Nutrient constraint and yield potential of rice on upland soil in the south of the Dahoumey gap of West Africa

Koné, Brahima; Amadji, Guillaume Lucien; Saïdou, Aliou; Diatta, S.; Akakpo, Cyriaque

doi:10.1080/03650340.2010.489554

Cited by 23 publications

(23 citation statements)

References 6 publications

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“…The terre de barre is an acid soil occupying some extended plateau tertiary sediment along the Gulf of Guinea from Accra to Lagos (Koné et al ., ). They are marked by depressions instead of hydrographic network of other landscapes of crystalline basement described by Diatta & Koné ().…”

Section: Discussionmentioning

confidence: 97%

Soil characteristics and Cyperus spp. occurrence along a toposequence

et al. 2013

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On acrisol (locally named terre de barre in Republic of Benin, West Africa), weed and soil (0-20 cm depth) were sampled at the beginning and the end of the cropping period in 2009 to gain knowledge about interaction between nutsedge occurrence and soil parameters. The samples were taken along a toposequence at the Africa Rice Center experimental station according to the topographic positions of summit, upper slope, middle slope and foot slope. At each topographic position, a 1 m 9 1 m quadrat was set to study Cyperus abundance using 0, 3 and 5 abundance indices scale. Weed species sampled were identified, ovendried and weighed. Soil particle sizes and organic C, total N, available P, K, Ca, Mg and extractable Fe contents were determined. Among the three species of Cyperus that were encountered, C. rotundus was the most frequent along the entire toposequence, while C. esculentus and C. sphacelatus were limited to the summit and upper slope, respectively. Sand, Fe and Pa contents of soil were influencing positively Cyperus spp. occurrence in opposition to C and Mg contents. But only the latest nutrients did so consistently and significantly. Thus, increasing organic matter and applying Mg fertilizer might enhance Cyperus control.

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Section: Discussionmentioning

confidence: 97%

Soil characteristics and Cyperus spp. occurrence along a toposequence

et al. 2013

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“…In soil Nerica4 formed hairs of average length which almost reached the same extension as those grown in nutrient solution, thus indicating that Nerica4 might not have the potential to increase root hair length upon P deficiency. Nerica4 is a very popular variety in Africa but its performance under low soil fertility is poor (Koné et al, 2011). Our data highlights root hair length and density as potential target traits for improvement of P uptake in Nerica4 with varieties like DJ123 or Sadri Tor Misri being possible donors.…”

Section: Discussionmentioning

confidence: 99%

Superior Root Hair Formation Confers Root Efficiency in Some, But Not All, Rice Genotypes upon P Deficiency

Nestler

Wissuwa

2016

Front. Plant Sci.

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Root hairs are a low-cost way to extend root surface area (RSA), water and nutrient acquisition. This study investigated to what extend variation exists for root hair formation in rice in dependence of genotype, phosphorus (P) supply, growth medium, and root type. In general, genotypic variation was found for three root hair properties: root hair length, density, and longevity. In low P nutrient solution more than twofold genotypic difference was detected for root hair length while only onefold variation was found in low P soil. These differences were mostly due to the ability of some genotypes to increase root hair length in response to P deficiency. In addition, we were able to show that a higher proportion of root hairs remain viable even in mature, field-grown plants under low P conditions. All investigated root hair parameters exhibited high correlations across root types which were always higher in the low P conditions compared to the high P controls. Therefore we hypothesize that a low P response leads to a systemic signal in the entire root system. The genotype DJ123 consistently had the longest root hairs under low P conditions and we estimated that, across the field-grown root system, root hairs increased the total RSA by 31% in this genotype. This would explain why DJ123 is considered to be very root efficient in P uptake and suggests that DJ123 should be utilized as a donor in breeding for enhanced P uptake. Surprisingly, another root and P efficient genotype seemed not to rely on root hair growth upon P deficiency and therefore must contain different methods of low P adaptation. Genotypic ranking of root hair properties did change substantially with growth condition highlighting the need to phenotype plants in soil-based conditions or at least to validate results obtained in solution-based growth conditions.

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“…Except for soil C (1.09-1.71%) and N (0.05-0.08%) concentrations and K (0.1 cmol kg −1 ) concentrations at certain levels of significance, the studied soil had high nutrient concentrations, especially for P (8-26.4 ppm) and Na that reached 0.55 cmol kg −1 (Table 1). But rice yield can drop to 0.26 tha −1 even for improved varieties with a potential yield of 4-5 tha −1 , as a consequence of mineral imbalances, particularly C : N, Ca : Mg and K : Mg [23]. Regarding yield reduction as an indicator of agricultural soil degradation [32], we deduce that unbalanced soil nutrients in the studied area are likely to contribute.…”

Section: Indicators Of Soil Degradation In the Environmentmentioning

confidence: 99%

“…Therefore, the studied location in the Dahomey gap differs from the ecologies of north and south guinea savanna of West Africa. Indeed, the studied zone was described as a costal savanna [22] representing a marginal zone of West Africa, which was named the Dahomey gap [23]. Therefore, this particularity could have induced differences in weed assemblages compared to the others savanna ecologies.…”

Section: Extension and Limit Of Our Finding Cyperus Esculentusmentioning

confidence: 99%

A Case ofCyperusspp. andImperata cylindricaOccurrences on Acrisol of the Dahomey Gap in South Benin as Affected by Soil Characteristics: A Strategy for Soil and Weed Management

Koné

Amadji

Touré

et al. 2013

Applied and Environmental Soil Science

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Because of the limiting efficacy of common weed control methods on Cyperus spp. and Imperata cylindrica their occurrences in tropical agroecologies and the effect of soil properties in suppressing these species were investigated in south Benin (Cotonou), a typical ecology of the Dahomey gap. Weeds and soil samples were collected twice early and later in the rainy season in 2009 at four topographic positions (summit, upper slope, middle slope, and foot slope). Sampling was done according to Braun-Blanquet abundance indices (3 and 5) and the absence (0) of Cyperus and Imperata in a quadrat, respectively. The relationship between their respective abundances and soil parameters (texture, C, N, P, K, Na, Ca, Mg, and Fe) was explored. Weed occurrence was less related to soil texture, and Imperata growth was more influenced by soil nutrients (K, Ca, and Fe) than Cyperus spp. Soil cation ratios of K : Mg and Ca : Mg were the main factors that could be changed by applying K and/or Mg fertilizers to reduce Cyperus and/or Imperata occurrence. Maintaining high Fe concentration in soil at hillside positions can also reduce Imperata abundance, especially in the Dahomey gap.

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Nutrient constraint and yield potential of rice on upland soil in the south of the Dahoumey gap of West Africa

Cited by 23 publications

References 6 publications

Soil characteristics and Cyperus spp. occurrence along a toposequence

Soil characteristics and Cyperus spp. occurrence along a toposequence

Superior Root Hair Formation Confers Root Efficiency in Some, But Not All, Rice Genotypes upon P Deficiency

A Case ofCyperusspp. andImperata cylindricaOccurrences on Acrisol of the Dahomey Gap in South Benin as Affected by Soil Characteristics: A Strategy for Soil and Weed Management

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