scholarly journals Product and Residue Biomass Equations for Individual Trees in Rotation Age Pinus radiata Stands under Three Thinning Regimes in New South Wales, Australia

Forests ◽  
2017 ◽  
Vol 8 (11) ◽  
pp. 439 ◽  
Author(s):  
Xin Wang ◽  
Huiquan Bi ◽  
Fabiano Ximenes ◽  
Jorge Ramos ◽  
Yun Li
Keyword(s):  
Pinus Radiata ◽  
New South ◽  
New South Wales ◽  
South Wales ◽  
Biomass Equations ◽  
Residue Biomass ◽  
Rotation Age ◽  
Individual Trees

scholarly journals Additive predictions of aboveground stand biomass in commercial logs and harvest residues for rotation age Pinus radiata plantations in New South Wales, Australia

2021 ◽  
Author(s):  
Xixi Qiao ◽  
Huiquan Bi ◽  
Yun Li ◽  
Fabiano Ximenes ◽  
Christopher J. Weston ◽  
...  
Keyword(s):  
Pinus Radiata ◽  
New South ◽  
System Of Equations ◽  
Systems Of Equations ◽  
Dummy Variables ◽  
South Wales ◽  
Residue Biomass ◽  
Rotation Age ◽  
Clear Fell ◽  
Harvest Residue

AbstractTwo systems of additive equations were developed to predict aboveground stand level biomass in log products and harvest residue from routinely measured or predicted stand variables for Pinus radiata plantations in New South Wales, Australia. These plantations were managed under three thinning regimes or stand types before clear-felling at rotation age by cut-to-length harvesters to produce sawlogs and pulpwood. The residue material following a clear-fell operation mainly consisted of stumps, branches and treetops, short off-cut and waste sections due to stem deformity, defects, damage and breakage. One system of equations did not include dummy variables for stand types in the model specification and was intended for more general use in plantations where stand density management regimes were not the same as the stand types in our study. The other system that incorporated dummy variables was for stand type-specific applications. Both systems of equations were estimated using 61 plot-based estimates of biomass in commercial logs and residue components that were derived from systems of equations developed in situ for predicting the product and residue biomass of individual trees. To cater for all practical applications, two sets of parameters were estimated for each system of equations for predicting component and total aboveground stand biomass in fresh and dry weight respectively. The two sets of parameters for the system of equations without dummy variables were jointly estimated to improve statistical efficiency in parameter estimation. The predictive performances of the two systems of equations were benchmarked through a leave-one-plot-out cross validation procedure. They were generally superior to the performance of an alternative two-stage approach that combined an additive system for major components with an allocative system for sub-components. As using forest harvest residue biomass for bioenergy has increasingly become an integrated part of forestry, reliable estimates of product and residue biomass will assist harvest and management planning for clear-fell operations that integrate cut-to-length log production with residue harvesting.

scholarly journals Bomb Radiocarbon in Tree Rings from Northern New South Wales, Australia: Implications for Dendrochronology, Atmospheric Transport, and Air-Sea Exchange of CO2

Radiocarbon ◽  
2003 ◽  
Vol 45 (3) ◽  
pp. 431-447 ◽  
Author(s):  
Quan Hua ◽  
Mike Barbetti ◽  
Ugo Zoppi ◽  
David M Chapman ◽  
Bruce Thomson
Keyword(s):  
Pinus Radiata ◽  
Atmospheric Transport ◽  
New South ◽  
New South Wales ◽  
Ring Width ◽  
Study Region ◽  
False Rings ◽  
South Wales ◽  
Bomb Radiocarbon ◽  
Standard Techniques

We have analyzed by radiocarbon 27 consecutive single rings, starting from AD 1952, of a preliminarily cross-dated section (DFR 021) of Pinus radiata, which grew in Armidale, northern New South Wales, Australia. The bomb 14C results suggested the possibility of 2 false rings, and, consequently, 2 misidentified rings in the preliminary count for this section. This possibility was supported by a better ring-width correlation between the revised DFR 021 count and other Pinus radiata chronologies in the study region. This indicated that bomb 14C is a useful tool to complement the standard techniques of dendrochronology in tree species where annual rings are not always clearly defined.

Comparison of Bird Counts From Pine Forest and Indigenous Vegetation.

1977 ◽  
Vol 4 (3) ◽  
pp. 281 ◽  
Author(s):  
PV Driscoll
Keyword(s):  
Pinus Radiata ◽  
New South ◽  
New South Wales ◽  
Bird Communities ◽  
Pine Forest ◽  
Native Forest ◽  
Number Of Species ◽  
Eucalyptus Forest ◽  
South Wales ◽  
Forest Habitats

Bird counts were taken in Feb., March and July 1975 in 4 native habitats, ranging from wet sclerophyll Eucalyptus forest to mallee (E. stricta)-heath on the Boyd Plateau, and two Pinus radiata habitats (20 yr and 40 yr) in the Jenolan State Forest, New South Wales, Australia. In each season the number of birds and the number of species was highest in the native forest habitats, lower in the pine habitats and least in the mallee-heath. The composition of native forest, pine forest, and mallee-heath bird communities shows considerable differences.

Characteristics of soil and productivity of Pinus radiata (D Don) in New South Wales .II. Pedogenesis on a range of parent materials

Soil Research ◽  
1986 ◽  
Vol 24 (1) ◽  
pp. 103 ◽  
Author(s):  
PJ Ryan
Keyword(s):  
Pinus Radiata ◽  
Soil Depth ◽  
New South ◽  
New South Wales ◽  
Morphological Properties ◽  
Slope Position ◽  
Site Classification ◽  
Physical Factors ◽  
Parent Materials ◽  
South Wales

Soil profile descriptions were made at a series of 11-year-old unfertilized Pinus radiata stands in the Lithgow district of New South Wales. Catenas within three soil parent materials were selected to compare variation in soil physical and morphological properties with growth of P. radiata. These parent materials were a Silurian siltstone, a Permian conglomerate and a Silurian-Devonian rhyolite. Basal area growth of the P. radiata stands increased down catenas on the Silurian siltstone as soil depth to a root impeding layer increased. Plateau soils on the Permian conglomerate had hardsetting surfaces and high gravel contents, and were associated with very poor pine growth. By way of contrast, lower slope, colluvial gradational earths were deep, fine-textured soils and supported more productive pine stands. The Silurian-Devonian rhyolite parent material produced highly leached soils, commonly with conspicuously bleached A2 horizons and poor sandy textures of surface soil. Both physical and chemical features of the rhyolite interacted with pedological processes to affect adversely soil physical conditions and trace element availability, in particular boron. The poorer P. radiata growth on lower or concave slope in comparison with upper slope position was a result of increased soil leaching and horizon differentiation. This pattern contrasted with improved pine growth on the deeper soils on lower slopes on the two sedimentary parent materials. These case studies emphasize the importance of geology and pedological processes when evaluating the applicability of specific soil physical factors to site classification for P. radiata plantations.

Water Relations of Rural Eucalypt Dieback.

1988 ◽  
Vol 36 (2) ◽  
pp. 233 ◽  
Author(s):  
DS Crombie ◽  
JA Milburn
Keyword(s):  
Disease Severity ◽  
Water Relations ◽  
New South ◽  
New South Wales ◽  
Leaf Water ◽  
Eucalyptus Species ◽  
Water Potentials ◽  
South Wales ◽  
Individual Trees

The water relations of healthy and dieback-affected individuals of three Eucalyptus species typical of the northern tablelands of New South Wales were compared. Dawn water potentials of healthy and dieback-affected trees were all very similar. Midday water potentials of trees with the most severe dieback symptoms were often lower than those of nearby healthy trees by up to 0.6 MPa. Leaf con- ductances of the most severely dieback-affected trees were usually greater than those of healthy trees. Differences decreased with time and when more trees with less severe symptoms were measured late in the study no significant differences in water relations were found. It seems therefore that the effects of dieback on the water relations of trees are too small for measurements of leaf water potentials or leaf conductances to be useful indicators of disease severity in individual trees.

Characteristics of soil and productivity of Pinus radiata (D Don) in New South Wales .I. Relative importance of soil physical and chemical parameters

Soil Research ◽  
1986 ◽  
Vol 24 (1) ◽  
pp. 95 ◽  
Author(s):  
ND Turvey ◽  
AB Rudra ◽  
J Turner
Keyword(s):  
Total Nitrogen ◽  
Pinus Radiata ◽  
Soil Depth ◽  
New South ◽  
New South Wales ◽  
Chemical Parameters ◽  
South Wales ◽  
Physical And Chemical Parameters ◽  
Volume Production ◽  
Physical And Chemical

The objectives of the study were to determine whether selected soil physical and chemical parameters could be used as predictors of site and the productivity of Pinus radiata (D. Don). The study was carried out in the Lithgow district of New South Wales. Sixty plots were located in first-rotation unthinned stands of P. radiata of age 11 years. None of the stands had received fertilizer. The stands were selected to cover a wide range of merchantable volume production (0-175 m3 ha-1), and were located on a range of geological types including siltstone, medium-grained quartz sandstone, conglomerate, and rhyolitic tuff and lava. Soil depth was positively correlated, and per cent sand negatively correlated with all stand production variables. No other soil physical-or chemical variables were correlated consistently with stand variables. Discriminant analysis was used to test for the ability of a selected subset of soil physical and chemical variables to discriminate (a) between three volume production classes, and (b) between three geological groups. Soil depth, per cent sand, and total nitrogen contributed to two functions which discriminated between volume production groups. Cation exchange capacity, Bray phosphorus, per cent sand, exchangeable sodium, and total nitrogen contributed to two functions which discriminated between geological groups. Thus soil physical parameters were predominant in discriminating between volume production groups, and soil chemical parameters were predominant in discriminating between geological groups.

scholarly journals A New Breeding Strategy for Pinus radiata in New Zealand and New South Wales

2009 ◽  
Vol 58 (1-6) ◽  
pp. 28-38 ◽  
Author(s):  
H. S. Dungey ◽  
J. T. Brawner ◽  
F. Burger ◽  
M. Carson ◽  
M. Henson ◽  
...  
Keyword(s):  
New Zealand ◽  
Pinus Radiata ◽  
New South ◽  
New South Wales ◽  
Radiata Pine ◽  
Breeding Strategy ◽  
Forward Selection ◽  
Additional Increase ◽  
South Wales ◽  
New Strategy

Abstract A new breeding strategy is presented for the Radiata Pine Breeding Company, a New Zealand based research consortium, that drives the breeding program for Pinus radiata for both the New Zealand and New South Wales based Australian forest plantation industry. The new strategy builds on the existing base for P. radiata, and on the last strategy review in 2000. The new strategy comprises a large open-pollinated (OP) Main Population (MP) with 500 female parents and two sublines (250 female parents per subline). The MP will be tested using alpha designs, single-tree plots and incomplete blocks to maximise efficiency. Each subline will be tested on four sites, geographically distant from the other subline. The MP will be managed in discrete generations. Selection of the next generation will be using a combination of backward and forward selection, but the strict control of inbreeding with identified lineage will rely on the development of parental reconstruction for OP progeny. There are alternatives to this, however, such as estimating the group coancestry and accepting some additional increase in inbreeding. This is a new and significant departure from previous breeding strategies for P. radiata in New Zealand. There will also be a single, small Elite Population (EP), tested 50% as progeny and 50% as clones. Twenty four parents will be tested each year as clones and 24 as seedling progeny with some overlap between the two. It is expected that the clonal population will capture the greatest gains in traits with low heritabilities, and the half-sib progeny will capture the greatest gains in traits with high heritabilities. The two sublines will be maintained in the EP, and breeding will be managed as a rolling front with trials established every year, while trials of the MP will be established every 10 years.

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