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Sierra, Jorge; Noël, Cécile; Dufour, Lydie; Ozier‐Lafontaine, Harry; Welcker, Claude; Desfontaines, Lucienne

doi:10.1023/a:1024713127053

Cited by 43 publications

(9 citation statements)

References 24 publications

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“…Regarding the site effect, highly significant differences were observed between the two study sites, for the traits emergence rate and prolificity, where the highest values were obtained in Nkolbisson, suggesting that acidic soils under aluminum toxicity delay the growth of plants in the juvenile state and reduces the production of the number of ears. These results are consistent with data reported in hydroponic solution by some authors (Sierra et al, 2003;Krill et al, 2010;Krstic et al, 2012) who showed that aluminum delays the growth of the primary root and inhibits the formation of lateral roots, limiting the yield by reducing the absorption of water and nutrients in the soil.…”

Section: Chemical and Ecological Aspect Of Soilssupporting

confidence: 93%

Agro-morphological Characterization of Maize (Zea mays L.) Hybrids Under Acid Soils in Two Contrasting Environments

Tekeu¹,

Ngonkeu²,

Tandzi³

et al. 2021

JAS

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Acidic soils cover 75 to 80% of the arable soils in the humid forest areas of Cameroon, causing maize yield losses of around 69%. Sixty-four accessions of maize hybrids were developped from “Line × Tester” crosses between twenty tropical inbred lines with three testers (Cam inbgp117, 88069 and 9450) and between testers themselves, and one acid tolerant open pollinated variety (ATP-SR-Y). Those inbred breeding lines were collected from CIMMYT, IITA and IRAD and the derived single hybrids were characterized using agro-morphological maize’s descriptors on a completely randomized block design in two contrasting environments (Nkoemvone and Nkolbisson). The data collected was subjected to multivariate analyses. The Principal Component Analysis showed the first two components being 73.60% and 78.99% of the total variation in Nkoemvone and Nkolbisson, respectively. Furthermore, grain yield showed a positive and highly significant correlation with the plant emergence rate in Nkoemvone (r = 0.61, P < 0.001) and Nkolbisson (r = 0.84, P < 0.001). Hierarchical Clustering Analysis indicated that these accessions forms four distinct groups, where each of the groups showed clear specific features for which the performance differs from that of the others in Nkoemvone and Nkolbisson. Characters such as plant emergence rate, prolificacy, ear appearance and grain yield have been found as important phenotypic markers for assessing agromorphological diversity of maize hybrids. These traits should necessarily be considered in maize breeding programs for varietal discrimination and formulation of cores collection of maize tolerant to aluminum and manganese toxicities in the soil.

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Section: Chemical and Ecological Aspect Of Soilssupporting

confidence: 93%

Agro-morphological Characterization of Maize (Zea mays L.) Hybrids Under Acid Soils in Two Contrasting Environments

Tekeu¹,

Ngonkeu²,

Tandzi³

et al. 2021

JAS

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“…Higher responsiveness of grain number (41 and 15% in Al-sensitive and Al tolerant wheat lines, respectively) than thousand grain weight (by 5% in both lines) has also been reported by Tang et al (2001). In maize, Sierra et al (2003) found that grain number decreased 32%, while thousand grain weight was less affected (18%) under Al toxicity.…”

Section: Discussionmentioning

confidence: 72%

Grain yield, above-ground and root biomass of Al-tolerant and Al-sensitive wheat cultivars under different soil aluminum concentrations at field conditions

et al. 2008

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Considering the importance of acidic conditions and Al toxicity in arable soils of Chile, 2 field experiments were conducted in the 2005-06 and 2006-07 growing seasons in Valdivia (39°47′18′′S, 73°14′05′′W), Chile in an Andisol. The objective of this experiment was to quantitatively evaluate the effect of different soil exchangeable Al levels on grain yield, and above-ground and root biomass of Altolerant and Al-sensitive wheat cultivars under field conditions. Treatments were a factorial arrangement of: i) two spring wheat cultivars (Al-sensitive, Domo.INIA and Al-tolerant, Dalcahue.INIA) and ii) five exchangeable Al levels (0-2.7 cmol (+) kg −1 ). The experimental design consisted of a randomized complete block design with three replicates. At harvest, grain yield, grain number, thousand grain weight and above-ground biomass were recorded. At the same time, root samples were taken with the pinboard monolith method. Afterwards root biomass, root length density and specific root length were measured. Both above-ground and below-ground traits showed a wide range of values (e.g., between 10 to 2618 g m −2 and between 8 to 117 g m −2 , for above-ground and root biomass, respectively) under the soil Al concentrations used in this study. Al tolerant and Al sensitive cultivars showed different sensitivities to Al toxicity. Interestingly, linear associations were found between grain yield or above-ground biomass and soil Al concentration in Al-sensitive (R 2 =0.95 p<0.001 and R 2 =0.90 p<0.001, respectively) and Al-tolerant (R 2 = 0.91 p<0.001 and R 2 =0.88 p<0.001, respectively) cultivars. Soil Al concentration was found to have a much lower effect on the harvest index. A close, and unique, association was found for both cultivars between grain yield and above-ground biomass (R 2 = 0.98 p<0.001). Root biomass also showed a linear relationship with soil Al concentrations in both Alsensitive (R 2 =0.96 p<0.001) and Al-tolerant (R 2 =0.77 p<0.001) cultivars. Root traits showed good relationships with both grain yield and above-ground biomass.

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“…Leaf area index data reported for tropical America were used from Sierra et al (2003) for maize and from Sinclair et al (2003) for soybean. HYDRUS was run four times, once for each treatment and year.…”

Section: Modelingmentioning

confidence: 99%

Nutrient Leaching in a Colombian Savanna Oxisol Amended with Biochar

et al. 2012

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Nutrient leaching in highly weathered tropical soils often poses a challenge for crop production. We investigated the eff ects of applying 20 t ha −1 biochar (BC) to a Colombian savanna Oxisol on soil hydrology and nutrient leaching in fi eld experiments. Measurements were made over the third and fourth years after a single BC application. Nutrient contents in the soil solution were measured under one maize and one soybean crop each year that were routinely fertilized with mineral fertilizers. Leaching by unsaturated water fl ux was calculated using soil solution sampled with suction cup lysimeters and water fl ux estimates generated by the model HYDRUS 1-D. No signifi cant diff erence (p > 0.05) was observed in surface-saturated hydraulic conductivity or soil water retention curves, resulting in no relevant changes in water percolation after BC additions in the studied soils. However, due to diff erences in soil solution concentrations, leaching of inorganic N, Ca, Mg, and K measured up to a depth of 0.6 m increased (p < 0.05), whereas P leaching decreased, and leaching of all nutrients (except P) at a depth of 1.2 m was signifi cantly reduced with BC application. Changes in leaching at 2.0 m depth with BC additions were about one order of magnitude lower than at other depths, except for P. Biochar applications increased soil solution concentrations and downward movement of nutrients in the root zone and decreased leaching of Ca, Mg, and Sr at 1.2 m, possibly by a combination of retention and crop nutrient uptake.

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Cited by 43 publications

References 24 publications

Agro-morphological Characterization of Maize (Zea mays L.) Hybrids Under Acid Soils in Two Contrasting Environments

Agro-morphological Characterization of Maize (Zea mays L.) Hybrids Under Acid Soils in Two Contrasting Environments

Grain yield, above-ground and root biomass of Al-tolerant and Al-sensitive wheat cultivars under different soil aluminum concentrations at field conditions

Nutrient Leaching in a Colombian Savanna Oxisol Amended with Biochar

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