The long-term impacts of residue retention on soil quality, tree nutrition and productivity of an exotic pine (Pinus elliottii var.) plantation in southeast Queensland, Australia

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Author(s)
Tutua, Shane
Xu, Zhihong
Blumfield, Tim
Bubb, KA
Year published
2007
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A study was conducted to assess the long-term impacts of the on-site retention of residues following clear-felling on soil quality, tree nutrition and productivity of a second rotation F1 hybrid exotic pine, Pinus elliottii var., plantation. Soil was investigated for total carbon (C), total nitrogen (N), microbial biomass carbon (MBC), microbial nitrogen (MBN), hot-water extractable carbon (HWEC) and hot-water extractable total nitrogen (HWETN). Foliage and litter total N, P, K, Ca, Mg, and d13C and d15N isotopic compositions were determined. Results showed that soil organic matter quality, as indicated by the labile C and ...
View more >A study was conducted to assess the long-term impacts of the on-site retention of residues following clear-felling on soil quality, tree nutrition and productivity of a second rotation F1 hybrid exotic pine, Pinus elliottii var., plantation. Soil was investigated for total carbon (C), total nitrogen (N), microbial biomass carbon (MBC), microbial nitrogen (MBN), hot-water extractable carbon (HWEC) and hot-water extractable total nitrogen (HWETN). Foliage and litter total N, P, K, Ca, Mg, and d13C and d15N isotopic compositions were determined. Results showed that soil organic matter quality, as indicated by the labile C and N pools, was greater where harvest residues were retained. Residue retention also improved tree growth. However, foliar and litter analysis showed no significant differences in treatments, except for K and d 13C, which were positively correlated with tree diameter at breast height (DBH) (r2 = 0.67; p<0.005), suggesting greater water use and photosynthetic rates by trees where residues were retained.
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View more >A study was conducted to assess the long-term impacts of the on-site retention of residues following clear-felling on soil quality, tree nutrition and productivity of a second rotation F1 hybrid exotic pine, Pinus elliottii var., plantation. Soil was investigated for total carbon (C), total nitrogen (N), microbial biomass carbon (MBC), microbial nitrogen (MBN), hot-water extractable carbon (HWEC) and hot-water extractable total nitrogen (HWETN). Foliage and litter total N, P, K, Ca, Mg, and d13C and d15N isotopic compositions were determined. Results showed that soil organic matter quality, as indicated by the labile C and N pools, was greater where harvest residues were retained. Residue retention also improved tree growth. However, foliar and litter analysis showed no significant differences in treatments, except for K and d 13C, which were positively correlated with tree diameter at breast height (DBH) (r2 = 0.67; p<0.005), suggesting greater water use and photosynthetic rates by trees where residues were retained.
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Conference Title
Linking Local Management to Global Change Challenges: The Proceedings of the International Symposium on Forest Soils and Ecosystem Health
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© The Author(s) 2007. The attached file is posted here with permission of the copyright owners for your personal use only. No further distribution permitted. For information about this conference please refer to the publisher's website or contact the authors.