Studies on the properties of organic matter in buried humic horizon derived from volcanic ash

Yoshida, Masao; Kumada, Kyoichi

doi:10.1080/00380768.1979.10433198

Cited by 8 publications

(3 citation statements)

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“…2), and their respective slopes (Δ log K ) calculated from the equation Δ log K = log K 465 − log K 665 (Yoshida et al, 1978) are presented in Table 3 along with the E4 to E6 ratios. Previous studies (Kumada, 1965, 1987; Yoshida et al, 1978; Tan, 1998) indicated that, using the Δ log K , three types of humic substances could be distinguished: (i) humic acids with Δ log K values below 0.6 tended to occur in volcanic ash soils (Type A), (ii) those with Δ log K ranging from 0.6 to 0.8 were likely to form in forest soils and paddy soils (Type B), and (iii) those with Δ log K ranging from 0.8 to 1.1 were typically present in peat, decomposed grass, and animal manures (Type C). Our manure products with their Δ log K ranging from 0.83 to 1.04 (Table 3) belong to Type C (i.e., humic substances present in peat and manure) (Tan, 1998).…”

Section: Resultsmentioning

confidence: 99%

Physicochemical Characteristics of Animal and Municipal Wastes Decomposed in Arid Soils

et al. 2005

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The application of anaerobically processed animal manure to maintain adequate levels of organic matter in arid soils is becoming a common practice. The purpose of this study was to characterize two farm manure products as compared with municipal waste compost (MWC). The anaerobic processing to obtain a biogas manure (BM) product was much faster (25 d) than the aerobic composting of farmyard manure (FYM) (90 d). Drying by three different methods (solar-drying, vacuum-drying at 45 degrees C, and freeze-drying) did not affect the quality of BM. Based on the chemical characteristics, FYM and BM products were comparable, and, containing less ash (30%) and heavy metals (50 mg Pb kg(-1)), seemed superior to MWC that contained 65% ash and 108 mg Pb kg(-1). On the other hand, MWC had higher C content (69.9%), lower acidity (15.04 mol kg(-1)), and higher exothermic peaks (300-460 degrees C) than BM and FYM (50% C, 20 mol kg(-1), and 275-450 degrees C, respectively), thus showing a greater extent of humification. Also, when the organic materials were incubated with arid soils and monitored for mean residence times (MRT), MWC was slightly more resistant to decomposition (MRT 175-180 d) than BM or FYM (MRT 161-166 d). The observed differences, however, were too small to dismiss any of the products as a valuable material for land applications to improve soil quality. In view of the results obtained, MWC may be considered an adequate substitute for BM or FYM, whenever the latter are in short supply.

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Section: Resultsmentioning

confidence: 99%

Physicochemical Characteristics of Animal and Municipal Wastes Decomposed in Arid Soils

et al. 2005

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“…Soil samples collected from one Yubunebara (Gotenba, Shizuoka, Japan) and two Ashitaka‐Onoue (Numazu, Shizuoka, Japan) soil profiles were used. Detailed descriptions of the soil profiles were presented in the reports of Yoshida et al . (1978) and Tsutsuki and Kuwatsuka (1989), respectively.…”

Section: Methodsmentioning

confidence: 99%

Structural stability and natural¹³C abundance of humic acids in buried volcanic ash soils

Watanabe

Takada

2006

Soil Science and Plant Nutrition

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To examine the relationships between soil age and the structural stability and natural 13 C abundance (δ 13 C) of humic acids, buried humic layers in volcanic ash soil profiles near Mt Fuji, Japan, namely Yubunebara (present to 10,000 years before present (ybp); n = 5) and Ashitaka-Onoue (<1,000-30,000 ybp; n = 6), were analyzed. The contents and δ 13 C values of the fulvic acids (humic substances) and non-humic substances in the fulvic acid fractions were also determined. The degree of humification of the humic acids differed remarkably between the surface and buried layers, and the A 600 /C value (absorbance at 600 nm mg −1 C mL −1 of humic acids in 0.1 mol L −1 NaOH) increased toward the older buried layers. The proportion of aromatic C in total C of the humic acids, estimated using cross polarization/magic angle spinning 13 C nuclear magnetic resonance spectroscopy, also increased, whereas the proportions of alkyl and O-alkyl C decreased from the surface toward the older layers. These observations suggested higher stability in the aromatic than aliphatic components and the contribution of aromatic C to the increase in the A 600 /C value. The composition of the C functional groups did not vary appreciably among layers older than 10,000 ybp. The δ 13 C value of bulk soil organic matter (SOM) fluctuated in both profiles, suggesting that the proportions of C 3 and C 4 plants grown when each layer was the surface layer differed among the layers. Although, in general, variation in the δ 13 C value of each humus fraction corresponded to that of bulk SOM, there were significant differences in the δ 13 C value between the humus fractions and bulk SOM, and the differences were more conspicuous in the younger layers and less conspicuous in the older layers. A negative correlation (with an exception) was also observed between the difference in the δ 13 C values of humic acids from that of bulk SOM and the relative content of aromatic C in the humic acids. Possible causes of the differences and changes in the δ 13 C values are discussed. Kew words:13 C NMR, degree of humification, fulvic acids, humic acids, stable carbon isotopic ratio.

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“…Black humic soils derived from volcanic ash known as Andi sols are characteristic of the stabilized humus combined with aluminous clays, which is pro tected against microbiological decomposition. The relationship between humus characteris tics and the age of the present A and buried humic horizons of such black soils were studied by YOSHIDA et al (1978) and others. These stud ies show us that the degree of humification tends to increase during the Post-glacial Age, then decreases toward the Wisconsin Ice Age and remains nearly constant till 28,000y.…”

Section: Introductionmentioning

confidence: 99%

Altitudinal Distribution of Humus Properties of Andisols in Japan

Watanabe

Sakagami

Aoki

et al. 1994

Geogr. Rev. Jpn, Ser B

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Humic properties imparted to Andisols during pedogenesis are resistant to diagenetic alter ation and are preserved in stable enough form to reconstruct the paleoenvironment of the Holocene. Success in the reconstruction of paleoenvironment from soil evidence depends on the fi eld area chosen. By investigating four volcanic areas in Japan, we examined the altitudinal distribution of two soil attributes, humus accumulation and Pg absorption of humic acid, and their regularity to clarify the 'promising area' for paleoenvironment study by pedological approach. Phytolith composition was also examined to discuss the pedogenetic biological influence on humus properties of Andisols.

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Studies on the properties of organic matter in buried humic horizon derived from volcanic ash

Cited by 8 publications

References 8 publications

Physicochemical Characteristics of Animal and Municipal Wastes Decomposed in Arid Soils

Physicochemical Characteristics of Animal and Municipal Wastes Decomposed in Arid Soils

Structural stability and natural¹³C abundance of humic acids in buried volcanic ash soils

Altitudinal Distribution of Humus Properties of Andisols in Japan

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Studies on the properties of organic matter in buried humic horizon derived from volcanic ash

Cited by 8 publications

References 8 publications

Physicochemical Characteristics of Animal and Municipal Wastes Decomposed in Arid Soils

Physicochemical Characteristics of Animal and Municipal Wastes Decomposed in Arid Soils

Structural stability and natural13C abundance of humic acids in buried volcanic ash soils

Altitudinal Distribution of Humus Properties of Andisols in Japan

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Structural stability and natural¹³C abundance of humic acids in buried volcanic ash soils