scholarly journals Biomass assessment, volume equations and crown architecture of Eucalyptus pellita F. Muell in a commercial plantation in Mexico

2015 ◽  
Vol 12 (29) ◽  
pp. 46
Author(s):  
María Rodríguez-Solís ◽  
Elemer Briceño-Elizondo ◽  
Jose Pablo Gamboa-Zuñiga ◽  
Dagoberto Arias-Aguilar
Keyword(s):  
Crown Architecture ◽  
Eucalyptus Pellita ◽  
Biomass Assessment ◽  
Commercial Plantation ◽  
Volume Equations

En un ensayo de procedencia se seleccionaron seis árboles de Eucalyptus pellita F. Muell, de diferentes clases de diámetro; para obtener el peso verde en campo cada árbol fue separado en sus componentes: tallo, hojas, ramas. Se llevaron a cabo regresiones lineales para obtener modelos de biomasa para el componente aéreo, utilizando el diámetro a la altura del pecho (DAP) como la variable independiente. Posteriormente se realizaron análisis para obtener la cantidad de carbono (C) y el dióxido de carbono (CO2) almacenado en una plantación de 2.5 años de edad. En general, se obtuvo un promedio de 27.04 kg de carbono almacenados en el tallo y 10.44 kg de carbono en el follaje, que representa un reservorio de 99.23 kg de CO2 almacenados en el tallo y 38.32 kg de CO2 en el follaje. En la literatura, no hay muchos estudios sobre desarrollo de copa; el presente trabajo relaciona altura de la copa, diámetro de copa y altura total en 4 índices que describen una determinada estructura del árbol (cobertura copa (CC), índice de la Copa (CI), forma de copa (CS), sombra de copa (CSd)). Los resultados muestran, para los seis individuos evaluados, un valor relativamente alto para CC, el cual presenta el valor más bajo para el diámetro más pequeño; la cobertura de copa indica que la especie, en este grupo de edad, todavía está en crecimiento de manera exponencial y que su área fotosintética necesita todavía ser alta para sostener tal crecimiento. En cuanto al índice de forma de copa, entre mayor sea el diámetro, mayor es el valor que se obtiene, lo que indica que el crecimiento en diámetro puede estar relacionado positivamente a CS; deduciéndose un desarrollo sano de la copa entre mayor sea este valor. Los valores de CSd confirman esta afirmación al mantenerse la relación.

Near infrared spectroscopy of Eucalyptus pellita for foliar nutrients and the potential for real-time monitoring of trees in fertiliser trial plots

2021 ◽  
pp. 096703352110079
Author(s):  
Agustan Alwi ◽  
Roger Meder ◽  
Yani Japarudin ◽  
Hazandy A Hamid ◽  
Ruzana Sanusi ◽  
...  
Keyword(s):  
Near Infrared ◽  
Acacia Mangium ◽  
Nir Spectroscopy ◽  
Nutrient Status ◽  
Significant Loss ◽  
Eucalyptus Pellita ◽  
Operational Decision Making ◽  
Fertiliser Application ◽  
Planting Distance

Eucalyptus pellita F. Muell. has become an important tree species in the forest plantations of SE Asia, and in Malaysian Borneo in particular, to replace thousands of hectares of Acacia mangium Willd. which has suffered significant loss caused by Ceratocystis manginecans infection in Sabah, Malaysia. Since its first introduction at a commercial scale in 2012, E. pellita has been planted in many areas in the region. The species replacement requires new silvicultural practices to induce the adaptability of E. pellita to grow in the region and this includes relevant research to optimise such regimes as planting distance, pruning, weeding practices and nutrition regimes. In this present study, the nutritional status of the foliage was investigated with the aim to develop near infrared spectroscopic calibrations that can be used to monitor and quantify nutrient status, particularly total foliar nitrogen (N) and phosphorus (P) in the field. Spectra acquired on fresh foliage in situ on the tree could be used to predict N and P with accuracy suitable for operational decision-making regards fertiliser application. If greater accuracy is required, spectra acquired on dry, milled foliage could be used to predict N and P within a relative error of 10% (R2c, r2CV, RMSEP, RPD = 0.77, 0.71, 0.02 g 100/g, 1.9 for foliar P and = 0.90, 0.88, 0.21 g 100/g, 3.0 for foliar N on dry, milled foliage). The ultimate application of this is in situ nutrient monitoring, particularly to aid longitudinal studies in fertiliser trial plots and forest operations, as the non-destructive nature of NIR spectroscopy would enable regular monitoring of individual leaves over time without the need to destructively sample them. This would aid the temporal and spatial analysis of field data.

Guidelines for choosing volume equations in the presence of measurement error in height

2000 ◽  
Vol 30 (2) ◽  
pp. 306-310 ◽  
Author(s):  
M S Williams ◽  
H T Schreuder
Keyword(s):  
Measurement Error ◽  
Tree Species ◽  
Measurement Errors ◽  
Tree Diameter ◽  
Total Height ◽  
Volume Equations

Assuming volume equations with multiplicative errors, we derive simple conditions for determining when measurement error in total height is large enough that only using tree diameter, rather than both diameter and height, is more reliable for predicting tree volumes. Based on data for different tree species of excurrent form, we conclude that measurement errors up to ±40% of the true height can be tolerated before inclusion of estimated height in volume prediction is no longer warranted.

Bud and crown architecture of white spruce and black spruce

Trees ◽  
2006 ◽  
Vol 20 (5) ◽  
pp. 633-641 ◽  
Author(s):  
Stephen J. Colombo ◽  
Colin W. G. Templeton
Keyword(s):  
Black Spruce ◽  
White Spruce ◽  
Crown Architecture

scholarly journals Resistance of Eucalyptus pellita to rust (Puccinia psidii)

2014 ◽  
Vol 14 (4) ◽  
pp. 244-250 ◽  
Author(s):  
Marisângela Rodrigues Santos ◽  
Lúcio Mauro da Silva Guimarães ◽  
Marcos Deon Vilela de Resende ◽  
Leonardo Novaes Rosse ◽  
Karina Carnielli Zamprogno ◽  
...  
Keyword(s):  
Rust Resistance ◽  
Minor Effect ◽  
Primary Method ◽  
Narrow Sense Heritability ◽  
Puccinia Psidii ◽  
Eucalyptus Pellita ◽  
Eucalypt Plantations ◽  
Race 1 ◽  
Promising Source ◽  
Resistant Genotypes

Eucalypts rust (Puccinia psidii) is currently one of the major diseases in commercial eucalypt plantations in Brazil. The primary method of disease control is the use of resistant genotypes, and, among the different species of Eucalyptus, E. pellita is indicated as a promising source of resistance. In this work, the genetic control of rust resistance in E. pellita through inoculations under controlled conditions of 441 plants from four full-sibling families was studied. Inoculations were performed using the monopostular isolate UFV-2, race 1. All families tested segregated for rust resistance, and the number of resistant plants was higher than susceptible in all crosses. Inheritance models based on few genes did not fully explain the observed segregation patterns, and the narrow-sense heritability of rust resistance was estimated between 32.7% and 37.3%. The results suggested that rust resistance in E. pellita is complex and is controlled by major- and minor-effect genes.

Small-tree volume equations for subtropical hardwood plantation species

2021 ◽  
pp. 1-7
Author(s):  
B. W. Hogg ◽  
T. Lewis ◽  
J. R. Huth ◽  
D. J. Lee
Keyword(s):  
Small Tree ◽  
Plantation Species ◽  
Volume Equations

DEVELOPMENT OF NEOLAMARCKIA CADAMBA (KELEMPAYAN) TISSUE CULTURE TECHNIQUES FOR SUSTAINABLE SUPPLY OF PLANTING MATERIALS FOR COMMERCIAL PLANTATION

2015 ◽  
Vol 77 (24) ◽  
Author(s):  
Siti Suhaila A. Rahman ◽  
Norwati Muhammad ◽  
Nor Hasnida Hassan ◽  
Haliza Ismail ◽  
Nazirah Abdullah ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Mass Production ◽  
Nodal Segments ◽  
Direct Organogenesis ◽  
Timber Species ◽  
Culture Techniques ◽  
Commercial Plantation ◽  
Planting Materials ◽  
Tissue Culture Techniques

Neolamarckia cadamba (kelempayan) is a multipurpose and fast growing timber species. The tree is grown for timber, paper-making and as ornamental plant. It is reported that its barks and leaves possesed medicinal values and its flowers are used in perfumes. The species is also known to be suitable for plywood, packing case, toys and short-fibred pulp. Therefore, mass production of high quality planting material of N. cadamba is important to support plantation program of this species. Here we presented mass production of N. cadamba through tissue culture techniques. Nodal segments derived from in vitro germinated seeds were used and induced direct organogenesis to produce shoots and roots using MS media (1962) and plant growth regulators (BAP and IBA) that are relatively cheaper than previously used methods. The tissue culture technique of N. cadamba developed may help in ensuring supply of planting materials that are feasible for commercial plantation purposes.

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