Rooting Characteristics of Corn, Soybeans and Barley as a Function of Available Water and Soil Physical Characteristics

Dwyer, L. M.; Stewart, Donald C.; Balchin, D.

doi:10.4141/cjss88-011

Cited by 76 publications

(42 citation statements)

References 7 publications

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“…Hund et al, (2009) observed greater rooting depth in the drought tolerant tropical maize inbred lines than the sensitive lines. An inverse relationship between rooting depth and available soil water was reported in maize under field conditions (Dwyer et al, 1988). Earlier Ogawa et al, (2005) also reported declined root length and roots density in maize in water deficit environment.…”

Section: Root Traits Under Greenhouse Conditionsmentioning

confidence: 99%

Screening of Maize Genotypes for Drought Tolerance Related Trait Variability

Dar¹,

Sofi²,

Dar³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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Section: Root Traits Under Greenhouse Conditionsmentioning

confidence: 99%

Screening of Maize Genotypes for Drought Tolerance Related Trait Variability

Dar¹,

Sofi²,

Dar³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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“…Drought stress is the largest single factor limiting crop productivity globally (Pennisi, 2008), and is influenced by tillage because of its impact on rooting depth and root density distribution (Dwyer et al, 1988;Barber & Kovar, 1991). The distribution of water within the soil profile, an important determinant of corn root distribution, is also affected by tillage (Lahai & Ekanayake, 2009).…”

mentioning

confidence: 99%

Tillage Effects on Corn Soil-plant-water Continuum in Alfisols of Southern Ohio

Kahlon¹,

Fausey²,

Lal³

2012

JAS

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Tillage alters soil physical properties and impacts soil water regime, crop's relative water content (RWC), and root distribution. Thus, a field study was conducted to characterize and correlate root distribution and assess RWC of corn (Zea mays L.) with soil physical properties under two tillage systems i.e. no-till (NT), and conventional tillage (CT). The RWC, determined four times during a course of the day at two growth stages (V8, i.e. 60 days after planting; and R2, i.e. 90 days after planting), was significantly different (P < 0.05) among two tillage treatments. Corn grown under NT had significantly higher RWC than that under CT during both growth stages. At the V8 growth stage, the RWC ranged from 73.2 to 95.4 % under NT compared with 60.9 to 89.6 % under CT. Further, during the afternoon measurements, RWC was 15 % higher under NT than CT. A similar trend was observed during the R2 growth stage but with lesser RWC values probably due to the lower soil water content at that time. Higher root mass density (RMD) i.e. 0.50 Mg m -3 was measured in 0-10 cm depth under NT than under CT (0.34 Mg m -3 ), and the opposite was true for 10-20 cm depth. Due to the presence of a compacted layer (plow pan) in CT, roots were concentrated mostly in 10-20 cm depth. Further, higher RMD was measured along the row than within row.Keywords: relative water content, corn root distribution, soil water content, moisture stress, no till, conventional tillage Abbreviations CT = conventional tillage; NT = no-till; PR = penetration resistance of soil; RMD = root mass density; RWC = relative water content of leaves.

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“…In spite of these drawbacks the combination of O 2 contents and TDR water contents have provided some added insight on earlier root growth analyses. Dwyer et al (1988Dwyer et al ( , 1996 investigated root growth and development, and observed a sharp drop in rooting activity at depths in the 20-to 40-cm range. In addition, they showed that root growth was slowed at profile soil water contents at or above field capacity (Dwyer et al 1988).…”

Section: Discussionmentioning

confidence: 99%

Oxygen measurements in the root zone facilitated by TDR

Topp¹,

Dow²,

Edwards³

et al. 2000

Can. J. Soil. Sci.

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. 2000. Oxygen measurements in the root zone facilitated by TDR. Can. J. Soil Sci. 80: 33-41. Deleterious soil structural conditions, as from compaction, can reduce plant growth and yields by reducing aeration and oxygen in the rooting environment. Using a double-membrane oxygen cathode in each of four corn plots, we measured soil oxygen concentrations in duplicate at depths of 5, 10, 20 and 30 cm during the growing season. In addition, temperature, water content and bulk density determinations allowed the monitoring of O 2 concentration trends under no-till and conventional-till corn management. Carbon dioxide flux from the soil surface was measured weekly. Temporal patterns of O 2 levels fluctuated in response to rainfall at all depths but much less so at 30-cm depth. At 30 cm the O 2 concentration remained inadequate for optimum plant growth (<0.01 kg m -3 ) for over 2 mo after planting under no-till with poorly timed trafficking. Under conventional till and appropriately timed trafficking adequate aeration occurred more than a month earlier than under no-till. The CO 2 output was generally lower by 10 to 30% in no-till than that in conventional till, indicating measurably lower levels of biological activity. The relative magnitudes of mid-season O 2 concentrations and CO 2 flux densities showed the same pattern as the crop yields for all tillage treatments. More analyses of seasonal O 2 consumption patterns are required to determine if lack of O 2 is a causal factor for the reduced crop yield.Key words: TDR, aeration, oxygen measurement, carbon dioxide, tillage, root zone Topp, G. C., Dow, B., Edwards, M., Grwegorich, E. G., Curnoe, W. E. et Cook, F. J. 2000. Utilisation de la RDT dans les mesures des concentrations d'oxygène dans la zone racinaire. Can. J. Soil Sci. 80: 33-41. Les mauvaises conditions structurales du sol, comme celles qui résultent de la compaction, peuvent réduire la croissance et le rendement des cultures en diminuant l'aération ainsi que la teneur en oxygène de la rhizosphère. Au moyen d'une cathode pour oxygène à double membrane installée dans chacune de quatre parcelles de maïs, nous avons mesuré en double, durant la saison de végétation, les concentrations de O 2 dans le sol aux profondeurs de 5, 10, 20 et 30 cm. En outre, les mesures de la température de la teneur en eau et de la densité apparente permettaient de suivre l'évolution des concentrations d'oxygène en régime de culture sans travail du sol et en régime de travail classique du sol. Les flux de bioxyde de carbone émanant de la surface du sol étaient mesurés une fois chaque semaine. L'évolution dans le temps des niveaux de O 2 fluctuait selon la pluviométrie pour toutes les profondeurs, encore que beaucoup moins à la profondeur de 30 cm. À cette profondeur, la concentration de O 2 demeurait insuffisante pour assurer la croissance végétale optimale (<0,01 kg m -3 ) pour plus de deux mois après le semis en régime de semis direct, lorsque les passages des machines étaient faits à contretemps. En régime de travail classique du so...

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Rooting Characteristics of Corn, Soybeans and Barley as a Function of Available Water and Soil Physical Characteristics

Abstract: Blocks were removed at 0.15-m depth increments until no further roots were observed. All roots were identified by eye, hand picked from the soil, stained with Congo red (Ward et al. 1978) and their length estimated using the grid technique tested by Tennant (1975

Cited by 76 publications

References 7 publications

Screening of Maize Genotypes for Drought Tolerance Related Trait Variability

Screening of Maize Genotypes for Drought Tolerance Related Trait Variability

Tillage Effects on Corn Soil-plant-water Continuum in Alfisols of Southern Ohio

Oxygen measurements in the root zone facilitated by TDR

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