caa a22 4500 463218035 CHVBK 20180405153203.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s11056-006-9033-4 doi (NATIONALLICENCE)springer-10.1007/s11056-006-9033-4 Steady-state nutrition of hybrid poplar grown from un-rooted cuttings [Elektronische Daten] [Lisa Zabek, Cindy Prescott] Fertilizing plantations of fast-growing tree crops, in manners which supply nutrients at rates that match plant demand and maintain stable internal plant nutrient ratios, can maximize biomass production and carbon sequestration while reducing fertilizer wastage and pollution. Our objectives were to determine nutrient ratios of common hybrid poplar (Populus trichocarpa Torr. and Gray×Populus deltoides Marsh.) (T×D) clones under steady-state nutrition, and to determine if incremental additions of fertilizer were more successful than conventional (evenly-split) fertilizer additions in maximizing biomass production and inducing stable nutrient ratios. Un-rooted cuttings of three T×D clones (49-177, DTAC-7, 15-29) were grown under a conventional regime and a modified-exponential fertilization regime at three application rates (1.8, 3.7 or 7.4gNplant−1). Above- and below-ground biomass and nutrient concentrations were measured after one growing season. There were few differences in total plant biomass between conventional and modified-exponential fertilization regimes, but for one clone, biomass accumulation equivalent to the highest rate under the conventional regime was achieved with the medium rate of the modified-exponential regime. Stable nutrient ratios (at conditions consistent with steady-state nutrition) were: 100N:14P:50K (49-177), 100N:13P:49K (DTAC-7) and 100N:12P:60K (15-29). Springer Science+Business Media, Inc., 2006 Populus trichocarpa × Populus deltoides nationallicence Hybrid poplar nationallicence Steady-state nutrition nationallicence Nutrient ratios nationallicence Zabek Lisa Department of Forest Sciences, Faculty of Forestry, University of British Columbia, 2424 Main Mall, V6T 1Z4, Vancouver, BC, Canada aut Prescott Cindy Department of Forest Sciences, Faculty of Forestry, University of British Columbia, 2424 Main Mall, V6T 1Z4, Vancouver, BC, Canada aut New Forests Kluwer Academic Publishers 34/1(2007-07-01), 13-23 0169-4286 34:1<13 2007 34 11056 https://doi.org/10.1007/s11056-006-9033-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11056-006-9033-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zabek Lisa Department of Forest Sciences, Faculty of Forestry, University of British Columbia, 2424 Main Mall, V6T 1Z4, Vancouver, BC, Canada aut NATIONALLICENCE 700 1- Prescott Cindy Department of Forest Sciences, Faculty of Forestry, University of British Columbia, 2424 Main Mall, V6T 1Z4, Vancouver, BC, Canada aut NATIONALLICENCE 773 0- New Forests Kluwer Academic Publishers 34/1(2007-07-01), 13-23 0169-4286 34:1<13 2007 34 11056 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer