Limite crítico no solo para transpiração e crescimento foliar em mandioca em dois períodos com deficiência hídrica

Pinheiro, Diego Garrido; Streck, Nereu Augusto; Richter, Gean Leonardo; Langner, Josana Andréia; Winck, José Eduardo Minussi; Uhlmann, Lilian Osmari; Zanon, Alencar Júnior

doi:10.1590/s0100-06832014000600009

Cited by 8 publications

(5 citation statements)

References 16 publications

(26 reference statements)

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“…Water-deficient plants subjected to high temperatures use stomatal closure control to increase soil water use efficiency. This and other studies make clear that phytotechnical variables related to plant growth generally correlate with transpiration (PINHEIRO et al, 2014;OULEDALI et al, 2018).…”

Section: Resultssupporting

confidence: 61%

Ecophysiology, quality, and mycorrhizal dependency in Musa spp. (cv. Grand naine) seedlings

et al. 2021

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The use of alternative technologies involving biological processes, with economic and ecological gains, is desirable for both the expansion of Musa spp. farming and the renovation of areas with low yields. Arbuscular mycorrhizal fungi (AMF) can stimulate plant growth, especially by increasing the absorption of phosphorus (P) and other nutrients. This study analyzes the influence of AMF on the growth and physiology of micropropagated Musaspp. plants submitted to doses of P. The experimental design was randomized blocks, in a 5 x 5 factorial arrangement, in which the factors were inoculation with AMF (Glomus clarum, Gigaspora margarita, , Gigaspora albida,Clareoideoglomus etunicatum, and the control without AMF) and five doses of P (0, 50, 100, 200, and 400 mg kg-1), with four replicates. The application of P doses increased growth in micropropagated Musaspp. seedlings, regardless of mycorrhizal inoculation. The highest rates of mycorrhizal colonization occurred at the lowest P doses, and the dose of 50 mg kg-1 P provided better conditions for mycorrhizal formation in all AMF species under study. The symbioses with AMF, as well as the use of P, increased photosynthesis rate, thus favoring the growth, development, and quality of Musa spp. seedlings. Species G. clarum, C. etunicatum, and G. margarita were the most promising for plant growth.

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Section: Resultssupporting

confidence: 61%

Ecophysiology, quality, and mycorrhizal dependency in Musa spp. (cv. Grand naine) seedlings

et al. 2021

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“…A study on the critical limits of soil moisture for the cassava crop showed that water stress significantly reduces the total leaf area of cassava plants due to lower diffusion of CO 2 by the stomata, which remain closed for a longer period (Pinheiro et al, 2014). In contrast, greater soil water availability favours plant development and increases the area for interception of solar radiation for photosynthesis and production of photoassimilates that are used for starch accumulation in the roots (Tironi et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Effect of Harvest Time and Nitrogen Doses on Cassava Root Yield and Quality

Oliveira

Uchôa

Alves

et al. 2017

Rev. Bras. Ciênc. Solo

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ABSTRACT:Nitrogen is considered the most limiting nutrient for cassava, and N availability can influence the crop cycle, including earlier harvest. The aim of this study was to study the effect of harvest time on the production components of cassava, "Aciolina" cultivar, at different rates of N fertiliser. The experiment was carried out in an area newly incorporated into the productive system in a savannah ecosystem in the northern Amazon. A randomised block experimental design was used in a split plot arrangement with four replications. The N rates (0, 30, 60, 150, and 330 kg ha -1 ) were allocated to the main plots, and the harvest times (90, 120, 150, 180, 240, 300, and 360 days after emergence of the stalks -DAE) were allocated to the subplots. Plant height, shoot fresh matter yield, number of roots per plant, average root diameter, and root fresh matter yield display an increasing linear response up to 360 DAE in cassava cv. "Aciolina". For all harvest times, the N rates promote an increase in root fresh matter yield. At 300 and 360 DAE, the root fresh matter and starch yield and the harvest index show a quadratic response as a function of the N level. The greatest efficiency of N topdressing on the production of root fresh matter occurs at 300 DAE, promoting an earlier harvest. At that time, the dose of maximum technical efficiency, 226 kg ha -1 N, results in a yield of 62 Mg ha -1 of root fresh matter, 13 Mg ha -1 of starch, and a harvest index of 81 %.

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“…The plants that received irrigation levels of 73.09 mm had about two times more leaves than plants that received only 42.15 mm. Pinheiro et al (2014) found that total leaf area was lower in plants with water deficiency mainly due to a reduction in development of new leaves and an increase in senescence. Above the irrigation level of 73.09 mm there was no significant increase in the number of leaves, and above 104.3 mm a tendency towards reduction was observed.…”

Section: Resultsmentioning

confidence: 99%

“…As plantas que receberam 73,09 mm emitiram cerca de duas vezes mais folhas do que as plantas que receberam 42,15 mm. Em trabalho desenvolvido por Pinheiro et al (2014), a área foliar total foi inferior nas plantas com deficiência hídrica devido principalmente à redução da emissão de novas folhas e ao aumento da senescência. Acima da lâmina de 73,09 mm não houve incremento significativo, além disso, a partir da lâmina de 104,3 mm, observou-se uma tendência de redução.…”

Section: Resultsunclassified

Initial growth of cassava plants cv. Mossoró under different water regimes

Neto

Coelho

Andrade

et al. 2018

AGRO@MBIENTE ON-LINE

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The sprouting phase of cassava is critical for the establishment of the plant, with this phase being dependent on soil moisture. As such, this study evaluated the effect of different irrigation levels on the initial growth of cassava cv. Mossoró in semi-arid conditions. The experiment was conducted under completely randomized design conditions with 5 replications. The treatments in pots containing one plant per experimental unit consisted of 5 irrigation levels, 0, 25, 50, 75 and 100% of the reference evapotranspiration (ETo, mm day-1), which corresponded to totals for the experimental period of 11.20; 42.15; 73.09; 104.03 and 134.97 mm, respectively. At 30 days after planting, the number of leaves and stems, as well as the dry mass of the shoot and the root had increased sharply for irrigation levels up to 73.09 mm. For higher irrigation levels there was a tendency for plant growth stabilization; however, above 104.03 mm there was a decrease. Shoot and root dry mass ratio showed severe water stress at the 11.20 mm level, being more damaging to root growth. Plant height showed a positive linear trend as the level of irrigation was increased, as opposed to water use efficiency. Therefore, irrigation with 50% replacement of ETo (73.09 mm) provided the best conditions for early growth of cassava.

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Limite crítico no solo para transpiração e crescimento foliar em mandioca em dois períodos com deficiência hídrica

Cited by 8 publications

References 16 publications

Ecophysiology, quality, and mycorrhizal dependency in Musa spp. (cv. Grand naine) seedlings

Ecophysiology, quality, and mycorrhizal dependency in Musa spp. (cv. Grand naine) seedlings

Effect of Harvest Time and Nitrogen Doses on Cassava Root Yield and Quality

Initial growth of cassava plants cv. Mossoró under different water regimes

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