Response of upland rice to phosphorus in an Ultisol in the humid forest zone of West Africa

Sahrawat, K. L.; Jones, M. P.; Diatta, S.

doi:10.1007/bf00749515

Cited by 44 publications

(44 citation statements)

References 4 publications

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“…Chemical fertilizer was applied at a rate of 100 kg N ha −1 , 100 kg P ha −1 , and 100 kg K ha −1 in the form of a compound fertilizer split twice; first as a basal application at 14 DAT, and then as a top dressing at 50 DAT. This fertilizer application rate was determined to be appropriate for this study based on the results of field studies examining the growth of upland rice in response to nitrogen (Jones et al, 1997), phosphorus (Sahrawat et al, 1995), and potassium (Fageria et al, 1990). Preventive measures were taken to preclude damage from disease and insects.…”

Section: Experiments 1 Evaluation Of Plasticity In Deep Root Developmentmentioning

confidence: 99%

Drought-induced root plasticity of two upland NERICA varieties under conditions with contrasting soil depth characteristics

Menge

Kameoka

Kano‐Nakata

et al. 2016

Plant Production Science

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To identify differences in root plasticity patterns of two upland New Rice for Africa (NERICA) varieties, NERICA 1 and 4, in response to drought under conditions with contrasting soil profile characteristics, soil moisture gradients were imposed using a sloping bed system with depths ranging 30-65 cm and a line-source sprinkler system with a uniformly shallow soil layer of 20 cm depth. Varietal differences in shoot and root growths were identified only under moderate drought conditions, 11-18% v/v soil moisture content. Further, under moderate drought soil conditions where roots could penetrate into the deep soil layer, deep root development was greater in NERICA 4 than in NERICA 1, which contributed to maintaining dry matter production. However, under soil conditions with underground impediment to deep root development, higher shoot dry weight was noted for NERICA 1 than for NERICA 4 at 11-18% v/v soil moisture content, which was attributed to increased lateral root development in the shallow soil layer in NERICA 1. Enhanced lateral root development in the 0-20-cm soil layer was identified in NERICA 1 even under soil conditions without an impediment to deep root development; however, this did not contribute to maintaining dry matter production in upland rice. Thus, we show different root developmental traits associated with drought avoidance in the two NERICA varieties, and that desirable root traits for upland rice cultivation vary depending on the target soil environment, such as the distribution of soil moisture and root penetration resistance.

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Section: Experiments 1 Evaluation Of Plasticity In Deep Root Developmentmentioning

confidence: 99%

Drought-induced root plasticity of two upland NERICA varieties under conditions with contrasting soil depth characteristics

Menge

Kameoka

Kano‐Nakata

et al. 2016

Plant Production Science

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“…La riziculture pluviale en Afrique de l'Ouest souffre de l'acidite´des sols en de´pit des travaux re´alise´s sur la fertilisation en P (Sahrawat et al 1995 ;Somado et al 2003). Ainsi, les rendements de´passent rarement 1,5 t ha…”

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Réponses des variétés interspécifiques du riz de plateau aux applications de phosphate en zone de forêt au Nigeria

Koné¹,

Diatta²,

Saïdou³

et al. 2009

Can. J. Soil. Sci.

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Pour améliorer la production du riz sur les sols acides en zone de forêt humide de l’Afrique de l’Ouest et approfondir la connaissance de la nutrition en phosphore (P) des variétés interspécifiques du riz de plateau, le potentiel de production de certaines variétés a été évalué à l’application du phosphate sur un hyperdystric ferralsol à Ikwo au Nigeria. Cinq variétés de riz dont un sativa (V1 = WAB 56 - 104) et quatre interspécifiques (V2 = WAB450-1-B-P-38-HB, V3 = WAB450-11-1-P-40-HB, V4 = WAB450-11-1-P-P-40-1-H et V5 = WAB450-24-3-2-P-18-HB) ont été semées dans un dispositif de blocs complets randomisés à trois répétitions. Le phosphore a été appliqué annuellement à 50, 100 et 150 kg P ha-1 sous forme de triple super phosphate-TSP durant trois ans, ou en application unique du phosphate naturel du Mali (Ma) aux doses proportionnelles (150, 300 et 450 kg P ha-1) à la première année de l’étude. Les rendements en grain (1,6-3,7 t ha-1), les efficacités agronomiques (2-40 kg kg-1) et les efficiences agronomiques relatives (5-53 %) ont révélé des différences significatives (P <0,05) entre les interspécifiques selon leurs besoins en P et la meilleure productivité de certains (V3 et V4) d’entre eux sur sol acide par rapport à V1. L’usage combiné de ces variétés et de 30 kg P ha-1 an-1 (Ma) ou 45 kg P ha-1 an-1 (TSP) ont été recommandés pour l’obtention de hauts rendements du riz. Le maintient d’un bon équilibre des rapports des cations (Ca : Mg et K : Mg) dans le sol a été jugé nécessaire pour améliorer la réponse du riz à la fertilisation phosphatée pour une production rizicole durable sur les hyperdystric ferralsols.Mots clés : Afrique de l’Ouest, interspécifiques, riziculture pluviale, hyperdystric ferralsol, phosphate

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“…The model results in 7 over 8 treatments were not significantly different from the observed yield of NERICA. The P stress has been simulated adequately to allow the expression of nitrogen stress among the treatments with application and without application of P. By simulating adequately the processes in P deficient soils, the model agrees with the results of Sahrawat et al (1995) suggesting that P fertilization of acid-tolerant upland rice can significantly improve its productivity under Ultisols. Before the calibration and over all five sites, grain yield and total aboveground plant biomass had a RMSE of more than 30% (Table 6).…”

Section: Model Sensitivity For Soil Parametermentioning

confidence: 55%

Sensitive parameters for EPIC model evaluation and validity under soil water and nutrients limited conditions with NERICA cropping in West Africa

Worou¹,

Gaiser²,

Oikeh³

2015

Afr. J. Agric. Res.

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Crop models known to be based on the theory of crop physiology for describing the dynamic process of crop growth are recently explored for their uncertainties in model application under resource limited conditions. The aim of this study was to test Environmental Policy Integrated Climate (EPIC), on upland land rice production by taking into account seasonal variability in Guinean and Guinean-Sudanian zones in Benin and Nigeria (West Africa). A range of data available under farmer or experimental conditions in rainfed agriculture were measured or used from literature. The results show the accuracy of the model to simulate LAI, total above ground biomass and grain yield of upland rice for 2 NERICA rice cultivars. After calibration, the model showed average mean relative error between 0.06 and 0.15 with the model efficiency up to 0.98% in the case of LAI. The assessment of the model performances about sensitivity to N or P fertilizer application is also discussed under Ultisols. Large root mean square (RMSE) in calibration and the validation (>100) process suggested that robustness of the model became restrictive under severe environmental conditions such as in drought or flooding condition. Performance of the model at large scale should be executed of with land marginality classification.

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Response of upland rice to phosphorus in an Ultisol in the humid forest zone of West Africa

Cited by 44 publications

References 4 publications

Drought-induced root plasticity of two upland NERICA varieties under conditions with contrasting soil depth characteristics

Drought-induced root plasticity of two upland NERICA varieties under conditions with contrasting soil depth characteristics

Réponses des variétés interspécifiques du riz de plateau aux applications de phosphate en zone de forêt au Nigeria

Sensitive parameters for EPIC model evaluation and validity under soil water and nutrients limited conditions with NERICA cropping in West Africa

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