Green Manure as an Alternative for Soil Recovery in a Bauxite Mining Environment in Southeast Brazil

Fonseca, Wesley da Silva; Martins, Sebastião Venâncio; Villa, Pedro Manuel

doi:10.1590/2179-8087-floram-2023-0041

Floresta Ambient.

2023

DOI: 10.1590/2179-8087-floram-2023-0041

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Green Manure as an Alternative for Soil Recovery in a Bauxite Mining Environment in Southeast Brazil

Wesley da Silva Fonseca

Sebastião Venâncio Martins

Pedro Manuel Villa

Abstract: The objective of this study was to evaluate plant cover and dry mass produced by green manures and their influence on the chemical attributes of soil for the ecological restoration of an area around bauxite mine environment in Southeast Brazil. Soil preparation, chemical fertilization and sowing of three species of green manures were carried out: Cajanus cajan, Crotalaria juncea and Stylosanthes guianensis. In general, C. cajan and C. juncea showed the best performance in plant cover. C. cajan and S. guianensi… Show more

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Cited by 2 publications

References 57 publications

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Complementing seedling planting with nucleation techniques increases forest restoration potential in areas around bauxite mining

Fonseca,

Martins,

Fioresi

et al. 2024

Land Degrad Dev

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The soil seed bank is one of the most important ecological indicators to evaluate and monitor the ecological restoration process of plant communities. We aimed to analyze the influence of two different ecological restoration techniques on the diversity and floristic composition of the soil seed bank and of standing vegetation, in two 4‐year‐old areas under forest restoration around bauxite mining, Southeast Brazil. A total of 30 soil samples were collected in each area (SPN—forest restoration by seedling planting in rows and nucleation techniques between planting rows and SP—forest restoration by seedling planting in rows). The samples were transported to a shade house and evaluated for 6 months, where germinated individuals were counted and identified weekly. A floristic census of shrub/tree species was conducted to assess the diversity of standing vegetation. The results indicated that the soil seed banks of the two areas are floristically similar (predominance of pioneer, herbaceous, and native origin species). The two restoration techniques did not differ in their effects on the species composition of the soil seed bank, mainly due to the restoration age. However, when analyzing the standing vegetation, 38 species were recorded in SPN, while only 20 species were in SP. This result demonstrates that nucleation techniques contributed to the increase in species diversity in SPN. We conclude that combining seedling planting in rows with nucleation techniques (topsoil transposition, direct seeding, and artificial perches) can enhance species diversity in standing vegetation, improve forest functionality, and consequently enhance the potential for forest restoration.

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Complementing seedling planting with nucleation techniques increases forest restoration potential in areas around bauxite mining

Fonseca,

Martins,

Fioresi

et al. 2024

Land Degrad Dev

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Long-Term Integrated Systems of Green Manure and Pasture Significantly Recover the Macrofauna of Degraded Soil in the Brazilian Savannah

Bonini,

Maciel,

Moreira

et al. 2023

Soil Systems

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Healthy soil biota is the key to meeting the world population’s growing demand for food, energy, fiber and raw materials. Our aim is to investigate the effect of green manure as a strategy to recover the macrofauna and the chemical properties of soils which have been anthropogenically degraded. The experiment was a completely randomized block design with four replicates. Green manure, Urochloa decumbens, with or without application of limestone and gypsum, composed the integrated systems. The macroorganisms as well as the soil fertility were analyzed after 17 years of a process of soil restoration with the aforementioned systems. The succession of Stizolobium sp. with Urochloa decumbens, with limestone and gypsum, was teeming with termites, beetles and ants. This integrated system presented the most technically adequate indexes of diversity and uniformity. Multivariate models showed a substantial increase in the total number of individuals due to the neutralization of harmful elements and the gradual release of nutrients by limestone and plaster. These conditioners have undergone multiple chemical reactions with the substrate in order to balance it chemically, thus allowing the macroinvertebrates to grow, develop, reproduce and compose their food web in milder microclimates. It was concluded that the integration of green manure together with grass is an economical and environmentally correct strategy to restore the macrofauna properties of degraded soil in the Brazilian savannah.

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Green Manure as an Alternative for Soil Recovery in a Bauxite Mining Environment in Southeast Brazil

Cited by 2 publications

References 57 publications

Complementing seedling planting with nucleation techniques increases forest restoration potential in areas around bauxite mining

Complementing seedling planting with nucleation techniques increases forest restoration potential in areas around bauxite mining

Long-Term Integrated Systems of Green Manure and Pasture Significantly Recover the Macrofauna of Degraded Soil in the Brazilian Savannah

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