Microbial biomass and N mineralization in relation to N supply of sugar beet under reduced tillage

Hoffmann, Christa; Platte, H.; Lickfett, T.; Koch, H.

doi:10.1002/jpln.19971600211

Cited by 19 publications

(5 citation statements)

References 21 publications

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“…The quality development at individual sites may differ from the average owing not only to weather conditions, but also to nitrogen availability. Despite the strong dependence of N mineralization on water availability and temperature 41. nitrogen availability may be a potential cause of the lack of correlation between the summer and autumn values of α‐amino nitrogen and total soluble nitrogen, although on average the concentrations were nearly constant after July.…”

Section: Discussionmentioning

confidence: 99%

Probing the Mechanical Properties of Hybrid Inorganic–Organic Frameworks: A Computational and Experimental Study

et al. 2010

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Hybrid framework materials are modular compounds consisting of metal ions and organic linkers, variation of which has given rise to a myriad of structures with technologically relevant properties. To date, extensive experimental and theoretical studies have been carried out to understand key factors that affect processes such as gas adsorption, gas separation and heterogeneous catalysis in nanoporous metal-organic frameworks (MOFs).[1] Dense hybrid frameworks are also of growing interest on account of their unique physical properties, such as multiferroics, electronic conductivity and photoluminescence, among others.[2] For all viable applications, the robustness of the materials and, in particular, a detailed understanding of their mechanical properties, are necessary for successful utilization. This field, however, remains largely unexplored. Recent experimental studies [3] have demonstrated that the elastic properties, especially the bulk modulus (B) [4] and the Young's modulus (E) [5] of nanoporous and dense hybrid frameworks, can be correlated to their density, dimensionality and their underlying chemical structures. In addition, recent computational studies have reported that the bulk moduli of a family of isoreticular metal-organic frameworks (IRMOFs) depend on the size of the aromatic organic linkers (which determines the density).[6] Herein, we employed a combination of computational and experimental approaches to probe the elastic properties of a dense and anisotropic hybrid framework material: zinc phosphate phosphonoacetate hydrate, Zn 3 -(PO 4 )(O 2 CCH 2 PO 3 )(H 2 O), 1. [7] We propose an efficient computational scheme for the approximate analysis of the Young's modulus and the Poisson's ratio (n) along the principal directions of an anisotropic crystal. Notably, this approach circumvents the intricacies involved in computing the full elastic stiffness tensor.[8] The validity of our theoretical calculations was confirmed by single-crystal nanoindentation experiments. In addition, theoretical studies were performed by subjecting the anisotropic framework to hydrostatic compression to reveal the role of the basic building blocks.Studies to date indicate that both the local density approximation (LDA) and the general gradient approximation (GGA) levels of density functional theory (DFT) have over-predicted the bulk modulus (B) of MOF materials. By way of an example, the B value of the lightweight MOF-5 (density of 0.59 g cm À3

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Section: Discussionmentioning

confidence: 99%

Probing the Mechanical Properties of Hybrid Inorganic–Organic Frameworks: A Computational and Experimental Study

et al. 2010

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“…Although N immobilization can result in reduced yields (Deenik et al, 2010), in a wet season such as the March -June period in this study, it probably mitigated NO 3 leaching potential, which possibly resulted in higher N efficiency. However, from a long-term field trial in Gottingen, Hoffmann et al (1997) concluded that minimal tillage systems increased Nnet mineralisation compared with conventional tillage systems, mainly due to the greater microbial biomass under reduced tillage. More research is therefore required to determine the factor(s) with overriding effects on sewage sludge N mineralization under Botswana conditions for development of sewage sludge management guidelines on agricultural soils.…”

Section: Seasonmentioning

confidence: 99%

Effects of biochar and sewage sludge on spinach (Spinacia oleracea L.) yield and soil NO3- content in texturally different soils in Glen Valley, Botswana

Majaule¹,

Dikinya²,

Moseki³

et al. 2020

Afr. J. Biotechnol.

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“…Changes in C mjc / Corg are usually related with organic matter or microbial activity. Higher Cmlc/ Corg ratio is indicative of the decomposition of organic matter (Hoffmann et al , 1997) while lower C m« / Corg ratio, low-level and stable microbial activities ( Beyer et al , 1999) . Our results show that higher C mic / Corg values in roadside soils reflect depletion in soil organic matter and unstability in soil microbial activities.…”

Section: Microbial Ecophysiological -Parametersmentioning

confidence: 99%

Urban soil microbial features and their environmental significance as exemplified by Aberdeen City, UK

Yang

Paterson

Campbell

2001

Chin. J. of Geochem.

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Urban soil research has invoked great interest in recent years . Previous studies were mainly focused on urban soil physics and chemistry, and soil geography to constrain the source, distribution, transport and deposition of pollutants such as heavy metals and health-hazardous organic matter, but little has been done on soil microbiology. In this paper, the authors reported the variation of microbial features in urban soils compared with those from adjacent rural areas. The results show great changes in basal respiration rates, microbial biomass and ecophysiological parameters have taken place in urban environment because of the anthropogenic stress, thus activating the microorganisms. As a result, much more energy carbon is consumed at a low utilization efficiency. So microbial biosensors can be used to indicate urban environmental pollution effectively.

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Microbial biomass and N mineralization in relation to N supply of sugar beet under reduced tillage

Cited by 19 publications

References 21 publications

Probing the Mechanical Properties of Hybrid Inorganic–Organic Frameworks: A Computational and Experimental Study

Probing the Mechanical Properties of Hybrid Inorganic–Organic Frameworks: A Computational and Experimental Study

Effects of biochar and sewage sludge on spinach (Spinacia oleracea L.) yield and soil NO3- content in texturally different soils in Glen Valley, Botswana

Urban soil microbial features and their environmental significance as exemplified by Aberdeen City, UK

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