Institution
University of Hohenheim
Education•Stuttgart, Germany•
About: University of Hohenheim is a education organization based out in Stuttgart, Germany. It is known for research contribution in the topics: Population & Soil water. The organization has 8585 authors who have published 16406 publications receiving 567377 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, a rapid method was described for the colorimetric determination of 1.5-15 μg phytate phosphorus in concentrations as low as 3 μg ml−1 in extracts of cereal grains and cereal products.
Abstract: A rapid method is described for the colorimetric determination of 1.5–15 μg phytate phosphorus in concentrations as low as 3 μg ml−1 in extracts of cereal grains and cereal products. The phytic acid is precipitated with an acidic iron-III-solution of known iron content. The decrease of iron in the supernatant is a measure for the phyticacid content.
883 citations
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TL;DR: The extent of the trait data compiled in TRY is evaluated and emerging patterns of data coverage and representativeness are analyzed to conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements.
Abstract: Plant traits-the morphological, anatomical, physiological, biochemical and phenological characteristics of plants-determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodiversity conservation, ecosystem and landscape management, restoration, biogeography and earth system modelling. Since its foundation in 2007, the TRY database of plant traits has grown continuously. It now provides unprecedented data coverage under an open access data policy and is the main plant trait database used by the research community worldwide. Increasingly, the TRY database also supports new frontiers of trait-based plant research, including the identification of data gaps and the subsequent mobilization or measurement of new data. To support this development, in this article we evaluate the extent of the trait data compiled in TRY and analyse emerging patterns of data coverage and representativeness. Best species coverage is achieved for categorical traits-almost complete coverage for 'plant growth form'. However, most traits relevant for ecology and vegetation modelling are characterized by continuous intraspecific variation and trait-environmental relationships. These traits have to be measured on individual plants in their respective environment. Despite unprecedented data coverage, we observe a humbling lack of completeness and representativeness of these continuous traits in many aspects. We, therefore, conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements. This can only be achieved in collaboration with other initiatives.
882 citations
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TL;DR: In this paper, the authors conducted a study to determine the effects of long-term addition of organic and inorganic fertiliser amendments at low rates on soil chemical and biological properties.
Abstract: The effect of organic and inorganic fertiliser amendments is often studied shortly after addition of a single dose to the soil but less is known about the long-term effects of amendments. We conducted a study to determine the effects of long-term addition of organic and inorganic fertiliser amendments at low rates on soil chemical and biological properties. Surface soil samples were taken from an experimental field site near Cologne, Germany in summer 2000. At this site, five different treatments were established in 1969: mineral fertiliser (NPK), crop residues removed (mineral only); mineral fertiliser with crop residues; manure 5.2 t ha −1 yr −1 ; sewage sludge 7.6 t ha −1 yr −1 or straw 4.0 t ha −1 yr −1 with 10 kg N as CaCN 2 t straw −1 . The organic amendments increased the C org content of the soil but had no significant effect on the dissolved organic C (DOC) content. The C/N ratio was highest in the straw treatment and lowest in the mineral only treatment. Of the enzymes studied, only protease activity was affected by the different amendments. It was highest after sewage amendment and lowest in the mineral only treatment. The ratios of Gram+ to Gram− bacteria and of bacteria to fungi, as determined by signature phospholipid fatty acids, were higher in the organic treatments than in the inorganic treatments. The community structure of bacteria and eukaryotic microorganisms was assessed by denaturing gradient gel electrophoresis (DGGE) and redundancy discriminate analyses of the DGGE banding patterns. While the bacterial community structure was affected by the treatments this was not the case for the eukaryotes. Bacterial and eukaryotic community structures were significantly affected by C org content and C/N ratio.
876 citations
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TL;DR: Miscanthus is a tall perennial rhizomatous grass with C4 photosynthesis which originated in East Asia and has been successfully grown in Europe over the past 10 years as discussed by the authors.
Abstract: Miscanthus is a tall perennial rhizomatous grass with C4 photosynthesis which originated in East Asia. This article provides an overview of the most important results and experience gained with miscanthus in Europe over the past 10 years. Field trials have been established throughout Europe from the Mediterranean to southern Scandinavia. Most reported trials have used a vigorous sterile clone Miscanthus x giganteus, which has been propagated vegetatively either by rhizome cutting or in vitro culture. Yields in autumn have been reported in excess of 30 t ha−1 (12 t acre−1) for irrigated trials in southern Europe. Without irrigation autumn yields of 10–25 t ha−1 (dry matter) can be expected. The quality of miscanthus biomass for combustion is in some respect comparable to woody biomass and normally improves by delaying harvesting until the spring, although harvestable yields are thus reduced by 30–50% compared with autumn yields. Different technical options for establishment, harvesting and handling of miscanthus have been developed and these significantly effect production costs. Miscanthus production is characterized by low fertilizer and pesticide requirements making it a relatively benign crop environmentally. The main limitations to miscanthus production from M. x giganteus are the high establishment costs, poor over-wintering at some sites and insufficient water supply in southern regions of Europe. New agronomic techniques and new genotypes with improved characteristics are being developed and screened over the wide range of ecological conditions in Europe. Against this background of European experience the prospects for growing miscanthus in North America are discussed.
874 citations
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TL;DR: In paddy soils, the management-induced, microbially mediated redox processes control the dynamics of soil minerals and soil organic matter, which are strongly related to the microbial accessibility of C and N, but also of Fe as discussed by the authors.
869 citations
Authors
Showing all 8665 results
Name | H-index | Papers | Citations |
---|---|---|---|
Robert J. Lefkowitz | 214 | 860 | 147995 |
Patrick O. Brown | 183 | 755 | 200985 |
Mark Stitt | 132 | 456 | 60800 |
Wolf B. Frommer | 105 | 345 | 30918 |
Muhammad Imran | 94 | 3053 | 51728 |
Muhammad Farooq | 92 | 1341 | 37533 |
Yakov Kuzyakov | 87 | 667 | 37050 |
Werner Goebel | 85 | 367 | 26106 |
Ismail Cakmak | 84 | 249 | 25991 |
Reinhold Carle | 84 | 418 | 24858 |
Michael Wink | 83 | 938 | 32658 |
Albrecht E. Melchinger | 83 | 398 | 23140 |
Tilman Grune | 82 | 479 | 30327 |
Volker Römheld | 79 | 231 | 20763 |
Klaus Becker | 79 | 320 | 27494 |