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A review of kowhai (Sophora spp.) and its potential for commercial forestry kowhai(Sophora spp.)及其商业林业潜力综述
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2021-07-22 DOI: 10.33494/NZJFS512021X157X
Lisa Nguyen, K. Bayne, C. Altaner
Background: Demand for imported sawn timbers in New Zealand has increased over the last decade, reflecting the lack of New Zealand-grown, naturally durable timber in the domestic market. Therefore, a market opportunity exists for sustainably grown, naturally durable timbers in New Zealand for specialty applications. Kowhai (Sophora spp.) are New Zealand native tree species, known for their bright, yellow flowers and reported to produce coloured, naturally durable heartwood.Methods: Information on kowhai was collated from literature, focusing on their potential for commercial forestry. The taxonomic relationships, species descriptions, establishment, and growth rates of kowhai were examined, along with timber properties and historical uses, as well as medicinal applications. The review identified potential market opportunities for kowhai and key areas for further research.Results: Kowhai refers to eight different Sophora species that are endemic to New Zealand. Kowhai is easily established and the different species hybridise readily. While growth and form of kowhai varies with species, site, and management, examples of straight single-stemmed trees and annual diameter increments exceeding 20 mm have been found. Kowhai timber properties might be comparable to those of teak (Tectona grandis L.f.). Kowhai contains alkaloids, a class of compounds used in pharmaceutical applications. The species have been used for timber and traditional medicine by Maori in the past, while European settlers used kowhai for their durable and flexible timber.Conclusions: Kowhai could be established as a sustainable, domestic source of high-quality timber and substitute imported specialty timbers in New Zealand on account of their natural durability, strength, stiffness, colour, and density properties. The residues could support a secondary industry, as a source of alkaloids for pharmaceutical applications or natural dyes. Key areas that require further study include growth rates and silviculture, mechanical timber properties, machining/processing characteristics, natural durability and cytisine levels in kowhai, as well as the cultural, economic, and ecological framework required for a commercial kowhai forestry industry. Lack of literature on, and expertise in the use of native timbers in general are barriers to promoting native species for commercial forestry in New Zealand.
背景:过去十年来,新西兰对进口锯材的需求有所增加,这反映出国内市场缺乏新西兰种植的天然耐用木材。因此,在新西兰,可持续生长、天然耐用的木材具有特殊应用的市场机会。Kowhai(Sophora spp.)是新西兰本土树种,以其明亮的黄色花朵而闻名,据报道可生产彩色、天然耐用的心材。方法:从文献中整理考海的信息,重点探讨考海在商业林业中的潜力。研究了科海的分类关系、物种描述、建立和生长速度,以及木材特性和历史用途,以及药物应用。该综述确定了科海的潜在市场机会和进一步研究的关键领域。结果:Kowhai指的是新西兰特有的八种不同的Sophora。Kowhai很容易建立,不同物种也很容易杂交。虽然kowhai的生长和形态因物种、地点和管理而异,但已经发现了直单茎树和年直径增量超过20毫米的例子。Kowhai木材的特性可能与柚木相当。Kowhai含有生物碱,这是一类用于制药的化合物。该物种过去曾被毛利人用于木材和传统医药,而欧洲定居者则使用kowhai作为耐用和灵活的木材。结论:由于其天然耐久性、强度、硬度、颜色和密度特性,Kowhai可以成为新西兰可持续的国内优质木材来源,并替代进口特种木材。这些残留物可以支持第二产业,作为药用生物碱或天然染料的来源。需要进一步研究的关键领域包括科海的生长率和造林、木材机械性能、机械加工/加工特性、自然耐久性和胞苷水平,以及商业科海林业所需的文化、经济和生态框架。在新西兰,缺乏关于使用本土木材的文献和专业知识是促进本土物种用于商业林业的障碍。
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引用次数: 1
Implications of ectomycorrhizal inoculation for drought stress tolerance of Atlas cedar (Cedrus atlantica (Endl.) Carrière) seedlings 外生菌根接种对阿特拉斯雪松(Cedrus atlantica, Endl.)耐旱性的影响卡里埃)幼苗
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2021-07-09 DOI: 10.33494/NZJFS512021X131X
Hamida Gaba Chahboub, Mohamed Sghir Lamhamedi, O. Abrous-Belbachir
Background: Ectomycorrhizal inoculation is a promising strategy to minimise the initial transplant shock and increase plant survival and growth during the first years of out-planting in the field. The aim of this research was to investigate the effect of sporal inoculum of three ectomycorrhizal fungi: Cortinarius cedretorum, Amanita vaginata and Inocybe geophylla on tolerance levels of Atlas cedar (Cedrus atlantica (Endl.) Carrière) seedlings subjected to applied drought stress in nursery conditions.Methods: Carpophores, seeds and organic forest soil were collected under pure stands of Atlas cedar. After fifteen months of growth, seedlings were subjected to drought stress by withholding water for thirty days; we assessed morphological and physiological variables of all seedling batches (inoculated and uninoculated, controlled and stressed seedlings)Results: All roots of inoculated stressed seedlings were mycorrhizal. The mycorrhization rates were 67%, 64.6% and 53.6% for stressed seedlings inoculated with Cortinarius cedretorum, Amanita vaginata, Inocybe geophylla, respectively. This root mycorrhization was accompanied by a significant improvement in seedling growth, especially height and length of the main root (10.2 cm, 52 cm) reached in stressed seedlings inoculated with Cortinarius cedretorum. There was a significant increase in relative water content, total chlorophyll, carotenoids, soluble sugars and starch, superoxide dismutase and ascorbate peroxydase enzyme activities in inoculated stressed seedlings compared with uninoculated seedlings.Conclusions: Inoculation of Atlas cedar seedlings with spores of ectomycorrhizal fungi remains a very effective alternative for improving growth and the morphological and physiological status of seedlings under drought conditions. Cortinarius cedretorum appears to be consistently advantageous followed by Amanita vaginata and Inocybe geophylla.
背景:外生菌根接种是一种很有前途的策略,可以最大限度地减少最初的移植冲击,并在田间种植的头几年提高植物的存活率和生长。本研究的目的是研究三种外生菌根真菌:Cortinarius cedretorum、Amanita vaginata和Inocybe geophylla的孢子接种物对阿特拉斯雪松(Cedrus atlantica(Endl.)Carrière)幼苗在苗圃条件下承受干旱胁迫的耐受水平的影响。方法:在阿特拉斯雪松纯林下采集载体、种子和有机林地土壤。在生长15个月后,幼苗通过保持水分30天而受到干旱胁迫;我们评估了所有幼苗批次(接种和未接种、对照和胁迫幼苗)的形态和生理变量。结果:接种胁迫幼苗的所有根都是菌根。用Cortinarius cedretorum、Amanita vaginata和Inocybe geophylla接种胁迫幼苗的菌根化率分别为67%、64.6%和53.6%。这种根菌根伴随着幼苗生长的显著改善,特别是在接种了玉髓的胁迫幼苗中,主根的高度和长度(10.2厘米,52厘米)达到了显著改善。与未接种的幼苗相比,接种胁迫的幼苗的相对含水量、总叶绿素、类胡萝卜素、可溶性糖和淀粉、超氧化物歧化酶和抗坏血酸过氧化物酶活性显著增加。结论:在干旱条件下,用外生菌根真菌孢子接种阿特拉斯雪松幼苗对于改善幼苗的生长和形态生理状况仍然是一种非常有效的选择。Cortinarius cedretorum似乎一直是有利的,其次是Amanita vaginata和Inocybe geophylla。
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引用次数: 0
Preussner functions for volume estimation of Pinus taeda L. in Southern Brazil 巴西南部火炬松体积估算的Preussner函数
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2021-06-02 DOI: 10.33494/NZJFS512021X66X
F. R. Stefanello, S. P. Netto, A. Behling, A. Pelissari, G. Orso
Background: Taper modelling and volume estimation are key procedures in the management and planning of plantedforests. The objective of this work was to evaluate the taper and volume behaviour of Pinus taeda L. species, along the stemin different ages, using the Preussner taper functions, compared to Schöpfer’s 5th-polynomial, Kozak’s and Max-Burkhart’smodels. This work focused on plantations of Pinus taeda L., due to its wide use as a source of raw material in the forestindustry of southern Brazil.Methods: The data were collected in the last 22 years from the Midwest region of Santa Catarina, of trees ranging in agefrom 3.5 to 18 years. This dataset consisted of a collection of volume sections, with relative diameter measurements alongthe stem, used in conventional forest inventory. The total volume of the trees, obtained by integrating the Preussner taperfunctions, was equated by dividing the stem into four parts, in which parabolas were fitted, and compared with the totaland merchantable volume estimated by Schöpfer’s 5th-degree polynomial, Kozak’s and Max-Burkhart’s functions.Results: Bias, RMSE and r were generally better with the application of Kozak’s model, and AIC and BIC for the Preussner’smodel.Conclusions: Kozak functions were better to provide the merchantable volume. In terms of total volume both functions,Kozak and Preussner, provided reliable estimates. The advantage of the procedure proposed by Preussner is the flexibilityof the fitted taper functions, the simplicity of volume calculations by integration, and the feasibility for interpreting theircoefficients.
背景:锥形建模和体积估计是种植林管理和规划的关键程序。本工作的目的是使用Preussner锥函数,与Schöpfer的第五多项式、Kozak和Max-Burkhart的模型相比,评估不同年龄火炬松物种沿树干的锥度和体积行为。由于火炬松在巴西南部的林业中被广泛用作原材料来源,这项工作的重点是火炬松人工林。该数据集由一组体积剖面组成,沿着树干进行相对直径测量,用于传统的森林清查。通过积分Preussner锥函数获得的树木总体积通过将树干分为四部分来等式,其中拟合了抛物线,并与Schöpfer的五次多项式、Kozak和Max Burkhart的函数估计的总体积和可销售体积进行了比较。结果:应用Kozak模型和Preussner模型的AIC和BIC,Bias、RMSE和r总体上较好。就总体积而言,Kozak和Preussner这两个函数都提供了可靠的估计。Preussner提出的程序的优点是拟合锥函数的灵活性,通过积分进行体积计算的简单性,以及解释其系数的可行性。
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引用次数: 0
Effects of site and tree size on wood density and bark properties of Lebombo ironwood (Androstachys johnsonii Prain) 立地和树径对铁木木材密度和树皮特性的影响
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2021-04-14 DOI: 10.33494/NZJFS512021X32X
Tarquinio Mateus Magalhães
Background: Wood and bark are important renewable natural resources. Density is an important property that is used to describe wood and bark quality for a number of end uses. However, wood and bark density, bark proportion and dimensions vary with age and site, as well as among and within trees. The aim of this study was to investigate the effect of site, diameter class, and vertical position within the stem on the density of wood and bark, bark volume, bark dry-mass and thickness of Lebombo ironwood (Androstachys johnsonii Prain).Methods: The study was conducted on 93 Lemombo ironwood trees growing in Mozambique. Eight discs were sampled from each selected tree and diameter over and under bark was measured. Bark thickness, bark mass and bark density were determined along with the basic wood density of each disc.Results: The overall average whole-stem properties were estimated at: 786 kg m–3 wood density, 586 kg m–3 bark density, 19% bark volume, 19% bark dry-mass, and 9 mm bark thickness. Height level uniquely explained most of the variation in bark mass (97%), bark volume (95%) and wood density (86%). Diameter class explained most of the variation in bark density (51%) and bark thickness (51%). Site only explained a small proportion of the variation in all dependent variables.Conclusions: Overall, the patterns of variation of all wood and bark properties were highly dependent on tree diameter class and vertical position within the stem. Site differences were not a significant source of variation in the properties studied. Improved knowledge of the wood and bark properties of this species will aid its sustainable management and utilisation.
背景:木材和树皮是重要的可再生自然资源。密度是一个重要的属性,用于描述木材和树皮的质量,用于许多最终用途。然而,木材和树皮密度、树皮比例和尺寸随树龄和地点、树木之间和树木内部而变化。摘要本文研究了林分、径级和茎内垂直位置对铁木木皮密度、树皮体积、树皮干质量和树皮厚度的影响。方法:对生长在莫桑比克的93棵Lemombo铁树进行了研究。从每棵选定的树上取样8个圆盘,测量树皮上和树皮下的直径。测定树皮厚度、树皮质量和树皮密度,同时测定各组片的基本木材密度。结果:总体平均全茎特性估计为:786 kg m-3木材密度,586 kg m-3树皮密度,19%树皮体积,19%树皮干质量和9 mm树皮厚度。高度水平唯一地解释了树皮质量(97%)、树皮体积(95%)和木材密度(86%)的大部分变化。直径等级解释了树皮密度(51%)和树皮厚度(51%)的大部分变化。Site只解释了所有因变量变化的一小部分。结论:总体而言,所有木材和树皮性质的变化模式高度依赖于树的直径、类别和茎内的垂直位置。地点差异并不是研究性状变异的重要来源。提高对该树种木材和树皮特性的了解将有助于其可持续管理和利用。
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引用次数: 1
Evaluating basic density calibrations based on NIR spectra recorded on the three wood faces and subject to different mathematical treatments 基于三种木材表面记录的近红外光谱,并进行不同的数学处理,评估基本密度校准
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2021-02-17 DOI: 10.33494/NZJFS512021X100X
Evelize Aparecida Amaral, Luana Maria dos Santos, P. R. Hein, Emylle Veloso Santos Costa, S. C. S. Rosado, P. F. Trugilho
Background: Near infrared (NIR) spectroscopy has been successfully applied to estimate the chemical, physical and mechanical properties of various biological materials, including wood. This study aimed to evaluate basic density calibrations based on NIR spectra collected from three wood faces and subject to different mathematical treatments.Methods: Diffuse reflectance NIR spectra were recorded using an integrating sphere on the transverse, radial and tangential surfaces of 278 wood specimens of Eucalyptus urophylla x Eucalyptus grandis. Basic density of the wood specimens was determined in the laboratory by the immersion method and correlated with NIR spectra by Partial Least Squares regression. Different statistical treatments were then applied to the data, including Standard Normal Variate, Multiplicative Scatter Correction, First and Second Derivatives, Normalization, Autoscale and MeanCenter transformations.Results: The predictive model based on NIR spectra measured on the transverse surface performed the best (R²cv = 0.85 and RMSE = 25.5 kg/m³) while the model developed from the NIR spectra measured on the tangential surface had the poorest performance (R²cv = 0.53 and RMSE = 46.8 kg/m³). The difference in performance between models based on original (untreated) and mathematically-treated spectra was minimal.Conclusions: Multivariate models fitted to NIR spectra were found to be efficient for predicting the basic density of Eucalyptus wood, especially when based on spectra measured on the transversal surface. For this data set, models based on the original spectra and mathematically treated spectra had similar performance. The reported findings show that mathematical transformations are not always able to extract more information from the spectra in the NIR.
背景:近红外(NIR)光谱已经成功地应用于评估各种生物材料的化学、物理和机械性能,包括木材。本研究的目的是评估基于三种木材表面近红外光谱的基本密度校准,并进行不同的数学处理。方法:采用积分球法对278株尾巨桉(Eucalyptus urophylla x Eucalyptus grandis)木材样品的横向、径向和切向漫反射近红外光谱进行记录。在室内用浸渍法测定了木材试样的基本密度,并用偏最小二乘回归与近红外光谱进行了相关性分析。然后对数据进行不同的统计处理,包括标准正态变量、乘法散点校正、一阶导数和二阶导数、归一化、Autoscale和MeanCenter转换。结果:基于横向表面近红外光谱的预测模型效果最好(R²cv = 0.85, RMSE = 25.5 kg/m³),而基于切向表面近红外光谱的预测模型效果最差(R²cv = 0.53, RMSE = 46.8 kg/m³)。基于原始(未经处理)和数学处理的光谱的模型之间的性能差异很小。结论:拟合近红外光谱的多变量模型可以有效地预测桉树木材的基本密度,特别是基于横向表面测量的光谱。对于该数据集,基于原始光谱和经过数学处理的光谱的模型具有相似的性能。研究结果表明,数学变换并不总是能够从近红外光谱中提取更多的信息。
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引用次数: 3
Species-specific basic stem-wood densities for twelve indigenous forest and shrubland species of known age, New Zealand 新西兰已知年龄的12种土著森林和灌木林物种的特定物种基本树干木材密度
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2021-02-15 DOI: 10.33494/NZJFS512021X121X
M. Marden, S. Lambie, L. Burrows
Background: Tree carbon estimates for New Zealand indigenous tree and shrub species are largely based on mean basic stem-wood densities derived from a limited number of trees, often of unspecified age and from a limited number of sites throughout New Zealand. Yet stem-wood density values feed directly into New Zealand’s international and national greenhouse gas accounting. We augment existing published basic stem-wood density data with new age-specific values for 12 indigenous forest and shrubland species, including rarely obtained values for trees <6-years old, across 21 widely-distributed sites between latitudes 35° and 46° S, and explore relationships commonly used to estimate carbon stocks.Methods: The volume of 478 whole stem-wood discs collected at breast height (BH) was determined by water displacement, oven dried, and weighed. Regression analyses were used to determine possible relationships between basic stem-wood density, and tree height, root collar diameter (RCD), and diameter at breast height (DBH). Unbalanced ANOVA was used to determine inter-species differences in basic stem-wood density in 5-yearly age groups (i.e. 0–5 years, 6–10 years etc.) (P<0.05). As specific taxa of Kunzea ericoides (Myrtaceae) has only been identified at some study sites we combine the data from each site, and use the term Kunzea spp. We compare our age- and species-specific results with existing published data where age is specified versus non-age-specific values.Results: Kunzea spp. and Leptospermum scoparium exhibited positive correlations between basic stem-wood density and tree height, RCD, and DBH. No relationships were established for Melicytus ramiflorus, Coprosma grandiflora, Weinmannia racemosa ?6-years old, or for Podocarpus totara, Agathis australis, Vitex lucens, and Alectryon excelsus <6-years old. Dacrydium cupressinum and Prumnopitys ferruginea <6-years old exhibited a significant positive relationship with DBH only, while for Dacrycarpus dacrydioides, each correlation was negative. Irrespective of age, basic stem-wood density is not different between the hardwood species L. scoparium and Kunzea spp. but is significantly greater (P=0.001) than that of the remaining, and predominantly softwood species of equivalent age. For Kunzea spp., L. scoparium, Coprosma grandiflora, Weinmannia racemosa, and Melicytus ramiflorus ?6-years old there was no evidence that basic stem-wood density increased with tree age, and values were within the range of published and unpublished data. For naturally reverting stands of Kunzea spp. located between latitudes 35° to 46° S, basic stem-wood density values tended to increase with decreased elevation and increased temperature.Conclusions: Increasing basic wood density values in Kunzea spp. with decreased elevation and increased temperature suggest that where local data are available its use would improve the accuracy of biomass estimates both locally and nationally. Furthermore, refining biomass estimates for e
背景:新西兰本土树木和灌木物种的树木碳估计主要基于新西兰各地数量有限的树木(通常年龄不详)和数量有限的地点的平均基本树干木材密度。然而,树干木材密度值直接反映在新西兰的国际和国家温室气体核算中。我们用12种本土森林和灌木林物种的新的年龄特异性值来扩充现有已发表的基本树干密度数据,包括在北纬35°至46°之间的21个广泛分布的地点中很少获得的6岁以下树木的值,并探索通常用于估计碳储量的关系。方法:采用水置换、烘干和称重的方法,测定478个全茎木盘的体积。回归分析用于确定基本树干木材密度与树高、根颈直径(RCD)和乳高直径(DBH)之间的可能关系。非平衡方差分析用于确定5年年龄组(即0–5岁、6–10岁等)基本树干木材密度的种间差异(P<0.05)。由于只有在一些研究地点才确定了杨梅科的特定分类群,我们将每个研究地点的数据结合起来,并使用了Kunzea spp。我们将我们的年龄和物种特异性结果与现有公布的数据进行比较,其中年龄是特定的,而非年龄特异性值。结果:Kunzea spp.和Leptispermum scoparium基本树干密度与树高、RCD和DBH呈正相关。没有建立任何关系的梅,Coprosma grandiflora,Weinmania racemosa?6岁,或对于小于6岁的罗汉松、澳大利亚玛瑙、葡萄和亚历山大松。小于6岁的铜针布和铁针布仅与DBH呈显著正相关,而涤纶针布则呈负相关。无论年龄如何,硬木物种L.scoparium和Kunzea spp.之间的基本树干木材密度没有差异。但明显大于(P=0.001)其余的,主要是同等年龄的软木物种。对于Kunzea spp.、L.scopearium、Coprosma grandiflora、Weinmania racemosa和Melicytus ramiflorus?6岁时,没有证据表明基本树干木材密度随树龄增加,其值在已发表和未发表的数据范围内。对于位于北纬35°至46°之间的Kunzea spp.自然恢复林分,基本树干木材密度值往往随着海拔降低和温度升高而增加。结论:Kunzea spp.的基本木材密度值随着海拔的降低和温度的升高而增加,这表明在有当地数据的地方,使用这些数据将提高当地和全国生物量估计的准确性。此外,完善现有混合软木物种群落、再生灌木林和本土物种新种植的生物量估计,将需要额外的基本树干密度值,以从树干体积扩展到总林分生物量。
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引用次数: 0
Trade-offs between environmental and economic factors in conversion from exotic pine production to natural regeneration on erosion prone land. 在易受侵蚀的土地上,从外来松树生产转向自然再生的环境和经济因素之间的权衡。
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2021-01-01 DOI: 10.33494/nzjfs512021x163x
Suzanne M Lambie, Shaun Awatere, Adam Daigneault, Miko U F Kirschbaum, Michael Marden, Tarek Soliman, Raphael I Spiekermann, Patrick J Walsh

Background: Some of New Zealand's exotic pine (Pinus radiata D.Don) forests were planted for erosion mitigation but cultural, legislative, environmental, and profitability limitations in some parts of the landscape have led to reassessment of their suitability. There is limited information to support landowner decisions on the viability of natural regeneration of native forest post-pine-harvest.

Methods: We evaluated scenarios of post-harvest natural regeneration, compared to remaining in pine production, using erosion susceptibility determined from historical occurrence of landslides, gullies and earthflows, biophysical growth modelling of mānuka-kānuka (Leptospermum scoparium-Kunzea ericoides (A.Rich) Joy Thomps.) shrubland using the process-based CenW model, and cost-benefit analyses using NZFARM with two land use change scenarios, at two levels of erosion mitigation ± honey profits.

Results: In our study area, the Gisborne Region (North Island of New Zealand), ~27% of the land has moderate-very high susceptibility to landslides, 14-22% a high probability of contributing material to waterways, and 19% moderate-very high gully erosion susceptibility. Pines grow 10 times faster than naturally regenerating mānuka-kānuka shrubland, but mānuka-kānuka is used for honey not wood production. Natural regeneration resulted in losses of $150-250 ha-1 yr-1 compared to the current profitability of pine production. Honey production offset some reduction in pine revenue, but not fully. Thus, the viability of shifting from pines to native forest is highly dependent on landowner impetus and value for non-market ecosystem services (such as cultural and biodiversity values) provided by native forest.

Conclusions: A mosaic of land uses within a property may sufficiently offset income losses with other benefits, whereby highly erosion-prone land is shifted from rotational pine forest production to permanent native forest cover with honey production where possible. At the regional scale in Gisborne, the conversion of the most highly susceptible land under production forestry (315-556 ha) to natural regeneration has the potential for wider benefits for soil conservation reducing erosion by 1-2.5 t yr-1 of sediment facilitating achievement of cleaner water aspirations and habitat provision.

背景:新西兰种植了一些外来松林(Pinus radiata d.d don)以缓解侵蚀,但在景观的某些部分,文化、立法、环境和盈利能力的限制导致了对其适用性的重新评估。支持土地所有者关于松林采伐后天然林自然再生可行性的决定的信息有限。方法:我们评估了采收后自然更新的情景,与保留的松树生产相比,使用从滑坡、沟和泥石流的历史发生情况确定的侵蚀敏感性,使用基于过程的CenW模型对mānuka-kānuka (Leptospermum scoparium-Kunzea ericoides (A.Rich) Joy Thomps.)灌木丛进行生物物理生长建模,并使用NZFARM对两种土地利用变化情景进行成本效益分析,在两个侵蚀缓解±蜂蜜利润水平下。结果:在我们的研究区域,吉斯伯恩地区(新西兰北岛),~27%的土地具有中等-非常高的滑坡易感性,14-22%的土地具有高概率的水道贡献物质,19%的土地具有中等-非常高的沟壑侵蚀易感性。松树的生长速度比自然再生的mānuka-kānuka灌木丛快10倍,但mānuka-kānuka用于生产蜂蜜而不是木材。与目前松树生产的盈利能力相比,自然再生造成每年150-250美元的损失。蜂蜜产量抵消了一些松树收入的减少,但不是全部。因此,从松林转向原生林的可行性在很大程度上取决于土地所有者的动力和原生林提供的非市场生态系统服务(如文化和生物多样性价值)的价值。结论:一个财产内的土地使用马赛克可以充分抵消收入损失和其他利益,因此,高度易侵蚀的土地从轮作松林生产转移到永久的原生森林覆盖,并在可能的情况下生产蜂蜜。在吉斯伯恩的区域范围内,将最易受影响的生产性林业土地(315-556公顷)转变为自然再生,可能会对土壤保持产生更广泛的好处,每年减少1-2.5吨的沉积物侵蚀,促进实现更清洁的水的愿望和提供栖息地。
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引用次数: 7
Flight activity of wood- and bark-boring insects at New Zealand ports 新西兰港口木材和树皮蛀虫的飞行活动
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2020-12-23 DOI: 10.33494/nzjfs502020x132x
S. Pawson, J. L. Kerr, C. Somchit, C. Wardhaugh
Background: Bark- and wood-boring forest insects spread via international trade. Surveys frequently target new arrivals to mitigate establishment. Alternatively, monitoring pest activity in exporting countries can inform arrival and establishmentrisk. Methods: We report >3 years data from daily sampling of bark- and wood-boring insects that are associated with recently felled Pinus radiata D.Don at five New Zealand ports. Results: Average catch differed between ports and months with Arhopalus ferus (Mulsant), Hylurgus ligniperda F., and Hylastes ater (Paykull) comprising 99.6% of the total catch. Arhopalus ferus was absent during winter with Hylastes ater and Hylurgus ligniperda activity between June and August representing 3.5 and 3.7% of total catch, respectively. Maximum temperature and wind speed influenced flight activity of all three species but not universally across all ports. Flight activity transitioned to a nonlinear pattern above 20°C. Arhopalus ferus has a unimodal flight risk period between late-September and late-April. Hylastes ater was also unimodal except in Dunedin where it was bimodal like Hylurgus ligniperda was in all regions with spring and mid- to late-summer activity periods. Although Hylastes ater was observed during winter, the probability of a flight event during winter was between 0 and 0.02 per week. Hylurgus ligniperda flight probability was zero in Dunedin and low at all other ports from May  to August. Conclusions: Modelling seasonal changes in flight probability can inform risk-based phytosanitary measures. We demonstrate the utility of maximum temperature and seasonality as a predictor of wood commodity infestation risk. Such predictors allow National Plant Protection Organisations to develop standards that protect the post-treatment phytosanitary security of individual consignments.
背景:树皮和木材蛀虫通过国际贸易传播。调查经常以新移民为目标,以减轻建制。另外,在出口国监测有害生物活动可以为入境和确定风险提供信息。方法:我们报告了在新西兰五个港口对最近被砍伐的辐射松(Pinus radiata d.d don)相关的树皮和木材蛀虫的每日采样数据。结果:不同港口和月份的平均捕获量不同,其中ferus Arhopalus (Mulsant)、Hylurgus ligniperda F.和hyllastater (Paykull)占总捕获量的99.6%。在冬季,黑桫椤(Arhopalus ferus)不存在,6 ~ 8月,黑桫椤(Hylastes ater)和木叶桫椤(Hylurgus ligniperda)活跃,分别占总渔获量的3.5%和3.7%。最高温度和风速对三种鸟类的飞行活动都有影响,但在所有港口的影响并不普遍。飞行活动在20°C以上转变为非线性模式。在9月下旬至4月下旬之间,阿霍帕卢斯有单峰飞行风险期。除达尼丁为双峰型外,水螅也呈单峰型。在春季和夏中末活动期,水螅均呈双峰型。虽然在冬季观察到水螅,但冬季飞行事件的概率在每周0到0.02之间。5月至8月期间,达尼丁港的木脂藻飞行概率为零,其他所有港口的木脂藻飞行概率均较低。结论:模拟飞行概率的季节变化可以为基于风险的植物检疫措施提供信息。我们证明了最高温度和季节性作为木材商品侵染风险的预测因子的效用。这样的预测使国家植物保护组织能够制定标准,保护单个货物的处理后植物检疫安全。
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引用次数: 7
Increased forest cover and limits on clear-felling could substantially reduce landslide occurrence in Tasman, New Zealand. 在新西兰的塔斯曼,增加森林覆盖和限制砍伐可以大大减少滑坡的发生。
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2020-11-27 DOI: 10.33494/nzjfs502020x94x
James W. Griffiths, C. Lukens, R. May
Background: Landslides can cause substantial environmental, social and economic impacts. Under future climate scenarios the frequency of landslide-triggering events is likely to increase. Land managers, therefore, urgently require reliable high-resolution landslide susceptibility models to inform effective landslide risk assessment and management.Methods: In this study, gridded rainfall, topography, lithology and land cover surfaces were used to develop a high-resolution (10 m x 10 m) spatial model of landslides that occurred in Tasman, New Zealand during a period when ex-tropical Cyclone Gita brought heavy rain to the region. We separately modelled landslides in the same dataset as a function of the erosion susceptibility classification (ESC) data layer used to determine the level of control applied to forestry activities under the National Environmental Standards for Plantation Forestry (NES-PF). Models were fit using boosted regression trees.Results: Our preferred model had excellent predictive power (AUROC = 0.93) and included the parameters: aspect, elevation, mid-slope position, land cover, rainfall, slope, and a descriptive seven-class topographical index. Land cover, elevation, rainfall, slope and aspect were the strongest predictors of landslides with the land cover classes ‘seral native vegetation’ and clear-felled plantation forest’ predicting higher probabilities of landslides and tall native forest and closed canopy plantation forest predicting lower probabilities of landslides. The ESC was a poor predictor of landslides in the study area (AUROC = 0.65).Conclusions: Our study shows that accurate, high-resolution landslide probability surfaces can be developed from landslide distribution, land cover, topographical and rainfall data. We also show that landslide occurrence in the Tasman region could be substantially reduced by increasing the extent of permanent forest cover and by limiting clear-fell harvest of plantation forests on landslide-prone slopes. The ESC framework that underpins the NES-PF was a poor predictor of landslides and, therefore, an unreliable basis for regulating forestry activities in the Tasman, New Zealand.
背景:山体滑坡会对环境、社会和经济造成重大影响。在未来的气候情景下,引发山体滑坡事件的频率可能会增加。因此,土地管理者迫切需要可靠的高分辨率滑坡易感性模型,以便为有效的滑坡风险评估和管理提供信息。方法:在本研究中,利用网格化的降雨、地形、岩性和土地覆盖面,建立了一个高分辨率(10米× 10米)的滑坡空间模型,该模型是在前热带气旋吉塔给新西兰塔斯曼地区带来暴雨期间发生的。我们在同一数据集中分别对滑坡进行建模,作为侵蚀敏感性分类(ESC)数据层的函数,该数据层用于确定根据国家人工林环境标准(NES-PF)对林业活动实施的控制水平。模型使用增强回归树进行拟合。结果:我们的首选模型具有出色的预测能力(AUROC = 0.93),包括坡向、高程、中坡位置、土地覆盖、降雨量、坡度和描述性的7级地形指数。土地覆盖、海拔、降雨量、坡度和坡向是最强的滑坡预测因子,土地覆盖类别“几种原生植被”和砍伐殆尽的人工林预测滑坡的概率较高,而高大的原生森林和封闭的林冠人工林预测滑坡的概率较低。ESC对研究区域的滑坡预测较差(AUROC = 0.65)。结论:我们的研究表明,可以从滑坡分布、土地覆盖、地形和降雨数据中开发出准确、高分辨率的滑坡概率曲面。我们还表明,通过增加永久森林覆盖范围和限制在滑坡易发斜坡上砍伐人工林,可以大大减少塔斯曼地区的滑坡发生。支撑NES-PF的ESC框架不能很好地预测山体滑坡,因此,在管理新西兰塔斯曼的林业活动方面,它不是一个可靠的基础。
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引用次数: 3
Optimisation of ultrasound assisted extraction of antiacetylcholinesterase and antioxidant compounds from manuka (Leptospermum scoparium) for use as a phytomedicine against Alzheimer’s disease 超声辅助提取麦卢卡草抗乙酰胆碱酯酶和抗氧化化合物用于抗阿尔茨海默病植物药的优化
IF 1.5 4区 农林科学 Q2 Agricultural and Biological Sciences Pub Date : 2020-11-25 DOI: 10.33494/nzjfs502020x103x
H. Majid, F. Silva
Background: Alzheimer’s disease is a progressive mental deterioration related to ageing and senility. Approved drugs that inhibit acetylcholinesterase (AChE) enzyme activity in the human brain are one of the ways to control the natural progression of this disease. The present study reports on the optimisation of ultrasound-assisted extraction of antiacetylcholinesterase and antioxidant compounds from manuka leaves using response surface methodology.Methods: A Box-Behnken design was used to investigate the effect of extraction temperature (40–60°C), time (1–20 min), and ethanol concentration (30–70%) on AChE inhibition, antioxidant activity, and extraction yield.Results: The values of AChE, radical scavenging activity (RSA) and yield predicted by the models generated were similar to the experimental values. Extraction time, ethanol concentration and temperature were significant in all the responses. Optimum extraction conditions for maximum AChE inhibition (74%), RSA (79%) and yield (50%) were successfully validated experimentally and the IC50 of the optimised extracts were reduced to 28.5 (from 66.0) and 2.37 (from 32.4) ?g/ mL for AChE and antioxidant activity, respectively. The optimisation enabled an increase in the extraction yield from 21% to 49%.Conclusions: In view of the significant bioactive properties determined, with possible beneficial effects on memory deficit, we would encourage the use of the manuka leaf extract for the development of new phytopharmaceuticals to improve brain function and control dementias such as Alzheimer’s disease. One other application could be as a beverage for the preparation of tea infusions.
背景:阿尔茨海默病是一种与衰老有关的进行性精神退化。经批准的抑制人脑乙酰胆碱酯酶(AChE)活性的药物是控制这种疾病自然进展的方法之一。本研究采用响应面法对麦卢卡叶中抗乙酰胆碱酯酶和抗氧化化合物的超声辅助提取工艺进行了优化。方法:采用Box-Behnken设计,考察提取温度(40 ~ 60℃)、时间(1 ~ 20 min)、乙醇浓度(30 ~ 70%)对乙酰胆碱酯酶抑制、抗氧化活性和提取率的影响。结果:所建立的模型预测的AChE、自由基清除活性(RSA)和产率与实验值相近。提取时间、乙醇浓度和温度对这些反应均有显著影响。实验验证了最佳提取条件对AChE的最大抑制作用(74%)、RSA(79%)和产率(50%),优化后的提取物对AChE和抗氧化活性的IC50分别降至28.5(66.0)和2.37 (32.4)?g/ mL。优化后的萃取率从21%提高到49%。结论:鉴于麦卢卡叶提取物具有显著的生物活性,可能对记忆缺陷有有益的影响,我们将鼓励利用麦卢卡叶提取物开发新的植物药,以改善大脑功能和控制阿尔茨海默病等痴呆症。另一种应用可以作为茶泡剂制备的饮料。
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引用次数: 3
期刊
New Zealand Journal of Forestry Science
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