Influência da densidade de plantas e do uso de fungicida nas doenças foliares e na produtividade de cebola

Harms, Mônica Gabrielle; Pria, Maristella Dalla; Rezende, Bráulio La; Prestes, André Mc; Dalazoana, Felipe

doi:10.1590/s0102-053620150000200011

Cited by 9 publications

(9 citation statements)

References 6 publications

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“…For the relationship between total yield and stand, there was a positive linear correlation, significant at p ≤ 0.01 (r = 0.57**). These results are consistent with those of Harms et al (2015), who evaluated the influence of onion planting density on yield and observed that the total yield increased linearly with increasing planting density.…”

Section: Resultssupporting

confidence: 92%

Onion yield as a function of soil tillage system and soil water content

Feitosa

Fernándes

Cecon

et al. 2020

Rev. bras. eng. agríc. ambient.

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Excessive tillage operations under inadequate conditions can raise the cost of agricultural production and lead to soil degradation without adequate crop response. The objective of this study was to evaluate the onion crop response to soil water contents and tillage systems. Three tillage systems were evaluated: P1 (plowing + two harrowings + two seedbed raising operations), P2 (two harrowings + one seedbed raising operation), P3 (one harrowing + one seedbed raising operation); and four soil water contents: 12, 15, 23 and 26%. The experiment was conducted in the irrigated perimeter of Tourão, Juazeiro, BA, Brazil (9° 24’ 7.3” S; 40° 26’ 8.7” W and altitude of 368 m), in 2017, and was installed in split plots, in a randomized block design, with four repetitions. Water contents were arranged in the plots and tillage systems in the subplots. Crop response to the applied treatments was evaluated through the determination of the emergence speed index of the seedlings, regularity of the longitudinal distribution of seedlings, final stand, total and marketable yields of the crop and yield per bulb transverse diameter class. The variation of soil water content had a quadratic effect on the variables emergence speed index, final stand and total onion yield. The treatments did not significantly affect the longitudinal distribution of plants and marketable yield. The tillage system composed of one harrowing and one seedbed raising operation showed to be the most appropriate for onion cultivation by direct seeding.

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Section: Resultssupporting

confidence: 92%

Onion yield as a function of soil tillage system and soil water content

Feitosa

Fernándes

Cecon

et al. 2020

Rev. bras. eng. agríc. ambient.

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“…In this context, various studies carried out in Brazil demonstrate that planting density is a factor of extreme importance to obtain high production. Menezes Júnior & Vieira Neto (2012) and Harms et al (2015) proved that increase in density by reducing planting spacing leads to increase in total yield of bulbs.…”

Section: Introductionmentioning

confidence: 99%

Performance of onion cultivars as a function of spacing between plants

Santos

Grangeiro

Sousa

et al. 2018

Rev. bras. eng. agríc. ambient.

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The objective of this study was to evaluate the performance of onion cultivars as a function of the spacing between plants. The experimental design was a complete randomized block in a 3 x 4 factorial scheme, with four replicates. The treatments were composed of the combination between three onion cultivars (Vale Ouro IPA 11, Serena and Rio das Antas) and four plant spacings (3, 6, 8 and 10 cm). The evaluated characteristics were total, marketable and unmarketable yield of bulbs, percentages of bulbs in classes 1, 2, 3 and 4, bulb mean weight, bulb dry weight. In onion cultivation, the cultivars Rio das Antas and Serena are the most indicated, with the highest marketable yields at 6 and 3 cm spacings between plants, respectively. The cultivar Vale Ouro IPA 11 presented higher marketable yield for the spacing of 5 cm between plants.

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“…Entretanto é possível que cultivos muito adensados prejudiquem o ganho de massa de cada planta. Quando o número de plantas aumenta por unidade de área, atinge-se um ponto no qual as plantas competem por fatores essenciais de crescimento, como nutrientes, luz e água (HARMS et al, 2015).…”

Section: Resultsunclassified