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Contribution of harvest residues to nutrient cycling in a tropical Acacia mangium Willd. pantation

Citation

Van Bich, N and Eyles, A and Mendham, D and Lam Dong, T and Ratkowsky, D and Evans, KJ and Dai Hai, V and Van Thanh, H and Van Thinh, N and Mohammed, C, Contribution of harvest residues to nutrient cycling in a tropical Acacia mangium Willd. pantation, Forests, 9, (9) Article 577. ISSN 1999-4907 (2018) [Refereed Article]


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Copyright 2018 the authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/f9090577

Abstract

Harvest residues can play a crucial role in conserving nutrients for recycling in forests, but little is known about the rates of decomposition and nutrient release from these residues following logging in tropical acacia plantations. In this study, we examined the biomass and nutrient content of harvest residue components (bark, leaves, and branches) using the litterbag technique for a 1.5-year-period following harvest of a seven-year-old Acacia mangium plantation in Northern Vietnam. At harvest, the total dry biomass of harvest residues was 18 t ha-1 comprising bark (8.9 t ha-1), branches (6.6 t ha-1), and leaves (2.5 t ha-1). The retained bark on site conserved 51% N, 29% P, 32% K, 64% Ca, and 24% Mg content from harvest residues for recycling. Decomposition rate of the leaves was the most rapid (k = 1.47 year-1; t0.5 = 0.47 year), then branches (k = 0.54 year-1; t0.5 = 1.29 year), and bark (k = 0.22 year-1; t0.5 = 3.09 year). During decomposition, the loss of nutrients from harvest residues was K ≈ Ca > N > P > Mg. Decomposition of harvest residues and the associated rate of nutrient release can potentially supply a significant amount of nutrients required for stand development in the next rotation.

Item Details

Item Type:Refereed Article
Keywords:nutrient loss, mass loss, nutrient release, nutrient dynamics, decay constant, residue half-life, nutrient cycling, tropical plantation
Research Division:Agricultural and Veterinary Sciences
Research Group:Forestry Sciences
Research Field:Forestry Management and Environment
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood Plantations
UTAS Author:Eyles, A (Dr Alieta Eyles)
UTAS Author:Ratkowsky, D (Dr David Ratkowsky)
UTAS Author:Evans, KJ (Associate Professor Katherine Evans)
UTAS Author:Mohammed, C (Professor Caroline Mohammed)
ID Code:128380
Year Published:2018
Web of Science® Times Cited:1
Deposited By:TIA - Research Institute
Deposited On:2018-09-17
Last Modified:2019-03-21
Downloads:75 View Download Statistics

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