Corn root distribution between ammonium fertilized and unfertilized soil

Zhang, Jiancai; Barber, S. A.

doi:10.1080/00103629309368811

Cited by 15 publications

(7 citation statements)

References 8 publications

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“…This phenomenon has been repeatedly shown both in controlled environment and in the field for many major crop species [e.g. sorghum‐sudangrass (Pothuluri et al 1986), winter wheat (Newman and Andrews 1973), corn (Zhang and Barber 1993) and cotton (Brouder and Cassman 1994b)]. As summarized in several reports (Lynch and St Clair 2004, Pendall et al 2004), a few studies have suggested that root architecture may respond to elevated CO 2 .…”

Section: Influence Of Climate Change On Nutrient Availability and Acqmentioning

confidence: 81%

Impact of climate change on crop nutrient and water use efficiencies

Brouder

Volenec

2008

Physiologia Plantarum

128

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Implicit in discussions of plant nutrition and climate change is the assumption that we know what to do relative to nutrient management here and now but that these strategies might not apply in a changed climate. We review existing knowledge on interactive influences of atmospheric carbon dioxide concentration, temperature and soil moisture on plant growth, development and yield as well as on plant water use efficiency (WUE) and physiological and uptake efficiencies of soil-immobile nutrients. Elevated atmospheric CO(2) will increase leaf and canopy photosynthesis, especially in C3 plants, with minor changes in dark respiration. Additional CO(2) will increase biomass without marked alteration in dry matter partitioning, reduce transpiration of most plants and improve WUE. However, spatiotemporal variation in these attributes will impact agronomic performance and crop water use in a site-specific manner. Nutrient acquisition is closely associated with overall biomass and strongly influenced by root surface area. When climate change alters soil factors to restrict root growth, nutrient stress will occur. Plant size may also change but nutrient concentration will remain relatively unchanged; therefore, nutrient removal will scale with growth. Changes in regional nutrient requirements will be most remarkable where we alter cropping systems to accommodate shifts in ecozones or alter farming systems to capture new uses from existing systems. For regions and systems where we currently do an adequate job managing nutrients, we stand a good chance of continued optimization under a changed climate. If we can and should do better, climate change will not help us.

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Section: Influence Of Climate Change On Nutrient Availability and Acqmentioning

confidence: 81%

Impact of climate change on crop nutrient and water use efficiencies

Brouder

Volenec

2008

Physiologia Plantarum

128

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“…According to Mengel and Barber (1974), it can be assumed that axile root elongation stops thereafter. This hypothesis is supported by results obtained with localized nutrient supply which showed that root growth is generally higher in the enriched soil zone (Drew, 1975;Sattelmacher and Thorns, 1991;Zhang and Barber, 1993). Several explanations can be proposed to account for this decrease in elongation rate: (i) Carbohydrate supply to the root decreased as the distance from aerial parts to root tip increased.…”

Section: Discussionmentioning

confidence: 55%

Evaluation of parameters describing the root system architecture of field grown maize plants (Zea mays L.)

Pellerin

Pagès

1994

Plant Soil

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“…Rosalie and Uplands soils. In contrast, Zhang and Barber (1993) found that maize root density increased with concentration of NH4-N in fertilizer zones.…”

mentioning

confidence: 41%

The toxicity of banded urea to corn growth and yield as influenced by triple superphosphate

Fan¹,

MacKenzie²

1995

Can. J. Soil. Sci.

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r6alis6e sui argile Ste-Rosalie, sur loarnSt-Bernard @runisol eutrique) et sur loam argilo-sableux Chicot. Dans l'6tude en chambre de croissance, I'ur6e localis6e en,bande relevait le pH du solit7,2-1,5 jusqu'ir 4 cm de distance de la bande et les concentrations de NH3 pouvaient atteindre 2,1 mM ir 2 cm de la bande au bout de 20 jours. Le pH 6lev6 et les concentrations de NH3 r6sultant de I'hydrolyse de I'ur6e inhibaient la croissance des racines et des parties vertes des plantules. La localisation du SPT dans Ia bande avec I'ur6e diminuait les accroissements de pH r6sultant de I'hydrolyse de I'ur6e et abaissait les concentrations de NHr. En outre, elle accroissait le poids des racines. Dans I'exp6rience au champ, l'6pandage de I'ur6e ir des doses de plus de'10 kg N par ha diminuait la densitd de peuplem'dnt, ainsi que le poids sec des plantules dans les premiers stades de croissance. La localisation du SPT dans la bandeivei I'ur6e accroissait la croissance au d6part dans tous les sols. Les doses maximales d'ur6e compatibles avec I'accroissement du rendement du mais pourraient €tre relev6es de 40 d 80 kg Na par ha, si elles sont plac6es dans la bande avec du superphosphate triple.

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Corn root distribution between ammonium fertilized and unfertilized soil

Cited by 15 publications

References 8 publications

Impact of climate change on crop nutrient and water use efficiencies

Impact of climate change on crop nutrient and water use efficiencies

Evaluation of parameters describing the root system architecture of field grown maize plants (Zea mays L.)

The toxicity of banded urea to corn growth and yield as influenced by triple superphosphate

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