caa a22 4500 477110630 CHVBK 20180405111607.0 cr unu---uuuuu 170330e19960101xx s 000 0 eng 10.1007/BF00011595 doi (NATIONALLICENCE)springer-10.1007/BF00011595 Preliminary studies of the impact of excreted N on cycling and uptake of N in pasture systems using natural abundance stable isotopic discrimination [Elektronische Daten] [S. Kerley, S. Jarvis] The possibility of using natural abundance techniques to determine N transformations and flows after deposition of cattle dung has been examined. These preliminary results showed that δ15N in dung was greater than in plants growing in association with particular pats. This, and other observational information, indicated that dung pats of different ages were being examined. There were significant variations in plant δ15N signatures within and between species grown in association and away from the dung. It was probable that variation in plant δ15N was brought about by changes in soil mineral N pools after transfer of N derived from the dung. This resulted in different δ15N signatures in Trifolium repens (because of changes in N utilization from soil or atmospheric pools), in Lolium perenne (because of changes in δ15N in soil mineral N), but not in Ranunculus repens (because the majority of active roots were outside the range of immediate influence of the deposited dung). The differences in δ15N allowed the development of hypotheses for changes in soil N pools and the acquisition of N by plants from soil, dung or atmospheric sources. Kluwer Academic Publishers, 1996 clover nationallicence δ15N nationallicence dung nationallicence ryegrass nationallicence soils nationallicence transfer nationallicence uptake nationallicence Kerley S. Institute of Grassland and Environmental Research, North Wyke, EX2O 2SB, Okehampton, Devon, UK aut Jarvis S. Institute of Grassland and Environmental Research, North Wyke, EX2O 2SB, Okehampton, Devon, UK aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 178/2(1996-01-01), 287-294 0032-079X 178:2<287 1996 178 11104 https://doi.org/10.1007/BF00011595 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00011595 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kerley S. Institute of Grassland and Environmental Research, North Wyke, EX2O 2SB, Okehampton, Devon, UK aut NATIONALLICENCE 700 1- Jarvis S. Institute of Grassland and Environmental Research, North Wyke, EX2O 2SB, Okehampton, Devon, UK aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl// 178/2(1996-01-01), 287-294 0032-079X 178:2<287 1996 178 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer