caa a22 4500 469098120 CHVBK 20180323133037.0 cr unu---uuuuu 170328e19920801xx s 000 0 eng 10.1007/BF00317793 doi (NATIONALLICENCE)springer-10.1007/BF00317793 The effect of nitrate-nitrogen supply on bacteria and bacterial-feeding fauna in the rhizosphere of different grass species [Elektronische Daten] [B. Griffiths, R. Welschen, J. van Arendonk, H. Lambers] Summary: Microbial growth in the rhizosphere is affected by the release of organic material from roots, so differences in carbon budgets between plants may affect their rhizosphere biology. This was tested by sampling populations of bacteria and bacteriophagous fauna from the rhizosphere of Lolium perenne, Festuca arundinacea, Poa annua, and Poa pratensis, under conditions of high and low nitrate availability. Concentrations of soluble phenolics and lignin varied considerably between the species but were not related to differences in rhizosphere biology. L. perenne and F. arundinacea supported fewer bacteria than the Poa species. There was no significant rhizosphere effect on the groups of protozoa. The major indicators of rhizosphere productivity were the bacterial-feeding nematodes (mainly Acrobeloides spp.), and there was a large positive effect of added nitrate. Nematode biomass was significantly lower in the rhizosphere of the slow-growing P. pratensis compared with the fast-growing P. annua, indicating that the differential allocation of carbon has affects on rhizosphere biology. A large rhizosphere effect on enchytraeid worms was also observed, and their potential importance in the rhizosphere is discussed. Springer-Verlag, 1992 Bacteria nationallicence Enchytraidae nationallicence Nematoda nationallicence Nitrogen nationallicence Rhizosphere nationallicence Griffiths B. Soil-Plant Dynamics Group, Department of Cellular and Environmental Physiology, Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, Scotland aut Welschen R. Department of Plant Ecology and Evolutionary Biology, University of Utrecht, P.O. Box 800.84, 3508 TB, Utrecht, The Netherlands aut van Arendonk J. Department of Plant Ecology and Evolutionary Biology, University of Utrecht, P.O. Box 800.84, 3508 TB, Utrecht, The Netherlands aut Lambers H. Department of Plant Ecology and Evolutionary Biology, University of Utrecht, P.O. Box 800.84, 3508 TB, Utrecht, The Netherlands aut Oecologia Springer-Verlag 91/2(1992-08-01), 253-259 0029-8549 91:2<253 1992 91 442 https://doi.org/10.1007/BF00317793 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317793 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Griffiths B. Soil-Plant Dynamics Group, Department of Cellular and Environmental Physiology, Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, Scotland aut NATIONALLICENCE 700 1- Welschen R. Department of Plant Ecology and Evolutionary Biology, University of Utrecht, P.O. Box 800.84, 3508 TB, Utrecht, The Netherlands aut NATIONALLICENCE 700 1- van Arendonk J. Department of Plant Ecology and Evolutionary Biology, University of Utrecht, P.O. Box 800.84, 3508 TB, Utrecht, The Netherlands aut NATIONALLICENCE 700 1- Lambers H. Department of Plant Ecology and Evolutionary Biology, University of Utrecht, P.O. Box 800.84, 3508 TB, Utrecht, The Netherlands aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 91/2(1992-08-01), 253-259 0029-8549 91:2<253 1992 91 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer