Yields of ten and eleven year-old hybrid poplars in the north central United States. Final report

Abstract

Plantations containing hybrid poplar clones DN34, DPI 7. c averaged greater than three dry tons per acre per year at year 10 and 1 1. Better sites averaged greater than four tons per acre per year. These unirrigated plantations were established in 1987 and 1988 during a record drought.

Biomass equations and carbon content of aboveground leafless biomass of hybrid poplar in Coastal British Columbia

“…The Netzer and Tolsted (1999) equation did not consistently over-or underestimate biomass, but there were large discrepancies between observed and predicted values in the higher DBH classes. Regression coefficients derived from this study for the model used by Netzer and Tolsted (1999) yielded a poor overall fit. Only DBH 2 contributed significantly to the equation, resulting in a simple linear equation with large overestimation in the lower DBH classes.…”

“…Use of this equation to predict biomass for the data from our study, resulted in overestimates of 60-3200 kg per tree. Tuskan and Rensema (1992) developed exponential equations for hybrid poplars in North Dakota; Netzer and Tolsted (1999) derived a parabolic equation for poplar in Minnesota and Wisconsin. Both forms describe non-linear data.…”

“…Standish et al (1985) tested several biomass prediction models for 22 commercial tree species in British Columbia, including both linear and non-linear equations based on diameter, height and volume. Poplar studies have also used linear (Lodhiyal and Lodhiyal, 1997;Scarascia-Mugnozza et al, 1997;Netzer and Tolsted, 1999) and exponential or logarithmic models (Tuskan and Rensema, 1992;Clendenen, 1996) to predict biomass accumulation. As the relationship between biomass and DBH was nonlinear ( Fig.…”

“…Heilman et al, 1994). Individual-tree equations for poplar have been published by several authors including Tuskan and Rensema (1992), Clendenen (1996), Lodhiyal and Lodhiyal (1997), Scarascia-Mugnozza et al (1997), Kort and Turnock (1999), and Netzer and Tolsted (1999); cf. Stanturf et al (2001).…”

Genetic and environmental effects on rooting ability of dormant unrooted hybrid poplar cuttings

“…Hybrid poplar has the potential to grow approximately 6-8 times faster than native aspen in the Lake States. Potential stand productivity of hybrid poplar is predicted to be between 3 -5 dry tons per acre per year, compared with native aspen potential stand productivity of 0.4 -0.7 dry tons per acre per year (Netzer et al 2002, Netzer and Tolsted 1999, Riemenschneider et al 2001).…”