Simplified Colorimetric Determination of Soil Organic Matter

Sims, J.R.; Haby, V. A.

doi:10.1097/00010694-197108000-00007

Cited by 490 publications

(211 citation statements)

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“…Ash content was determined by combustion at 550°C for 8 h. Organic matter was determined by subtraction of ash content, and total organic carbon was calculated as 58% of the organic matter (Zmora-Nahum et al, 2005). Total extractable carbon (TEC) content was obtained by extraction from the sample with 0.1 mol·L −1 of Na 4 P 2 O 7 (pH 9.7) using a sample: extraction ratio of 1:10 and subsequent colorimetric determination (Sims and Haby, 1971). An aliquot of the extract was acidified with HCl to pH 1.0, left to stand for 24 h in a refrigerator for the complete precipitation of HA, and then centrifuged.…”

Section: Methodsmentioning

confidence: 99%

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Liu

2016

Science of The Total Environment

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Section: Methodsmentioning

confidence: 99%

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Liu

2016

Science of The Total Environment

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“…Total organic carbon was determined according to Sims & Haby (1971), using 1.0 g, dried soil sample. The soil pH was determined in 0.01 mol L -1 CaCl 2 solution (1:2.5).…”

Section: Methodsmentioning

confidence: 99%

“…The chemical elements present in the litter are mobilized and reabsorbed by plant roots, restarting a new plant nutrient cycling and guaranteeing perennial conditions to the system (Guo & Sims, 1999b), even in cases of low fertile soils. The main factors that control the organic matter transformation process are: the quantity and quality of litter material components, the physical and chemical environment, and the decomposition organisms (Swift et al, 1979). Laboratory experiments have evidenced that some environment factors, like soil water content and air temperature, affect the organic matter decomposition rate, which is usually higher in tropical than in temperate regions (Taylor & Parkinson, 1988).…”

Section: Introductionmentioning

confidence: 99%

Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus

Rigobelo

Nahas

2004

Sci. agric. (Piracicaba, Braz.)

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The accumulation and decomposition of litter in soils under forests depend on climatic and biotic conditions. This work evaluated the effect of monthly rainfall and temperature on total bacteria, and on the dehydrogenase and respiration microbial activities. The effects of organic matter, total organic C and soil moisture were also evaluated. Performed from April, 1999 to March, 2000 in an Eucalyptus-cultivated and Pinus-cultivated Oxisol (Typic Haplustox), the study showed that climate and the soil variables affect the total number of bacteria and the microbial activities. The highest air temperatures and rainfall intensities were found during the Summer and, consequently, all the studied variables were maximal during this period. Minimal values varied from Autumn to Winter or, for some parameters, up to Spring. A positive correlation proved the influence of the organic matter, organic C and soil moisture on the total bacteria and on the respiratory and dehydrogenase activities. Litter content was also higher in the Summer as compared to the Winter, but it correlated only with the total bacteria (r = 0.52 *** ). However, the correlation between the litter content and organic matter (r = 0.64 *** ) and soil moisture (r = 0.49 ** ) suggest that the soil organic matter may have influenced microbial activity. All variables found in the Eucalyptus soil were higher than that of Pinus soil, probably favored by the best soil fertility and higher pH value. Key words: MPN, dehydrogenase, microbial respiration, litter, temperature FLUTUAÇÃO SAZONAL DA COMUNIDADE BACTERIANA E DA ATIVIDADE MICROBIANA EM SOLOS SOB EUCALIPTO E PINUS RESUMO: O acúmulo e decomposição da serapilheira em solos de florestas dependem das condições climáticas e bióticas. Este trabalho avaliou as variações mensais no número de bactérias totais e nas atividades da desidrogenase e da respiração microbiana, relacionando-as à quantidade de serapilheira depositada e aos teores de matéria orgânica e de água do solo. O estudo foi realizado de abril de 1999 a março de 2000 em um Latossolo Vermelho-Escuro plantado com eucalipto e com Pinus. Houve influência do clima e das variáveis do solo nas bactérias totais e a atividade microbiana. Todas as variáveis ajustaram-se a equações de 3 o grau. Durante o verão, foram obtidos os maiores valores de temperatura e de chuvas e, consequentemente, todas as variáveis estudadas apresentaram seus valores máximos neste período, e os valores mínimos no outonoinverno ou, para alguns parâmetros, até mesmo na primavera. A correlação positiva comprovou a influência da matéria orgânica e da água do solo no número de bactérias e nas atividades respiratórias e da desidrogenase. O teor de serapilheira sobre o solo também foi maior no verão do que no inverno, mas só apresentou correlação com as contagens de bactérias (r = 0,52 *** ). Contudo, a correlação entre os teores de serapilheira e os de matéria orgânica (r = 0,64 *** ) e de água do solo (r = 0,49 ** ) demonstra que a matéria orgânica pode ter influenciado a atividad...

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“…Mineralization activity was also studied using a respirometric test (Novák, Apfeltaler 1964) in four variants: -basal respiration, -potential respiration with amendment NH 4 + , glucose, NH 4 + + glucose. In addition, these characteristics were also determined: -C ox (Sims, Haby 1971), -total N, -granularity, -soil reaction (pH H 2 O ).…”

Section: Research Localitiesmentioning

confidence: 99%

Biological activity of anthropogenic soils after spoil-bank forest reclamation

Remeš¹,

Šíša²

2007

J. For. Sci.

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ABSTRACT:The paper presents the results of relatively long-term research focused on spoil bank revitalization processes in the North Bohemian Brown Coal Basin after the first three years of observations. The biological activity of soil (namely catalase and phosphatase activity), indicators of basal and potential soil respiration, ammonification and growth, development and nutrition status of forest plantations were selected as indicators of this revitalization process. These parameters were determined in five localities of different age of reclamation where different technological approaches and tree species compositions were used. The results confirm the distinct time dependence of revitalization processes. From the aspect of biological activity older reclamations are close to natural forest soil. The enrichment of top soil layer with organic matter before the plantation (by ploughing in cellulose fibres and peat addition) increased some parameters of soil biological activity. The positive amelioration effect of black alder (Alnus glutinosa) was also confirmed.

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Simplified Colorimetric Determination of Soil Organic Matter

Cited by 490 publications

References 0 publications

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus

Biological activity of anthropogenic soils after spoil-bank forest reclamation

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