Type and quantity of organic amendments determine the amount of carbon stabilized in particle-size fractions of a semiarid degraded soil
(2017) In Arid Land Research and Management 31(1). p.14-28- Abstract
A 9-month lab experiment was carried out with three different amendments (vine pruning wastes, PW; composted vine pruning wastes, cPW; and sewage sludge, SS) added at three different rates (90, 180, and 240 t ha−1, dry weight) in order to test whether the type or the quantity of the amendments applied to a semiarid, degraded soil determined the Corg accumulation in its particle-size fractions (coarse sand, 200–2,000 µm; fine sand, 63–200 µm; silt, 2–63 µm; and clay, 0.1–2 µm). All amendments, independently of their C/N ratios, resulted in similar Corg content and accumulation in coarse sand and silt-sized fractions after 9 months. In the clay-sized fraction, enrichment in Corg produced the... (More)
A 9-month lab experiment was carried out with three different amendments (vine pruning wastes, PW; composted vine pruning wastes, cPW; and sewage sludge, SS) added at three different rates (90, 180, and 240 t ha−1, dry weight) in order to test whether the type or the quantity of the amendments applied to a semiarid, degraded soil determined the Corg accumulation in its particle-size fractions (coarse sand, 200–2,000 µm; fine sand, 63–200 µm; silt, 2–63 µm; and clay, 0.1–2 µm). All amendments, independently of their C/N ratios, resulted in similar Corg content and accumulation in coarse sand and silt-sized fractions after 9 months. In the clay-sized fraction, enrichment in Corg produced the incorporation of particles from this particle-size fraction into the silt-sized fraction. Likewise, increasing the application rates of the amendments led to larger Corg contents into the particle-size fractions of all amended soils except for the clay-sized fraction. The application of SS resulted in lower basal respiration-to-Corg ratios in the clay-sized fraction than the application of PW and cPW, suggesting a higher protection of the Corg in the SS treatment. These results indicate that organic amendments from woody plants with C/N ratios higher than 30, such as PW, favor Corg accumulation in the fine sand-sized fractions. Furthermore, our findings suggest that the application rate of such amendments, rather than the C/N ratios and amendment origin (from sludge or woody plants), is the key factor for promoting Corg accumulation in the silt-sized fractions of semiarid degraded soils.
(Less)
- author
- Nicolás, César LU ; Hernández, Teresa and García, Carlos
- organization
- publishing date
- 2017-01-02
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Semiarid soil, sewage sludge, soil basal respiration, soil carbon accumulation, soil particle-size fractionation, vine pruning wastes
- in
- Arid Land Research and Management
- volume
- 31
- issue
- 1
- pages
- 15 pages
- publisher
- Taylor & Francis
- external identifiers
-
- wos:000392424500002
- scopus:84978159887
- ISSN
- 1532-4982
- DOI
- 10.1080/15324982.2016.1195458
- language
- English
- LU publication?
- yes
- id
- a3122e83-c506-42ad-a2a4-b03f1a8f71a9
- date added to LUP
- 2017-01-12 13:12:14
- date last changed
- 2024-03-07 20:11:17
@article{a3122e83-c506-42ad-a2a4-b03f1a8f71a9,
abstract = {{<p>A 9-month lab experiment was carried out with three different amendments (vine pruning wastes, PW; composted vine pruning wastes, cPW; and sewage sludge, SS) added at three different rates (90, 180, and 240 t ha<sup>−1</sup>, dry weight) in order to test whether the type or the quantity of the amendments applied to a semiarid, degraded soil determined the C<sub>org</sub> accumulation in its particle-size fractions (coarse sand, 200–2,000 µm; fine sand, 63–200 µm; silt, 2–63 µm; and clay, 0.1–2 µm). All amendments, independently of their C/N ratios, resulted in similar C<sub>org</sub> content and accumulation in coarse sand and silt-sized fractions after 9 months. In the clay-sized fraction, enrichment in C<sub>org</sub> produced the incorporation of particles from this particle-size fraction into the silt-sized fraction. Likewise, increasing the application rates of the amendments led to larger C<sub>org</sub> contents into the particle-size fractions of all amended soils except for the clay-sized fraction. The application of SS resulted in lower basal respiration-to-C<sub>org</sub> ratios in the clay-sized fraction than the application of PW and cPW, suggesting a higher protection of the C<sub>org</sub> in the SS treatment. These results indicate that organic amendments from woody plants with C/N ratios higher than 30, such as PW, favor C<sub>org</sub> accumulation in the fine sand-sized fractions. Furthermore, our findings suggest that the application rate of such amendments, rather than the C/N ratios and amendment origin (from sludge or woody plants), is the key factor for promoting C<sub>org</sub> accumulation in the silt-sized fractions of semiarid degraded soils.</p>}},
author = {{Nicolás, César and Hernández, Teresa and García, Carlos}},
issn = {{1532-4982}},
keywords = {{Semiarid soil; sewage sludge; soil basal respiration; soil carbon accumulation; soil particle-size fractionation; vine pruning wastes}},
language = {{eng}},
month = {{01}},
number = {{1}},
pages = {{14--28}},
publisher = {{Taylor & Francis}},
series = {{Arid Land Research and Management}},
title = {{Type and quantity of organic amendments determine the amount of carbon stabilized in particle-size fractions of a semiarid degraded soil}},
url = {{http://dx.doi.org/10.1080/15324982.2016.1195458}},
doi = {{10.1080/15324982.2016.1195458}},
volume = {{31}},
year = {{2017}},
}