Organic matter quality in a soil cultivated with perennial herbaceous legumes

Canellas, Luciano Pasqualoto; Espíndola, José Antônio Azevedo; Rezende, Carlos Eduardo de; Camargo, Plínio Barbosa de; Zandonadi, Daniel Basílio; Rumjanek, Víctor Marcos; Guerra, José Guilherme Marinho; Teixeira, Marcelo Grandi; Braz-Filho, Raimundo

doi:10.1590/s0103-90162004000100010

Cited by 24 publications

(17 citation statements)

References 19 publications

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“…This corroborates the report of Canellas et al (2004), who concluded that humic acids, as a fraction of humic substances, changes most with structural changes under cultivation.…”

Section: Chemical Fractionation Of Organic Mattersupporting

confidence: 92%

Humic Haplustox under different land uses in a high altitude environment in the Agreste region of Pernambuco, Brazil

Araújo

Ribeiro

Corrêa

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYThe Garanhuns Plateau in the Agreste region of the State of Pernambuco, Brazil is characterized by humid climatic conditions due to orographic rains, unlike the surrounding semiarid region. These soils are subjected to intense agricultural use and are extremely important for the regional economy. This study was carried out in the municipality of Brejão in the Agreste region with the aim of assessing changes in humic Haplustox soils subjected to different land uses. Four plots with different vegetation covers (native forest, secondary shrubby vegetation (capoeira), traditional cropping system, and planted pasture) were selected, and samples were taken from a soil profile and four small pits surrounding it at each site. Physical and chemical properties were assessed, including aggregate stability, humic organic fractions, and a microbiological evaluation through determination of basal respiration, microbial biomass carbon, and metabolic quotient. The soils under study showed physical and chemical properties typical of a Haplustox, such as low nutrient content, low cation exchange capacity, and high levels of acidity and Al saturation. The total organic carbon (TOC) contents were high regardless of the type of land use. Aggregates < 2 mm were dominant in all the conditions under study. The TOC content was higher in the soil under capoeira, 43.91 g kg -1 on the surface, while 34.36 and 33.43 g kg -1 of TOC were observed in the first layer of forest and pasture soils, respectively. While the microbial biomass C (MBC) was greater than 700 mg kg -1 in the forest and pasture areas (in the 0-5 cm layer), and 588 mg kg -1 in the soil under capoeira, these numbers were not statistically different. In the cultivated soil area, there was a reduction of around 28 % in TOC and MBC contents. Agricultural activity contributed to degradation of the humic 1338 horizon, as can be seen from a significant decrease in the TOC and changes in the relative distribution of the humic fractions. In contrast, aggregate stability was not altered as a function of the different land uses; the soil under planted pasture and capoeira were similar to the soil under native forest. Humin was the most important humified fraction for C reserves, contributing over 40 % of the TOC in these soils.Index terms: land use, highland soils, humic substances, aggregate stability, microbial biomass C. RESUMO: LATOSSOLOS AMARELOS HÚMICOS SOB DIFERENTES TIPOS DE UTILIZAÇÃO EM UM AMBIENTE ALTIMONTANO NO AGRESTE DE PERNAMBUCOO Planalto de Garanhuns, no Agreste de Pernambuco, destaca-se por apresentar características climáticas privilegiadas, favorecidas pelas chuvas orográficas, distinguindose da região semiárida circundante. Essas áreas mais úmidas são conhecidas como "brejos de altitude" e intensamente utilizadas e importantes para a economia regional. Este trabalho foi desenvolvido no município de Brejão, Agreste de Pernambuco, com o objetivo de identificar alterações nos atributos de Latossolos Amarelos Húmicos, submetidos às diferentes formas de uso do s...

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“…This corroborates the report of Canellas et al (2004), who concluded that humic acids, as a fraction of humic substances, changes most with structural changes under cultivation.…”

Section: Chemical Fractionation Of Organic Mattersupporting

confidence: 92%

Humic Haplustox under different land uses in a high altitude environment in the Agreste region of Pernambuco, Brazil

Araújo

Ribeiro

Corrêa

et al. 2014

Rev. Bras. Ciênc. Solo

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“…20 As relações entre os teores de C nessas frações podem ser utilizadas como indicadores químicos da qualidade da matéria orgânica, onde os AH se destacam por serem aquela que mais sofre alterações estruturais. 21 Isso se deve ao fato de os AH representarem a fração intermediária entre estabilização dos compostos pela interação com a matéria mineral (huminas) e a ocorrência de ácidos orgânicos oxidados livres na solução do solo (ácidos fúlvicos livres ou associados). 7 Nesse sentido, a manutenção de maiores teores de C na forma de ácidos húmicos (C-AH), em relação aos teores de C na fração ácido fúlvico (C-AF), indica solos mais preservados, de manejo mais conservacionista.…”

Section: Introductionunclassified

Indicadores químicos de qualidade da matéria orgânica de solo da sub-bacia do Rio das Mortes sob manejos diferenciais de cafeeiro

Júnior¹,

Silva²,

Curi³

et al. 2008

Quím. Nova

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IndIcadores químIcos de qualIdade da matérIa orgânIca de solo da sub-bacIa do rIo das mortes sob manejos dIferencIaIs de cafeeIro antônio claret oliveira júnior* Instituto Nacional de Colonização e Reforma Agrária, Av. Afonso Pena, 2403, 79002-073 Campo Grande -MS, Brasil carlos alberto silva, nilton curi e luiz roberto guimarães guilherme Departamento de Ciência do Solo, Universidade Federal de Lavras, CP 3037, 37200-000 Lavras -MG, Brasil otacílio josé Passos rangel Escola Agrotécnica Federal de Alegre, CP 47, 29500-000 Alegre-ES, BrasilRecebido em 3/1/08; aceito em 14/5/08; publicado na web em 22/9/08 CHEMICAL INDICATORS OF THE QUALITY OF ORGANIC MATTER OF SOIL FROM THE RIO DAS MORTES WATERSHED UNDER DIFFERENT COFFEE PLANT MANAGEMENTS. This work evaluated the chemical quality of organic matter (OM) of a Brazilian Oxisol cultivated with coffee plants, under organic and conventional managements. Total organic C (TOC), light fraction C (LF-C) and C in humic (HA-C) and fulvic (FA-C) acids fractions was measured. Amongst the evaluated indexes, TOC and LF-C discriminated better OM attributes as a function of management. The stratification ratio (TOC 5-10cm /TOC 10-20cm ) did not show differences between the systems studied. The organic system can contribute to the sustainability of coffee plantations in Brazil, because it maintains the chemical attributes of OM closer to the indexes verified under forest conditions.

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“…The E 4 /E 6 ratio of the HA isolated from filter cake is low (3.47), see Table 1, when compared to HA from soils. For example, Canellas et al (2004) studied an Ultisol covered with different plants and the values found for E 4 /E 6 were among 6.2 and 8.3. The value found for the HA from filter cake suggest a relatively high degree of aromaticity and/or high molecular weight/size.…”

Section: Resultsmentioning

confidence: 99%

Humic substances isolated from residues of sugar cane industry as root growth promoter

Busato¹,

Zandonadi²,

Dobbss³

et al. 2010

Sci. agric. (Piracicaba, Braz.)

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Plant growth promoting substances are widely used in modern agriculture. Several products in the market are humic substances isolated from different sources. The filter cake, a residue of sugar production, is a rich and renewable source of organic matter and these characteristics place the filter cake as a possible source of plant growth promoting substances. Humic acids (HA) from filter cake were characterized, and their effects as root growth promoters were evaluated. Chemical features of the HA were evaluated through elemental composition, acidic functional groups, E 4 /E 6 ratio and infrared spectroscopy analyzes. The biological activity of the HA was assessed using root architecture parameters and the P-type H + -ATPase activity. The lateral root development was directly related to the stimulation of plasma membrane ATPase activity. The ability of HA to promote root development indicate that HA from filter cake can be used as environmental plant growth stimulators. Key words: H + -ATPase, Brazil, industrial residues, physiological effects, bioactivity Substâncias húmicas isoladas de resíduos da indústria da cana-de-açúcar como promotoras de crescimento radicularRESUMO: Substâncias promotoras do crescimento vegetal são amplamente utilizadas na agricultura moderna. Existem vários produtos no mercado, muitos dos quais são substâncias húmicas isoladas de diferentes fontes. A torta de filtro, um resíduo da produção do açúcar, é uma fonte rica e renovável de matéria orgânica e essas características a tornam uma possível fonte de substâncias promotoras do crescimento vegetal. Ácidos húmicos (AH) da torta de filtro foram caracterizados, e foi avaliado seu efeito como promotor de crescimento radicular. As características químicas dos AH foram avaliadas por meio da composição elementar, grupos funcionais ácidos, relação E 4 /E 6 e espectroscopia de infravermelho. A atividade biológica dos AH foi acessada avaliando-se a arquitetura radicular e a atividade da H + -ATPase de membrana plasmática. O desenvolvimento de raízes laterais foi diretamente relacionado ao estímulo da atividade da H + -ATPase. A habilidade dos AH em promover o desenvolvimento radicular indica que AH extraídos da torta de filtro podem ser utilizados como estimuladores do crescimento de plantas.

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Organic matter quality in a soil cultivated with perennial herbaceous legumes

Cited by 24 publications

References 19 publications

Humic Haplustox under different land uses in a high altitude environment in the Agreste region of Pernambuco, Brazil

Humic Haplustox under different land uses in a high altitude environment in the Agreste region of Pernambuco, Brazil

Indicadores químicos de qualidade da matéria orgânica de solo da sub-bacia do Rio das Mortes sob manejos diferenciais de cafeeiro

Humic substances isolated from residues of sugar cane industry as root growth promoter

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