caa a22 4500 477109489 CHVBK 20180405111604.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF00010458 doi (NATIONALLICENCE)springer-10.1007/BF00010458 Effects of varied soil nitrogen supply on Norway spruce ( Picea abies [L.] Karst.) [Elektronische Daten] I. Shoot and root growth and nutrient uptake [Bettina Seith, Eckhard George, Horst Marschner, Thomas Wallenda, Christoph Schaeffer, Werner Einig, Astrid Wingler, Rüdiger Hampp] During a seven-month period the effect of different nitrogen (N) availability in soil on growth and nutrient uptake was studied in three-year-old Norway spruce (Picea abies [L.] Karst.) trees. The plants were grown in pots on N-poor forest soil supplied with various amounts and forms (inorganic and organic) of N. Increasing supply of inorganic N (as NH4NO3) increased the formation of new shoots and shoot dry weight. The root/shoot dry weight ratio of new growth was drastically decreased from 1.6 in plants without N supply to 0.5 in plants supplied with high levels of NH4NO3. This decrease in root/shoot dry weight ratio was associated with distinct changes in root morphology in favour of shorter and thicker roots. The addition of keratin as organic N source did neither affect growth nor root morphology of the trees. The amount of N taken up by plants was closely related to the supply of inorganic N, and trees supplied with highest levels of NH4NO3 also had the highest N contents in the dry matter of needles and roots. In contrast, N contents in needles of trees grown without additional N, or with keratin supply, were in the deficiency range. Supply of NH4NO3 decreased the contents of phosphate (P) and potassium (K) and therefore markedly increased N/P and N/K ratios in the needles. On the other hand, the contents of calcium (Ca), magnesium (Mg), and manganese (Mn) in the needles were increased in the plants supplied with inorganic N, suggesting high soil availability and promotion of uptake of these divalent cations by high nitrate uptake. The observed effects on root/shoot dry weight ratio, root morphology, and mineral nutrient composition of the needles indicated that high inorganic N supply may increase above-ground productivity but at the same time decrease the tolerance of trees against soil-borne (e.g. deficiency of other mineral nutrients) stress factors. Kluwer Academic Publishers, 1996 foliar nutrient contents nationallicence nitrogen nationallicence Picea abies nationallicence root growth nationallicence root morphology nationallicence root/shoot ratio nationallicence Seith Bettina Institut für Pflanzenernährung, Universität Hohenheim, D-70593, Stuttgart, Germany aut George Eckhard Institut für Pflanzenernährung, Universität Hohenheim, D-70593, Stuttgart, Germany aut Marschner Horst Institut für Pflanzenernährung, Universität Hohenheim, D-70593, Stuttgart, Germany aut Wallenda Thomas Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut Schaeffer Christoph Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut Einig Werner Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut Wingler Astrid Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut Hampp Rüdiger Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut Plant and Soil Kluwer Academic Publishers; gopher://gopher:wkap.nl 184/2(1996-06-01), 291-298 0032-079X 184:2<291 1996 184 11104 https://doi.org/10.1007/BF00010458 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00010458 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Seith Bettina Institut für Pflanzenernährung, Universität Hohenheim, D-70593, Stuttgart, Germany aut NATIONALLICENCE 700 1- George Eckhard Institut für Pflanzenernährung, Universität Hohenheim, D-70593, Stuttgart, Germany aut NATIONALLICENCE 700 1- Marschner Horst Institut für Pflanzenernährung, Universität Hohenheim, D-70593, Stuttgart, Germany aut NATIONALLICENCE 700 1- Wallenda Thomas Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut NATIONALLICENCE 700 1- Schaeffer Christoph Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut NATIONALLICENCE 700 1- Einig Werner Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut NATIONALLICENCE 700 1- Wingler Astrid Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut NATIONALLICENCE 700 1- Hampp Rüdiger Physiologische Ökologie der Pflanzen, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher:wkap.nl/ 184/2(1996-06-01), 291-298 0032-079X 184:2<291 1996 184 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer