Decomposição e ciclagem de nutrientes dos resíduos de quatro plantas de cobertura do solo

Teixeira, M.B.; Loss, Arcângelo; Pereira, Marcos Gervásio; Pimentel, Carlos

doi:10.4067/s0718-34292012000100007

Cited by 28 publications

(13 citation statements)

References 2 publications

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“…The mobility of nutrients is increased when plant residues deposited on soil surface are fragmented or incorporated, accelerating the process of organic matter decomposition, mineralization and nutrient cycling (Teixeira et al, 2012); however, this was not observed in this study, since there were no significant differences between the mowing area and the mowing + incorporation area, perhaps because the incorporation of plant residue has been done manually and superficially.…”

Section: Resultscontrasting

confidence: 62%

“…For Otsubo et al (2012), the association of MT and the green manure from crop residues offers more favorable conditions for cassava root growth and crop development, and maintain or increase the content of soil organic matter (SOM) improving soil fertility (Teixeira et al, 2012;Pacheco et al, 2017). According to García-Orenes et al (2010), the addition of OM alters the physical, chemical and biological attributes of the soil and has been used as an indicator of soil quality, since it is sensitive to changes caused by the management system adopted (Lima et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Chemical attributes and microbial activity of soil cultivated with cassava under different cover crops

Araújo

Barroso

Freitas

et al. 2019

Rev. bras. eng. agríc. ambient.

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Conservationist systems of crop management increases the amount of substrate, alters fertility and increases soil biological activity. The objective of this study was to evaluate the influence of soil management systems on the chemical attributes and microbial activity of soil under cassava crop. The experiment was set as completely randomized design in a factorial scheme of 2 x 3 x 2, being two systems of cultivation (minimum with only mown; minimum with mown and incorporation), three types of soil coverage (fallow; Crotalaria juncea L.; Canavalia ensiformis L.) and two soil depths (0-0.10 and 0.10-0.20 m), with four repetitions. The production of dry mass from cover crops, the soil chemical attributes and the soil microbial activity were evaluated. There were no differences between management systems, and the C. juncea cover crop presented superior dry mass production among the soil coverages. The concentrations of soil Ca and K were greater in the fallow coverage and C. juncea areas in the 0-0.10 m soil layer; however, these nutrients differ in the soil layer below (0.10-0.20 m). There were no differences for the basal respiration of soil microorganisms in both soil depths or among soil coverage, but the carbon from microbial biomass was superior in the most superficial soil layer where more substrate is available to soil microorganisms.Atributos químicos e atividade microbiana do solo cultivado com mandioca sob diferentes coberturas vegetais RESUMO: O aporte de resíduos vegetais no solo proporcionado pelos sistemas conservacionistas de manejo aumenta a quantidade de substrato, altera a fertilidade e aumenta a atividade biológica do solo. O objetivo deste estudo foi avaliar a influencia dos sistemas de manejo nos atributos químicos e na atividade microbiana do solo sob cultivo de mandioca. Com delineamento inteiramente casualizado, em esquema fatorial 2 x 3 x 2, foram avaliados dois sistemas de cultivo mínimo (somente roçado; roçado e incorporado), três tipos de cobertura (pousio; Crotalaria juncea L.; Canavalia ensiformis L.) e duas profundidades (0-0,10 e 0,10-0,20 m), com quatro repetições. Foram avaliados a produção de massa seca das coberturas, os atributos químicos e a atividade microbiana do solo. Não houve diferenças entre sistemas de cultivo mínimo e a C. juncea apresentou a maior produção de massa seca. Os teores de potássio e cálcio foram superiores nas áreas com resíduos de pousio e C. juncea na camada de 0-0,10 m; no entanto, estes nutrientes diferem na camada do solo abaixo 0,10-0,20 m. Não houve diferenças entre a respiração basal de microorganismo do solo em ambas as profundidades e coberturas, mas o carbono da biomassa microbiana foi superior na camada mais superficial, onde há mais substrato disponível para os microorganismos do solo.

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Section: Resultscontrasting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Chemical attributes and microbial activity of soil cultivated with cassava under different cover crops

Araújo

Barroso

Freitas

et al. 2019

Rev. bras. eng. agríc. ambient.

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“…The higher remaining K content in the RY residue can be explained by its high t ½ (90 days) of DM (Table 2), and the high content of non-structural biomass (735.48 g kg -1) ( Table 1). The low contents of remaining K at 30 DAD (Figure 3c) are due to the high solubility of this element in the tissue, since it does not bind to any structural component, which facilitates its quick release (Pavinato and Rosolem, 2008) and high content in the soil (Teixeira et al, 2012;Ferreira et al, 2014).…”

Section: Treatment Days After Deposition Of Litter Bags (Dad)mentioning

confidence: 99%

“…In addition, the increase in air temperature, and consequently in soil temperature, as well as rainfall, that occurred during the experiment may have contributed to increase breakdown of residues by microorganisms (Figures 1a and 1b) (Teixeira et al, 2011(Teixeira et al, , 2012 (-kt) ) to the values of remaining dry matter (DM), total organic carbon (TOC), lignin (Lig), cellulose (Cel), non-structural biomass (Bio), nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg); decomposition constant (k); and half-life (t ½ ) of each compartment and R 2 values for the residues of weeds (WD), black oat (BO), rye (RY), oilseed radish (RD), oilseed radish + black oat (RD + BO), and oilseed radish + rye (RD + RY) deposited on the onion row Rev Bras Cienc Solo 2016;40:e0150099 ) and C/N ratio value (22), and its low Cel/Lig ratios (3) ( Table 1). Residues with high levels of lignin, and consequently higher Lig/N ratio values and lower Cel/Lig values, have slower decomposition, since lignin protects cell wall cellulose from microbial degradation (Berg and McClaugherty, 2008).…”

Section: Residue Decomposition and Nutrient Releasementioning

confidence: 99%

“…Decomposition of plant residues and the consequent release of nutrients depend on climate and soil conditions, such as temperature, moisture, pH, oxygen, and content of plant nutrients in the soil; furthermore, the chemical composition of plant biomass, such as cellulose, lignin, and non-structural biomass contents are relevant, as well as C/N, lignin/N, and lignin/P ratios (Trinsoutrot et al, 2000;Tagliavini et al, 2007;Cornwell et al, 2008;Teixeira et al, 2012). In general, cover crop plant residues with more lignin and higher C/N, lignin/N, and lignin/P ratios, such as those of black oat and rye, decompose and release nutrients to the soil more slowly and gradually .…”

Section: Introductionmentioning

confidence: 99%

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Cover Crops Effects on Soil Chemical Properties and Onion Yield

Oliveira

Brunetto

Loss

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:Cover crops contribute to nutrient cycling and may improve soil chemical properties and, consequently, increase crop yield. The aim of this study was to evaluate cover crop residue decomposition and nutrient release, and the effects of these plants on soil chemical properties and on onion (Allium cepa L.) yield in a no-tillage system. The experiment was carried out in an Inceptisol in southern Brazil, where cover crops were sown in April 2012 and 2013. In July 2013, shoots of weeds (WD), black oats (BO), rye (RY), oilseed radish (RD), oilseed radish + black oats (RD + BO), and oilseed radish + rye (RD + RY) were cut at ground level and part of these material from each treatment was placed in litter bags. The litter bags were distributed on the soil surface and were collected at 0, 30, 45, 60, 75, and 90 days after distribution (DAD). The residues in the litter bags were dried, weighed, and ground, and then analyzed to quantify lignin, cellulose, non-structural biomass, total organic carbon (TOC), N, P, K, Ca, and Mg. In November 2012 and 2013, onion crops were harvested to quantify yield, and bulbs were classified according to diameter, and the number of rotted and flowering bulbs was determined. Soil in the 0.00-0.10 m layer was collected for chemical analysis before transplanting and after harvesting onion in December 2012 and 2013. The rye plant residues presented the highest half-life and they released less nutrients until 90 DAD. The great permanence of rye residue was considered a protection to soil surface, the opposite was observed with spontaneous vegetation. The cultivation and addition of dry residue of cover crops increased the onion yield at 2.5 Mg ha -1 .

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Soil chemical properties and yield of onion crops grown for eight years under no-tillage system with cover crops

Souza

Júnior

Kürtz

et al. 2021

Soil and Tillage Research

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Decomposição e ciclagem de nutrientes dos resíduos de quatro plantas de cobertura do solo

Cited by 28 publications

References 2 publications

Chemical attributes and microbial activity of soil cultivated with cassava under different cover crops

Chemical attributes and microbial activity of soil cultivated with cassava under different cover crops

Cover Crops Effects on Soil Chemical Properties and Onion Yield

Soil chemical properties and yield of onion crops grown for eight years under no-tillage system with cover crops

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