Yield response and availability of various phosphate fertilizer types as estimated by EUF

Judel, G. K.; Gebauer, Wolfgang; Mengel, K.

doi:10.1007/bf02182720

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…The electro-ultrafiltration technique has been successfully used, especially in Europe and Asia, to predict the short-and long-term nutrient availability from soils (Nemeth 1979) and fertilizers (Judel et al 1985;Steffens 1994). This technique was developed by Bechold in 1925 (Nemeth 1979) by combining ultrafiltration with electrodialysis.…”

Section: Assessment Of Nutrient Availabilitymentioning

confidence: 99%

Integrating knowledge of nutrient forms and dynamics into improved nutrient management practices: Atribute to Régis Simard

Grant¹,

Ziadi²,

Gagnon³

et al. 2009

Can. J. Soil. Sci.

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Régis Simard and his colleagues developed a research program focussing on the agronomic and environmental impacts of nutrients in agricultural systems. The success of this program resulted from an integrated approach, linking assessment of nutrient availability to an understanding of nutrient dynamics in the soil, and applying this understanding to development of improved management practices for a variety of nutrient sources. Research into nutrient availability conducted by Régis and his co-workers led to improvements in quantification of nutrient supply, using traditional soil analysis with batch chemical extraction as well as ionic exchange membranes (IEMs) and electro-ultrafiltration (EUF). Ion exchange membranes are now used as a tool in routine soil fertility assessments and in agronomic and environmental research to study nutrient ion release rates. Additionally, intensive analytical techniques, such as sequential extraction and X-ray absorption near-edge structure (XANES) were developed and used to characterize the forms and relative availability of soil nutrients for plant uptake or environmental effects. Characterization of nutrient pools improved understanding of nutrient dynamics in the soil, allowing a more accurate assessment of the agronomic value and environmental risk of nutrients applied to agricultural systems. Building on this knowledge, Régis and his colleagues developed improved methods of utilizing manures, composts, paper mill sludge (PMS) and liming by-products, effectively diverting nutrients from the waste stream into a resource for crop production. This paper describes the contributions of Régis and his colleagues to the improvement of agronomically and environmentally sustainable nutrient management practices, based on an integrated research approach that provided a clear understanding nutrient availability and soil nutrient dynamics. Key words: Chemical extraction, integrated nutrient management, ion exchange membranes, paper mill sludge, soil phosphorus, soil potassium

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Section: Assessment Of Nutrient Availabilitymentioning

confidence: 99%

Integrating knowledge of nutrient forms and dynamics into improved nutrient management practices: Atribute to Régis Simard

Grant¹,

Ziadi²,

Gagnon³

et al. 2009

Can. J. Soil. Sci.

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“…The electro-ultrafiltration (EUF) technique has been successfully used, especially in Europe and Asia, to predict the short-and long-term P availability from soils (Nemeth 1979) and fertilizers (Judel et al 1985;Steffens 1994). Simard and Tran (1993) found that EUF-extractable P and 0.5 M NaHCO 3 -soluble P are closely correlated to P uptake by oat (Avena sativa L.) and corn (Zea mays L.).…”

Section: Mots Clésmentioning

confidence: 99%

Soil-available phosphorus as evaluated by desorption techniques and chemical extractions

Ziadi¹,

Simard²,

Tran³

et al. 2001

Can. J. Soil. Sci.

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. Soil-available phosphorus as evaluated by desorption techniques and chemical extractions. Can. J. Soil Sci. 81: 167-174. The P-supplying power of the fine-textured soils from Abitibi-Temiscaming (Quebec, Canada) has never been investigated. Anion exchange membranes (AEM), the electro-ultrafiltration (EUF) technique and chemical extractions were used to describe their P status. Phosphorus was desorbed from four soils that had received 52.4 kg P ha -1 yr -1 from 1994 to 1996 and from unfertilized soils. The cumulative amount of P desorbed in 75 min by EUF from unfertilized soils varied from 10 to 69 mg P kg -1 . Averaged over all sites and treatments, the amount of soil P extracted by different methods ranged from 1.0 to 18.9 mg P kg -1 . The cumulative grass P uptake was significantly related to P desorbed by all methods (0.39 < r < 0.84). A close relationship between grass P uptake and P AEMs indicated the adequacy of the AEMs to determine plant-available P in Abitibi-Temiscaming soils. A high degree of linearity (0.97 < R 2 < 0.99) of the EUF-P desorption curves at 200 V and 20°C with time was obtained. This indicates that soils have a high capacity to buffer removal of P from soil solution with reserve P. The EUF technique has shown that these soils hold very large inorganic P reserves and this may explain the lack of grass response to P fertilizers.Key words: Anion exchange membranes, grass-P uptake, P-desorption, Mehlich3-P, Olsen-P.Ziadi, N., Simard, R. R., Tran, T. S. et Allard, G. 2001. Evaluation de la disponibilité du phosphore du sol par des techniques de désorption et des extractifs chimiques. Can. J. Soil Sci. 81: 167-174. La capacité de sols à texture fine de l'Abitibi-Témiscamingue (Québec, Canada) à fournir le P n'a jamais été documentée. Les techniques des membranes d'échange anionique (AEMs), d'Électro-ultrafiltration (EUF) et certaines extractions chimiques ont été utilisées à cette fin. Le P désorbé a été caractérisé dans quatre sols ayant reçu 52,4 kg Pha -1 an -1 de 1994 à 1996 et quatre témoins. La quantité cumulative de P désor-bé des témoins non fertilisés par EUF durant 75 min a varié entre 10 et 69 mg P kg -1 . Les teneurs moyennes du sol en P extrait par les différentes méthodes varie de 1,0 à 18,9 mg P kg -1 . Le prélèvement cumulatif du P par les fourrages était significativement relié ( 0,39 < r < 0,84) aux quantités de P du sol désorbé par toutes les méthodes. La relation étroite entre le prélèvement du P et le P extrait par les membranes d'échange anionique indique l'efficacité de cette méthode à quantifier la disponibilité du P pour les fourrages produits sur les sols à texture fine de l'Abitibi-Témiscamingue. Des degrés de linéarité élevés (0,97 < R 2 < 0,99) entre le P désorbé à 200 V et 20°C par EUF et le temps de désorption ont été obtenus. Ces résultats indiquent que les sols étudiés ont une forte capacité à solubiliser le P à partir de leur réserve. La technique EUF a révélé que ces sols renferment de très grandes réserves de P inorganique et que cela peut expliquer le ma...

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“…Multiple empirical models have been developed to separately capture yield response to N inputs [7][8][9], and to P inputs [10][11][12], and as a response to plant-available soil P [13][14][15]. Both the response to P fertilizer and soil P dynamics have been incorporated into an economic analysis of nutrient inputs [16,17].…”

Section: Introductionmentioning

confidence: 99%

Phosphorus and Nitrogen Yield Response Models for Dynamic Bio-Economic Optimization: An Empirical Approach

et al. 2018

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Nitrogen (N) and phosphorus (P) are both essential plant nutrients. However, their joint response to plant growth is seldom described by models. This study provides an approach for modeling the joint impact of inorganic N and P fertilization on crop production, considering the P supplied by the soil, which was approximated using the soil test P (STP). We developed yield response models for Finnish spring barley crops (Hordeum vulgare L.) for clay and coarse-textured soils by using existing extensive experimental datasets and nonlinear estimation techniques. Model selection was based on iterative elimination from a wide diversity of plausible model formulations. The Cobb−Douglas type model specification, consisting of multiplicative elements, performed well against independent validation data, suggesting that the key relationships that determine crop responses are captured by the models. The estimated models were extended to dynamic economic optimization of fertilization inputs. According to the results, a fair STP level should be maintained on both coarse-textured soils (9.9 mg L −1 a −1 ) and clay soils (3.9 mg L −1 a −1 ). For coarse soils, a higher steady-state P fertilization rate is required (21.7 kg ha −1 a −1 ) compared with clay soils (6.75 kg ha −1 a −1 ). The steady-state N fertilization rate was slightly higher for clay soils (102.4 kg ha −1 a −1 ) than for coarse soils (95.8 kg ha −1 a −1 ). This study shows that the iterative elimination of plausible functional forms is a suitable method for reducing the effects of structural uncertainty on model output and optimal fertilization decisions.

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Yield response and availability of various phosphate fertilizer types as estimated by EUF

Cited by 5 publications

References 12 publications

Integrating knowledge of nutrient forms and dynamics into improved nutrient management practices: Atribute to Régis Simard

Integrating knowledge of nutrient forms and dynamics into improved nutrient management practices: Atribute to Régis Simard

Soil-available phosphorus as evaluated by desorption techniques and chemical extractions

Phosphorus and Nitrogen Yield Response Models for Dynamic Bio-Economic Optimization: An Empirical Approach

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