline satureioides, tansagem, Plantago major. ABSTRACTThe objective of this work was to evaluate the growth and the yield of marcela [Achyrocline satureioides (Lam.) DC.] biomass, in a monocrop system and intercropped with common plantain (Plantago major L.) as well as to determine the population of these medicinal plants in a more efficient intercrop system, in order to increase the yield and the economic return. Six treatments were established: two rows of marcela spaced 0.4 m from each other (M 0,40 ), two rows of marcela spaced 0.25 m (M 0.25 ), two rows of common plantain spaced 0.75 m (T 0.75 ), three rows of common plantain spaced 0.40 m (T 0.40 ), two rows of marcela alternated with three rows of common plantain (M 0.40 T 0.40 ), and two rows of marcela alternated with three rows of common plantain (M 0.25 T 0.75 ). The experimental design was the randomized blocks with four replications. Harvests of marcela were performed at 180, 210 and, 225 days after the transplantation. The treatments did not influence the heights of marcela and common plantain. Yields of marcela were influenced only by the harvest dates and they were significantly higher in the first and the second dates, showing fresh mass of flowers of 2.51; 2.63 and 1.28 t ha -1 , respectively, at 180, 210 and 225 days after the transplantation. Fresh mass of common plantain leaves was not influenced by the intercropping, but it was higher under T 0.40 (6.13 t ha -1 ) space than under T 0.75 (3.32 t ha -1 ). Land Equivalent Ratio of the M 0.40 T 0.40 intercropping was 1.6 and that of M 0.25 T 0.75 was 2.4. Regarding the gross income, increases of 30% were observed for the treatment M 0.40 T 0.40 and 77% for the treatment M 0.40 T 0.40 when compared to the treatment M 0.25 and 70% and 131%, respectively, when compared to T 0.40.

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Cultivares de alface em sistemas solteiro e consorciado com cenoura em Mossoró

Cited by 17 publications

References 3 publications

Competitive Ability of Lettuce with Ryegrass1

Competitive Ability of Lettuce with Ryegrass1

Avaliação agroeconômica das culturas da beterraba e coentro em função da época de estabelecimento do consórcio

Produtividade da marcela [Achyrocline satureioides (lam.) DC.]em cultivo solteiro e consorciado com tansagem (Plantago major l. )

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