A review of kowhai (Sophora spp.) and its potential for commercial forestry

Nguyen, Lisa; Bayne, Karen; Altaner, Clemens M.

doi:10.33494/nzjfs512021x157x

Cited by 2 publications

(5 citation statements)

References 22 publications

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“…Wardle 2011). Kōwhai can be propagated directly from seed or cuttings and are easily transplanted (L. Nguyen et al 2021).…”

Section: Native N-fixing Plantsmentioning

confidence: 99%

“…The nectar of S. microphylla is toxic to honeybees causing a narcotic effect which can be fatal and have significant impacts on hives (Clinch et al 1972). Kōwhai are not managed in New Zealand planted forests but their potential for commercial forestry is good based on their quality specialty timber and potential for plantation forestry (L. Nguyen et al 2021). Nguyen et al (2021) suggest that the residues could support a secondary industry such as a source of alkaloids for pharmaceutical applications.…”

Section: Native N-fixing Plantsmentioning

confidence: 99%

“…Kōwhai are not managed in New Zealand planted forests but their potential for commercial forestry is good based on their quality specialty timber and potential for plantation forestry (L. Nguyen et al 2021). Nguyen et al (2021) suggest that the residues could support a secondary industry such as a source of alkaloids for pharmaceutical applications. No research has been conducted on kōwhai silviculture (L. Nguyen et al 2021) or their impact on P. radiata productivity in mixed plantings.…”

Section: Native N-fixing Plantsmentioning

confidence: 99%

“…Nguyen et al (2021) suggest that the residues could support a secondary industry such as a source of alkaloids for pharmaceutical applications. No research has been conducted on kōwhai silviculture (L. Nguyen et al 2021) or their impact on P. radiata productivity in mixed plantings.…”

Section: Native N-fixing Plantsmentioning

confidence: 99%

“…A recent review highlights the potential of Sophora spp. for commercial forestry (L. Nguyen et al 2021). The role of Coriaria spp.…”

Section: Effects Of N-fixing Plants On Planted Forest Soil Fertility ...mentioning

confidence: 99%

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Use of nitrogen-fixing plants to improve planted forest soil fertility and productivity in New Zealand: A review

Reid,

Wigley,

Nusrath

et al. 2024

NZJFS

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Background: Planted forests with low fertility soils are likely to require increased inputs of nitrogen (N) to satisfy increasing productivity demands. The use of N fertilisers will become more challenging due to their increasing cost and the risk of unwanted environmental impacts. Nitrogen-fixing plants may provide an alternative option to chemical fertilisers that is not only cheaper but has a lower greenhouse gas footprint. Methods: Information on N-fixing plants was collated from available literature, focusing on species previously associated with planted forests as well as other exotic N-fixing trees and New Zealand native plants not used in commercial planted forests. Results: Benefits to planted forest growth in New Zealand by N-fixing plants have been proven in only a few cases. Lupinus arboreus Sims was used in the 1970s and 1980s to increase N inputs in a planted Pinus radiata D.Don coastal forest, and improved P. radiata productivity was demonstrated. Productivity gains ceased when a blight disease infected the lupin population. Many N-fixing plants have been shown to tolerate low fertility soils and establish in planted forests, but there is limited information on their N contribution to the soil, and whether this N contribution increases P. radiata productivity. Such N-fixing plants include Lotus species, clover (Trifolium species) and weeds such as gorse (Ulex europaeus L.) and broom (Cytisus scoparius (L.) Link), which are commonly found in association with P. radiata forests. New Zealand native N-fixing shrubs may be suitable but there is limited information available describing N-fixation or forestry management for native plant species. Conclusions: Nitrogen-fixing plants are a valuable resource, which when managed properly could be used for enhancing productivity. Issues with pests and disease, and limited knowledge regarding the management of N-fixing species, restricts adoption in planted forests. Well-designed research is needed to assess impacts on whole forest system N cycling as well as selection of appropriate plant species for use in planted forests without unintended consequences such as competition for soil moisture or light. This research needs to be integrated with forest management and delivered as practical options to ensure success.

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“…Wardle 2011). Kōwhai can be propagated directly from seed or cuttings and are easily transplanted (L. Nguyen et al 2021).…”

Section: Native N-fixing Plantsmentioning

confidence: 99%

Section: Native N-fixing Plantsmentioning

confidence: 99%

Section: Native N-fixing Plantsmentioning

confidence: 99%

Section: Native N-fixing Plantsmentioning

confidence: 99%

“…A recent review highlights the potential of Sophora spp. for commercial forestry (L. Nguyen et al 2021). The role of Coriaria spp.…”

Section: Effects Of N-fixing Plants On Planted Forest Soil Fertility ...mentioning

confidence: 99%

See 3 more Smart Citations

Use of nitrogen-fixing plants to improve planted forest soil fertility and productivity in New Zealand: A review

Reid,

Wigley,

Nusrath

et al. 2024

NZJFS

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Science, policy, and sustainable indigenous forestry in New Zealand

McGlone

Bellingham

Richardson

2022

NZJFS

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Background: Over 80% of New Zealand’s indigenous forests are in public ownership with logging prohibited, and logging of private indigenous forests is restricted to sustainable harvesting only. Such limitations are highly unusual globally and were imposed only in the last few decades of the 20th century. Previously, the national goal had been indigenous wood production in perpetuity. Here we review the role of forestry science in this outcome, and in particular in relation to the policies and practices adopted by the New Zealand Forest Service. Methods: Literature review Results: As early as 1900, it was recognised that economically viable management of indigenous forests for timber production was marginal at best. Nevertheless, the Forest Service, from its formation in 1919 to its abolition in 1987, advocated sustainable commercial management of indigenous forests. However, it failed to bring any significant areas under such management nor prevented conversion of substantial tracts of old-growth forest to exotic plantations or agriculture. Indigenous forest logging would have continued until commercial exhaustion of tall conifer species if a confluence of factors (urbanization, political upheaval, rise of an assertive conservation movement, and declining economic contribution) had not weakened the influence of provincial logging advocacy. Forestry research played a minor role in this saga as it focused on the technical issues of indigenous silviculture (e.g., coupe vs group vs single-tree harvesting methods) while the main drivers of change were economic, social, and cultural. Conclusions: Commercially valuable indigenous forests were protected only when the political cost of continuing logging was greater than that of halting it. However, it is an open question if the current policy settings will remain. Changes in governance (including increased Māori participation), land use change, planted indigenous forests and formation of exotic-indigenous forest communities will affect public attitudes as regards their use. If indigenous forestry science is to be of more consequence than in the past, New Zealand will need clear forestry goals and policies to deal with these changed circumstances, and the will to implement them.

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A review of kowhai (Sophora spp.) and its potential for commercial forestry

Cited by 2 publications

References 22 publications

Use of nitrogen-fixing plants to improve planted forest soil fertility and productivity in New Zealand: A review

Use of nitrogen-fixing plants to improve planted forest soil fertility and productivity in New Zealand: A review

Science, policy, and sustainable indigenous forestry in New Zealand

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