Eficiência No Uso Da Água E Acúmulo De Matéria Na Batata-Doce Em Função De Lâminas De Irrigação

Delazari, Fábio Teixeira; Ferreira, Mariane Gonçalves; Silva, Gustavo Henrique da; Dariva, Françoise Dalprá; Freitas, Davi Soares de; Nick, Carlos

doi:10.15809/irriga.2017v22n1p115-128

Cited by 4 publications

(6 citation statements)

References 10 publications

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“…Highest estimate of WUE was equal to 64 kg ha -1 mm -1 , relative to the lowest ID, which is 58.9% higher than the WUE of 40 kg ha -1 mm -1 obtained with the highest ID (642 mm) and 44.8% higher than the WUE of 44 kg ha -1 mm -1 obtained with the ID of 567 mm, which guaranteed maximum physical yield of the crop. Such response can be explained by the capacity of the stomata to reduce their conductance to water vapor in response to the water deficit, promoting lower water loss per unit of carbon assimilation, thus improving water use efficiency in stressed plants (Silva et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…Due to the constant occurrence of water deficit in the Northeast region, irrigation is frequently used to cultivate zucchini, a practice that requires adequate management in order to make the most of its potential benefits (Carvalho et al, 2011;Oliveira et al, 2012), avoiding negative effects caused by either water deficit (Delazari et. al., 2017) or water excess (Viana et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Irrigation depths and yield response factor in zucchini cultivation

Azevedo

Fernandes

Vasconcelos

et al. 2018

Rev. bras. eng. agríc. ambient.

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The objective of this study was to evaluate the effect of different irrigation depths on productive performance and yield response of zucchini (Cucurbita pepo L.). A field trial was carried out in the experimental area of the Meteorological Station of the Federal University of Ceará, CE, Brazil. The experimental design was randomized blocks, with six treatments and four replicates. The treatments adopted were: 30, 60, 90, 120, 150 and 180% of the reference evapotranspiration (ETo), estimated by Penman-Monteith (EToPM) and applied by drip irrigation. Fruit weight, number of fruits, fruit length, fruit diameter, pulp thickness, soluble solids and yield were analyzed, as well as water use efficiency (WUE). The methodology proposed by FAO Bulletin 33 was used to calculate the yield response factor (Ky). The 567 mm irrigation depth equivalent to 159% EToPM led to the maximum total crop yield estimated at 24,808 kg ha-1. Highest WUE (64 kg mm-1) was found for the total irrigation depth of 186 mm (30% ETo). Ky values indicated that the crop could be considered as little sensitive (Ky < 1) to water deficit (50, 60, 70, 80 and 90% of the optimal water depth), tending to be proportionally sensitive (Ky = 1) to more severe water deficits (30, 60 and 90% EToPM).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Irrigation depths and yield response factor in zucchini cultivation

Azevedo

Fernandes

Vasconcelos

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…The fresh matter of the aerial part superiority expresses the response of greater water content in the soil, and, therefore, the greater state of water energy in the leaves and turgor of the guard cells, with a positive reflection in biomass production by plants, in general (TAIZ et al, 2017), including sweet potato (DELZARI et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Almeida et al (2015) and Cui et al (2020) concluded that the water deficit inhibits crop photosynthesis, growth and production. This situation expresses the dependence of agricultural production systems on irrigation, in the semiarid world, and requires the adoption of water management strategies in order to obtain sustainable agricultural yields to guarantee food availability, given the growing global concern (SOUZA et al, 2016;DELZARI et al, 2017;EL-FOTOH et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Water stress mitigation by silicon in sweet-potato

Mesquita

Sousa

et al. 2021

RICA

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The objective was to evaluate the effect of the reduction in the irrigation blades under silicate fertilization via soil on growth, branch emission, production of fresh phytomass of aerial part, yield of marketable tuberous roots, and agricultural water use efficiency by plants of the sweet-potato variety Campina, with purple skin. The treatments were arranged in subdivided plots, distributed into randomized blocks, using a 2x5 factorial scheme with three repetitions, totaling 30 experimental units. The plots were two irrigation blades of 100 and 50% of the crop evapotranspiration â€“ (ETc) and the subplots corresponded to the silicon doses of 0.0, 0.5, 1.0, 1.5, and 2.0 g plant-1. At the end of the experiment, the following variables were evaluated: stem diameter, branch emission, fresh phytomass of aerial part, phytomass of marketable tuberous roots, yield, and water use efficiency by plants. According to the results, the reduction from 100 to 50% of the ETc caused inhibition of growth, production of fresh phytomass of aerial part, and yield of marketable tuberous roots. The crop revealed to be more sensitive to water stress regarding yield than regarding growth or biomass formation by the aerial part and marketable tuberous roots.

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“…Em geral, as hortaliças têm seu desenvolvimento bastante influenciado pelas condições de água do solo, onde a deficiência hídrica é, normalmente, o fator mais limitante à obtenção de produtividades elevadas e produtos de boa qualidade, entretanto o excesso é considerado prejudicial (SANTANA et al, 2016). Assim, a irrigação surge como uma importante técnica para a obtenção de maiores níveis de produção das culturas agrícolas (DELAZARI et al, 2017).…”

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Resposta De Cultivares De Alface Sob Diferentes Lâminas De Irrigação E Doses De Nitrogênio

Santana¹,

Nascimento²,

Silva³

et al. 2019

Enci Bio

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RESUMO A alface (Lactuca sativa L.) é uma das hortaliças mais cultivadas e consumidas em todo país. O fornecimento de água se torna importante pelo fato de estar diretamente ligada a germinação, respiração, crescimento, desenvolvimento do caule, folhas e frutos entre outros. O nitrogênio é o nutriente mais importante no desenvolvimento do alface, o excesso ou falta desse nutriente pode ocasionar uma grande queda na produtividade e problemas de qualidade nutritiva. Este trabalho teve como objetivo determinar qual porcentagem da evapotranspiração e dose de nitrogênio que proporcionam a maior produção, sem comprometer a qualidade da alface. Os níveis de evapotranspiração avaliados foram 25%, 50%, 75%, 100%e 125% da ETo. Os níveis do fator doses de adubo nitrogenado avaliados foram 0, 50, 75, 100 e 125 kg.ha-¹, respectivamente de ureia. Foi utilizado o delineamento em blocos ao acaso composto por cinco tratamentos, quatro blocos e 4 repetições. As variáveis analisadas foram: Altura da planta (h), diâmetro do colo (DC); número de folha (NF), peso da parte aérea fresca (PPAF); peso da parte aérea seca (PPAS); peso da raiz fresca (PRF) e peso da raiz seca (PRS). Contudo, a lâmina equivalente 100% e 125% da evapotranspiração e a dose equivalente a 125 kg.ha-¹ de ureia, proporcionaram maiores desenvolvimentos para a maioria das variáveis analisadas. PALAVRAS-CHAVE: água, hortaliças, nutriente, produção RESPONSE OF LETTUCE CULTIVARS UNDER DIFFERENT IRRIGATION BLADES AND NITROGEN DOSES ABSTRACT Lettuce (Lactuca sativa L.) is one of the most cultivated and consumed vegetables in the whole country. The water supply becomes important because it is directly linked to germination, respiration, growth, development of the stem, leaves and fruits among others. Nitrogen is the most important nutrient in the development of lettuce,

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Eficiência No Uso Da Água E Acúmulo De Matéria Na Batata-Doce Em Função De Lâminas De Irrigação

Abstract: Among the biological processes that affect the productivity of sweet potatoes, the water deficit stands out, and irrigation becomes an important technique to obtain higher agricultural yields.With the limited availability of water for agriculture and high energy costs, it is necessary to

Cited by 4 publications

References 10 publications

Irrigation depths and yield response factor in zucchini cultivation

Irrigation depths and yield response factor in zucchini cultivation

Water stress mitigation by silicon in sweet-potato

Resposta De Cultivares De Alface Sob Diferentes Lâminas De Irrigação E Doses De Nitrogênio

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