Wachendorf, Michael

[["dc.bibliographiccitation.firstpage","265"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Photogrammetrie - Fernerkundung - Geoinformation"],["dc.bibliographiccitation.lastpage","275"],["dc.contributor.author","Mewes, Thorsten"],["dc.contributor.author","Erasmi, Stefan"],["dc.contributor.author","Kappas, Martin W."],["dc.contributor.author","Biewer, Sonja"],["dc.contributor.author","Fricke, Thomas"],["dc.contributor.author","Wachendorf, Michael"],["dc.date.accessioned","2018-11-07T11:20:35Z"],["dc.date.available","2018-11-07T11:20:35Z"],["dc.date.issued","2008"],["dc.description.abstract","This paper focuses on the detection of individual fractions of legume and grass species based on Spectral Mixture Analysis of remotely sensed. non-imaging data. In 005 one glasshouse-experiment and one field-experiment were built up and continuous measurements and samples were taken for subsequent comparison. Marked crop-plots were spectrally recorded with the fieldspectrometer ASD Fieldspec (c) Pro JR and subsequently harvested for laboratory analysis. In the first step the reflection signatures were smoothed by the adaptive Savitzky-Golay-Filter and evaluated for inaccurate data by means of descriptive statistics. After reduction to relevant wavelength-ranges the spectra were unmixed to their pure components (endmembers). One of the basic steps here is the selection of accurate endmembers. The endmembers have to represent one fraction in an appropriate manner. The results show the possibilities and limits of the method with fieldspectrometrical data with focus on their usage for site specific forage production. Good relations could be found for the data of the glasshouse-experiment, whereas the data from the field-experiment show deficiencies, mainly due to high weed rates and a more complex stand structure."],["dc.identifier.isi","000261058700003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/55569"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1432-8364"],["dc.title","Spectral Mixture Analysis (SMA) of reflectance curves from Legume-Grass-Plots for the analysis of species composition in forage production."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","128"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Precision Agriculture"],["dc.bibliographiccitation.lastpage","144"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Biewer, Sonja"],["dc.contributor.author","Erasmi, Stefan"],["dc.contributor.author","Fricke, Thomas"],["dc.contributor.author","Wachendorf, Michael"],["dc.date.accessioned","2018-11-07T08:31:26Z"],["dc.date.accessioned","2020-05-11T13:30:32Z"],["dc.date.available","2018-11-07T08:31:26Z"],["dc.date.available","2020-05-11T13:30:32Z"],["dc.date.issued","2009"],["dc.description.abstract","Productivity and botanical composition of legume-grass swards in rotation systems are important factors for successful arable farming in both organic and conventional farming systems. As these attributes vary considerably within a field, a non-destructive method of detection while doing other tasks would facilitate more targeted management of crops and nutrients in the soil-plant-animal system. Two pot experiments were conducted to examine the potential of field spectroscopy to assess total biomass and the proportions of legume, using binary mixtures and pure swards of grass and legumes. The spectral reflectance of swards was measured under artificial light conditions at a sward age ranging from 21 to 70 days. Total biomass was determined by modified partial least squares (MPLS) regression, stepwise multiple linear regression (SMLR) and the vegetation indices (VIs) simple ratio (SR), normalized difference vegetation index (NDVI), enhanced vegetation index (EVI) and red edge position (REP). Modified partial least squares and SMLR gave the largest R (2) values ranging from 0.85 to 0.99. Total biomass prediction by VIs resulted in R (2) values of 0.87-0.90 for swards with large leaf to stem ratios; the greatest accuracy was for EVI. For more mature and open swards VI-based detection of biomass was not possible. The contribution of legumes to the sward could be determined at a constant biomass level by the VIs, but this was not possible when the level of biomass varied."],["dc.identifier.doi","10.1007/s11119-008-9078-9"],["dc.identifier.isi","000263685600003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65060"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.eissn","1573-1618"],["dc.relation.issn","1385-2256"],["dc.title","Prediction of yield and the contribution of legumes in legume-grass mixtures using field spectrometry"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","365"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Agroforestry Systems"],["dc.bibliographiccitation.lastpage","381"],["dc.bibliographiccitation.volume","89"],["dc.contributor.author","Ehret, M."],["dc.contributor.author","Buehle, L."],["dc.contributor.author","Grass, R."],["dc.contributor.author","Lamersdorf, Norbert P."],["dc.contributor.author","Wachendorf, Michael"],["dc.date.accessioned","2018-11-07T09:59:14Z"],["dc.date.available","2018-11-07T09:59:14Z"],["dc.date.issued","2015"],["dc.description.abstract","In the temperate zone, alley cropping is promoted as a climate change-resilient agroforestry practice for the provision of biogenic energy carriers. However, little information is available on the potential of such cropping systems as feedstock for biofuel production. In a field trial in Central Europe, the triennial performance of alley cropping systems was assessed. The systems consisted of clover-grass, a native diversity-oriented grassland mixture and multirows of willows. They were compared to a willow and grassland control adjacent to the trial area. Three different conversion technologies were applied to grassland feedstock and analyzed for relevant quality parameters. Net energy balances were calculated to determine the potential of the cropping systems and the associated controls as providers of biogenic energy carriers. The grassland control had the highest triennial yield (18 t DM ha(-1)), whereas pure willow stands were less productive with 7 t DM ha(-1). Alley cropping was intermediate with 12 t DM ha(-1) on average. Net energy yield of the clover-grass based systems was highest in the grassland control for all conversion technologies, whereas values of the diversity-based systems in the control and the alley cropping system achieved similar values. This study only investigated the first 3 years after establishment, when growth rates of shrub willows were still low. Thus, more research is needed to evaluate the long-term performance of agroforestry systems with shrub willows and herbaceous crops."],["dc.description.sponsorship","German Ministry of Education and Research (BMBF)"],["dc.identifier.doi","10.1007/s10457-014-9773-7"],["dc.identifier.isi","000351195300014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37547"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1572-9680"],["dc.relation.issn","0167-4366"],["dc.title","Bioenergy provision by an alley cropping system of grassland and shrub willow hybrids: biomass, fuel characteristics and net energy yields"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Basic and Applied Ecology"],["dc.bibliographiccitation.lastpage","73"],["dc.bibliographiccitation.volume","23"],["dc.contributor.author","Weisser, Wolfgang W."],["dc.contributor.author","Roscher, Christiane"],["dc.contributor.author","Meyer, Sebastian T."],["dc.contributor.author","Ebeling, Anne"],["dc.contributor.author","Luo, Guangjuan"],["dc.contributor.author","Allan, Eric"],["dc.contributor.author","Beßler, Holger"],["dc.contributor.author","Barnard, Romain L."],["dc.contributor.author","Buchmann, Nina"],["dc.contributor.author","Buscot, François"],["dc.contributor.author","Engels, Christof"],["dc.contributor.author","Fischer, Christine"],["dc.contributor.author","Fischer, Markus"],["dc.contributor.author","Gessler, Arthur"],["dc.contributor.author","Gleixner, Gerd"],["dc.contributor.author","Halle, Stefan"],["dc.contributor.author","Hildebrandt, Anke"],["dc.contributor.author","Hillebrand, Helmut"],["dc.contributor.author","de Kroon, Hans"],["dc.contributor.author","Huber-Lang, Markus S."],["dc.contributor.author","Leimer, Sophia"],["dc.contributor.author","Le Roux, Xavier"],["dc.contributor.author","Milcu, Alexandru"],["dc.contributor.author","Mommer, Liesje"],["dc.contributor.author","Niklaus, Pascal A."],["dc.contributor.author","Oelmann, Yvonne"],["dc.contributor.author","Proulx, Raphael"],["dc.contributor.author","Roy, Jacques"],["dc.contributor.author","Scherber, Christoph"],["dc.contributor.author","Scherer-Lorenzen, Michael"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Wachendorf, Michael"],["dc.contributor.author","Wagg, Cameron"],["dc.contributor.author","Weigelt, Alexandra"],["dc.contributor.author","Wilcke, Wolfgang"],["dc.contributor.author","Wirth, Christian"],["dc.contributor.author","Schulze, Ernst-Detlef"],["dc.contributor.author","Schmid, Bernhard"],["dc.contributor.author","Eisenhauer, Nico"],["dc.date.accessioned","2019-07-23T08:40:42Z"],["dc.date.available","2019-07-23T08:40:42Z"],["dc.date.issued","2017"],["dc.description.abstract","In the past two decades, a large number of studies have investigated the relationship between biodiversity and ecosystem functioning, most of which focussed on a limited set of ecosystem variables. The Jena Experiment was set up in 2002 to investigate the effects of plant diversity on element cycling and trophic interactions, using a multi-disciplinary approach. Here, we review the results of 15 years of research in the Jena Experiment, focussing on the effects of manipulating plant species richness and plant functional richness. With more than 85,000 measures taken from the plant diversity plots, the Jena Experiment has allowed answering fundamental questions important for functional biodiversity research."],["dc.identifier.doi","10.1016/j.baae.2017.06.002"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16486"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61897"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","1439-1791"],["dc.rights","CC BY-NC-ND 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc-nd/4.0"],["dc.title","Biodiversity effects on ecosystem functioning in a 15-year grassland experiment: Patterns, mechanisms, and open questions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]