Characteristics of humic substances in cultivated and natural forest soils of Sikkim

Martin, D.; Srivastava, Prashant; Ghosh, D. C.; Zech, Wolfgang

doi:10.1016/s0016-7061(98)00010-x

Cited by 54 publications

(32 citation statements)

References 14 publications

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“…The amount of extractable HAs concentration depends on origin and type of the SOWs. Similar results have been reported by Martin et al (1998) and Goenadi et al (2000). The HAs concentration of EFBOP and TCR composts were higher than that of CPH.…”

Section: Extraction and Purification Of Humic Acid From Plantation's supporting

confidence: 92%

“…The purifcation on this experiment indicated that EFBOP, CPH, and TCR had a low molecular weight with E 4 : E 6 ratio 5.0 (EFBOP), 7.4 (CPH), and 7.3 (TCR) respectively (Figure 1 and 2). These results are in agree with those of Martin et al (1998) on purification of HAs from natural forest soils of Sikkim (E 4 :E 6 = 4.12 -7.05), but was different with the values reported by Zhang et al (1988) who found the ratio to be always less than 5.0. The differences could be attributed to differences in type of HAs.…”

Section: Extraction and Purification Of Humic Acid From Plantation's supporting

confidence: 75%

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Extraction and characterization of humic acid from plantation’s solid organic waste composts Ekstraksi dan karakterisasi asam humat dari kompos limbah padat organik perkebunan

SANTI¹,

GOENADI²,

WIDIASTUTI³

et al. 2016

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Section: Extraction and Purification Of Humic Acid From Plantation's supporting

confidence: 92%

Section: Extraction and Purification Of Humic Acid From Plantation's supporting

confidence: 75%

Extraction and characterization of humic acid from plantation’s solid organic waste composts Ekstraksi dan karakterisasi asam humat dari kompos limbah padat organik perkebunan

SANTI¹,

GOENADI²,

WIDIASTUTI³

et al. 2016

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“…The most stabile humus substances, as well as humic acids, were also in 2007, when the highest average temperature per year and during the vegetation was recorded. The results of Martin et al (1998) also show on higher degree of humification of humic acids of warmer areas.…”

Section: Resultsmentioning

confidence: 65%

Quantity and Quality of Soil Organic Matter in Ecological and Integrated Farming System

Tobiašová

2012

JCEA

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Impact of farming system on the quantity and quality of soil organic matter was studied. The experiment was situated on Haplic Luvisol of Research -experimental base of Slovak University of Agriculture Dolná Malanta, where over a period of 5 years soil samples from ecological (ES) and integrated (IS) farming system were collected. In period of 5 years, on average higher contents of total organic carbon (TOC) and total nitrogen (NT) were in ES (1.219%; 1382 mg.kg ). TOC content in the ES was on the level of variants with application of farmyard manure, while in the IS it was on the level of non-fertilized variants. The highest contents of TOC and non-labile carbon (CNL) were recorded in 2010 when the previous crops were alfalfa (Medicago sativa) and pea (Pisum sativum). Higher content of CNL was in the ES than in the IS. A positive linear relationship between the amounts of precipitation per year and during the vegetation was observed not only between TOC contents (r = 0.914, P < 0.05 and r = 0.971, P < 0.01), but also CNL contents (r = 0.880, P < 0.05 and r = 0.952, P < 0.05). The most stabilized humus substances were in 2007, when the highest average temperature per year and during the vegetation was recorded. In 2010, the lowest amounts of extracted humus substances were recorded, with domination of humic acids. Their stability, however, on the base of colour coefficients of humus substances and humic acids were the lowest from all years. The humus substances were more stabilized in the IS than in the ES. ). Obsah TOC sa v ES pohyboval na úrovni variantov hnojených maštaľným hnojom, kým v IS to bolo približne na úrovni nehnojeného variantu. Najvyššie obsahy TOC a nelabilného uhlíka (CNL) boli zaznamenané v roku 2010, kedy boli predplodinami lucerna siata (Medicago sativa) a hrach siaty (Pisum sativum). Vyšší obsah frakcie CNL bol v ES ako v IS. Pozitívna lineárna závislosť medzi množstvom zrážok za rok ako aj počas vegetácie bola zaznamenaná nielen medzi obsahom TOC (r=0,914; P<0,05 a r=0,971 P<0,01), ale aj CNL (r=0,880; P<0,05 a r=0,952; P<0,05). Najstabilnejšie humusové látky boli v roku 2007, kedy bola zaznamenaná najvyššia priemerná teplota za rok aj za vegetáciu. V roku 2010 boli zaznamenané najnižšie množstvá vyextrahovaných humusových látok, pričom dominovali humínové kyseliny. Ich stabilita však na základe farebných kvocientov humusových látok a humínových kyselín bola najnižšia zo všetkých rokov. V ES boli humusové látky menej stabilizované ako v IS.

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“…Nesses locais, a MOS tende a ser mais preservada, visto que o aporte de resíduos é elevado, as taxas de decomposição da MOS tendem a diminuir, o controle da erosão é naturalmente eficaz e a lixiviação de C tende a ser reduzida, por ser eficiente a ciclagem de C e de outros nutrientes (Lal, 2004;Bronick & Lal, 2005). Além disso, em áreas de matas, há tempo maior para humificação da MOS, sendo bastante provável a prevalência de moléculas orgânicas mais condensadas em relação àquelas de menor massa molar (Martin et al, 1998). Os solos dos HFs apresentavam horizonte A enterrado, situado logo abaixo de um horizonte com características intermediárias; acima deles, foi identificada, no campo, a formação de um novo horizonte A.…”

Section: Methodsunclassified

Frações de carbono em topossequências de solos sob eucalipto com diferentes históricos de uso

Silva

Silva³

et al. 2012

Rev. Bras. Ciênc. Solo

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RESUMONo Brasil, boa parte dos plantios florestais tem sido realizada em solos que apresentam algum grau de degradação física, química ou biológica. A proteção ao solo fornecida pelas árvores, em função da deposição de serapilheira, constitui um dos processos de recuperação de áreas degradadas, e, como a matéria orgânica está relacionada com muitos dos atributos físicos, químicos e biológicos do solo, ela se caracteriza como um fator-chave na manutenção da qualidade ambiental de sistemas florestais. Assim, objetivouse neste trabalho caracterizar frações da matéria orgânica em solos sob cultivo mínimo de eucalipto com diferentes históricos de uso e posições na paisagem. O estudo foi realizado em três hortos florestais (HFs): Terra Dura, Canafístula e Sanga das Pedras, cultivados com eucalipto no Estado do Rio Grande do Sul. Os solos foram amostrados nas profundidades de 0-5, 5-20 e 20-40 cm. Na profundidade de 0-5 cm, a maioria dos Argissolos dos HFs estudados apresentou teores de carbono orgânico (CO) superiores aos de matas nativas adjacentes. Nas áreas cultivadas, há maior armazenamento de CO no HF Canafístula, sendo notados, em geral, menores teores de CO no terço inferior da encosta em relação às outras posições das topossequências avaliadas. O índice de humificação, em geral, é maior nas áreas de mata em comparação às áreas cultivadas; contudo, ele varia em função da profundidade do solo, da posição amostrada na topossequência e do HF avaliado. Nas profundidades (1) Extraído da dissertação de Mestrado da primeira autora, financiado pela FAPEMIG e CMPC Celulose Riogendense Ltda.Recebido para publicação em 15 de agosto de 2011 e aprovado em 18 de junho de 2012.

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Characteristics of humic substances in cultivated and natural forest soils of Sikkim

Cited by 54 publications

References 14 publications

Extraction and characterization of humic acid from plantation’s solid organic waste composts Ekstraksi dan karakterisasi asam humat dari kompos limbah padat organik perkebunan

Extraction and characterization of humic acid from plantation’s solid organic waste composts Ekstraksi dan karakterisasi asam humat dari kompos limbah padat organik perkebunan

Quantity and Quality of Soil Organic Matter in Ecological and Integrated Farming System

Frações de carbono em topossequências de solos sob eucalipto com diferentes históricos de uso

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