Next Article in Journal
Nitrogen Sources and Rates Affect Soybean Seed Composition in Mississippi
Previous Article in Journal
Trade-Offs in Arbuscular Mycorrhizal Symbiosis: Disease Resistance, Growth Responses and Perspectives for Crop Breeding
Article Menu
Issue 4 (December) cover image

Export Article

Open AccessArticle
Agronomy 2017, 7(4), 76; doi:10.3390/agronomy7040076

Assessment of Soil Aggradation through Soil Aggregation and Particulate Organic Matter by Riparian Switchgrass Buffers

1
Facultad de Ingeniería, Universidad Nacional de Chimborazo, Riobamba, Provincia de Chimborazo 060150, Ecuador
2
Facultad de Ciencias Forestales y Ambientales, Universidad de Los Andes, Mérida, Estado Mérida 5101, Venezuela
3
Facultad de Ciencias, Universidad de Los Andes, Mérida, Estado Mérida 5101, Venezuela
4
Department of Natural Resource Ecology and Management, 253 Bessey, Iowa State University, Ames, IA 50011, USA
*
Author to whom correspondence should be addressed.
Received: 6 October 2017 / Revised: 1 November 2017 / Accepted: 13 November 2017 / Published: 17 November 2017
View Full-Text   |   Download PDF [239 KB, uploaded 17 November 2017]

Abstract

The restoration of riparian zones has been an important issue in many regions for the recovery of ecosystem functions. The objective of this study was to assess soil aggradation in a 7-year established riparian switchgrass buffer (SGB) and in a non-buffered riparian zone with an annual row crop (ARC). We measured the aggregate size distribution and stability of macroaggregates, aggregate-associated soil organic carbon, soil organic matter fractions and the chemical composition of light particulate organic matter to monitor soil aggregation in a riparian soil following the conversion of agricultural row crops to switchgrass filters. Aggregate size fractions were separated by wet sieving using the aggregate size-stability protocol. The proportion of soil and total organic C was quantified for each aggregate size class. Soil organic matter fractions were isolated by size and density into light particulate organic matter and heavy particulate organic matter and mineral fraction organic matter. The categorization of aggregates by size and water stability (slaking resistance) showed a significantly larger (p < 0.001) proportion of water-unstable large macroaggregates (>2000 µm) under SGB (34%) compared to that under ARC (29%), while the proportion of water-unstable small macroaggregates (250–2000 µm) was significantly higher under ARC (14%) than under SGB (10%). Our results showed that the amounts of light and heavy particulate organic matter did not change in the short-term (7 years) after SGB establishment. It appears that the lower soil stabilization and soil organic C storage under SGB is related to (i) the large number of coarse roots; (ii) lower inputs of light and heavy particulate organic matter; (iii) no changes in the alkyl-C/O-alkyl-C ratio over time; and (iv) light particulate organic matter with a high C/N ratio. View Full-Text
Keywords: riparian zone; switchgrass buffer; soil aggregation; organic matter fractions riparian zone; switchgrass buffer; soil aggregation; organic matter fractions
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Márquez, C.O.; García, V.J.; Schultz, R.C.; Isenhart, T.M. Assessment of Soil Aggradation through Soil Aggregation and Particulate Organic Matter by Riparian Switchgrass Buffers. Agronomy 2017, 7, 76.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Agronomy EISSN 2073-4395 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top