NDLI: Lake-dredged material (LDM) in pedotechnique for the restoration of Mediterranean soils affected by erosion/entisolization processes

Content Provider	Springer Nature Link
Author	Capra, Gian Franco Grilli, Eleora Macci, Cristina Vacca, Sergio Masciandaro, Grazia Ceccanti, Brunello Bondi, Giulia Duras, Maria Giustina Dessena, Maria Antonietta Marras, Gabriele Gavia, Carla Buondon, Andrea
Copyright Year	2014
Abstract	Anthropic-accelerated erosion processes have led to an increase in reported loss of soil surface horizons worldwide. Lake-dredged materials (LDMs) have often been considered suitable for upland disposal. This study aimed to assess the potential beneficial use of LDMs in soil rebuilding strategies for Mediterranean soils affected by the loss of surface horizons with consequent erosion/entisolization processes.Different model proto-horizons (MPHs) were assembled by means of the co-utilization of LDMs, other mineral matrices, organic amendment, and mineral fertilizer for the growth of a pasture grass under controlled (pot) conditions. The evolution of nine different MPHs was monitored by means of an evaluation/comparison of several physical–chemical parameters (texture, pH, electrical conductivity, N, P, K, and cation-exchange capacity) and the stability-modification of organic matter (OM) quality in relation to plant development (dry matter production, agronomic efficiency, and plant cover).The addition of LDM resulted in statistically significant (p < 0.05) improvement to both plant performance and several soil physical–chemical properties. Compared with the reference soil (degraded soil without any additional treatment), the model proto-horizons treated with the highest LDM content (50 % w LDM without any additional treatment) showed the largest total dry matter production, the highest agronomic efficiency, and a quali-quantitative increase in plant cover. A more balanced texture (loamy) and a generalized increase in total organic carbon, cation-exchange capacity, N, and K were also detected with particular reference to models treated with the higher LDM content. Humic substances greatly increased in the treatment with the higher LDM amounts showing a generalized soil organic matter equilibrium, i.e., no mineralization or humification process prevalence.This study showed that there is indeed the possibility of turning what is currently an awkward refuse material into a commodity that can be properly and advantageously used in pedotechniques for soil rebuilding and land recovery and protection. From this standpoint, LDM would appear to be apt for inclusion on a possible list of useful pedotechnomaterials.
Starting Page	32
Ending Page	46
Page Count	15
File Format	PDF
ISSN	14390108
Journal	Journal of Soils and Sediments
Volume Number	15
Issue Number	1
e-ISSN	16147480
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-08-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dredged materials Entisolization Pedotechnique Pedotechnomaterials Soil erosion Soils Soil Science & Conservation Environment Environmental Physics
Content Type	Text
Resource Type	Article
Subject	Stratigraphy Earth-Surface Processes

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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