EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The use of carbon isotope ratios to evaluate legume contribution to soil enhancement in tropical pastures


Plant & Soil 162(2): 177-182
The use of carbon isotope ratios to evaluate legume contribution to soil enhancement in tropical pastures
Soil carbon distribution with depth, stable carbon isotope ratios in soil organic matter and their changes as a consequence of the presence of legume were studied in three 12-year-old tropical pastures (grass alone - Brachiaria decumbens (C-4), legume alone - Pueraria phaseoloides (C-3) and grass + legume) on an Oxisol in Colombia. The objective of this study was to determine the changes that occurred in the 13C isotope composition of soil from a grass + legume pasture that was established by cultivation of a native savanna dominated by C-4 vegetation. The 13C natural abundance technique was used to estimate the amount of soil organic carbon originating from the legume. Up to 29% of the organic carbon in soil of the grass + legume pasture was estimated to be derived from legume residues in the top 0-2-cm soil depth, which decreased to 7% at 8-10 cm depth. Improvements in soil fertility resulting from the soil organic carbon originated from legume residues were measured as increased potential rates of nitrogen mineralization and increased yields of rice in a subsequent crop after the grass + legume pasture compared with the grass-only pasture. We conclude that the 13C natural abundance technique may help to predict the improvements in soil quality in terms of fertility resulting from the presence of a forage legume (C-3) in a predominantly C-4 grass pasture.

Accession: 002530207

DOI: 10.1007/bf01347704

Download PDF Full Text: The use of carbon isotope ratios to evaluate legume contribution to soil enhancement in tropical pastures



Related references

Changes in carbon isotope ratios of soil organic matter following conversion of tropical deciduous forest to pasture. Bulletin of the Ecological Society of America 74(2 SUPPL ): 244, 1993

The contribution of the seed of the legume Stylosanthes humilis to the nutrition of cattle grazing mature tropical pastures. Proceedings of the 12th International Grassland Congress Grassland Utilization 2: 560-564, 1974

Leaf carbon isotope ratios from a tropical dry forest in Venezuela. Flora (Jena) 192(2): 121-124, 1997

Carbon isotope ratios of plants of a tropical dry forest in mexico. Functional Ecology 3(2): 137-142, 1989

Stable carbon and nitrogen isotope ratios as tools to evaluate the nature of particulate organic matter in the venice lagoon. Estuarine, Coastal and Shelf Science, 2013

Control of the weevil (Amnemus quadrituberculatus) in tropical legume pastures with dieldrin and heptachlor pre-sowing soil treatments. Australian Journal of Experimental Agriculture and Animal Husbandry 15(75): 545-549, 1975

Soil organic carbon content and equestration potential in legume-based pastures. 2005

Influence of stocking rate on the recovery of legume in tropical grass legume pastures. Tropical Grasslands 19(1): 4-10, 1985

Use of stable isotope ratios for profiling of industrial ephedrine samples: application of hydrogen isotope ratios in combination with carbon and nitrogen. Forensic Science International 189(1-3): 14-18, 2009

Introduction of using stable isotope ratios, with reference to carbon and nitrogen isotope ratios of benthic animals in brackish tidal flats. Japanese Journal of Limnology e; 63(2): 155-156, 2002