NDLI: Leaf Litter Decomposition and Nutrient-Release Characteristics of Several Willow Varieties Within Short-Rotation Coppice Plantations in Saskatchewan, Canada

Content Provider	Springer Nature Link
Author	Hangs, R. D. Schoenau, J. J. Rees, K. C. J. Bélanger, N. Volk, T.
Copyright Year	2014
Abstract	Quantifying short-rotation coppice (SRC) willow leaf litter dynamics will improve our understanding of carbon (C) sequestration and nutrient cycling potentials within these biomass energy plantations and provide valuable data for model validation. The objective of this study was to quantify the decomposition rate constants (k $_{Biomass}$) and decomposition limit values (LV$_{Biomass}$), along with associated release rates (k $_{Nutrient}$) and release limits (LV$_{Nutrient}$) of nitrogen (N), phosphorus (P), potassium (K), sulphur (S), calcium (Ca), and magnesium (Mg) of leaf litter from several native and exotic willow varieties during an initial 4-year rotation at four sites within Saskatchewan, Canada. The k $_{Biomass}$, LV$_{Biomass}$, k $_{Nutrient}$, and LV$_{Nutrient}$ values varied among the willow varieties, sites, and nutrients, with average values of 1.7 year$^{−1}$, 79 %, 0.9 year$^{−1}$, and 83 %, respectively. Tissue N had the smallest k $_{Nutrient}$ and LV$_{Nutrient}$ values, whereas tissue K and Mg had the largest k $_{Nutrient}$ and LV$_{Nutrient}$ values, respectively. The leaf litter production varied among willow varieties and sites with an average biomass accumulation of 7.4 Mg ha$^{−1}$ after the 4-year rotation and associated C sequestration rate of 0.2 Mg C ha$^{−1}$ year$^{−1}$. The average contribution of nutrients released from leaf litter decomposition during the 4-year rotation to the plant available soil nutrient pool across varieties and sites was 22, 4, 47, 10, 112, and 18 kg ha$^{−1}$ of N, P, K, S, Ca, and Mg, respectively. Principal component analysis identified numerous key relationships between the measured soil, plant tissue, climate, and microclimate variables and observed willow leaf litter decomposition and nutrient-release characteristics. Our findings support the contention that SRC willow leaf litter is capable of enhancing both soil organic C levels and supplementing soil nutrient availability over time.
Starting Page	1074
Ending Page	1090
Page Count	17
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	7
Issue Number	4
e-ISSN	19391242
Language	English
Publisher	Springer US
Publisher Date	2014-03-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Decomposition limit value Decomposition rate constant Principal component analysis Salix Specific leaf area Plant Sciences Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Ecology Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Agronomy and Crop Science

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