scholarly journals Quantification of nutrient content in above-ground biomass of young Acacia mearnsii De Wild., provenance Bodalla

2002 ◽  
Vol 59 (8) ◽  
pp. 833-838 ◽  
Author(s):  
Marcos Vin�icius Winckler Caldeira ◽  
Mauro Valdir Schumacher ◽  
Peter Spathelf
Keyword(s):  
Nutrient Content ◽  
Above Ground Biomass ◽  
Acacia Mearnsii ◽  
Ground Biomass

scholarly journals Epiphyte biomass and nutrient capital of a moist subtropical forest in north-eastern Taiwan

2002 ◽  
Vol 18 (5) ◽  
pp. 659-670 ◽  
Author(s):  
Chia-Chun Hsu ◽  
Fu-Wen Horng ◽  
Chen-Meng Kuo
Keyword(s):  
Nutrient Cycling ◽  
Nutrient Content ◽  
Subtropical Forest ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
North Eastern ◽  
Tree Foliage

A plot of 1200 m2 was selected to represent the average epiphyte abundance of a moist subtropical broadleaved forest at Fushan in north-eastern Taiwan. In this plot, all epiphytes of 18 sample trees with dbh > 5 cm were removed and weighed to estimate their biomass and nutrient content. We found that the biomass of epiphytes and their associated detrital matter in this plot was 3360 kg ha-1. The nutrient capital of the epiphytes (kg ha-1) was: N = 42.4, P = 1.9, Mg = 5.5, Na = 1.3, Ca = 14.5 and K = 28.9. Although the epiphytic biomass constituted less than 2% of the total above-ground biomass of the forest, the epiphytes comprised about 21-43% of the total foliage nutrient capital of the ecosystem. Because nutrients contained in epiphytes and tree foliage are more readily available to other organisms than those in woody components, epiphytes may play a greater role in ecosystem nutrient cycling than their relatively small biomass would suggest.

scholarly journals Estimativa do conteúdo de nutrientes em um povoamento jovem de Acacia mearnsii De Wild. estabelecido na região sul do Brasil

FLORESTA ◽  
1999 ◽  
Vol 29 (12) ◽  
Author(s):  
MARCOS VINICIUS WINCKLER CALDEIRA ◽  
MAURO VALDIR SCHUMACHER ◽  
ELIAS MOREIRA Dos SANTOS ◽  
NEURA TEDESCO ◽  
JOSANI CARBONERA PEREIRA
Keyword(s):  
Dry Matter ◽  
Low Fertility ◽  
Above Ground Biomass ◽  
Acacia Mearnsii ◽  
Nutrient Contents ◽  
High Acidity ◽  
Ground Biomass ◽  
Young Stand ◽  
Black Wattle ◽  
Lake George

No presente trabalho foi quantificado o conteúdo de nutrientes em uma procedência australiana de Lake Geoge Bunge Dore, acácia-negra, (Acacia mearnsii De Wild.), aos 2,4 anos de idade. Esse material encontra-se estabelecido em solos de baixa fertilidade, com acidez elevada, localizado na Fazenda Menezes, no Distrito de Capão Comprido, município de Butiá, RS. Foram selecionados um total de 9 árvores para comporem as amostras. A amostragem constituiu na individualização dos compartimentos da biomassa aérea (folhas, galhos vivos, galhos mortos, casca e madeira) visando à determinação da matéria seca e do conteúdo de nutrientes. As quantidades de nutrientes contidas na biomassa total desse material foram de 334,37 kg.ha-1 de N; 23,65 kg.ha-1 de P; 259,67 kg.ha-1 de K; 107,73 kg.ha-1 de Ca; 35,09 kg.ha-1 de Mg e 21,43 kg ha-1 de S. Quanto a distribuição nos compartimentos, 61,07% da matéria seca foi alocada para as folhas e galhos (vivos e mortos), contento 73% do N; 72,4% do P; 64% do K; 55% do Ca, 66% do Mg e 75% do S do total existente na parte aérea. O componente fuste (casca e madeira) acumulou 27% do N; 27,6% do P; 36% do K; 45% do Ca, 34% do Mg e 25% do S. Estimation of content of nutrients in a young stand of Acacia mearnsii De Wild. established in the southern of Brazil Abstract The content of nutrients in a black wattle australian Lake George Bunge Dore provenance (Acacia mearnsii De Wild.) with 2.4 years old was quantified. The stands are established in low fertility soils with high acidity at Menezes Farm, Capão Comprido District, municipality of Butiá, RS. Nine trees were selected to compound the samples. The sampling consisted on separating the above-ground biomass compartments (leaves, live branches, dead branches, bark and wood) to determine the dry matter and the nutrient contents. The nutrient quantities in the above-ground biomass were 334.37 kg.ha-1 N; 23.65 kg.ha-1 P; 259.67 kg.ha-1 K; 107.73 kg.ha-1 Ca; 35,09 kg.ha-1Mg and 21.43 kg ha-1 de S. 61.07% of dry matter was allocated to leaves and branches (live and dead) containing 73% N; 72.4% P; 64% K; 55% Ca, 66% Mg and 75% S. The stem component (bark and wood) accumulated 27% N; 27.6% P; 36% K; 45% Ca, 34% Mg and 25% S.

The effect of wastewater discharge on biomass production and nutrient content of Cyperus papyrus and Miscanthidium violaceum in the Nakivubo wetland, Kampala, Uganda

2003 ◽  
Vol 48 (5) ◽  
pp. 233-240 ◽  
Author(s):  
F. Kansiime ◽  
M. Nalubega ◽  
J.J.A. van Bruggen ◽  
P. Denny
Keyword(s):  
Biomass Production ◽  
Dry Weight ◽  
Nutrient Content ◽  
Flow Patterns ◽  
Above Ground Biomass ◽  
Cyperus Papyrus ◽  
Total Load ◽  
Plant Parts ◽  
Ground Biomass ◽  
Annual Total

The nutrient content of representative plant parts and biomass production in the Nakivubo wetland, correlation of these with the wastewater flow patterns and determination of nutrient uptake, storage and biomass production of Cyperus papyrus (papyrus) and Miscanthidium violaceum was studied. On average papyrus vegetation under the influence of wastewater had higher nutrient content in the above ground biomass (1.6% N and 0.23% P on dry weight basis) than those not affected (0.98% N and 0.18% P). The biomass varied between 3,529-5,844 g/m2 and 883-1,156 g/m2 in the two respective sites. The juvenile plants of papyrus and Miscanthidium had higher concentrations of P and N in their organs compared to the mature ones. Considering the nutrients stored by the dominant vegetation and the current flow patterns of wastewater in the Nakivubo wetland, harvesting of the above ground biomass once a year, would remove 7.7% of the N input and 15.8% of the P input of the annual total load entering the wetland. However, if the wetland is bio-manipulated and the wastewater flow distributed over the whole wetland, up to 70% nitrogen and 76% phosphorus would be removed by harvesting above ground papyrus biomass.

scholarly journals ACÚMULO E EXPORTAÇÃO DE MICRONUTRIENTES EM UM POVOAMENTO DE ACÁCIA-NEGRA (Acacia mearnsii DE WILD.) PROCEDÊNCIA BODALLA - AUSTRÁLIA

FLORESTA ◽  
2003 ◽  
Vol 33 (1) ◽  
Author(s):  
Marcos Vinicius Winckler Caldeira ◽  
Rubens Marques Rondon Neto ◽  
Mauro Valdir Schumacher
Keyword(s):  
Above Ground Biomass ◽  
Acacia Mearnsii ◽  
Ground Biomass ◽  
Black Wattle ◽  
The Dead

O presente trabalho teve por objetivo avaliar o conteúdo e a exportação de micronutrientes (Mn, B, Cu, Zn e Fe) e Na nos diferentes componentes das árvores de um povoamento de acácia-negra (Acacia mearnsii De Wild.), procedência australiana Bodalla, com 2,4 anos de idade no município de Butiá/RS. A proporção de micronutrientes acumulada na biomassa acima do solo dos componentes da árvore foi: folhas (46,8%), galhos vivos (19,7%), casca (12,1%), galhos mortos (12,0%) e madeira do tronco (9,4%). A quantidade estimada de micronutrientes contido na biomassa acima do solo foi de 5,2 kg ha–1. ACCUMULATION AND MICRONUTRIENT EXPORTATION OF IN A STAND OF BLACK WATTLE (Acacia mearnsii DE WILD.) AUSTRALIAN BODALLA PROCEDENCE Abstract The present study had the purpose of evaluating the micronutrient (Mn, B, Cu, Zn e Fe) and Na content in exportation in diferent components of the 2.4 year old black wattle (Acacia mearnsii De Wild.), trees from Bodalla Australian provenance in the municipality of Butiá/RS. 46.8% of the nutrients accumulated inn the leaves, 19.7% in the live branches, 12.0% in the dead branchesa nd 9.4% in the wood of the stem. The estimated micronutrient content in the above-ground biomass was 5,2 kg ha–1.

Biomass, Nutrient Content and Growth Response to Fertilisers of Six-year-old Eucalyptus globulus Plantations at Three Contrasting Sites in Gippsland, Victoria

1997 ◽  
Vol 45 (1) ◽  
pp. 103 ◽  
Author(s):  
L. T. Bennett ◽  
C. J. Weston ◽  
P. M. Attiwill
Keyword(s):  
Eucalyptus Globulus ◽  
Sandy Loam ◽  
Nutrient Content ◽  
Annual Rainfall ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
P Content ◽  
Eastern Australia ◽  
Treatment Responses ◽  
Establishment Phase

Factorial combinations of three rates of N (up to 400 kg ha-1 elemental) and four rates of P (up to 200 kg ha-1) were applied during the establishment phase of Eucalyptus globulus Labill. plantations on three contrasting sites in Gippsland, south-eastern Australia. Mean annual increments of volume at 71 months ranged from 8 m3 ha-1 year-1 in control treatments on a duplex sandy loam (annual rainfall 850 mm) and a uniform sand (620 mm rainfall) to 23 m3 ha-1 year-1 at the highest combined additions of N and P on a gradational clay loam (1000 mm rainfall). Volumes to 71 months were greatest at the highest combined additions of N and P on the uniform and gradational soils, but significant effects of N and P additions were not sustained on the duplex soil, where the availability of K was limiting after 45 months. Trees were sampled for above-ground biomass and nutrient content at 6 years from four treatments involving the highest additions of N and P and treatment responses were interpreted using vector analysis. The greater magnitude of P vectors than N vectors at all sites indicated that P additions, in particular, were important for good early growth. However, relationships between above-ground biomass and P content indicated accumulation of P in excess of growth requirements and reduced efficiency of P additions at the highest rates. The paper concludes with general recommendations for fertiliser additions during the establishment phase of E. globulus plantations.

Soil nutrient content, above-ground biomass and litter in a semi-arid shrubland, South Africa

Geoderma ◽  
2011 ◽  
Vol 164 (3-4) ◽  
pp. 128-137 ◽  
Author(s):  
Peter Azah Abanda ◽  
John S. Compton ◽  
Robyn E. Hannigan
Keyword(s):  
South Africa ◽  
Soil Nutrient ◽  
Nutrient Content ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
Soil Nutrient Content ◽  
Semi Arid

ESTIMATION OF ABOVE GROUND BIOMASS OF THE THREE SITES (GRAZED SITE, PROTECTED SITE AND SEED SOWN SITE) FOR COMPARING THEIR PRODUCTIVITY IN KASHMIR VALLEY

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
AFSHAN ANJUM BABA ◽  
SYED NASEEM UL-ZAFAR GEELANI ◽  
ISHRAT SALEEM ◽  
MOHIT HUSAIN ◽  
PERVEZ AHMAD KHAN ◽  
...  
Keyword(s):  
Protected Areas ◽  
Aboveground Biomass ◽  
Plant Biomass ◽  
Summer Season ◽  
Above Ground Biomass ◽  
Spring Season ◽  
Kashmir Valley ◽  
Ground Biomass ◽  
Maximum Value ◽  
Protected Site

The plant biomass for protected areas was maximum in summer (1221.56 g/m2) and minimum in winter (290.62 g/m2) as against grazed areas having maximum value 590.81 g/m2 in autumn and minimum 183.75 g/m2 in winter. Study revealed that at Protected site (Kanidajan) the above ground biomass ranged was from a minimum (1.11 t ha-1) in the spring season to a maximum (4.58 t ha-1) in the summer season while at Grazed site (Yousmarag), the aboveground biomass varied from a minimum (0.54 t ha-1) in the spring season to a maximum of 1.48 t ha-1 in summer seasonandat Seed sown site (Badipora), the lowest value of aboveground biomass obtained was 4.46 t ha-1 in spring while as the highest (7.98 t ha-1) was obtained in summer.

scholarly journals The climatic imprint of bimodal distributions in vegetation cover for western Africa

2016 ◽  
Vol 13 (11) ◽  
pp. 3343-3357 ◽  
Author(s):  
Zun Yin ◽  
Stefan C. Dekker ◽  
Bart J. J. M. van den Hurk ◽  
Henk A. Dijkstra
Keyword(s):  
Land Cover ◽  
Congo Basin ◽  
Shortwave Radiation ◽  
Mean Annual Precipitation ◽  
Above Ground Biomass ◽  
Precipitation Regime ◽  
Ground Biomass ◽  
Western Africa ◽  
Precipitation Regimes ◽  
Woody Cover

Abstract. Observed bimodal distributions of woody cover in western Africa provide evidence that alternative ecosystem states may exist under the same precipitation regimes. In this study, we show that bimodality can also be observed in mean annual shortwave radiation and above-ground biomass, which might closely relate to woody cover due to vegetation–climate interactions. Thus we expect that use of radiation and above-ground biomass enables us to distinguish the two modes of woody cover. However, through conditional histogram analysis, we find that the bimodality of woody cover still can exist under conditions of low mean annual shortwave radiation and low above-ground biomass. It suggests that this specific condition might play a key role in critical transitions between the two modes, while under other conditions no bimodality was found. Based on a land cover map in which anthropogenic land use was removed, six climatic indicators that represent water, energy, climate seasonality and water–radiation coupling are analysed to investigate the coexistence of these indicators with specific land cover types. From this analysis we find that the mean annual precipitation is not sufficient to predict potential land cover change. Indicators of climate seasonality are strongly related to the observed land cover type. However, these indicators cannot predict a stable forest state under the observed climatic conditions, in contrast to observed forest states. A new indicator (the normalized difference of precipitation) successfully expresses the stability of the precipitation regime and can improve the prediction accuracy of forest states. Next we evaluate land cover predictions based on different combinations of climatic indicators. Regions with high potential of land cover transitions are revealed. The results suggest that the tropical forest in the Congo basin may be unstable and shows the possibility of decreasing significantly. An increase in the area covered by savanna and grass is possible, which coincides with the observed regreening of the Sahara.

Above-ground biomass estimation of Indian tropical forests using X band Pol-InSAR and Random Forest

2021 ◽  
Vol 21 ◽  
pp. 100462
Author(s):  
Sadhana Yadav ◽  
Hitendra Padalia ◽  
Sanjiv K. Sinha ◽  
Ritika Srinet ◽  
Prakash Chauhan
Keyword(s):  
Random Forest ◽  
Tropical Forests ◽  
Biomass Estimation ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
X Band

scholarly journals Comparison of Capability of SAR and Optical Data in Mapping Forest above Ground Biomass Based on Machine Learning

2020 ◽  
Vol 5 (1) ◽  
pp. 13
Author(s):  
Negar Tavasoli ◽  
Hossein Arefi
Keyword(s):  
Machine Learning ◽  
Carbon Stock ◽  
Vegetation Indices ◽  
Forest Biomass ◽  
Principal Component ◽  
Optical Data ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
Texture Characteristics ◽  
Sentinel 2

Assessment of forest above ground biomass (AGB) is critical for managing forest and understanding the role of forest as source of carbon fluxes. Recently, satellite remote sensing products offer the chance to map forest biomass and carbon stock. The present study focuses on comparing the potential use of combination of ALOSPALSAR and Sentinel-1 SAR data, with Sentinel-2 optical data to estimate above ground biomass and carbon stock using Genetic-Random forest machine learning (GA-RF) algorithm. Polarimetric decompositions, texture characteristics and backscatter coefficients of ALOSPALSAR and Sentinel-1, and vegetation indices, tasseled cap, texture parameters and principal component analysis (PCA) of Sentinel-2 based on measured AGB samples were used to estimate biomass. The overall coefficient (R2) of AGB modelling using combination of ALOSPALSAR and Sentinel-1 data, and Sentinel-2 data were respectively 0.70 and 0.62. The result showed that Combining ALOSPALSAR and Sentinel-1 data to predict AGB by using GA-RF model performed better than Sentinel-2 data.

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