Soil Degradation, Restoration and Management: Current Status and Future Challenges

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Soil and Plant Nutrition".

Deadline for manuscript submissions: closed (30 June 2021) | Viewed by 21445

Special Issue Editors


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Guest Editor
University of New South Wales, Sydney, NSW 2052, Australia
Interests: soil C sequestration; soil biology; plant-soil interactions; soil biogeochemistry; soil amendments; soil restoration

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Guest Editor
Environmental Management Laboratory, Mykolas Romeris University, 08303 Vilnius, Lithuania
Interests: forest fires; ecosystem services; soil properties

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Guest Editor
Department of Agroforestry Technology and Science & Genetics, School of Advanced Agricultural & Forestry Engineering, Castilla La Mancha University, Campus Universitario s/n, C.P. 02071 Albacete, Spain
Interests: natural regeneration; soil erosion; forest hydrology; nutrient cycling; soil microbiology; forest management; forest fires
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Special Issue Information

Dear Colleagues,

As an integral part of terrestrial ecosystems, soils provide numerous ecosystem services and support ecosystem functions that include supplying essential nutrients, water, oxygen, and support for plants. Although soils are the result of natural processes, these processes are exceedingly slow and from the perspective of human lifetimes, soils need to be regarded as a non-renewable resource. Inappropriate land uses such as intense land management may critically reduce the ecosystem services and functions provided by soils and result in land degradation through processes such as erosion, sealing or pollution. A sustainable land management and the conservation and restoration of degraded ecosystems is therefore key to maintaining functional soils that can provide multiple ecosystem services.

One of the Sustainable Development Goals recognised by the United Nations (UN) General Assembly is to ‘Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss’. Moreover, the upcoming 2021–2030 decade has been declared as the Decade on Ecosystem Restoration by the UN, setting up new goals for scaling up restoration of degraded ecosystems. However, despite large international efforts in addressing these environmental challenges, further research is needed to design and develop strategies to reduce soil degradation and promote conservation and restoration of soil ecosystems.

In this Special Issue, we welcome contributions covering inter- and transdisciplinary research on soil degradation, conservation, and restoration in the context of a changing global environment through observational, theoretical, and applied studies. Topics of interest include but are not limited to 1) soil degradation by unsustainable land use and inappropriate land management practices, and 2) soil conservation measurements and restoration actions for maintaining ecosystem services and functions (including research, management, education, and policy).

Dr. Miriam Muñoz-Rojas

Prof. Paulo Pereira
Dr. Manuel Esteban Lucas-Borja

Guest Editors

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Keywords

  • soil degradation
  • soil restoration
  • land rehabilitation
  • soil ecosystem services
  • soil function
  • soil carbon
  • soil management

Published Papers (3 papers)

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18 pages, 1183 KiB  
Article
Clinoptilolite Zeolite on Tropical Peat Soils Nutrient, Growth, Fruit Quality, and Yield of Carica papaya L. cv. Sekaki
by Liza Nuriati Lim Kim Choo, Osumanu Haruna Ahmed, Shaidatul Azdawiyah Abdul Talib, Mohamad Zabawi Abdul Ghani and Shamsiah Sekot
Agronomy 2020, 10(9), 1320; https://doi.org/10.3390/agronomy10091320 - 03 Sep 2020
Cited by 9 | Viewed by 3285
Abstract
Papaya cultivation on nutrient deficient acidic peat soils causes poor growth, yield, and fruit quality of this crop. Alkalinity and the high affinity of clinoptilolite zeolite (CZ) for macronutrients could improve pH, nutrient availability, and papaya productivity on peat soils. A one-year field [...] Read more.
Papaya cultivation on nutrient deficient acidic peat soils causes poor growth, yield, and fruit quality of this crop. Alkalinity and the high affinity of clinoptilolite zeolite (CZ) for macronutrients could improve pH, nutrient availability, and papaya productivity on peat soils. A one-year field experiment was conducted to determine the effects of CZ on: (i) soil ammonium, nitrate, P, and K, and (ii) growth, yield, and fruit quality of papaya grown on a peat soil. Treatments evaluated were: (i) different amounts of CZ (25%, 50%, 70%, and 100% of the existing recommended rate of CZ) + NPK fertilizer, and (ii) NPK fertilizer alone. The peat soils with CZ improved pH, ammonium, nitrate, P, and K availability because of the sorption of these nutrients within the structured framework of the CZ. Co-applying CZ (70% to 100%) and NPK fertilizers improved the NPK contents in papaya leaves and the growth, yield, and fruit quality of papaya because of the significant availability of ammonium, nitrate, P, and K in the peat soil for their optimum uptake by the papaya plants. Ability of CZ to buffer the soil pH reduced the need for liming. It is possible to use CZ to improve papaya productivity because CZ can regulate nutrient availability. Full article
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15 pages, 6824 KiB  
Article
Soil, Site, and Management Factors Affecting Cadmium Concentrations in Cacao-Growing Soils
by Daniela Scaccabarozzi, Luis Castillo, Andrea Aromatisi, Lynne Milne, Adolfo Búllon Castillo and Miriam Muñoz-Rojas
Agronomy 2020, 10(6), 806; https://doi.org/10.3390/agronomy10060806 - 05 Jun 2020
Cited by 26 | Viewed by 9601
Abstract
Soil contamination by potentially toxic trace elements (PTEs) such as Cadmium (Cd), is a major environmental concern because of its potential implications to human health. Cacao-based products have been identified as food sources with relatively high Cd contents. Here, we assessed Cd concentrations [...] Read more.
Soil contamination by potentially toxic trace elements (PTEs) such as Cadmium (Cd), is a major environmental concern because of its potential implications to human health. Cacao-based products have been identified as food sources with relatively high Cd contents. Here, we assessed Cd concentrations of cacao-growing soils in four major agricultural regions with contrasting climates in Peru, one of the main exporters of cacao products worldwide. At each study site (n = 40) a broad range of potential factors affecting Cd concentration in soils, i.e., site, soil and management, were evaluated. Concentrations of Cd ranged between 1.1–3.2 mg kg−1. Mean values per region were below 2.7 mg kg−1, usually established as upper-limit for non-polluted soils. Cadmium concentrations were significantly (p < 0.001) higher in sites at higher elevations and in a temperate, drier climate. Cadmium correlated positively with pH (r = 0.57; p < 0.05) and was higher (p < 0.001) in alluvial sediments and Leptosols. Management factors (cacao variety, cultivation year, management practices) and agroecology did not affect Cd concentrations directly. Overall, this study highlights the importance of considering a broad range of both natural and anthropogenic factors to evaluate Cd concentrations in cacao-growing soils and contribute to effective and sustainable cacao production by improving land management and planning. Full article
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15 pages, 1411 KiB  
Perspective
Cyanobacteria as a Nature-Based Biotechnological Tool for Restoring Salt-Affected Soils
by Francisco Rocha, Manuel Esteban Lucas-Borja, Paulo Pereira and Miriam Muñoz-Rojas
Agronomy 2020, 10(9), 1321; https://doi.org/10.3390/agronomy10091321 - 03 Sep 2020
Cited by 25 | Viewed by 7413
Abstract
Soil salinization poses an important threat to terrestrial ecosystems and is expected to increase as a consequence of climate change and anthropogenic pressures. Conventional methods such as salt-leaching or application of soil amendments, or nature-based solutions (NBSs) such as phytoremediation, have been widely [...] Read more.
Soil salinization poses an important threat to terrestrial ecosystems and is expected to increase as a consequence of climate change and anthropogenic pressures. Conventional methods such as salt-leaching or application of soil amendments, or nature-based solutions (NBSs) such as phytoremediation, have been widely adopted with contrasting results. The use of cyanobacteria for improving soil conditions has emerged as a novel biotechnological tool for ecosystem restoration due to the unique features of these organisms, e.g., ability to fix carbon and nitrogen and promote soil stabilisation. Cyanobacteria distribute over a wide range of salt concentrations and several species can adapt to fluctuating salinity conditions. Their application in agricultural saline soil remediation has been demonstrated, mostly in laboratory studies, but there is a lack of research regarding their use in natural ecosystems restoration. In this article, we provide an overview of the current knowledge on cyanobacteria in the context of ecosystem restoration. Examples of the application of cyanobacteria in alleviating salt-stress in plants and soils are presented. Furthermore, we acknowledge gaps regarding the extensive application of cyanobacteria in salt-affected soils remediation and discuss the challenges of NBSs in salt-affected soils restoration. Full article
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