Simulation of nitrogen in soil and winter wheat crops: modelling nitrogen turnover through organic matter

Whitmore, A. P.; Coleman, Kevin; Bradbury, N. J.; Addiscott, T. M.

doi:10.1007/978-94-011-3434-7_13

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…Generally, small pools with high turnover rates (referred to as ''decomposable'' or ''labile'' or ''active'') and larger pools with slower turnover rates (referred to as ''recalcitrant'' or ''resistant'' or ''slow'') are distinguished [14,51,92]. Some models consider microbial biomass as one of the defined pools while others do not include a biomass pool and model it as part of the stable organic matter/humus pool [41, 51,92,119]. Some models with a distinct biomass pool consider microbial growth and maintenance.…”

Section: Multi-compartment Simulation Modelsmentioning

confidence: 99%

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

et al. 2013

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Summary Wastes generated from municipal and agricultural activities have the tremendous potential for application in agriculture as a source of nutrients and as amendments to improve soil organic matter (SOM). A decline in SOM can represent a serious threat to soil fertility and quality. Nitrogen (N) mineralization from organic amendments is important for understanding the N dynamics in terrestrial ecosystems. In this review, quality of the amendments such as C/N ration, N content, and biochemical compositions, etc. are discussed. Since, C/N ratio cannot explain all differences in N mineralization; emphasis has been laid on characterizing different compounds in organic amendments that govern the mineralization process. The importance of simulation models has also been described in modeling N mineralization from some complex materials like compost, animal manures and farmyard manures. These complex simulation models once modified according to the quality of the organic amendments can simulate N mineralization and thus, they can be used for simulating N dynamics in terrestrial eco-systems.

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Section: Multi-compartment Simulation Modelsmentioning

confidence: 99%

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

et al. 2013

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“…This could partly be attributed to increased microbial nitrogen immobilization ( Vilsmeier and Gutser, 1990). Finally, separately collected and field applied urine nearly reached the efficiency of urea fertilizer (61.7% vs. 77.6%; Ssrensen and Jensen, 1996), whereas only 16% of the nitrogen from separately collected and field applied solid faeces were recovered in plants ( Whitmore et al, 1991).…”

Section: Plant Uptake Of Slurry Nitrogenmentioning

confidence: 99%

Nitrogen turnover in soil after application of animal manure and slurry as studied by the stable isotope ¹⁵N: A review

Dittert

Goerges

Sattelmacher

1998

J Plant Nutrition & Soil

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In the last decades many aspects of nitrogen turnover have been studied by 15N methods. In this article contemporary 15N tracer as well as natural 15N abundance methods for the study of animal manure turnover are briefly reviewed. The nitrogen dynamics after application of farmyard manure and slurry are elucidated. Here, emphasis was put on results from 15N stable isotope work in the fields of nitrogen immobilization, nitrogenous trace gas emissions, turnover of organic nitrogen fractions, and finally plant uptake. Added nitrogen interactions, which must be considered when interpreting 15N studies, are discussed. Finally promising research fields for the use of stable isotopes are outlined.

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“…Some models consider microbial biomass as one of the defined pools (Jenkinson 1990;Hansen et al, 1991;Whitmore et al, 1991) while others do not include it (Rijtema and Kroes, 1991). Some of the models with their pool structures and C/N ratio of pools are given in Table 2.2.…”

Section: Models With Conceptual Som Poolsmentioning

confidence: 99%

Simulation of nitrogen release from organic materials in the soybean/wheat cropping systems on Vertisols in central India

Mohanty¹

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The soybean (Glycine max L.)-wheat (Triticum aestivum, L.) cropping system is the dominant cropping system on Vertisols of Madhya Pradesh in central India, but the yield of soybean has been decreased significantly over recent years due to biotic and abiotic factors. The yield of wheat following soybean in this region is also governed by the availability of irrigation water. So managing this cropping system in terms of nutrient and water in Vertisols is important for soybean and wheat production. The proposed research work was undertaken to analyze N release from different organic materials like rice (Oryza sativa, L.) and wheat straw, green manure (like Gliricidia) and farmyard manure (FYM), modeling N release using APSIM (Agricultural Production System Simulator). The APSIM model has been calibrated for first time for Indian FYM, and also tested for the soybeanwheat cropping system permitting prediction of N release from organic amendments varying in C/N ratios and biochemical properties.A laboratory incubation experiment was carried out for 98 days at 30º C under aerobic conditions to study the effects of rice and wheat straw applied at 5 and 10 g kg -1 to a Vertisol soil in the presence or absence of additional N (as urea). The study showed an interactive effect between the rate of application of the residues and additional mineral N.Without additional N, the mineral N in soil was completely immobilised within two weeks, irrespective of the rate of application; initial net immobilisation was limited by the availability of N and was independent of residue rate. When additional N was supplied, initial net immobilisation was dependent on the rate of application of the residue.We used the APSIM SoilN module to simulate N mineralisation from high C/N ratio crop residues, and compared the predictions with the observed data from our incubation study and other published data sets. Model performance was generally satisfactory with a modelling efficiency of 0.82. The major discrepancy between the modelled and the observed data was a tendency for the model to underestimate the initial rate of immobilisation. iii the model based on the FYM composition. Water soluble C and N components were used to specify the conceptual pool FPOOL1 and the measured lignin content to specify the C content of FPOOL3. Using these values and an iterative approach to identifying an Application of

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Simulation of nitrogen in soil and winter wheat crops: modelling nitrogen turnover through organic matter

Cited by 6 publications

References 18 publications

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

Nitrogen turnover in soil after application of animal manure and slurry as studied by the stable isotope ¹⁵N: A review

Simulation of nitrogen release from organic materials in the soybean/wheat cropping systems on Vertisols in central India

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Simulation of nitrogen in soil and winter wheat crops: modelling nitrogen turnover through organic matter

Cited by 6 publications

References 18 publications

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

Nitrogen turnover in soil after application of animal manure and slurry as studied by the stable isotope 15N: A review

Simulation of nitrogen release from organic materials in the soybean/wheat cropping systems on Vertisols in central India

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Nitrogen turnover in soil after application of animal manure and slurry as studied by the stable isotope ¹⁵N: A review