Dynamics of aboveground biomass accumulation in monospecific and mixed-species plantations of Eucalyptus and Acacia on a Brazilian sandy soil

Santos, Felipe Martini; Balieiro, Fabiano de Carvalho; Ataíde, Danilo Henrique dos Santos; Diniz, Anderson Ribeiro; Chaer, Guilherme Montandon

doi:10.1016/j.foreco.2015.12.028

Cited by 49 publications

(17 citation statements)

References 46 publications

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“…Our work shows that mixed species plantings do not necessarily overyield (i.e., have higher growth), or have higher transpiration and WUE when compared to their respective monocultures, suggesting that selecting species based on information about their complementary functional traits alone is not sufficient to ensure overyielding. Findings from other studies suggests that combining species with similar growth rates may enhance the probability of complementary interactions leading to overyielding early in stand development, but that these interactions can be diminished if one species growth begins to limit the height of the second species [61]. We also demonstrated the effect that a dominant species can have on a less strongly competitive species 6-8 years following plantation establishment, with negative effects on growth, both during normal and drought years.…”

Section: Discussionsupporting

confidence: 57%

Drought Differentially Affects Growth, Transpiration, and Water Use Efficiency of Mixed and Monospecific Planted Forests

Sinacore

Asbjornsen

Hernández‐Santana

et al. 2019

Forests

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Drought conditions may have differential impacts on growth, transpiration, and water use efficiency (WUE) in mixed species and monospecific planted forests. Understanding the resistance (i.e., the capacity to maintain processes unchanged) of different tree species to drought, and how resistance is affected by complementary interactions within species mixtures, is particularly important in the seasonally dry tropics where projected increases in the frequency and severity of drought threaten tree planting efforts and water resources. Complementary interactions between species may lead to more resistant stands if complementarity leads to greater buffering capacity during drought. We examined growth, transpiration, and WUE of mixtures and monocultures of Terminalia amazonia (J.F. Gmel.) Exell and Dalbergia retusa Hemsl. before and during a prolonged drought using intensive measurements of tree sap flow and growth. Tree sapwood area growth was highest for T. amazonia in mixtures during normal (6.78 ± 4.08 mm2 yr−1) and drought (7.12 ± 4.85 mm2 yr−1) conditions compared to the other treatments. However, stand sapwood area growth was greatest for T. amazonia monocultures, followed by mixtures, and finally, D. retusa monocultures. There was a significant decrease in stand transpiration during drought for both mixtures and T. amazonia monocultures, while Dalbergia retusa monocultures were most water use efficient at both the tree and stand level. Treatments showed different levels of resistance to drought, with D. retusa monocultures being the most resistant, with non-significant changes of growth and transpiration before and during drought. Combining species with complementary traits and avoiding combinations where one species dominates the other, may maximize complementary interactions and reduce competitive interactions, leading to greater resistance to drought conditions.

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Section: Discussionsupporting

confidence: 57%

Drought Differentially Affects Growth, Transpiration, and Water Use Efficiency of Mixed and Monospecific Planted Forests

Sinacore

Asbjornsen

Hernández‐Santana

et al. 2019

Forests

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“…The height, biomass, and leaf area of seedlings were significantly decreased with an increase in the concentration of leaf AE (p < 0.05), which may be the physio-morphological reaction to the autotoxic compounds contained in leaves on the seedlings [39]. This is similar to the findings in a study on biomass accumulation with the allelopathy of Eucalyptus [40]. Contrary to leaf AE treatment, pericarp AE , seed AE , and branch AE treatments showed different degrees of promotion of seedling growth.…”

Section: Seedling Growth and Antioxidant System Responses To Aqueous supporting

confidence: 82%

Autotoxicity Hinders the Natural Regeneration of Cinnamomum migao H. W. Li in Southwest China

Huang

Jing-zhong

Liu

et al. 2019

Forests

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Autotoxicity is a widespread phenomenon in nature and is considered to be the main factor affecting new natural recruitment of plant populations, which was proven in many natural populations. Cinnamomum migao H. W. Li is an endemic medicinal woody plant species mainly distributed in Southwestern China and is defined as an endangered species by the Red Paper of Endangered Plants in China. The lack of seedlings is considered a key reason for population degeneration; however, no studies were conducted to explain its causes. C. migao contains substances with high allelopathic potential, such as terpenoids, phenolics, and flavonoids, and has strong allelopathic effects on other species. Therefore, we speculate that one of the reasons for C. migao seedling scarcity in the wild is that it exhibits autotoxic allelopathy. In this study, which was performed from the perspective of autotoxicity, we collected leaves, pericarp, seeds, and branches of the same population; we simulated the effects of decomposition and release of litter from these different anatomical parts of C. migao in the field; and we conducted 210-day control experiments on seedling growth, with different concentration gradients, using associated aqueous extracts. The results showed that the leaf aqueous extract (leafAE) significantly inhibited growth indicators and increased damage of the lipid structure of the cell membrane of seedlings, suggesting that autotoxicity from C. migao is a factor restraining seedling growth. The results of the analyses of soil properties showed that, compared with the other treatments, leafAE treatment inhibited soil enzyme activity and also had an impact on soil fungi. Although leafAE could promote soil fertility to some extent, it did not change the effect of autotoxic substances on seedling growth. We conclude that autotoxicity is the main obstacle inhibiting seedling growth and the factor restraining the natural regeneration of C. migao.

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“…Mixed eucalyptus plantations in sandy and mediumtextured soils, with N 2 -fixing leguminous trees, such as Acacia mangium Willd., have favored the supply of N (especially nitrate), the indices of soil microbial diversity and evenness, soil C stocks, and wood production (Balieiro et al, 2008b;Rachid et al, 2013Rachid et al, , 2015Santos et al, 2016). These benefits are possibly related to the biological N 2 fixation provided by A. mangium.…”

Section: Planted Forestsmentioning

confidence: 99%

Characterization, agricultural potential, and perspectives for the management of light soils in Brazil

Donagemma

Freitas

Balieiro

et al. 2016

Pesq. agropec. bras.

Self Cite

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-Light soils occupy 8% of the Brazilian territory and are especially expressive in the new and last agricultural frontier in Brazil: the Matopiba region -in the states of Maranhão, Tocantins, Piauí, and Bahia -, where they represent 20% of the area. These soils fit into the textural classes of sand and loamy sand or sandy loam, down to 0.75-m soil depth or deeper, and they are mainly represented by Neossolos Quartzarênicos (Quartzipsamments) and, partly, by Latossolos (Oxisols) and Argissolos (Ultisols). The understanding of soil functioning depends on the establishment of distinguishing criteria for: organic matter dynamics; content and mineralogy of the clay fraction; coarse sand and total sand contents, in relation to those of fine sand; mean diameter of the sand fraction; and water retention capacity. These criteria can contribute for the zoning and for the conservation and fertility management of light soils, as well as for the estimation of their agricultural potential. Integrated production systems, such as crop-livestock and crop-livestock-forestry integration, besides no-tillage with crop rotation, mixed forestry planting with legumes, and the use of green manure and cover crops are relevant for the proper management of these soils. The objective of this review was to characterize light soils and to highlight the main challenges regarding their agricultural potential and their conservation and fertility managements, in face of the expansion and consolidation of the new Brazilian agricultural frontier.

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Dynamics of aboveground biomass accumulation in monospecific and mixed-species plantations of Eucalyptus and Acacia on a Brazilian sandy soil

Cited by 49 publications

References 46 publications

Drought Differentially Affects Growth, Transpiration, and Water Use Efficiency of Mixed and Monospecific Planted Forests

Drought Differentially Affects Growth, Transpiration, and Water Use Efficiency of Mixed and Monospecific Planted Forests

Autotoxicity Hinders the Natural Regeneration of Cinnamomum migao H. W. Li in Southwest China

Characterization, agricultural potential, and perspectives for the management of light soils in Brazil

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