scholarly journals Litterfall and Nutrient Return in Eucalyptus dunnii Maiden in the Pampa Biome, Brazil

2019 ◽  
Vol 11 (5) ◽  
pp. 362
Author(s):  
Dione Richer Momolli ◽  
Mauro Valdir Schumacher ◽  
Márcio Viera ◽  
Aline Aparecida Ludvichak ◽  
Claudiney do Couto Guimarães ◽  
...  
Keyword(s):  
Organic Matter ◽  
Climatic Variable ◽  
Nutrient Return ◽  
Pampa Biome ◽  
Eucalyptus Dunnii

The objective of this study was to evaluate litterfall and nutrient return in a Eucalyptus dunnii Maiden stand in the Pampa Biome. Four plots were established and four litter collectors per plot were distributed systematically with an area of 0.5 m² and four subplots used to collect large branches of > 0.5 cm diameter. The collections were carried out biweekly with monthly chemical analyzes over 12 months. The annual litterfall was 8.48 Mg ha-1, of which 59% was composed of leaves. In general, the leaves had the highest macronutrient contents except for Mg. The total macronutrient return was 215 kg ha-1, in the following order: Ca > N > K > Mg > S > P, with the leaves responsible for the return of 73% of the total. The litter represented an important source of organic matter and nutrients, and temperature is the climatic variable that best explains the pattern of production.

scholarly journals NUTRIENT RETURN THROUGH LITTERFALL IN A Eucalyptus dunnii Maiden STAND IN SANDY SOIL

2016 ◽  
Vol 40 (6) ◽  
pp. 1041-1048 ◽  
Author(s):  
Aline Aparecida Ludvichak ◽  
Mauro Valdir Schumacher ◽  
Grasiele Dick ◽  
Dione Richer Momolli ◽  
Huan Pablo de Souza ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Sandy Soil ◽  
Soil Characteristics ◽  
Forest Stand ◽  
Low Fertility ◽  
Nutrient Return ◽  
Pampa Biome ◽  
Eucalyptus Dunnii ◽  
Transfer Order ◽  
Subsequent Chemical

ABSTRACT In a forest stand, litterfall is primarily responsible for the retention and return of nutrients to the soil. The objective of this study was to evaluate the return of nutrients through litterfall in a stand of Eucalyptus dunnii in a Pampa biome. For quantification of litterfall, four 420-m2 installments were marked; within each one, four 0.50-m2 collection plots were distributed. For the collection of thick branches, four 7.00-m2 sub-plots were staked out. The collected litterfall was separated into leaf, twig, thick branch, and miscellany fractions for subsequent chemical analysis. The total litterfall measured was 6.99 Mg ha-1 yr-1, and comprised 61.57% leaves, 17.34% twigs, 13.83% thick branches, and 7.26% miscellany. The total amount of macronutrients in the litterfall was 160.22 kg ha-1 yr-1, and the macronutrient transfer order was the same for the leaf, twig, and thick branch fractions (Ca > N > K > Mg > S > P). The total quantity of micronutrients was 7.55 kg ha-1 yr-1, and the transfer order was Mn > Fe > B > Zn > Cu. Maintaining litterfall on the site, especially in degraded or low fertility soils like in the Pampa biome, may contribute to possible improvements in soil characteristics.

scholarly journals Fertilização em Eucalyptus dunnii Maiden no bioma Pampa - Brasil

2021 ◽  
Vol 9 ◽  
pp. e01
Author(s):  
Grasiele Dick ◽  
Mauro Valdir Schumacher ◽  
Elias Frank de Araújo
Keyword(s):  
Soil Fertility ◽  
Central Region ◽  
Productive Capacity ◽  
Mineral Fertilization ◽  
Individual Volume ◽  
Pampa Biome ◽  
Eucalyptus Dunnii ◽  
Species Productivity

In silviculture, mineral fertilization is necessary to supply the nutritional demand, however, the recommendation of the quantities to be applied should aim at maintaining the productive capacity of the soil. The purpose of this study is to test whether increasing the recommended fertilizer dose improves soil fertility and increases the productivity of Eucalyptus dunnii in sites in the central region of the Pampa biome, Brazil. The doses of 150 g (T0), 225 g (T1) and 450 g (T2) of N-P2O5-K2O were applied 24:00:24 per plant, after 14 months of planting. In all tested doses, the species productivity is considered satisfactory for the site. There was an improvement in soil fertility, especially in potassium contents, in addition to a higher individual volume of Eucalyptus dunnii trees after the application of the dose of 450 g plant-1 of N-P2O5-K2O, 24:00:24 in coverage (T2).

scholarly journals Respiração basal do solo sob três diferentes coberturas vegetais no Paraná

2020 ◽  
Vol 42 ◽  
pp. e101
Author(s):  
Luiz Fernando Veronezi ◽  
Angela Michelato Ghizelini ◽  
Vânia Rossetto Marcelino ◽  
Kátia Cylene Lombardi ◽  
Kelly Geronazzo Martins ◽  
...  
Keyword(s):  
Organic Matter ◽  
Pinus Taeda ◽  
Basal Respiration ◽  
Native Forest ◽  
Forest Types ◽  
Addition Method ◽  
Successional Stage ◽  
Soil Basal Respiration ◽  
Eucalyptus Dunnii ◽  
Cool Dry Season

This study evaluated the soil basal respiration (SBR) of three forest types and seasons and their correlation with pedological attributes in the 0-5 cm land layer. Therefore, we selected two areas of commercial tree species in the central-southern Paraná region: one plot of Pinus taeda and one of Eucalyptus dunnii; and a control, a patch of native forest (Mixed Ombrophyllous Forest). We determined the SBR by the alkaline addition method, incubating the samples for seven days. We collected samples in the cool dry season (winter) and in the hot humid season (summer). Soil attributes were determined by a routine analysis (pH, K+, Ca2+, Mg2+, Al3+, P, Matéria Orgânica, areia grossa e areia fina, silte, argila e V%). We observed significant SBR differences only about summer and winter. SBR correlated significantly with organic matter. These results are similar to most of the literature. There was no difference between the forest types about the SBR, showing that even monoculture forests can present carbon fluxes statistically equal to those of an intermediate successional stage native forest. The specific edaphic fauna adapted to each ecosystem may explain the absence of this difference in relation to SBR.

Biomass Production and Nutritional Efficiency in Eucalyptus Genotypes in the Pampa Biome

2019 ◽  
pp. 1-10
Author(s):  
Claudiney Do Couto Guimarães ◽  
Mauro Valdir Schumacher ◽  
Dione Richer Momolli ◽  
Huan Pablo de Souza ◽  
Aline Aparecida Ludvichak ◽  
...  
Keyword(s):  
Biomass Production ◽  
Eucalyptus Grandis ◽  
Annual Increment ◽  
Utilization Coefficient ◽  
Pampa Biome ◽  
Eucalyptus Dunnii ◽  
Biomass Components ◽  
Mean Annual Increment ◽  
Eucalyptus Urograndis

The objective of this work was to determine biomass production and nutritional efficiency in three eucalyptus genotypes in the Pampa Biome. For determination of biomass and nutritional characterization, nine medium trees per genotype were sampled, separated in the components leaf, branch, bark, wood and root. The nutritional efficiency of the biomass components was determined using the biological utilization coefficient (BUC). The highest biomass production and mean annual increment were observed in the Eucalyptus urograndis hybrid with 158 Mg ha-1 and 47.2 m³ ha-1, followed by Eucalyptus grandis with 137 Mg ha-1 and 39.7 m³ ha-1 and Eucalyptus dunnii with 122 Mg ha-1 and 23.2 m³ ha-1. For wood, the best nutritional efficiency was provided by Eucalytpus urograndis for P, Ca, and Mn, followed by Eucalytpus grandis for N and Mg, and Eucalytpus dunnii for K.

scholarly journals NUTRIENT CYCLING IN EUCALYPTUS DUNNII: MICRONUTRIENTS IN THE LITTERFALL

FLORESTA ◽  
2019 ◽  
Vol 49 (4) ◽  
pp. 641
Author(s):  
Dione Richer Momolli ◽  
Mauro Valdir Schumacher ◽  
Aline Aparecida Ludvichak ◽  
Kristiana Fiorentin Dos Santos ◽  
Huan Pablo De Souza ◽  
...  
Keyword(s):  
Nutrient Cycling ◽  
Leaf Litter ◽  
Deposition Pattern ◽  
Nutrient Return ◽  
Eucalyptus Dunnii ◽  
Temperature Variable ◽  
Transfer Order ◽  
Medium Diameter

The evaluation of litterfall and nutrient return is important for understanding the dynamics of nutrient cycling. Although required in smaller quantities by plants, micronutrients have unique importance in biogeochemical regulation. The objective of the present study was to quantify the litterfall and the concentration of micronutrients in the different fractions and seasons of the year in Eucalyptus dunnii stand. Four plots of 20 m x 21 m were demarcated. The collection of leaf litter, twigs (diameter <0.5 cm) and miscellaneous resulted in the installation of 4 collectors with an area of 0.5 m² in each plot. For the quantification of the thick branches fraction (diameter> 0.5 cm), four useful areas of medium-diameter trees were demarcated in each plot. The leaf fraction represented 59% of litterfall and the transfer order was Mn> Fe> B> Zn> Cu, totaling 8.04 kg ha-1. The leaf fraction presented the highest concentrations for B and Mn. The litterfall was seasonal with summer and spring differing statistically from winter and the temperature variable explains the deposition pattern of the same.

scholarly journals Litterfall deposition and nutrient return in pine-oak forests and scrublands in northeastern Mexico

2019 ◽  
Vol 25 (3) ◽  
Author(s):  
Humberto González-Rodríguez ◽  
Juan Manuel López-Hernández ◽  
Roque Gonzalo Ramírez-Lozano ◽  
Marco Vinicio Gómez-Meza ◽  
Israel Cantú-Silva ◽  
...  
Keyword(s):  
Organic Matter ◽  
Pine Forest ◽  
Oak Forests ◽  
Oak Forest ◽  
Experimental Plot ◽  
Nutrient Input ◽  
Nutrient Return ◽  
Reproductive Structures ◽  
Northeastern Mexico ◽  
Fallen Leaves

Litterfall and its decomposition represents the main nutrient input in forest soils whereby organic matter is cycled, thus influencing the circulation of nutrients in ecosystems. Therefore, the aim of this study was to determine litterfall nutrient-input and deposition via fallen leaves. Litterfall was collected at three sites: 1) a pine-oak forest, 2) an ecotone in a transition zone between a pine-oak forest and a piedmont shrubland, and 3) a thorn scrub in the Tamaulipan thorn-scrub vegetation community. At each site, an experimental plot was selected to allocate ten litter canisters to collect litterfall. Total litterfall deposition was highest at the ecotone, followed by the thorn scrub and the pine-oak forest (hereupon, the pine-oak forest will be referred to as “pine forest” for simplicity) (706.0 g m-2 year-1, 495.6 g m-2 year-1, and 483.0 g m-2 year-1, respectively). Leaf litter abundance was greater than that of twigs, reproductive structures, or miscellaneous components (385.3 g m-2 year-1, 84.6 g m-2 year-1, 55.7 g m-2 year-1, and 35.8 g m-2 year-1, respectively). Total deposition of nutrients (mg m-2 year-1)varied as follows: Ca, from 3.7 (pine forest) to 13.5(thorn scrub); K, from 1.0 (pine forest) to 3.8 (ecotone); Mg, from 0.5 (pine forest) to 1.3 (ecotone); N, from 2.7 (pine forest) to 8.3 (ecotone); P, from 0.1 (pine forest) to 0.3 (ecotone); Cu, from 1.0 (pine forest) to 2.9 (ecotone); Fe, from 35.2 (pine forest) to 89.3 (ecotone); Mn, from 27.7 (pine forest) to 71.8 (ecotone), and Zn from 7.3 (thorn scrub) to 7.8 (ecotone). Litterfall and nutrient input was more abundant during the months of winter than at any other time of the year.

scholarly journals Nutrient Input via Incident Rainfall in a Eucalyptus dunnii Stand in the Pampa biome

2018 ◽  
Vol 25 (3) ◽  
Author(s):  
Grasiele Dick ◽  
Mauro Valdir Schumacher ◽  
Dione Richer Momolli ◽  
Márcio Viera
Keyword(s):  
Nutrient Input ◽  
Pampa Biome ◽  
Eucalyptus Dunnii

scholarly journals Soil degradation due to the conversion of native grassland into cropland in the Pampa biome – (Southern Brazil) and impact on suspended sediment supply to the rivers

2020 ◽  
Author(s):  
Rafael Ramon ◽  
Olivier Evrard ◽  
Tales Tiecher ◽  
Sylvain Huon ◽  
Felipe Bernardi ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Suspended Sediment ◽  
Sediment Source ◽  
Southern Brazil ◽  
Unpaved Roads ◽  
Native Grasslands ◽  
Pampa Biome ◽  
Native Grassland ◽  
Fallout Radionuclide

&lt;p&gt;The conversion of the natural grasslands of the Pampa biome (Southern Brazil) into cropland may lead to an increase in soil erosion rates and sediment delivery to the rivers. Grasslands represent a significant sink of carbon, and according to the literature, 59% of the soil organic carbon (SOC) is lost when pastures are converted into cropland. It makes soils even more vulnerable to water and land degradation. This study aims to evaluate the impact of land use change on the river sediment composition by calculating the sediment contribution of each potential sediment source using organic matter composition, ultra-violet and visible (UV-VIS) spectra derived parameters and fallout radionuclide activities, as potential tracers in a sediment fingerprinting approach. The study site (Ibirapuit&amp;#227; river basin &amp;#8211; 5,942 km&amp;#178;) is located in the Pampa biome, Southern Brazil, were sandy and shallow soils predominate, occupied mainly by native grasslands that are gradually being converted to cropfields, especially soybean. Potential sediment sources were sampled, which include croplands (n=36), native grasslands (n=31), unpaved roads (n=31) and subsurface sources (channel banks (n=18) and gullies (n=16)). Samples were taken from the soil surface layer of croplands and grasslands, as well as from the top layer of exposed sites of gullies, channel banks and unpaved roads. Samples were oven dried (50 &amp;#176;C), gently disaggregated and dry sieved to 63 mm to avoid particle size effects prior to further analysis. Suspended sediment samples were collected using time integrated samplers deployed in the bottom of the river, and during rainfall runoff events at the outlet of the catchment. Organic matter parameters (total organic carbon - TOC, total nitrogen - TN, &amp;#948;&lt;sup&gt;13&lt;/sup&gt;C and &amp;#948;&lt;sup&gt;15&lt;/sup&gt;N) were measured using a continuous flow isotope ratio mass spectrometry (EA-IRMS). Diffuse reflectance spectra in the UV-VIS wavelengths was measured using a Cary 5000 UV-VIS-NIR spectrophotometer, and 33 parameters were derived from the spectra. Fallout radionuclide (&lt;sup&gt;137&lt;/sup&gt;Cs and &lt;sup&gt;210&lt;/sup&gt;Pb&lt;sub&gt;xs&lt;/sub&gt;) activities were measured by gamma spectrometry using low-background high-purity germanium detectors. Tracers were selected following a three step procedure, including: (i) a conservative range test, (ii) a Kruskal&amp;#8211;Wallis H-test, and (iii) a linear discriminant function analysis. The selected tracers were introduced into a mass balance mixing model to estimate the source contributions to in-stream sediment by minimizing the sum of square residuals. TOC and TN show significant differences between cropland and native grassland, while the isotopes &amp;#948;&lt;sup&gt;13&lt;/sup&gt;C and &amp;#948;&lt;sup&gt;15&lt;/sup&gt;N, presented a lower discrimination potential. TOC and UV-VIS derived parameters did not present a good discriminant potential when they were tested in isolation, although they increased the source discrimination when combined with organic matter parameters. Fallout radionuclides have a good discriminant potential between surface and subsurface sources, but also between native grasslands and croplands. Croplands are the main sediment source in the Ibirapuit&amp;#227; river catchment (36%), followed by the native grasslands (33%). However, the area occupied by croplands is approximately eight times smaller, demonstrating that erosion processes have been intensified by the conversion of native grasslands into croplands and/or croplands are better connected to the river network.&lt;/p&gt;

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