caa a22 4500 477110525 CHVBK 20180405111607.0 cr unu---uuuuu 170330e19960101xx s 000 0 eng 10.1007/BF00011582 doi (NATIONALLICENCE)springer-10.1007/BF00011582 Nutrient inflow and root proliferation during the exploitation of a temporally and spatially discrete source of nitrogen in soil [Elektronische Daten] [M. van Vuuren, D. Robinson, B. Griffiths] To obtain nutrients mineralised from organic matter in the soil, plants have to respond to its heterogeneous distribution. We measured the timing of nitrogen uptake by wheat from a localised, 15N labelled organic residue in soil, as well as the timing of changes in root length density. We calculated the rates of N uptake per unit root length (inflows) for roots growing through the residue and for the whole root system. A stimulated local inflow appeared to be the main mechanism of exploitation of the residue N during the first five days of exploitation. 8% of the N that the plants would ultimately obtain from the residue was captured in this period. Roots then proliferated in the residue. This, together with a rapidly declining N inflow, contributed to the capture, over the next seven days, of 63% of the N that the plants derived from the residue. After that time, massive root proliferation occurred in the residue, but relatively little further N was captured. Kluwer Academic Publishers, 1996 ammonium nationallicence heterogeneity nationallicence inflow nationallicence localised nutrient nationallicence mineralisation nationallicence 15N nationallicence nitrate nationallicence organic residue nationallicence proliferation nationallicence roots nationallicence soil nationallicence uptake nationallicence wheat nationallicence van Vuuren M. Cellular and Environmental Physiology Department, Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, UK aut Robinson D. Cellular and Environmental Physiology Department, Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, UK aut Griffiths B. Cellular and Environmental Physiology Department, Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, UK aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 178/2(1996-01-01), 185-192 0032-079X 178:2<185 1996 178 11104 https://doi.org/10.1007/BF00011582 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00011582 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- van Vuuren M. Cellular and Environmental Physiology Department, Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, UK aut NATIONALLICENCE 700 1- Robinson D. Cellular and Environmental Physiology Department, Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, UK aut NATIONALLICENCE 700 1- Griffiths B. Cellular and Environmental Physiology Department, Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, UK aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl// 178/2(1996-01-01), 185-192 0032-079X 178:2<185 1996 178 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer