Can hydraulic redistribution put bread on our table?

Burgess, Stephen S. O.

doi:10.1007/s11104-010-0638-1

Cited by 41 publications

(30 citation statements)

References 26 publications

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“…This has been extensively studied for N nutrition in intercropping or agroforestry systems, which are mixing at least one non-legume species with a N 2 -fixing legume species. Hydraulic redistribution is another process likely to influence nutrient uptake of neighbouring plants, with deep-rooted plants transferring water up from depth into topsoil layers (Burgess 2011). Facilitation has been little studied so far for P, and recently reviewed by Hinsinger et al (2011).…”

Section: Plant-plant Belowground Interactions In the Rhizosphere Of Pmentioning

confidence: 99%

Acquisition of phosphorus and other poorly mobile nutrients by roots. Where do plant nutrition models fail?

et al. 2011

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Background In the context of increasing global food demand, ecological intensification of agroecosystems is required to increase nutrient use efficiency in plants while decreasing fertilizer inputs. Better exploration and exploitation of soil resources is a major issue for phosphorus, given that rock phosphate ores are finite resources, which are going to be exhausted in decades from now on. Scope We review the processes governing the acquisition by plants of poorly mobile nutrients in soils, with a particular focus on processes at the root-soil interface. Rhizosphere processes are poorly accounted for in most plant nutrition models. This lack largely explains why present-day models fail at predicting the actual uptake of poorly mobile nutrients such as phosphorus under low input conditions. A first section is dedicated to biophysical processes and the spatial/temporal development of the rhizosphere. A second section concentrates on biochemical/biogeochemical processes, while a third section addresses biological/ecological processes operating in the rhizosphere. Conclusions New routes for improving soil nutrient efficiency are addressed, with a particular focus on breeding and ecological engineering options. Better mimicking natural ecosystems and exploiting plant diversity appears as an appealing way forward, on this long and winding road towards ecological intensification of agroecosystems. (Résumé d'auteur

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Section: Plant-plant Belowground Interactions In the Rhizosphere Of Pmentioning

confidence: 99%

Acquisition of phosphorus and other poorly mobile nutrients by roots. Where do plant nutrition models fail?

et al. 2011

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“…Increased ABA concentration induced an increase in soluble solids content in the tomatoes (Savi et al, 2009). Third, the water absorbed from the lower part of the root was released to the dried upper part by hydraulic lift (Caldwell et al, 1998;Liste and White, 2008;Burgess, 2010;Sekiya et al, 2010). Soil water content in the dried upper part increased slightly at midday (Fig.…”

Section: Discussionmentioning

confidence: 99%

Cultivation Methods for Tomato (Lycopersicon esculentum Mill.) with High Soluble Solids Content Using the Vertically Split Root System

Hayashi¹,

Toyofuku²,

Taguchi³

et al. 2014

Environmental Control in Biology

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“…Para elaboração dos mapas de uniformidade de distribuição de água (UDA), as calhas foram preenchidas com substratos orgânicos (CP no Módulo 1 e FC no Módulo 2) e irrigadas manualmente até a saturação para elevação da condutividade hidráulica, responsável pela redistribuição de água nos meios de cultivo (Burgess, 2011). Após três dias, os substratos foram amostrados em ziguezague a cada 10 cm da superfície até a base da canaleta, em um total de 41 pontos de amostragem ao longo da calha.…”

Section: Methodsunclassified

Altura da lâmina, tempo e volume de enchimento de um equipamento de irrigação por pavio e determinação da uniformidade de distribuição de água em substratos

et al. 2012

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ResumoOs objetivos deste experimento foram realizar a avaliação da altura da lâmina de água, do tempo e volume de enchimento de um equipamento de irrigação por pavio usando calhas autocompensadoras e determinar a uniformidade de distribuição de água (UDA) nesse equipamento utilizando substratos orgânicos comerciais (casca de pinus/CP e fibra de coco/FC). Dois módulos experimentais foram montados em delineamento experimental inteiramente casualizado com cinco repetições. Verificou-se grande variação das medidas de altura da lâmina de água (1,6 a 4,0 cm), mesmo com o equipamento nivelado. O tempo médio de enchimento foi de 6h22min para o Módulo 1 com CP e de 3h45min para o Módulo 2 com FC. O volume de enchimento foi variável, observando-se que as calhas das extremidades (n.° 1 e 5) apresentaram os menores volumes no Módulo 1, e as calhas do início (n.° 1 e 2) no Módulo 2. No Módulo 1, a umidade volumétrica (Ɵ) variou de 42% a 94%, e no Módulo 2, de 24% a 72%, com pontos isolados de secamento e/ou encharcamento. A altura da lâmina de água, o tempo e o volume de enchimento das calhas foram desuniformes nos dois módulos experimentais e nas cinco calhas autocompensadoras, indicando imperfeições no equipamento. A distribuição de água foi variável nos substratos em razão de suas características físico-hídricas e também da altura da lâmina de água nas calhas, apresentando maior umidade e uniformidade de distribuição de água na casca de pinus do que na fibra de coco.Palavras-chave: capilaridade, casca de pinus, fibra de coco, subirrigação. Water depth, filling time and volume of wick irrigation equipment and determination of water distribution uniformity in substrates AbstractThe aims of this study were to evaluate the water depth, filling time and volume in a wick irrigation equipment using auto compensating gutters and to determine the water distribution uniformity (WDU) in these equipments filled with organic commercial substrates (pine bark/PB and coconut coir/CC). We assembled two experimental modules in a completely randomized design with five replications. There was variation in water depth measurements (1.6 to 4.0 cm), even with the equipment leveled. Average filling time was 6h22min for Module 1 with PB and 3h45min for Module 2 with CC. The filling volume was variable, showing that gutters in the extremities (No. 1 and 5) had lower volumes in Module 1 and in the beginning (No. 1 and 2) in Module 2. Volumetric soil moisture (Ɵ) ranged from 42 to 94% in Module 1 and from 24 to 72% in Module 2, with isolated points of desiccation and/or flooding. Water depth, filling time and volume were disuniform in all experimental modules and auto compensating gutters, indicating equipment imperfections. Water distribution was variable in both substrates due to their hydro-physical characteristics and also water depth in the gutters, with higher humidity and water distribution uniformity in pine bark than in coconut coir.

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Can hydraulic redistribution put bread on our table?

Cited by 41 publications

References 26 publications

Acquisition of phosphorus and other poorly mobile nutrients by roots. Where do plant nutrition models fail?

Acquisition of phosphorus and other poorly mobile nutrients by roots. Where do plant nutrition models fail?

Cultivation Methods for Tomato (Lycopersicon esculentum Mill.) with High Soluble Solids Content Using the Vertically Split Root System

Altura da lâmina, tempo e volume de enchimento de um equipamento de irrigação por pavio e determinação da uniformidade de distribuição de água em substratos

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