Fertilization of Pinus taeda L. on an acidic oxisol in southern Brazil: growth, litter accumulation, and root exploration

Consalter, Rangel; Motta, Antônio Carlos Vargas; Barbosa, Julierme Zimmer; Vezzani, Fabiane Machado; Rubilar, Rafael; Nisgoski, Silvana; Bassaco, Marcos Vinícius Martins

doi:10.1007/s10342-021-01390-z

Cited by 10 publications

(1 citation statement)

References 65 publications

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“…Although P. taeda and E. urograndis are not native to Brazil. In fact, Brazil has extensive areas planted with these tree species (Consalter et al, 2021; da Cunha et al, 2021) – about 1.6 million hectares planted with Pinus (70% of which P. taeda ) and 7.5 million hectares with Eucalyptus sp (Ibá, 2021). For these plantations, stemflow production at the hectare scale produces 3,760,000 metazoans ha −1 y −1 for P. taeda and 1,510,000 metazoans ha −1 y −1 for E. urograndis .…”

Section: Discussionmentioning

confidence: 99%

Stemflow metazoan transport from common urban tree species (São Paulo, Brazil)

et al. 2022

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For precipitation to reach the surface of vegetated ecosystems, it must first pass through the canopy. A portion of precipitation, stemflow, drains down branches to the stem. This stemflow may wash canopy-dwelling animals (metazoans) into the litter and soils below; however, stemflow metazoans transport has typically been ignored in past research. In fact, the visual presence of metazoans in stemflow collection bins was reported as "contamination" in past research. Thus, we know little about these organisms' transfer from plant canopies to the surface. To investigate this topic, we monitored metazoan concentrations and composition within stemflow that drained from eight urban tree species (n = 3 per species) over 12 months. Annual (±SE) stemflow recorded from all 24 sampled trees was 19.6 (±3.3) mm (2.3% rainfall). Analysis of 288 samples found 1,307 individuals distributed into seven classes (16 orders) and one organism at phylum level. Considering all trees (n = 24), the annual mean metazoan density in stemflow was 8.6 individuals L À1 . Among tree species, there were considerable variations, ranging from 1.0 to 17 individuals L À1 .Annual metazoan transport per tree ranged from 20 to 376 individuals m À2 y À1 . The most common taxa observed in stemflow from this site included Arachnida (10%), Collembola (33%) and Insecta (56%). Variability in metazoan density within and across species was high, but individual trees with the highest metazoan stemflow density and flux were those with large diameter and exfoliating bark structure. This study demonstrates that stemflow can transport a substantial and diverse meso-and macro-fauna to the surface of urban forests. Future work may be merited on the fate and/or role of these metazoans in litter and soil systems.

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Section: Discussionmentioning

confidence: 99%

Stemflow metazoan transport from common urban tree species (São Paulo, Brazil)

et al. 2022

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Effects of climate and soil properties on growth of Pinus pinea young plantations

Loewe-Muñoz,

Bonomelli,

del Río

et al. 2024

Plant Soil

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Is magnesium deficiency the major cause of needle chlorosis of Pinus taeda in Brazil?

Motta,

Maeda,

Rodrigues

et al. 2023

J. For. Res.

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Needle chlorosis (NC) in Pinus taeda L. systems in Brazil becomes more frequent after second and third harvest rotation cycles. In a study to identify factors contributing to yellowing needle chorosis (YNC), trees were grown in soils originating from contrasting parent materials, and soils and needles (whole, green and chlorotic portions) from 1- and 2-year-old branches and the first and second needle flush release at four sites with YNC on P. taeda were analyzed for various elements and properties. All soils had very low base levels (Ca2+, Mg2+ and K+) and P, suggesting a possible lack of multiple elements. YNC symptoms started at needle tips, then extended toward the needle base with time. First flush needles had longer portions with YNC than second flush needles did. Needles from the lower crown also had more symptoms along their length than those higher in the canopy. Symptoms were similar to those reported for Mg. In chlorotic portions, Mg and Ca concentrations were well below critical values; in particular, Mg levels were only one third of the critical value of 0.3 g kg−1. Collectively, results suggest that Mg deficiency is the primary reason for NC of P. taeda in various parent soils in Brazil.

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Fertilization of Pinus taeda L. on an acidic oxisol in southern Brazil: growth, litter accumulation, and root exploration

Cited by 10 publications

References 65 publications

Stemflow metazoan transport from common urban tree species (São Paulo, Brazil)

Stemflow metazoan transport from common urban tree species (São Paulo, Brazil)

Effects of climate and soil properties on growth of Pinus pinea young plantations

Is magnesium deficiency the major cause of needle chlorosis of Pinus taeda in Brazil?

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