New Zealand Journal of Forestry Science

http://link.springer.com/journal/40490

List of Papers (Total 136)

Leaf area and growth of Chilean radiata pine plantations after thinning across a water stress gradient

BackgroundPinus radiata D.Don has been established in a wide range of soils and climatic conditions, showing high variability in both leaf area and volume productivity. Previous research has shown that plantation yield is affected by water availability, but the majority of this work has been done in unthinned stands and provided little insight on the effect of water availability...

Biomass and root attributes of eight of New Zealand’s most common indigenous evergreen conifer and broadleaved forest species during the first 5 years of establishment

BackgroundTree allometric equations are critical tools for determining tree volume, biomass and carbon stocks. However, there is a lack of species-specific biomass equations for juvenile trees of many of New Zealand’s indigenous species. The aim of this study was to provide allometric equations for total above- and below-ground biomass and total root biomass and length for eight...

Influence of climate on tree mortality in taiwania (Taiwania cryptomerioides) stands in Taiwan

BackgroundTaiwania (Taiwania cryptomerioides Hayata) is a relict tree species found mainly in Taiwan, with smaller populations in China, Vietnam, and Myanmar. Taiwania is considered to be vulnerable to extinction. The objective of this research was to develop a model to predict the mortality of taiwania from climate and other mensurational variables.MethodsThe mensuration...

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

BackgroundConcern 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...

Spatial prediction of basal area and volume in Eucalyptus stands using Landsat TM data: an assessment of prediction methods

Background In fast-growing forests such as Eucalyptus plantations, the correct determination of stand productivity is essential to aid decision making processes and ensure the efficiency of the wood supply chain. In the past decade, advances in remote sensing and computational methods have yielded new tools, techniques, and technologies that have led to improvements in forest...

The accuracy of measurements in a time study of harvester operations

Background Work time measurements are the starting point for any calculation of unit costs of machine exploitation; therefore, the accuracy of evaluating these costs determines the economic effectiveness of technological solutions employed in forest work. The research aimed to determine the level of measurement error of harvester operation times by means of a chronometric method...

Genetic variability in different growth forms of Dendrocalamus strictus: Deogun revisited

BackgroundBamboo is among the important plants that help shape the socio-economic fabric of rural India. It provides employment, sustains business ventures, has medicinal applications and even helps in carbon sequestration. Out of 125 indigenous species, Dendrocalamus strictus (Roxb.) Nees occupies 53% of the area of bamboo in the country. Moreover, D. strictus may be used in...

Simulation studies to examine bias and precision of some estimators that use auxiliary information in design-based sampling in forest inventory

Background Various double sampling methods using both target and auxiliary variables have been developed over many years for use in natural resource inventory. Methods Simulations of inventory were carried out using four different ratio estimators and model-assisted estimation in each of five rather different example forest populations. Estimates of population means and their...

Short-term effects of single-tree selection cutting on stand structure and tree species composition in Valdivian rainforests of Chile

Background The Valdivian temperate rainforest, one of the world’s 25 biodiversity hotspots, is under a continued process of degradation through mismanagement. An approach to reverse this situation might be the development of uneven-aged silviculture, combining biodiversity conservation and timber production. Methods We examined the short-term effects of single-tree selection...

Simulating the impact of climate change on the growth of Chinese fir plantations in Fujian province, China

Background Climate change represents a considerable source of uncertainty with respect to the long-term health and productivity of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) plantations in southeastern China. Methods We employed the process-based, stand-level model FORECAST Climate to investigate the potential impact of four alternative climate-change scenarios on the...

Characterising prediction error as a function of scale in spatial surfaces of tree productivity

Background Two indices, the 300 Index and Site Index, are commonly used to quantify productivity of Pinus radiata D.Don within New Zealand. Although maps of these indices exist, availability of new data and modifications to underlying models makes a refit of these prediction surfaces desirable. Prediction errors of such surfaces have only been reported at a plot-level scale, but...

Tolerance of Hylurgus ligniperda (F.) (Coleoptera: Scolytinae) and Arhopalus ferus (Mulsant) (Coleoptera: Cerambycidae) to ionising radiation: a comparison with existing generic radiation phytosanitary treatments

Background Irradiation is accepted as a phytosanitary treatment for horticultural products by many countries. Irradiation is a potential alternative to chemical fumigation for wood products; however, data supporting its efficacy against potential forestry pests is limited. Methods Irradiation efficacy data were obtained experimentally for Arhopalus ferus (Mulsant) and Hylurgus...

Factors affecting macropropagation of bamboo with special reference to culm cuttings: a review update

Background The gap between demand and supply of bamboo is increasing daily due to the destruction of natural bamboo resources. Therefore, there is a pressing need to find suitable methods for large-scale propagation of bamboo. Currently, bamboo is propagated mainly using vegetative means since seed supplies are often variable or limited. Methods Current literature on available...

Modelling the variation in wood density of New Zealand-grown Douglas-fir

Background Wood density is an important property that affects the performance of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) timber. In order to develop strategies to achieve certain end-product outcomes, forest managers and wood processors require information on the variation in wood density across sites, among trees within a stand and within trees. Therefore, the aim of...

Validation of ultrasonic velocity estimates of wood properties in discs of radiata pine

Background Measurement of microfibril angle (MFA) in the S2 layer of the cell walls of wood using speed of sound in wood has become a common way to estimate wood stiffness and stability. Measurements across the radius of a disc can be critical, but sonic testing needs to be validated against direct measurements of MFA. Methods A robotic machine that uses two transducers to detect...

Comparative studies of the response of larch and birch seedlings from two origins to water deficit

Background Early developmental stages of plants are expected to be a major bottleneck to recruitment. Information on the response of seedling to anticipated water availability is urgently needed in regions where tree seedlings may experience more frequent water deficits. In this paper, we focused on the influence of water deficit on different species (larch vs. birch) and origins...

Mating system and gene flow of Nothofagus alpina (Poepp. & Endl.) Oerst. in a clonal seed orchard

Background Understanding pathways of genetic information transfer from one generation to another is particularly important when open-pollinated seeds are collected for reforestation or for enrichment of native forests. Nothofagus alpina (Poepp. & Endl.) Oerst. is native to temperate forests of southern Chile and Argentina. However, lack of knowledge of its reproductive biology...

Field performance of various Pinus radiata breeding families established on a drought-prone site in central Chile

Background Pinus radiata D.Don is in its third generation of selective breeding on contrasting site types in central Chile, creating interest in its responses to selection and any differential adaptation to site types. We studied the phenotypic variability of growth traits, survival and six ecophysiological traits in 30 open- and control-pollinated families, representing two...

Developing a framework for growth modelling in a managed southern black beech forest

Background A model of individual tree growth using simple predictors in a managed black beech (Fuscospora solandri (Hook.f.) Heenan & Smissen) forest could provide a useful tool for predicting future stand characteristics. Methods Data from permanent sample plots were used to develop a framework for modelling individual tree growth in Woodside forest, a managed black beech forest...

Variability in seed germination and seedling growth at the intra- and inter-provenance levels of Nothofagus glauca (Lophozonia glauca), an endemic species of Central Chile

Background Patterns of seed germination and subsequent seedling growth of the endemic species Nothofagus glauca (Phil.) Krasser (Lophozonia glauca) (Hualo) were studied in two provenances from Mediterranean Central Chile (pre-Andean mountain range provenance and coastal range provenance). The main aim of the study was to determine differences in seed germination and seedling...

Stochastic economic analyses of even-aged timber growing

Background StochPV is a computer programme enabling the risks and uncertainties inherent in even-aged timber growing to be recognised through stochastic analysis. Most financial analyses of even-aged plantation or forest stands have used deterministic analyses, such that a single set of volumes, costs and prices yields a single answer for the present value. Risks and...

Adaptation of Norway spruce populations in Europe: a case study from northern Poland§

Background The productive potential of European species of forest tree assumes particular importance in the context of populations adapting to accelerating climatic change. Genotype-environment interaction (G × E) was studied to determine Picea abies (L.) H.Karst. (Norway spruce) inter-population variation, characterising their adaptability to the growing conditions in north...

Comparison between meteorological data from the New Zealand National Institute of Water and Atmospheric Research (NIWA) and data from independent meteorological stations

Background Hybrid eco-physiological/mensurational models of forest production generally require monthly meteorological estimates at local points in the landscape as inputs. Where to obtain these estimates and how best to localise them are important questions for modellers. Data collected from nine independent meteorological stations were compared with estimates from the nearest...