Tonn, Bettina

[["dc.bibliographiccitation.firstpage","588"],["dc.bibliographiccitation.lastpage","590"],["dc.bibliographiccitation.seriesnr","21"],["dc.contributor.author","Ebeling, D."],["dc.contributor.author","Tonn, B."],["dc.contributor.author","Isselstein, J."],["dc.contributor.editor","Höglind, M."],["dc.contributor.editor","Bakken, A. K."],["dc.contributor.editor","Hovstad, K. A."],["dc.contributor.editor","Kallioniemi, E."],["dc.contributor.editor","Riley, H."],["dc.contributor.editor","Steinshamn, H."],["dc.contributor.editor","Østrem, L."],["dc.date.accessioned","2017-09-07T11:51:47Z"],["dc.date.available","2017-09-07T11:51:47Z"],["dc.date.issued","2016"],["dc.description.abstract","In extensive grazing systems selective grazing creates stable mosaic structures consisting of frequently grazed, short patches and rarely grazed, tall patches. The stocking rate determines the share of different patch types on a pasture. In the present experiment biomass production of different patch types (‘short’, ’medium’, ‘tall’) and biomass production of paddocks treated with different stocking rates (‘moderate’, ‘lenient’, ‘very lenient’ – 6, 12, 18 cm target sward height) were analysed. The experiment was conducted on a long-term low-intensity set-stocked cattle pasture. We focused on total annual aboveground net primary productivity (ANPP) and on the temporal distribution of ANPP. We hypothesized that short patches are more productive and biomass growth is distributed more homogeneously throughout the season than in tall patches. Furthermore we assumed that paddocks grazed moderately are more productive and biomass growth is distributed more homogeneously than in more leniently grazed paddocks. The results showed that tall patches were not less productive than short patches, which led to similar ANPP of paddocks. ANPP of short patches and moderately grazed paddocks was distributed most homogeneously throughout the season."],["dc.identifier.gro","3148048"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5391"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","EGF"],["dc.publisher.place","Norway"],["dc.relation.conference","26th General Meeting of the European Grassland Federation"],["dc.relation.crisseries","Grassland Science in Europe"],["dc.relation.eventend","2016-09-08"],["dc.relation.eventlocation","Trondheim, Norway"],["dc.relation.eventstart","2016-09-04"],["dc.relation.isbn","978-82-17-01677-9"],["dc.relation.ispartof","The multiple roles of grassland in the European bioeconomy"],["dc.relation.ispartofseries","Grassland Science in Europe; 21"],["dc.title","Patch-dependent herbage growth drives paddock productivity in a long-term extensive grazing system"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","666"],["dc.bibliographiccitation.lastpage","668"],["dc.bibliographiccitation.seriesnr","21"],["dc.contributor.author","Tonn, B."],["dc.contributor.author","Grabow, I."],["dc.contributor.author","Krohne, I."],["dc.contributor.author","Potthoff, M."],["dc.contributor.author","Isselstein, J."],["dc.contributor.editor","Höglind, M."],["dc.contributor.editor","Bakken, A. K."],["dc.contributor.editor","Hovstad, K. A."],["dc.contributor.editor","Kallioniemi, E."],["dc.contributor.editor","Riley, H."],["dc.contributor.editor","Steinshamn, H."],["dc.contributor.editor","Østrem, L."],["dc.date.accessioned","2017-09-07T11:51:56Z"],["dc.date.available","2017-09-07T11:51:56Z"],["dc.date.issued","2016"],["dc.description.abstract","Pastures with low grazing pressure are often characterized by a sward mosaic of short, frequently grazed and tall, rarely grazed patches. These two patch types differ in the quantity of litter returned to the system, but may also produce different litter quality and provide different conditions for decomposition. We collected litter from short and tall patches of a cattle pasture in both May and August. A litter bag method was used to assess in situ decomposition of these litter samples in either short or tall patches over a period of two to six weeks after sampling. We expected faster decomposition of litter from short patches and of litter incubated in tall patches. Contrary to our first hypothesis, litter from short patches only showed faster decomposition than litter from tall patches during the second incubation period. During the first incubation period, the opposite was the case. Compared to litter incubated in short patches, litter incubated in tall patches tended to decompose faster, confirming our second hypothesis."],["dc.identifier.gro","3148095"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5442"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","EGF"],["dc.publisher.place","Norway"],["dc.relation.crisseries","Grassland Science in Europe"],["dc.relation.eventend","2016-09-08"],["dc.relation.eventlocation","Trondheim, Norway"],["dc.relation.eventstart","2016-09-04"],["dc.relation.isbn","978-82-17-01677-9"],["dc.relation.ispartof","The multiple roles of grassland in the European bioeconomy"],["dc.relation.ispartofseries","Grassland Science in Europe; 21"],["dc.title","Litter decomposition on a heterogeneous cattle pasture is influenced by sward structure"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","669"],["dc.bibliographiccitation.lastpage","671"],["dc.bibliographiccitation.seriesnr","21"],["dc.contributor.author","Riesch, F."],["dc.contributor.author","Stroh, H. G."],["dc.contributor.author","Tonn, B."],["dc.contributor.author","Isselstein, J."],["dc.contributor.editor","Höglind, M."],["dc.contributor.editor","Bakken, A. K."],["dc.contributor.editor","Hovstad, K. A."],["dc.contributor.editor","Kallioniemi, E."],["dc.contributor.editor","Riley, H."],["dc.contributor.editor","Steinshamn, H."],["dc.contributor.editor","Østrem, L."],["dc.date.accessioned","2017-09-07T11:51:54Z"],["dc.date.available","2017-09-07T11:51:54Z"],["dc.date.issued","2016"],["dc.description.abstract","Central Europe is dominated by intensive farming and the concomitant nutrient input is a main thread to biodiversity in open habitats. The rare case of soils unaffected by agricultural intensification found on a military training area (Grafenwoehr, Bavaria, Germany) was used as an opportunity to study the influence of soil chemical factors on plant species richness in two types of open habitats. Species richness of spermatophytes and soil chemical factors (pH, P, K, Mg ) were assessed on a total of 94 relevés situated in heathlands (40 relevés) and grasslands (54 relevés). Averaging over linear mixed models, we showed a distinct decline of plant species richness with decreasing pH in both habitats. Despite generally low soil P content, species richness declined strongly with increasing soil P in grassland. Consequently, to preserve highly diverse open habitats, it is necessary to spare them from anthropogenic nutrient input."],["dc.identifier.gro","3148096"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5444"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","EGF"],["dc.publisher.place","Norway"],["dc.relation.conference","26th General Meeting of the European Grassland Federation"],["dc.relation.crisseries","Grassland Science in Europe"],["dc.relation.eventend","2016-09-08"],["dc.relation.eventlocation","Trondheim, Norway"],["dc.relation.eventstart","2016-09-04"],["dc.relation.isbn","978-82-17-01677-9"],["dc.relation.ispartof","The multiple roles of grassland in the European bioeconomy"],["dc.relation.ispartofseries","Grassland Science in Europe;21"],["dc.title","Phytodiversity in nutrient-poor heathlands and grasslands: how important are soil chemical factors?"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","77"],["dc.bibliographiccitation.lastpage","79"],["dc.bibliographiccitation.seriesnr","21"],["dc.contributor.author","Becker, T."],["dc.contributor.author","Kayser, M."],["dc.contributor.author","Tonn, B."],["dc.contributor.author","Isselstein, J."],["dc.contributor.editor","Höglind, M."],["dc.contributor.editor","Bakken, A. K."],["dc.contributor.editor","Hovstad, K. A."],["dc.contributor.editor","Kallioniemi, E."],["dc.contributor.editor","Riley, H."],["dc.contributor.editor","Steinshamn, H."],["dc.contributor.editor","Østrem, L."],["dc.date.accessioned","2017-09-07T11:51:43Z"],["dc.date.available","2017-09-07T11:51:43Z"],["dc.date.issued","2016"],["dc.description.abstract","Fifty four German dairy farmers answered a questionnaire concerning their attitude towards the impact of grazing on the milk production. Farmers, who provide access to pasture for their cows are not worried, that this could reduce the performance of their cows. This applies to both, grazing farms, where grass still contributes a part to the ration of the cows as well as for farms with highly restricted grazing, where the possible intake of grass is negligible. In contrast to this, farmers with all-year housing assume that grazing would reduce the milk production of cows. We also found that the performance of the cows on grazing farms is significantly lower than the performance of cows on farms with highly restricted grazing or non-grazing farms. Moreover, cows on grazing farms are generally provided with less energ y from maize and concentrates than cows from non-grazing farms and farms with highly restricted grazing. We conclude that farmers with different management systems have different opinions on what they regard as a high milk production. While farmers from grazing farms are content with the milk production they achieve, farmers from non-grazing farms and from farms with highly restricted grazing pursue a higher milk production."],["dc.identifier.gro","3148022"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5362"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","EGF"],["dc.publisher.place","Norway"],["dc.relation.crisseries","Grassland Science in Europe"],["dc.relation.eventend","2016-09-08"],["dc.relation.eventlocation","Trondheim, Norway"],["dc.relation.eventstart","2016-09-04"],["dc.relation.isbn","978-82-17-01677-9"],["dc.relation.ispartof","The multiple roles of grassland in the European bioeconomy"],["dc.relation.ispartofseries","Grassland Science in Europe; 21"],["dc.title","Attitudes of German grazing and non-grazing farmers towards the impact of grazing on milk production"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","470"],["dc.bibliographiccitation.lastpage","472"],["dc.contributor.author","Scheile, T."],["dc.contributor.author","Isselstein, J."],["dc.contributor.author","Tonn, B."],["dc.contributor.editor","Höglind, M."],["dc.contributor.editor","Bakken, A. K."],["dc.contributor.editor","Hovstad, K. A."],["dc.contributor.editor","Kallioniemi, E."],["dc.contributor.editor","Riley, H."],["dc.contributor.editor","Steinshamn, H."],["dc.contributor.editor","Østrem, L."],["dc.date.accessioned","2017-09-07T11:51:58Z"],["dc.date.available","2017-09-07T11:51:58Z"],["dc.date.issued","2016"],["dc.description.abstract","Grazing animals have a great influence on nutrient cycling and productivity of pastures, especially through the deposition of urine and dung. Animal species differ in pattern of nutrient return and grazing response to excreta. A two-factorial experiment on rotationally grazed pastures was performed, using cattle and sheep as grazer species and grass swards of different botanical composition, either grass-dominated or diverse. Urine, dung and control patches were marked in situ in every plot in spring and autumn of 2014. In the following rotation one half of each marked patch was harvested before the next grazing rotation started (‘biomass productivity’) and the other half after that grazing rotation ended (‘forage residue’). The biomass productivity was increased at the urine patches within the next grazing rotation. We also found significantly more biomass remaining at the dung patches following the next grazing rotation, showing an effect of excreta patches on forage residue. Contrary to our initial expectation, the effect of excreta patches on biomass productivity and animal response were neither animal- nor sward-specific."],["dc.identifier.gro","3148105"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5453"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","EGF"],["dc.publisher.place","Norway"],["dc.relation.eventend","2016-09-08"],["dc.relation.eventlocation","Trondheim, Norway"],["dc.relation.eventstart","2016-09-04"],["dc.relation.isbn","978-82-17-01677-9"],["dc.relation.ispartof","The multiple roles of grassland in the European bioeconomy"],["dc.title","Effect of excreta patches on biomass productivity and grazing selectivity in low-input pastures"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","660"],["dc.bibliographiccitation.lastpage","662"],["dc.bibliographiccitation.seriesnr","21"],["dc.contributor.author","Heshmati, S."],["dc.contributor.author","Tonn, B."],["dc.contributor.author","Isselstein, J."],["dc.contributor.editor","Höglind, M."],["dc.contributor.editor","Bakken, A. K."],["dc.contributor.editor","Hovstad, K. A."],["dc.contributor.editor","Kallioniemi, E."],["dc.contributor.editor","Riley, H."],["dc.contributor.editor","Steinshamn, H."],["dc.contributor.editor","Østrem, L."],["dc.date.accessioned","2017-09-07T11:52:11Z"],["dc.date.available","2017-09-07T11:52:11Z"],["dc.date.issued","2016"],["dc.description.abstract","The benefits of growing Lolium perenne and Trifolium repens in mixtures have long been recognized. Increasing interest has recently been given to the productivity of multi-species mixtures including forbs. Little is known of whether genetic variation within forage species affects competition and complementarity among species in mixed stands and therewith overall sward performance. An experiment was performed with four varieties of L. perenne grown either in monoculture with nitrogen fertilization (200 kg ha-1 a-1) or in unfertilized binary (with T. repens) and multi-species mixtures (including Plantago lanceolata L. and Taraxacum officinale Web.). The L. perenne varieties differed in time of heading (early, late) and growth habit (prostrate, erect). Aboveground herbage was cut four times a year over four years. The results showed that the unfertilized multi-species mixture had the same total yield as the fertilized L. perenne monoculture. The erect form of L. perenne showed a significantly higher yield than the prostrate one, both in L. perenne monoculture and in mixture with T. repens. In the multi-species mixture the L. perenne variety had no effect on the total dry matter yield."],["dc.identifier.gro","3148108"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5458"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","EGF"],["dc.publisher.place","Norway"],["dc.relation.conference","26th General Meeting of the European Grassland Federation"],["dc.relation.crisseries","Grassland Science in Europe"],["dc.relation.eventend","2016-09-08"],["dc.relation.eventlocation","Trondheim, Norway"],["dc.relation.eventstart","2016-09-04"],["dc.relation.isbn","978-82-17-01677-9"],["dc.relation.ispartof","The multiple roles of grassland in the European bioeconomy"],["dc.relation.ispartofseries","Grassland Science in Europe; 21"],["dc.title","Does the variety of Lolium perenne affect the performance of binary and multi-species mixtures?"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","711"],["dc.bibliographiccitation.lastpage","713"],["dc.bibliographiccitation.seriesnr","21"],["dc.contributor.author","Köhler, J."],["dc.contributor.author","Ebeling, D."],["dc.contributor.author","Tonn, B."],["dc.contributor.author","Isselstein, J."],["dc.contributor.editor","Höglind, M."],["dc.contributor.editor","Bakken, A. K."],["dc.contributor.editor","Hovstad, K. A."],["dc.contributor.editor","Kallioniemi, E."],["dc.contributor.editor","Riley, H."],["dc.contributor.editor","Steinshamn, H."],["dc.contributor.editor","Østrem, L."],["dc.date.accessioned","2017-09-07T11:51:47Z"],["dc.date.available","2017-09-07T11:51:47Z"],["dc.date.issued","2016"],["dc.description.abstract","of nutrients. In low-intensity grazing systems, selective grazing leads to the formation of areas that are more frequently defoliated (short patches) than others (tall patches), which is called patch grazing. The different patch types are supposed to have different aboveground biomass productivities. The stocking rate determines the ratio of short and tall patches on a pasture. In a long-term low-intensity cattle grazing experiment with three different stocking rates (target sward heights: 6 cm (moderate), 12 cm (lenient) and 18 cm (very lenient)), the root and shoot biomass of two different patch types (short and tall) was analysed. Due to frequent defoliation we assumed that the root mass is lower in short patches than in tall patches. In contrast to the assumption, the root mass of tall patches was significantly lower than the root mass in short patches. The adverse effect of frequent defoliation on root mass might have been superimposed by a nutrient effect as the nitrogen availability in tall patches appeared to be higher than in short patches."],["dc.identifier.gro","3148049"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5392"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","EGF"],["dc.publisher.place","Norway"],["dc.relation.conference","26th General Meeting of the European Grassland Federation"],["dc.relation.crisseries","Grassland Science in Europe"],["dc.relation.eventend","2016-09-08"],["dc.relation.eventlocation","Trondheim, Norway"],["dc.relation.eventstart","2016-09-04"],["dc.relation.isbn","978-82-17-01677-9"],["dc.relation.ispartof","The multiple roles of grassland in the European bioeconomy"],["dc.relation.ispartofseries","Grassland Science in Europe; 21"],["dc.title","Root mass of differentially defoliated patches on a long-term grazing experiment"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]