Effects of the planting of legume species and soil conditions on the recovery of a sand and pebble mining area

Effects of the planting of legume species and soil conditions on the recovery of a sand and pebble mining area

Extensive areas have been degraded worldwide through mineral extraction. Mining class II, especially sand and pebble mining (gravel extraction), has grown significantly in Brazilian Amazonia mainly in the State of Pará. In this context, the development of suitable and efficient recovery techniques i...

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Bibliographic Details
Published in:Land degradation & development Vol. 32; no. 4; pp. 1695 - 1705
Main Authors: Souza Rocha, Rauny, Monteiro, Victor Freitas, Abreu, Luiz Carlos Pantoja Chuva, Fernandes, Ana Paula Donicht, Santos, Cassio Rafael Costa
Format: Journal Article
Language:English
Published: Chichester, UK John Wiley & Sons, Ltd 28-02-2021
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Subjects:
Environmental restoration
Fertility
Germination
Gravel
green manure
Hydrogels
Jack beans
Legumes
Mining
Mucuna pruriens
plant species growth
Recovery
Restoration
Sand
Soil conditions
Soil degradation
soil fertility
Soil testing
Soils
Substrates
Topsoil
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Summary:Extensive areas have been degraded worldwide through mineral extraction. Mining class II, especially sand and pebble mining (gravel extraction), has grown significantly in Brazilian Amazonia mainly in the State of Pará. In this context, the development of suitable and efficient recovery techniques is necessary to ensure mined land restoration. The objective of this study was to evaluate the effects of different types of management and green manure methods to recover degraded soil after the mining of pebbles and sand. The experiment was implemented in the northern region of the municipality of Capitão Poço, State of Pará. The procedures we used were: a randomized block design experiment, with a 4 × 3 factorial arrangement. Four legume species were tested: Cajanus cajan (L.), Canavalia ensiformis (L.) DC, Crotolaria juncea (L.), and Mucuna pruriens (L.); in addition, three soil conditions were also tested: exposed soil, topsoil, and hydrogel. Results of the analyses showed how the root collar diameter, stem length, fertility, germination, green and dry biomass varied; the variable topsoil had better results when compared to the samples that used hydrogel and those established on exposed soil in practically all the mean comparisons for isolated factors. Besides this, C. ensiformis (L.) DC and M. pruriens (L.) showed a better development, especially when grown in soils with topsoil deposition as a reconformed substrate. From these studies we conclude that the use of this substrate is to be recommended. C. ensiformis (L.) DC and M. pruriens (L.) are also recommended for restoration.
ISSN:1085-3278
1099-145X
DOI:10.1002/ldr.3805