Crescimento E Produtividade De Povoamentos Monoespecíficos E Mistos De Eucalipto E Acácia-Negra

Viera, Márcio; Schumacher, Mauro Valdir; Liberalesso, Edenilson

doi:10.5216/pat.v41i3.10760

Cited by 10 publications

(5 citation statements)

References 14 publications

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“…Mixed-species did not improve the diameter growth of individual A. cincinnata tree in relation to its monospecific planting and accompanying tree species. This result is similar with previous studies that demonstrated lack of significant differences in diameter growth of E. urograndis and A. mearnsii in different arrangements of monospecifc and mixed-species planting at the age of 18 months [31]. In a study made to examine the growth of E. camaldulensis and Leucaena leucocephala in monospecifc and mixed-species planting systems, the growth in DBH did not show significant difference between the different planting systems, which indicates that there is a lack of positive or negative interspecifc interactions that favored the growth in DBH of both species in different planting arrangements [32].…”

Section: Effects Of Species Mixture On the Growth Of Acacia Cincinnatasupporting

confidence: 93%

Effects of Species Mixture on Growth, Biomass of Understory Vegetation, Soil Properties, and Bacterial Diversity of Acacia cincinnata Plantation

Li¹,

Sun²,

Wang³

et al. 2023

Preprint

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Establishment of mixed-forests has gained increasing attention as a way to optimize forest production, to improve ecological benefits and as a safety net for impacts of future climate uncertainties. However, practical knowledge about which species and what proportion of them should be mixed is still lacking. Thus, this study was conducted with the aim of identify suitable species for mixture with Acacia cincinnata. The mixture tested in the present study was A. cincinnata + Eucalyptus robusta (6:4), A. cincinnata + Acacia mangium (3:1) and monospecifc plantation of A. cincinnata established in 2014. After 7 years of growth, we analyzed the effects of species mixture on growth of tree species, understory vegetation and soil physico-chemical properties as well as bacterial community structure and diversity. The results showed that species mixture had no significant effect on growth characteristics, such as diameter and singletree volume of A. cincinnata. However, mixed-species planting increased the total stocking volume compered to monospecific plantation of A. cincinnata. Furthermore, stand mixture significantly increased species diversity, biomass and nutrient stocks in the understory vegetation. The soil of mixed stand of A. cincinnata and A. mangium had the highest C and N contents, whereas the soil of pure A. cincinnata stand had the highest P content. The diversity of soil bacterial community were the highest in the mixed stand of A. cincinnata and E- robusta, followed by pure A. cincinnata stand and A. cincinnata + A. mangium stand. The relative abundance of Proteobacteria and Actinobacteria was higher in soils of mixed stands. Furthermore, the relative abundance of Firmicutes was high in the soil of A. cincinnata + A. mangium while the relative abundance of Verrucomicrobia was high in A. cincinnata + E. robusta stand. As a whole, the study demonstrated that establishing mixed-species plantation enhance the diversity and composition of understory vegetation, soil physico-chemical and soils bacterial community; thereby increasing biodiversity, nutrient cycling and carbon sequestration in the biomass and soil. From the viewpoints of forest productivity and ecological benefits, it is advisable to establish a mixed plantation of A. cincinnata and A- mangium in southern China. As a whole, our work revealed that the sustainability of mixed-species plantation relies on the interactions between soil attributes, vegetation, and bacterial community.

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Section: Effects Of Species Mixture On the Growth Of Acacia Cincinnatasupporting

confidence: 93%

Effects of Species Mixture on Growth, Biomass of Understory Vegetation, Soil Properties, and Bacterial Diversity of Acacia cincinnata Plantation

Li¹,

Sun²,

Wang³

et al. 2023

Preprint

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“…A maioria dos estudos sobre os plantios monoespecíficos ou mistos desses gêneros tiveram o objetivo de avaliar as características de crescimento das árvores (Forrester et al, 2004;Vieira et al, 2011). Alguns estudos têm sido realizados com o intuito de comparar a qualidade da madeira e do teor de casca produzidos por plantios monospecíficos e consorciados.…”

Section: Introductionunclassified

Lenho e Casca de Eucalyptus e Acacia em Plantios Monoespecíficos e Consorciados

et al. 2017

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RESUMOO objetivo deste estudo foi avaliar a variação do teor e espessura da casca e da densidade básica da madeira de Eucalyptus e Acacia plantados em monocultivo e consórcio. Cinco árvores de Eucalyptus urophylla × E. grandis e cinco de Acacia mangium foram investigadas em plantios monoespecíficos e mistos, totalizando 20 árvores. O teor e espessura da casca produzida pela Acacia em monocultivo (47,5% e 1,32 cm) foram aproximadamente três vezes superiores, quando comparadas àquelas do plantio consorciado (15,2% e 0,51 cm). A partir desses resultados, conclui-se que não há diferença significativa entre as médias da densidade básica das madeiras de Eucalyptus e Acacia provenientes dos plantios monoespecíficos e mistos. Contudo, há variação longitudinal significativa em termos de densidade básica da madeira das árvores de Acacia e de Eucalyptus provenientes tanto do plantio monocultivado como do consorciado, indicando que há diferença na qualidade da madeira manejada para uso múltiplo.Palavras-chave: monocultivo, plantio misto, floema, xilema, densidade, madeira. Wood and Bark of Eucalyptus and Acacia in Pure and Mixed Stands ABSTRACTThis study aimed to evaluate the variation of the bark content and thickness, and wood basic density of Eucalyptus and Acacia planted in pure and mixed stands. Five trees of Eucalyptus urophylla × E. grandis and Acacia mangium were investigated in pure and mixed stands, totaling 20 trees. The content and thickness of the bark produced by Acacia in monoculture (47.5% and 1.32 cm) were approximately three times higher than those from mixed stand (15.2% and 0.51 cm). From these results, it can be concluded that there is no significant mean difference between the density for Eucalyptus and Acacia wood from the pure and mixed plantings. However, there is significant longitudinal variation of basic density of Acacia and Eucalyptus wood from pure and mixed stand, indicating differences in the wood quality from logs managed for multiple use.

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“…Faria et al (2013) found an average diameter at breast height of 6.2 cm in plants of E. urophylla x E. grandis at 18 months, which is lower when compared to the one found in our study (7.3 cm). Vieira and Valdir (2011) observed in a study with the same species and age an average diameter at breast height greater than 8.0 cm. Thus, the results obtained in this study are close to the findings in the literature.…”

Section: Methodsmentioning

confidence: 82%

Silvicultural performance of eucaliptus and animal behavior in a silvopastoral system

et al. 2019

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Silvopastoral system, in which trees and forage species are grown in the same area together with animals, has emerged as a sustainable alternative of agricultural production systems. However, information on different silvicultural arrangements and combinations of forest, animal and grazing components in this system are still scarce. Thus, this study followed the silvicultural performance of the forest component (Eucalyptus urophylla x E. grandis, eucalyptus hybrid, clone I-144) under different population arrangements in a silvopastoral system through periodic dendrometric evaluations and determined the impact of animal component (Nellore females) on tree development and ingestive behavior of animals subjected to rotational grazing in Urochloa brizantha cv. Marandu. The study was conducted at Agropecuária Ouro Branco, located in Bandeirantes, MS, Brazil. Total height, diameter at breast height, and wood volume per hectare were evaluated in three-and five-row ranks. To indicate plant growth, the current and average annual increments were calculated. Animal behavior was evaluated based on the periodic observation of 15 animals randomly selected in the lot. The initial performance of forest component was satisfactory in both populations, but growth indicators indicated greater current and average annual increments in the five-row rank. The presence of forest component does not interfere with the ingestive behavior and wellbeing of animals in the silvopastoral system, as well as, the presence of animal component does not interfere in the plants silvicultural development.

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Crescimento E Produtividade De Povoamentos Monoespecíficos E Mistos De Eucalipto E Acácia-Negra

Cited by 10 publications

References 14 publications

Effects of Species Mixture on Growth, Biomass of Understory Vegetation, Soil Properties, and Bacterial Diversity of Acacia cincinnata Plantation

Effects of Species Mixture on Growth, Biomass of Understory Vegetation, Soil Properties, and Bacterial Diversity of Acacia cincinnata Plantation

Lenho e Casca de Eucalyptus e Acacia em Plantios Monoespecíficos e Consorciados

Silvicultural performance of eucaliptus and animal behavior in a silvopastoral system

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