Reed Canary Grass for Energy in Sweden: Yields, Land-Use Patterns, and Climatic Profile

Blas Mola-Yudego,Oskar Englund,Xiaoqian Xu,Ioannis Dimitriou

doi:10.3390/f12070897

Blas Mola-Yudego, Oskar Englund + Show 2 more

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https://doi.org/10.3390/f12070897

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Abstract

Research Highlights: (1) Reed canary grass (RCG) is analysed in Sweden compared to willow and poplar for 2001–2020. (2) Each crop presents a different land-use and climatic profile. (3) Average yield records of RCG are similar to willow and poplar. (4) There are divergences between trial-based and commercial yields. (5) Existing land-use change patterns suggest meadow > RCG and RCG > cereal. (6) RCG land area is very sensitive to policy incentives. Background and objectives: RCG is an alternative crop for biomass-to-energy due to high yield and frost tolerance. We assess the cultivation in Sweden by using an extensive compilation of data, with emphasis on the extent of the cultivation, climatic profile, land-use patterns, and productivity. Material and methods: RCG plantations are analysed for 2001–2020. A geostatistical analysis is performed to characterize where it is cultivated and the land uses associated. Climatic, productivity, and yield profiles are compared to willow and poplar plantations from experiments and from commercial plantations. Results: The results show that the cultivation of RCG expanded after 2005, with a maximum of 800 ha in 2009, to then decrease to the current levels of about 550 ha. It is mainly grown in colder climatic areas, with lower agricultural productivity than willow and poplar. Mean yields from trials are 6 oven dry tonnes (odt) ha−1 year−1; commercial yields are 3.5 odt ha−1 year−1. RCG replaces meadow land and then is replaced by cereals when abandoned. Conclusions: RCG is an interesting alternative with similar yields (commercial and trials) as other energy crops, but its success is more sensitive to policy incentives.

Highlights

IntroductionPerennial grasses have been considered as promising energy crops due to several characteristics that make them attractive for intensive biomass production compared to annual crops, i.e., high yield potential, high lignin and cellulose contents in their biomass, high heating value, low water content, lower management inputs such as soil tillage, and others [1]
reed canary grass (RCG) is an alternative crop for biomass-to-energy due to high yield and frost tolerance
RCG is an interesting alternative with similar yields as other energy crops, but its success is more sensitive to policy incentives

Summary

Introduction

Perennial grasses have been considered as promising energy crops due to several characteristics that make them attractive for intensive biomass production compared to annual crops, i.e., high yield potential, high lignin and cellulose contents in their biomass, high heating value, low water content, lower management inputs such as soil tillage, and others [1]. They offer advantages compared to perennial trees for energy since they do not need special equipment for management practices and can use common existing equipment for annual crops. In the 1980s, research was performed aiming to grow RCG as an alternative biomass source for the pulp industry [16]

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