Soil water dynamics and litter production in eucalypt and native vegetation in southeastern Brazil

Silva, Paulo Roberto Arbex; Poggiani, Fábio; Lima, Walter de Paula; Libardi, Paulo Leonel

doi:10.1590/0103-9016-2013-0325

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…This pattern corroborated the results observed in an Amazon-Cerrado Transition Forest in Mato Grosso (Silva et al, 2009) and in different physiognomies of Cerrado (Cianciaruso et al, 2006;Giácomo et al, 2012). Higher litterfall influenced by higher leaf fall during the dry season occurs for many tree species as a strategy to overcome water deficit (Silva et al, 2014).…”

Section: /9supporting

confidence: 88%

Litterfall and Nutrient Input in a Degraded Area

et al. 2017

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This study aimed to test the effects of fertilization with organic compost from industrial production of pulp on the litterfall and nutrient input of monospecific plantations in a loan area. The treatments consisted of three doses of the organic compost D 10 , D 15 and D 20 (10, 15 and 20 Mg ha -1 , respectively), mineral conventional fertilization (D AM ) and no fertilization (D 0 ) in land plots (N = 4/treatment/species; 15 x 12 m). Litterfall was monthly collected by two traps (0.72 m 2 /plot) and sorted out into leaves, twigs, seeds, flowers, fruits and others. We determined the input of nitrogen, phosphorous and potassium. There were no differences among the treatments and between species in terms of total annual litterfall. The higher nutrient input was obtained by D AM, followed by D 10 , in both plantations. The annual nutrient input was higher for the litterfall on the E. urograndis plantation.

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Section: /9supporting

confidence: 88%

Litterfall and Nutrient Input in a Degraded Area

et al. 2017

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“…In recent decades, significant increases in productivity have been obtained through Eucalyptus taxa selection and breeding, plant protection and management practices (Gonçalves et al, 2013). However, there are concerns about the environmental impacts of commercial eucalypt stands (Silva et al, 2014). One major concern is eucalypt invasion which may happen in any ecosystem when favourable conditions occur (Larcombe et al, 2013;Tererai et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Assessing the invasive potential of commercial Eucalyptus species in Brazil: Germination and early establishment

Silva

Bouillet

Paula

2016

Forest Ecology and Management

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The invasive potential of a species is related to the interaction between genetic and environmental characteristics, as climatic conditions and native vegetation, reflecting the species adaptation to local conditions. An ecologically-adapted alien species can alter diversity and structure of forest ecosystems. This study assessed the invasiveness potential of eight commercially important Eucalyptus species in the germination and early establishment phases in southeastern Brazil. The first experiment evaluated seed germination under controlled temperature and air humidity conditions testing six substrate water potentials. The second experiment was conducted in pots to evaluate seed germination and seedling mortality under rainfed and irrigated regimes. Nine field trials were set up in the third experiment in six locations. In each trial, 80 plots of 1 m 2 were installed with half the plots undisturbed and half where preexisting plants and litter were removed. In the first experiment, Eucalyptus taxa differed significantly in seed germination for substrate water potential PÀ0.6 MPa. No germination was found for any taxa at À0.8 MPa substrate water potential. In the second experiment, differences in germination between species and water treatments were observed 21 days after sowing. No mortality was found in the irrigated treatments. No seedling mortality was observed in the rainfed treatments when the relative air humidity was higher than 85%, even during a dry period of 45 days. By contrast, seedling mortality was observed for all taxa in all the rainfed treatments when relative air humidity fell under 80%. In the third experiment, germination and seedling establishment of Eucalyptus species was always very low. The non-Eucalyptus species showed differences in germination between trials and soil exposures. Our results showed that soil and air moisture were major drivers of eucalypt germination and initial establishment in controlled conditions. However, under field conditions additional factors such as competition of non-Eucalyptus species and seedlings predation drastically limited eucalypt establishment suggesting low ecological adaptation of Eucalyptus sp. as an invasive species.

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“…According to Table 1, the soil used in this work has sandy characteristics. Sandy soils have lower water retention when compared to clayey soils because they have a higher frequency of pore size with radii greater than 0.03 mm (Libardi, 2018;Silva et al, 2014), this means that higher energy needs to be used to remove water from these soils (Ekwue & Seepersad, 2015;Zambon et al, 2021), so it is important that in case of repetitions of this methodology for clayey soils, the same results will not be found.…”

Section: Discussionmentioning

confidence: 99%

Determination of Soil Moisture for Sandy Soils Using Gas and Microwave Ovens

Assunção,

José,

Batista da Silva

et al. 2023

JAS

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Since there are several methods used to determine soil moisture, the objective was to compare the moisture values obtained with the use of a gas oven and a microwave to the values obtained with the standard oven method. Having been carried out at the Hydraulics Laboratory of the State University of Maringá, Umuarama Regional Campus, the performance of the methods was evaluated in the determination of five levels of moisture (10, 15, 20, 25, and 30%), with dry masses obtained at 15, 20, 25 and 30 minutes for the gas oven and at 2, 4, 6 and 8 minutes for the microwave. The best drying times were selected using the Taylor Diagram. Linear regression was performed between the methods, in order to obtain the correlation coefficient (r), the Willmott agreement index (d), the performance index (c), absolute error (EA), absolute mean error (ERA), and root mean square error (RQME). By analyzing the results obtained, it can be stated that the gas oven method and the microwave method presented excellent performance when compared to the standard method. It was also concluded that the time of 25 minutes for the gas oven method was efficient and, for the microwave method, the drying time of 8 minutes was sufficient, meaning a reduction in the time for moisture determination.

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Soil water dynamics and litter production in eucalypt and native vegetation in southeastern Brazil

Cited by 6 publications

References 22 publications

Litterfall and Nutrient Input in a Degraded Area

Litterfall and Nutrient Input in a Degraded Area

Assessing the invasive potential of commercial Eucalyptus species in Brazil: Germination and early establishment

Determination of Soil Moisture for Sandy Soils Using Gas and Microwave Ovens

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