Frações oxidáveis do carbono orgânico em argissolo vermelho-amarelo sob sistema de aleias

Loss, Arcângelo; Pereira, Marcos Gervásio; Ferreira, Edilene Pereira; Santos, Lauana Lopes dos; Beutler, Sidinei Júlio; Júnior, Altamiro Souza de Lima Ferraz

doi:10.1590/s0100-06832009000400011

Cited by 16 publications

(7 citation statements)

References 16 publications

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“…In P3, TOC consists of parts of balanced oxidizable fractions of SOM (F1+F2, 52 % of TOC and F3+F4, 48 % of TOC in both layers) tending to reach a balance. Loss et al (2009) suggested that it would be interesting to use a management system tending to establish the same proportions between the C fractions, with one part of the organic matter being easily decomposable for nutrient mineralization and the other more resistant part as reserve in the soil to improve and/or maintain the soil physical properties.…”

Section: Oxidizible Organic Carbon Fractionsmentioning

confidence: 99%

“…When soils are cultivated, alterations are observed in the SOM quality, notably in the degree of oxidation and lability (Blair et al, 1995;Loss et al, 2009). Chan et al (2001) proposed a modification of the classical method proposed by Walkley & Black (1934) to analyze the oxidizable fraction of soil organic carbon (OC) by separation of total organic carbon (TOC) in four fractions, based on the different degrees of oxidation, using increasing concentrations of sulfuric acid (F1, F2, F3, and F4).…”

Section: Introductionmentioning

confidence: 99%

“…The oxidizable organic carbon fractions, especially the most labile fractions represented by F1 and F2, are considered sensitive to impacts caused by soil management (Chan et al, 2001;Maia et al, 2007;Loss et al, 2009Loss et al, , 2010Barreto et al, 2011). In addition, microbial biomass and soil enzymatic activity are also considered good indicators of the impacts caused by soil management (Perez et al, 2004;Nunes et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Microbiological properties and oxidizable organic carbon fractions of an oxisol under coffee with split phosphorus applications and irrigation regimes

Costa

Sato

Ramos

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYPhosphorus fertilization and irrigation increase coffee production, but little is known about the effect of these practices on soil organic matter and soil microbiota in the Cerrado. The objective of this study was to evaluate the microbiological and oxidizable organic carbon fractions of a dystrophic Red Latossol under coffee and split phosphorus (P) applications and different irrigation regimes. The experiment was arranged in a randomized block design in a 3 x 2 factorial design with three split P applications (P1: 300 kg ha -1 P 2 O 5 , recommended for the crop year, of which two thirds were applied in September and the third part in December; P2: 600 kg ha -1 P 2 O 5 , applied at planting and then every two years, and P3: 1,800 kg ha -1 P 2 O 5 , the requirement for six years, applied at once at planting), two irrigation regimes (rainfed and year-round irrigation), with three replications. The layers 0-5 and 5-10 cm were sampled to determine microbial biomass carbon (MBC), basal respiration (BR), enzyme activity of acid phosphatase, the oxidizable organic carbon fractions (F1, F2, F3, and F4), and total organic carbon (TOC). The irrigation regimes increased the levels of MBC, microbial activity and acid phosphatase, TOC and oxidizable fractions of soil organic matter under coffee. In general, the form of dividing P had little influence on the soil microbial properties and OC. Only P3 under irrigation increased the levels of MBC and acid phosphatase activity.Index terms: P cycling, soil microbial activity, acid phosphatase, soil organic matter.( Adriana Rodolfo da Costa et al. RESUMO: ATRIBUTOS MICROBIOLÓGICOS E FRAÇÕES OXIDÁVEIS DO CARBONO ORGÂNICO DE LATOSSOLO CULTIVADO COM CAFEEIRO, SOB PARCELAMENTOS DE FÓSFORO E REGIMES HÍDRICOS

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Section: Oxidizible Organic Carbon Fractionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microbiological properties and oxidizable organic carbon fractions of an oxisol under coffee with split phosphorus applications and irrigation regimes

Costa

Sato

Ramos

et al. 2013

Rev. Bras. Ciênc. Solo

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“…Legumes have deep roots, can intercept percolated nutrients along the soil profile, and can access nutrients accumulated in the layers below the root zone of annual crops. These nutrients absorbed by the root system of the trees become inputs in the form of plant residues [10]. In general, legume residues provide Ca and Mg for agricultural crops.…”

Section: Macronutrient Leaf Contents and Productivitymentioning

confidence: 99%

Leguminous Alley Cropping Improves the Production, Nutrition, and Yield of Forage Sorghum

et al. 2019

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This study aimed to evaluate the growth, production, and leaf contents of macronutrients, as well as the yield of forage sorghum cultivated on the alleys of Gliricidia (Gliricidia sepium (Jacq.) Kunth ex Walp.) and Leucaena (Leucaena leucocephala (Lam.) de Wit) in the presence and absence of mineral fertilization. The experiment was conducted in two different periods: During the 2016/2017 double crop (cultivation carried out at the end of the crop cycle) and during the 2017/2018 crop (cultivation carried out at the beginning of the crop cycle). A randomized block design, in which the first factor refers to cultivation systems (single sorghum, sorghum cultivated in Gliricidia alleys, and sorghum cultivated in Leucaena alleys) and the second factor refers to mineral fertilization (presence and absence of fertilization), in a 3 × 2 factorial arrangement was used. The leguminous plants were cut, and the residues were deposited in the alleys. The cultivation in alleys without mineral fertilization increased total forage biomass when compared to the single crop cultivation. Cultivation in Leucaena alleys showed a higher leaf content of nitrogen (N) when compared to the single crop, both in the presence and absence of mineral fertilization. In the double crop, sorghum cultivated in Leucaena alleys without fertilization presented a higher forage yield (up to 67%) when compared to the single crop system. However, there was no difference in yield when mineral fertilization was applied to the treatments. Overall, the alley crops were able to increase the morphological (plant height (PH), stem diameter (SD), panicle diameter (PD), and panicle length (PL) and yield (leaf dry mass (LDM), stem dry mass (SDM), total green mass (TGM), and total dry mass TDM) variables of the crop, improving the productivity of forage sorghum.

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“…Por ser uma espécie rústica e de rápido crescimento, é utilizada em reflorestamentos heterogêneos destinados à reconstituição da vegetação e à recuperação de áreas degradadas (Lorenzi, 2008). Além disso, o sombreiro possui potencial para cobertura de áreas degradadas atuando como adubo verde, uma vez que possui alta capacidade de nodular e fixar nitrogênio (Loss et al, 2009;Nobre et al, 2010).…”

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Morfologia de frutos, sementes e plântulas, e anatomia das sementes de sombreiro (Clitoria fairchildiana)

Costa¹,

Silva²,

Gomes³

2014

RCA

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Atualmente, é crescente a preocupação com a restauração de áreas degradadas utilizando-se espécies nativas; porém, os estudos e informações sobre muitas espécies com potencial para atender a esse tipo de demanda ainda são escassos ou insufi cientes, em face da complexidade dos processos ecológicos envolvidos. Dentre as espécies com potencial de uso, pode-se citar a Clitoria fairchidiana. O objetivo deste trabalho foi estudar a morfologia de frutos, sementes e plântulas de C. fairchildiana, bem como a anatomia da sua semente. As sementes foram coletadas em matrizes dos municípios de Alegre e Jerônimo Monteiro, Estado do Espírito Santo, Brasil. Para a obtenção da curva de embebição das sementes, utilizaram-se três repetições de dez sementes. Para descrição morfológica dos frutos e sementes, foram examinadas 100 unidades, retiradas aleatoriamente do lote coletado. Foram fotografadas e descritas as características morfológicas dos frutos, sementes e plântulas. A estrutura anatômica da semente foi observada por meio da microscopia óptica, utilizando-se seções histológicas transversais. O fruto é do tipo legume, retilíneo ou levemente curvo, longo, seco e deiscente, com coloração castanha na maturidade. As sementes são exalbuminosas, orbiculares e plano-convexas. O sombreiro apresentou germinação fanerocotiledonar epígea. As características morfológicas e anatômicas estudadas são homogêneas em todas as fases e, portanto, podem ser utilizados para a identifi cação da espécie. ABSTRACT: Currently, there is growing concern about the restoration of degraded areas using native species, but studies and information on many species with potential to meet this type of demand are scarce or insuffi cient, given the complexity of the ecological processes involved. Clitoria fairchidiana is among the species with this potential use. The present work aimed to study the morphology of fruits, seeds and seedlings of C. fairchildiana, as well as the anatomy of its seeds. The seeds were collected from parent trees in the municipalities of Jerônimo Monteiro and Alegre, Espírito Santo state, Brazil. Three replications of 10 seeds each were used to obtain the curve of seed imbibition. One hundred units, chosen randomly in the batch collected, were examined to perform the morphological description of fruits and seeds. The morphological characteristics of fruits, seeds and seedlings were photographed and described. The anatomical structure of the seed was observed by optical microscopy using histological cross sections. The fruit is legume-type, straight or slightly curved, long, dry and dehiscent, with nut-brown coloration at maturity. The seeds are unalbuminous, orbicular and plano-convex. The sombreiro presented phanerocotylar epigeal germination. The morphological and anatomical characteristics studied are homogeneous in all phases and, therefore, can be used for species identifi cation.

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Frações oxidáveis do carbono orgânico em argissolo vermelho-amarelo sob sistema de aleias

Cited by 16 publications

References 16 publications

Microbiological properties and oxidizable organic carbon fractions of an oxisol under coffee with split phosphorus applications and irrigation regimes

Microbiological properties and oxidizable organic carbon fractions of an oxisol under coffee with split phosphorus applications and irrigation regimes

Leguminous Alley Cropping Improves the Production, Nutrition, and Yield of Forage Sorghum

Morfologia de frutos, sementes e plântulas, e anatomia das sementes de sombreiro (Clitoria fairchildiana)

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