Nitrogen fertilization on intercropping of lettuce and rocket

Júnior, Aurélio Paes Barros; Filho, Arthur Bernardes Cecílio; Rezende, Bráulio Luciano Alves; Porto, Diego R Queirós; Prado, Renato de Mello

doi:10.1590/s0102-05362011000300024

Cited by 8 publications

(11 citation statements)

References 8 publications

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“…These authors also found no differences in fresh mass between sole cropping (475.8 g m -1 ) and intercropping (440.5 g m -1 ) in the spring, regardless of the time of the sowing of the rocket relative to the transplantation of crinkly lettuce. Similarly, Barros Júnior et al [ 12 ] found no difference in fresh mass between sole cropping and intercropping with crisp lettuce in the spring.…”

Section: Resultsmentioning

confidence: 93%

“…Barros Júnior et al [ 12 ] also reported a higher fresh mass of lettuce in a sole crop than in an intercrop with rocket in the spring. Barbosa et al [ 14 ] reported that fresh mass was higher with intercropping (crisp lettuce and rocket) than sole cropping in the autumn but not winter.…”

Section: Resultsmentioning

confidence: 99%

“…Barbosa et al [ 14 ] also obtained higher productivities with sole cropping than intercropping in two growing seasons with the same three lettuce cultivars, which ranged from 3.16 to 3.74 kg m -2 in autumn and from 1.78 to 1.90 kg m -2 in winter. Barros Júnior et al [ 12 ] reported that productivity of rocket in the spring was higher with sole cropping (1.6 kg m -2 ) by approximately 31%.…”

Section: Resultsmentioning

confidence: 99%

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Effect of population density of lettuce intercropped with rocket on productivity and land-use efficiency

et al. 2018

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The objective of this study was to evaluate the influence of the spacing of lettuce rows on the production of a lettuce-rocket intercropping system over two growing seasons (11 August to 25 September 2011 and 12 January to 24 February 2012) in Jaboticabal, São Paulo, Brazil. We evaluated 11 treatments in each season: lettuce-rocket intercrops with five row spacings for the lettuce (0.20, 0.25, 0.30, 0.35 and 0.40 m) and the rocket planted midway between the lettuce rows, sole crops of lettuce at the same five row spacings and a sole crop of rocket. Fresh and dry masses of the lettuce and rocket and number of lettuce leaves per plant were highest with a lettuce row spacing of 0.40 m, but the productivities of the lettuce and rocket were higher with a lettuce row spacing of 0.20 m. The productivities and fresh and dry weights of the lettuce and rocket and the number of lettuce leaves per plant were highest in the sole crops, but the fresh and dry weights of the rocket were higher with intercropping. The land equivalent ratios were >1.0 in both seasons in all intercrops and were highest for the densest crop (1.41). Intercropping was therefore 41% more efficient than sole cropping for the production of lettuce and rocket.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Effect of population density of lettuce intercropped with rocket on productivity and land-use efficiency

et al. 2018

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“…(2018), Bezerra Neto et al (2012), and Oliveira et al (2010). However, due to a lack of knowledge regarding the nitrogen (N) requirement for both crops, a factor modified by the coexistence of species (BARROS JÚNIOR et al, 2011), the fertilization concentration used for intercropping is empirically based on the recommended nutrient doses for monocrops.…”

Section: Introductionmentioning

confidence: 99%

Nitrate Accumulation in Lettuce and Rocket in Response to Nitrogen Fertilization in Intercropping

et al. 2020

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In the cultivation of leafy vegetables, it is common to apply high amounts of nitrogen fertilizer. The imbalance between the absorption and the use of nitrogen (N) by the plant increases the nitrate content and decreases the quality of the vegetables because nitrate has a strong association with compounds harmful to human health. On the other hand, there is a lack of information on how N dose in intercropping, in order to improve yield, affects the quality (nitrate content) of vegetables. Thus, the objective of this study was to evaluate the nitrate content of intercropped lettuce and rocket, with nitrate content acting as a function of the nitrogen dose applied to these crops. The experiment was carried out at UNESP, Jaboticabal, SP, from September to December 2006. The experimental design was a complete randomized block design with four replications. The treatments were arranged in a 4 × 4 + 2 factorial scheme, with four varying concentrations of N each for lettuce and rocket (0, 65, 130 and 195 kg ha-1 of N), plus two treatments corresponding to lettuce and rocket monocrops. Nitrate content in lettuce under intercropping is 42% less compared to that in the monocrop. Increasing nitrogen concentrations increased nitrate levels for lettuce and rocket under intercropping; however, these levels are below those found for their respective monocrops.

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“…There are several vegetables combinations that can be used in intercropping, with the lettuce being a crop frequently used (COSTA et al, 2007;REZENDE et al, 2011;MOTA et al, 2012;CECÍLIO FILHO et al, 2013;CECÍLIO FILHO et al, 2015). Among the leafy vegetables, rocket is a crop that can be used as an intercrop, due to its erect growth and high marketing price, presenting a great combination with lettuce (BARROS JÚNIOR et al, 2011;OLIVEIRA et al, 2010;BARBOSA et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Economic Feasibility of Lettuce Intercropped With Rocket in Function of Spacing and Growing Season

Nascimento

Filho

2018

Rev. Caatinga

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Intercropping is a production system that can reduce the production cost and increase the profitability of vegetable producers, since it permits more efficient land and agricultural inputs use. In order to evaluate the effect of lettuce plant density on the economic feasibility of lettuce-rocket intercropping system over two growing seasons (winter and summer), two experiments were conducted in the field at São Paulo State University “Júlio de Mesquita Filho” (UNESP), Jaboticabal, São Paulo, Brazil. The treatments consisted of five lettuce-rocket intercrops with spacing between lettuce rows of: 0.20; 0.25; 0.30; 0.35 and 0.40 m, five sole crop of lettuce in the same spacing between rows adopted in the intercropping system, and a sole cropping of rocket with spacing between rows of 0.20 m. The statistical design adopted was the complete randomized block with four replicates. During winter, higher profitability was achieved with the highest population density. Highest profitability of the crops in both seasons was obtained in summer.

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Nitrogen fertilization on intercropping of lettuce and rocket

Cited by 8 publications

References 8 publications

Effect of population density of lettuce intercropped with rocket on productivity and land-use efficiency

Effect of population density of lettuce intercropped with rocket on productivity and land-use efficiency

Nitrate Accumulation in Lettuce and Rocket in Response to Nitrogen Fertilization in Intercropping

Economic Feasibility of Lettuce Intercropped With Rocket in Function of Spacing and Growing Season

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