Soil enzyme activities suggest advantages of conservation tillage practices in sorghum cultivation under subtropical conditions

Roldán, A.; Salinas-García, J. R.; Alguacil, M.M.; Díaz, Eduardo; Caravaca, F.

doi:10.1016/j.geoderma.2004.12.042

Cited by 154 publications

(85 citation statements)

References 28 publications

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“…Other studies have also found β-glucosidase activity to be increased by reduced tillage. However, β-glucosidase activity did not appear to be more sensitive to tillage-induced changes in soil quality than other enzyme activities in these studies (Deng and Tabatabai 1996;Curci et al 1997;Alvear et al 2005;Roldán et al 2005;Madejón et al 2007). Therefore, our result may be site specific.…”

Section: Discussioncontrasting

confidence: 58%

Short-term dynamics of soil carbon, microbial biomass, and soil enzyme activities as compared to longer-term effects of tillage in irrigated row crops

Geisseler

Horwáth

2009

Biol Fertil Soils

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Section: Discussioncontrasting

confidence: 58%

Short-term dynamics of soil carbon, microbial biomass, and soil enzyme activities as compared to longer-term effects of tillage in irrigated row crops

Geisseler

Horwáth

2009

Biol Fertil Soils

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“…Furthermore NT increases the litter accumulation rate on the soil surface which improves both the C content and microbial activity (MOSCATELLI et al, 2005;ROLDÁN et al, 2005), indicating a close association between these results and the low impacts to the environment caused by the NT system (HERMLE et al, 2008).…”

Section: Resultsmentioning

confidence: 95%

“…Nowadays the trend is towards soil management practices capable of increasing the immobilization of atmospheric CO 2 . According to Hermle et al (2008), it may be possible to manipulate paddy soil through conservational tillage and crop practices, and thereby maintain adequate soil organic matter concentrations, and mitigate soil organic carbon loss from soil to atmosphere, which increases C content and microbial activity (FRANCHINI et al, 2007;MOSCATELLI et al, 2005;ROLDÁN et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Microbial soil quality indicators under different crop rotations and tillage management

et al. 2010

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-An experiment was carried out under field conditions to assess the effects of soil management (no-tillage-NT and conventional tillage-CT) and crop rotation systems on microbial biomass-C (C mic ), basal soil respiration (BSR), metabolic quotient (qCO 2 ), soil organic carbon content (C org ) and microbial carbon to organic carbon ratio (C mic /C org ). Soil samples were collected on an area cultivated with wheat as winter crop and soybean as summer crop, both in rotation with vetch, maize and oats. Samples were also collected in a secondary forest used as reference. Data of each management system (NT and CT) were compared to forest area by "t" test (p<0.05) and crop rotations were compared by Tukey test (p<0.05). All data were submitted to multivariate analysis (Principal Component Analysis -PCA). There were observed significant differences ("t" test; p<0.05) for C mic , BSR, qCO 2 and C mic /C org between NT and CT, by which NT values resemble those for forest area. For crop rotations significant differences (Tukey test; p<0.05) were found only for BSR and qCO 2 . The sum of the two first principal components on the PCA explained about 75% of the data variation. PCA showed NT closest to forest area than CT, especially treatments with soybean and vetch as consecutive crops. The forest area-NT clustering was mostly due to C mic and C mic /C org relationship. Results indicate that the NT system is more sustainable than the CT system and can contribute for the accumulation a greater quantity of carbon in soil.Key words -Microbial biomass. Microbial respiration. Organic matter. Soil management.Resumo -Foi conduzido um experimento sob condições de campo para avaliar o efeito da forma de manejo do solo (Plantio direto -PD e plantio convencional -PC) e dos sistemas de rotação de culturas sobre o carbono da biomassa microbiana (C mic ), respiração basal do solo (RBS), quociente metabólico (qCO 2 ), carbono orgânico total (C org ) e relação carbono da biomassa microbiana: carbono orgânico total (C mic /C org ). As amostras de solo foram coletadas em uma área cultivada com trigo como cultura de inverno e soja como cultura de verão, ambas em rotação com ervilhaca, milho e aveia preta. Amostras de solo também foram coletadas em uma floresta secundária usada com referência. Os dados de cada sistema de manejo do solo (PD e PC) foram comparados com a floresta secundária pelo teste "t" (p<0.05) e as rotações de culturas foram comparadas pelo teste de Tukey (p<0.05). Todos os dados foram submetidos a uma análise multivariada (Análise de Componentes Principais -ACP). Foram observadas diferenças significativas (teste "t"; p<0.05) para C mic , RBS, qCO 2 e C mic /C org entre PD e PC, em que estes valores foram semelhantes àqueles encontrados na floresta. Entre as rotações de culturas foram observadas diferenças significativas (teste de Tukey; p<0.05) apenas para RBS e qCO 2 . A análise de componentes principais mostrou que o PD aproximou-se mais da floresta do que o PC, especialmente nos tratamentos em que soja e ervilhac...

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“…The effects of nanomaterials on general soil processes and nutrient cycling were evaluated using four different enzyme activities. These enzyme activities are excellent indicators of soil microbial function, are key components in nutrient cycling (23,34,35), and have been applied in studies assessing soil quality and management (36). Soil acid phosphatase is an important enzyme in the catalysis of organic phosphate esters into inorganic phosphate, which is important in phosphorus mineralization and processing (37,38).…”

Section: Introductionmentioning

confidence: 99%

Impact of Fullerene (C60) on a Soil Microbial Community

Tong

Bischoff

Nies

et al. 2007

Environ. Sci. Technol.

319

212

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The nascent state of the nanoproduct industry calls for important early assessment of environmental impacts before significant releases have occurred. Clearly, the impact of manufactured nanomaterials on key soil processes must be addressed so that an unbiased discussion concerning the environmental consequences of nanotechnology can take place. In this study, soils were treated with either 1 μg C60 g-1 soil in aqueous suspension (nC60) or 1000 μg C60 g-1 soil in granular form, a control containing equivalent tetrahydrofuran residues as generated during nC60 formation process or water and incubated for up to 180 days. Treatment effects on soil respiration, both basal and glucose-induced, were evaluated. The effects on the soil microbial community size was evaluated using total phospholipid derived phosphate. The impact on community structure was evaluated using both fatty acid profiles and following extraction of total genomic DNA, by DGGE after PCR amplification of total genomic DNA using bacterial variable V3 region targeted primers. In addition, treatment affects on soil enzymatic activities for β-glucosidase, acid-phosphatase, dehydrogenase, and urease were followed. Our observations show that the introduction of fullerene, as either C60 or nC60, has little impact on the structure and function of the soil microbial community and microbial processes.

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Soil enzyme activities suggest advantages of conservation tillage practices in sorghum cultivation under subtropical conditions

Cited by 154 publications

References 28 publications

Short-term dynamics of soil carbon, microbial biomass, and soil enzyme activities as compared to longer-term effects of tillage in irrigated row crops

Short-term dynamics of soil carbon, microbial biomass, and soil enzyme activities as compared to longer-term effects of tillage in irrigated row crops

Microbial soil quality indicators under different crop rotations and tillage management

Impact of Fullerene (C60) on a Soil Microbial Community

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