Postharvest organic matter removal effects on FH layer and mineral soil characteristics in four New Zealand Pinus radiata plantations

Smaill, Simeon J.; Clinton, Peter W.; Greenfield, L. G.

doi:10.1016/j.foreco.2008.05.001

Cited by 31 publications

(23 citation statements)

References 32 publications

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“…This agreed with various reports of reduced nutrient pools following the increased removal of organic matter at harvest (e.g. Bååth, 1980;Richter et al, 2000;Smaill et al, 2008). The projected effect of OMR regime selection on stem wood biomass production was minimal for the first two ro- …”

Section: Resultssupporting

confidence: 90%

“…Johnson, 1994;Ballard, 2000;Smaill et al, 2008), or soil microbial community biomass and activity (Smaill et al, 2010;Achat et al, 2015). Integration of this additional data would likely also see more variations arise between the different growth trajectories based on other regional differences.…”

Section: Regionmentioning

confidence: 99%

“…Harvesting methods used include stem only harvesting (SO), in which only stems are removed, and whole tree harvesting (WT), in which all above ground material is removed, but site preparation treatments can also result in the removal or disruption of the forest floor (FF), leaving bare mineral soil (Smaill et al, 2008). There is limited data available from long-term rotation length trials to assess the relative sustainability of these practices in New Zealand planted forests (Garrett et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Multi-rotation impacts of increased organic matter removal in planted forests

Smaill

Garrett

2016

J. Soil Sci. Plant Nutr.

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Organic matter cycling is critical to nutrient supply in forested ecosystems. Harvesting influences future nutrient supply by removing organic matter, but the extent of removal varies with harvesting methods. In New Zealand plantations there is little long-term data to help evaluate the relative impact of these methods on the sustainability of site productivity. To explore this issue a modelling study was initiated using the NuBalM platform to simulate the response of forest nitrogen (N) pools and the productivity of Pinus radiata D. Don to the consisten removal of different amounts of organic matter at harvest over multiple 30 year rotations across a range of growth trajectories. The harvesting method involving the greatest amount of organic matter removal (OMR) induced significant reductions in N pools and productivity by the end of the second rotation, while moderate OMR induced reductions by the end of the third rotation. Minimal OMR reduced N pools but not productivity by the end of the fourth rotation. This exploratory work suggests that management practices which influence the amount of organic matter on site can play an important role in long-term productivity and should be considered in further risk based management decision making.

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Section: Resultssupporting

confidence: 90%

Section: Regionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi-rotation impacts of increased organic matter removal in planted forests

Smaill

Garrett

2016

J. Soil Sci. Plant Nutr.

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“…Sweeney et al 2002;Sweeney & Czapka 2004;Geyer et al 2006), which identified herbicide treatments as more advantageous for plant growth, or at least no worse, than weed mats or similar physical barriers. The positive effect on growth associated with weed mats and, to a lesser extent, carpet rolls, may be the results of modification to the soil environment, as these materials also insulate the soil environment, potentially diminishing temperature fluctuations and increasing moisture availability (Smaill et al 2008). Alternately, the lack of substantial increases in growth rates with herbicide application may be the result of spray drift, but given the increased rates of seedling survival with herbicide application this is considered unlikely.…”

Section: Discussionmentioning

confidence: 99%

Establishing native plants in a weedy riparian environment

Smaill

Ledgard

Langer

et al. 2011

New Zealand Journal of Marine and Freshwater Research

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Riparian zones are important for influencing stream habitat and water quality. Efforts to populate these areas with native species are frequently hindered by fast-growing weed species. A trial was installed to examine riparian establishment alongside the Sherry River in the Motueka river catchment with seven native species and four weed-control treatments. After 2 years, herbicide use significantly improved seedling survival compared with the other weed-control treatments, but weed mats promoted greater seedling height and crown diameter growth. Seedling survival and growth varied significantly with species. After comparisons of costs and practical issues, weed mats were concluded to provide the most suitable weed control. Cordyline australis had the highest survival rate, developed the most crown area and performed well in terms of height increment; Pittosporum tenuifolium and Plagianthus regius also performed well. All three native species are recommended for use in further plantings at this and other similar locations.

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“…Globally, attention has been given to some site-establishment practices that have negative impacts on long-term site productivity (LTSP). Whole-tree harvesting has been reported to export more nutrients from sites than conventional harvesting (CH), where slash is retained, resulting in a decline in site productivity (Weber 1985;Olsson et al 1996;Hyvönen et al 2000;Egnell and Valinger 2003;Smaill et al 2008;Eisenbies et al 2009;Titshall et al 2013). The conventional harvesting method applied at Usutu involved removing tree stems with bark from sites but not slash (Crous et al 2007b) and is considered to have a less negative effect on site productivity than slash removal due to low nutrient content losses from stem wood (Mälkönen 1976;Olsson et al 1996;Wall 2012).…”

Section: Introductionmentioning

confidence: 99%

The importance of harvest residue and fertiliser on productivity of Pinus patula across various sites in their first, second and third rotations, at Usutu Swaziland

Mavimbela

Crous

Morris³

et al. 2018

N.Z. j. of For. Sci.

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Background: Concern is growing about the future of forestry productivity due to intensive nutrient removal, as a result of different harvesting operations. This study aimed to determine the effects on forest productivity when using different slash-retention scenarios with the recommended amounts of mineral fertiliser in Usutu forest. Usutu is a plantation forest that grows mostly softwood where the predominant species is Pinus patula Schiede ex Schltdl. & Cham.Methods: The first trial series (F) comprised of one trial located in each of five forest blocks. It was established in 1971 and compared the effects of various site preparation scenarios (slash removal, slash retention and cultivation) on the early growth of Pinus patula for adjacent first (F1R) and second rotation (F2R) sites (i.e. grassveld and clearfelled first-rotation sites). The second (S) trial series was re-established in April 1991 on exactly the same position as the first trial series, and involved second (S2R) and third rotation (S3R) sites. Three main treatments, standard pitting through harvest residue (control); manual pitting after removal of harvest residue and forest floor (cleared); and manual pitting and broadcast application of dolomitic lime (2 t ha

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Postharvest organic matter removal effects on FH layer and mineral soil characteristics in four New Zealand Pinus radiata plantations

Cited by 31 publications

References 32 publications

Multi-rotation impacts of increased organic matter removal in planted forests

Multi-rotation impacts of increased organic matter removal in planted forests

Establishing native plants in a weedy riparian environment

The importance of harvest residue and fertiliser on productivity of Pinus patula across various sites in their first, second and third rotations, at Usutu Swaziland

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