EurekaMag.com logo
+ Site Statistics
References:
47,893,527
Abstracts:
28,296,643
+ 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

Spectroscopic and chemical differences in organic matter of two vertisols subjected to long periods of cultivation


, : Spectroscopic and chemical differences in organic matter of two vertisols subjected to long periods of cultivation. Australian Journal of Soil Research 25(3): 323-335

The nature of a number of humic fractions extracted from the 0-0.1 m layers of two cracking clay soils was studied using 13C nuclear magnetic resonance and infrared spectroscopy. By comparing samples from sites under native vegetation and nearby sites which had been under continuous cultivation for cereal cropping for 35 years, two different mechanisms which act to protect organic matter against decline are evident. In both grey clays (Langlands-Logie clay) and black earths (Waco clay), a large proportion of the organic matter receives some degree of protection through association with clay. In grey clays, this is the only significant form of protection. The humic materials display little molecular recalcitrance and contain significant amounts of long alkyl chains and proteinaceous groups. In black earths, association of organic matter with clay is also the most significant factor but, in addition, the remaining humic materials are more stable to microbial attack. This results from higher aromaticity as well as shorter, more highly branched alkyl chains. Some implications of these findings are also discussed.


Accession: 006460853

DOI: 10.1071/SR9870323

Submit PDF Full Text: Here


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Related references

Skjemstad J.O.; Dalal R.C.; Barron P.F., 1986: Spectroscopic investigations of cultivation effects on organic matter of vertisols. Solid state carbon-13 nuclear magnetic resonance (13C NMR) spectroscopy with cross polarization and magic angle spinning (CP/MAS) was used to study the effect of cultivation on the nature of organic matter in a Vertisol (mesic, mixed, clayey, Typi...

Sun, R.; Dsouza, M.; Gilbert, J.A.; Guo, X.; Wang, D.; Guo, Z.; Ni, Y.; Chu, H., 2016: Fungal community composition in soils subjected to long-term chemical fertilization is most influenced by the type of organic matter. NlmCategory="UNASSIGNED">Organic matter application is a widely used practice to increase soil carbon content and maintain soil fertility. However, little is known about the effect of different types of organic matter, or the input of...

Schulten, H.R.; Monreal, C.M.; Schnitzer, M., 1995: Effect of long-term cultivation on the chemical structure of soil organic matter. Naturwissenschaften 82(1): 42-44

Ravankar, H.N.; Sujata Pothare; Sarap, P.A.; Hadole, S.S., 2001: Distribution of organic matter in vertisols under long term fertilization to sorghum-wheat cropping sequence. An investigation (2000-2001) was conducted at Dr. PDKV, Akola, Maharashtra, India to study the effect of long term manure and fertilizer application, which was started since 1988, on organic matter and its fractions in Vertisols after 12 years of...

He, W.; Jung, H.; Lee, J-Hyun.; Hur, J., 2016: Differences in spectroscopic characteristics between dissolved and particulate organic matters in sediments: Insight into distribution behavior of sediment organic matter. In this study, we examined the distribution behavior of sediment organic matter (SOM) between dissolved and particulate phases and the potential influencing factors by comparing the spectroscopic features of pore water organic matter (PWOM) and al...

Hsu JennHung; L.S.angLien, 1999: Chemical and spectroscopic analysis of organic matter transformations during composting of pig manure. Composting of separated pig manure (SPM) was studied in an attempt to elaborate upon organic matter (OM) transformation during the process, and define parameters for product maturity using both chemical and spectroscopical methods. Composting was...

Howson, G., 1988: Use of the cotton strip assay to detect potential differences in soil organic matter decomposition in forests subjected to thinning. ITE symposium: 4) 94-98

Kogel Knabner, I., 1988: Aliphatic components of the organic matter in forest soils. I. 13C-NMR spectroscopic and wet chemical investigations. Leaf litter (beech, ash) and needle litter from mull, moder and mor profiles were analysed for the fatty acid content of the cutin. During decomposition of needle litter in the mor profile, there was a decrease in polysaccharides and an increase i...

Batista, A.Paula.S.; Teixeira, A.Carlos.S.C.; Cooper, W.J.; Cottrell, B.A., 2016: Correlating the chemical and spectroscopic characteristics of natural organic matter with the photodegradation of sulfamerazine. The role of aquatic natural organic matter (NOM) in the removal of contaminants of emerging concern has been widely studied. Sulfamerazine (SMR), a sulfonamide antibiotic detected in aquatic environments, is implicated in environmental toxicity an...

Matsui, T.; Sugita, S.; Imanaka, H.; Fuyuki, M.; Kobayashi, K., 2001: In-situ spectroscopic observation of abiotic chemical reactions producing organic matter. Astrobiology 1(3): 306, Fall