Next Article in Journal
Impact of Shortened Winter Road Access on Costs of Forest Operations
Next Article in Special Issue
Productivity, Growth Patterns, and Cellulosic Pulp Properties of Hybrid Aspen Clones
Previous Article in Journal
Building a Social Discount Rate to be Applied in US Afforestation Project Appraisal
Previous Article in Special Issue
Overhead Protection Increases Fuel Quality and Natural Drying of Leaf-On Woody Biomass Storage Piles
Open AccessArticle

The Economics of Rapid Multiplication of Hybrid Poplar Biomass Varieties

GreenWood Resources 1500 SW 1st Avenue, Portland, OR 97201, USA
*
Author to whom correspondence should be addressed.
Forests 2019, 10(5), 446; https://doi.org/10.3390/f10050446
Received: 20 April 2019 / Revised: 18 May 2019 / Accepted: 21 May 2019 / Published: 23 May 2019
Background: Poplar (Populus spp.) hybridization is key to advancing biomass yields and conversion efficiency. Once superior varieties are selected, there is a lag in commercial use while they are multiplied to scale. Objective: The purpose of this study was to assess the influence of gains in biomass yield and quality on investment in rapid propagation techniques that speed the time to commercial deployment. Material and Methods: A factorial experiment of propagation method and hybrid variety was conducted to quantify the scale-up rate of in vitro and greenhouse clonal multiplication. These data were used in modeling the internal rate of return (IRR) on investment into rapid propagation as a function of genetic gains in biomass yield and quality and compared to a base case that assumed the standard method of supplying operational varieties in commercial quantities from nurseries as hardwood cuttings, capable of yields of 16.5 Mg ha−1 year−1. Results: Analysis of variance in macro-cutting yield showed that propagation method and varietal effects as well as their interaction were highly significant, with hedge propagation exceeding serial propagation in macro-cutting productivity by a factor of nearly 1.8. The Populus deltoides × P. maximowiczii and the Populus trichocarpa × P. maximowiczii varieties greatly exceeded the multiplication rate of the P. × generosa varieties due to their exceptional response to repeated hedging required to initiate multiple tracks of serial propagation. Analyses of investment into rapid propagation to introduce new material into plantation establishment followed by a 20-year rotation of six coppice harvests showed that gains in biomass yield and quality are warranted for a commitment to rapid propagation systems. The base case analysis was generally favored at yields up to 18 Mg−1 year−1 dependent on pricing. The rapid multiplication analysis proved superior to the base case analysis at the two highest yield levels (27.0 and 31.5 Mg ha−1 year−1,) at all price levels and at yields of 22.5 Mg−1 year−1, dependent on price and farm location. Conclusion: Rapid multiplication is a reliable method to move improved plant material directly into operations when valued appropriately in the marketplace. View Full-Text
Keywords: hybrid poplar; genetic improvement; clonal propagation; biofuels; renewable energy hybrid poplar; genetic improvement; clonal propagation; biofuels; renewable energy
Show Figures

Figure 1

MDPI and ACS Style

Stanton, B.J.; Haiby, K.; Gantz, C.; Espinoza, J.; Shuren, R.A. The Economics of Rapid Multiplication of Hybrid Poplar Biomass Varieties. Forests 2019, 10, 446.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop