Indicadores biológicos de qualidade do solo em diferentes sistemas de uso no brejo paraibano

Pôrto, Mônica Lima Alves; Alves, Jailson do Carmo; Diniz, Adriana Araújo; Souza, Adaílson Pereira de; Santos, Djail

doi:10.1590/s1413-70542009000400010

Cited by 25 publications

(23 citation statements)

References 18 publications

(23 reference statements)

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“…However, Pôrto et al (2009) and Cunha et al (2011) observed greater microbial biomass in soils under conditions of native vegetation than under cropping systems. According to Xue-Mei et al (2007) the greater microbial activity in soils with native vegetation or cultivated with a great diversity of species occurs due to regularity in the supply of the substrates used by the microbial community.…”

Section: Resultsmentioning

confidence: 85%

Biological activity of soils under systems of organic farming, agroforestry and pasture in the Amazon

Silva¹,

Neto²,

Kusdra³

2014

Rev. Ciênc. Agron.

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-The aim of this work was to evaluate biological indicators of soils used under the systems of organic farming, agroforestry and pasture in the south western part of the Amazon region of Brazil. The experiment was carried out at the Seridó Ecological Site, located in Rio Branco, in the state of Acre, Brazil. The experimental design was completely randomised, with five treatments (land-use systems) and six replications, with each replication consisting of four single samples. The systems of land use evaluated were: 1) native forest (control); 2) agroforestry (AFS); 3) pasture; 4) intercropped passion fruit, maize, cassava, pineapple and forage peanut; and 5) intercropped passion fruit, maize, cassava, pineapple and tropical kudzu. It was found that organic farming systems intercropped with kudzu resulted in smaller losses of C-CO 2 through edaphic respiration, and a greater accumulation of microbial biomass carbon. The intercropped organic farming system which included the forage peanut resulted in a greater loss than retention of carbon in the soil at a depth of 5-10 cm. Soil under the agroforestry system was equivalent to the soil of the control (native forest) in relation to the release and retention of carbon through biological activity. At a depth of 5-10 cm, soils under pasture presented similar microbial biomass to those under organic cultivation intercropped with tropical kudzu. However, at that depth, soils under pasture presented greater microbial biomass than those under natural forest, agroforestry or organic cultivation intercropped with forage peanut.

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Section: Resultsmentioning

confidence: 85%

Biological activity of soils under systems of organic farming, agroforestry and pasture in the Amazon

Silva¹,

Neto²,

Kusdra³

2014

Rev. Ciênc. Agron.

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“…(RBS), quociente metabólico (qCO 2 ) e quociente microbiano(qMIC) de acordo com as culturas de cobertura e camadas estudadas, no experimento sob preparo convencional com a cultura do feijoeiro, no experimento sob semeadura direta com a cultura do feijoeiro, no experimento sob preparo convencional com a cultura do milho e no experimento sob semeadura direta com a cultura do milho Perez et al, 2004;Pôrto et al, 2009). A maior redução em CBM nos experimentos sob preparo convencional sinaliza que esse sistema de preparo contribui para reduzir a quantidade e, possivelmente, a diversidade de microrganismos, com grande impacto na microbiota do solo.…”

Section: Quadro 1 Carbono Orgânico Total (Cot) Carbono Da Biomassa unclassified

Sistemas de preparo do solo e culturas de cobertura na produção orgânica de feijão e milho: II - atributos biológicos do solo

Cunha

Stone

Ferreira

et al. 2011

Rev. Bras. Ciênc. Solo

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Section: Resultsmentioning

confidence: 99%

“…Increased C-CO 2 evolution by the microbial community may mean that individuals are working in conditions that are not ideal for their metabolism, resulting in a greater loss of soil C to the atmosphere (PÔRTO et al, 2009). The increase in MBC is often positively correlated with the MSR (BALOTA et al, 1998;PÔRTO et al, 2009). However, D'Andréa et al (2002 evaluated the impact of management systems on the microbial community, and observed that even with a variation of 200% in MBC between the systems, the MSR remained unchanged, which probably indicated a change in the composition of microorganisms (ANDERSON; DOMSCH, 1993).…”

Section: Resultsmentioning

confidence: 99%

Earthworms and root-knot nematodes: effect on soil biological activity and tomato growth

Demetrio

Dionísio

Maceda³

2017

SCA

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Earthworms are a representative soil invertebrate, and their living habits are known to influence a large diversity of organisms. The objective of this study was to evaluate the ability of Amynthas spp. to change the biological attributes of soil, and its potential to reduce infection by root-knot nematodes on tomato crop. The study was conducted in the greenhouse of the Diagnostic Center Marcos Enrietti, Federal University of Paraná, Brazil. The treatments earthworms at the following densities: control (absence of earthworms), two, four, six, and eight, which were inoculated into different pots, with five replicates per group. In each pot, a single tomato plant (Solanum lycopersicum) was used, and a suspension of Meloidogyne javanica containing 3000 eggs and/or juveniles was added 14 days after seeding. During the experiment, edaphic respiration was evaluated at 96-h intervals. After 91 days, soil microbial biomass carbon (MBC), microbial soil respiration (MSR), the metabolic quotient (qCO 2 ), dry mass of roots (DMR), dry mass of plants (DMP), and the number of root galls were determined per plant. We observed that inoculation with higher earthworm densities increased the MBC. Furthermore, the lowest earthworm density (two animals) resulted in a MBC that was 75% higher than that of the control treatment (earthworms absent). There was a positive correlation between MBC and DMP, and a negative correlation between MBC and qCO 2 . The DMR was not influenced by inoculation with earthworms. A linear increase in DMP was observed with earthworms; however, gall formations on the tomato root were not suppressed. Key words: Amynthas spp. Edaphic respiration. Meloidogyne javanica. Microbial biomass. ResumoAs minhocas são um dos mais representativos invertebrados do solo e sabe-se que seus hábitos de vida influenciam uma grande diversidade de outros organismos. O objetivo deste estudo foi avaliar a capacidade de Amynthas spp. em alterar alguns atributos biológicos do solo e seu potencial em reduzir a infecção de nematoides formadores de galhas na cultura do tomate. O estudo foi conduzido em casa de vegetação no Centro Diagnóstico Marcos Enrietti, Universidade Federal do Paraná, Brasil. Os tratamentos foram diferentes densidades de minhocas: Controle (ausência de minhocas), dois, quatro, seis e oito indivíduos inoculados por vaso, com cinco repetições. Em cada vaso foi utilizada uma única plântula de tomate (Solanum lycopersicum), onde, aos 14 dias após a semeadura foi adicionada uma suspensão contendo 3000 ovos e/ou juvenis de Meloidogyne javanica.

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Indicadores biológicos de qualidade do solo em diferentes sistemas de uso no brejo paraibano

Cited by 25 publications

References 18 publications

Biological activity of soils under systems of organic farming, agroforestry and pasture in the Amazon

Biological activity of soils under systems of organic farming, agroforestry and pasture in the Amazon

Sistemas de preparo do solo e culturas de cobertura na produção orgânica de feijão e milho: II - atributos biológicos do solo

Earthworms and root-knot nematodes: effect on soil biological activity and tomato growth

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