Changes in soil enzyme activity, fertility, aggregation and C sequestration mediated by conservation tillage practices and water regime in a maize field

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

doi:10.1016/j.apsoil.2005.01.004

Cited by 148 publications

(88 citation statements)

References 29 publications

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“…Available P did not increase in no-till treatments in our study. Similar results were reported by Roldán et al (2005), who found that slightly alkaline soil pH decreased solubility of P. High soil pH (~7.44) and low extractability of P suggested more stable P forms presented in soils when crop residues were added to soil (Zibilske et al 2002). Available P precipitated with soil Fe, Al, and Ca and became unavailable to plants.…”

Section: Discussionsupporting

confidence: 86%

Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts

Wang¹,

Chen²,

Chen³

et al. 2011

Plant Soil Environ.

102

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The effects of tillage and residue input amounts on soil phosphatase (alkaline phosphomonoesterase ALP, acid phosphomonoesterase ACP, phosphodiesterase PD, and inorganic pyrophosphatase IPP) activities and soil phosphorus (P) forms (total P, organic P, and available P) were evaluated using soils collected from a three-year experiment. The results showed that no-till increased soil total and organic P, but not available P as compared to conventional tillage treatments. Total P was increased as inputs of crop residue increased for no-till treatment. There were higher ALP and IPP activities in no-till treatments, while higher PD activity was found in tillage treatments and tillage had no significant effect on ACP activity. Overall phosphatase activities increased with an increase of crop residue amounts. Soil total P was correlated negatively with PD activity and positively with other phosphatase activities. Organic P had a positive correlation with ACP activity, but a negative correlation with PD activity. Available P had no significant correlation with phosphatase activities. Our data suggests that no-till and residue input could increase soil P contents and enhance the activities of phosphatase.

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Section: Discussionsupporting

confidence: 86%

Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts

Wang¹,

Chen²,

Chen³

et al. 2011

Plant Soil Environ.

102

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“…In turn, pasture had a higher percentage of aggregates in the 2.0-0.25 mm fraction. These results suggested that different vegetation covers significantly affect the stability and formation of soil aggregates (Roldán et al, 2005). Consequently, the accumulation of soil organic matter and nutrients are closely associated with vegetation covers (Rita et al, 2011).…”

Section: Mineralization Of Po In Soil Size Fractionsmentioning

confidence: 85%

Mineralization of organic phosphorus in soil size fractions under different vegetation covers in the north of Rio de Janeiro

Rita¹,

Gama-Rodrigues²,

Gama-Rodrigues³

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYIn unfertilized, highly weathered tropical soils, phosphorus (P) availability to plants is dependent on the mineralization of organic P (Po) compounds. The objective of this study was to estimate the mineralization of total and labile Po in soil size fractions of > 2.0, 2.0-0.25 and < 0.25 mm under leguminous forest tree species, pasture and "capoeira" (secondary forest) in the 0-10 cm layer of a RedYellow Latosol after 90 d of incubation. The type of vegetation cover, soil incubation time and soil size fractions had a significant effect on total P and labile P (Pi and Po) fraction contents. The total average Po content decreased in soil macroaggregates by 25 and 15 % in the > 2.0 and 2.0-0.25 mm fractions, respectively. In contrast, there was an average increase of 90 % of total Po in microaggregates of < 0.25 mm. Labile Po was significantly reduced by incubation in the > 2.0 (-50 %) and < 0.25 mm (-76 %) fractions, but labile Po increased by 35 % in the 2.0-0.25 mm fraction. The Po fraction relative to total extracted P and total labile P within the soil size fractions varied with the vegetation cover and incubation time. Therefore, the distribution of P fractions (Pi and Po) in the soil size fraction revealed the distinctive ability of the cover species to recycle soil P. Consequently, the potential of Po mineralization varied with the size fraction and vegetation cover. Because Po accounted for most of the total labile P, the P availability to plants was closely related to the mineralization of this P fraction.Index terms: Bowman's extraction method, leguminous forest tree species, pasture, capoeira (secondary forest).( (> 2,0, 2,0-0,25 e < 0,25 mm) RESUMO: MINERALIZAÇÃO DAS FRAÇÕES ORGÂNICAS DE FÓSFORO EM CLASSES DE AGREGADOS DO SOLO, SOB DIFERENTES COBERTURAS VEGETAIS DO NORTE FLUMINENSE Em solos tropicais altamente intemperizados, não fertilizados, a disponibilidade de P para as plantas é dependente da mineralização de compostos orgânicos com P (Po). O objetivo deste trabalho foi estimar a mineralização de Po total e de lábil em classes de agregados

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“…Compost-amended samples differed from noncompost-amended samples, showing elevated soil microbial activity and C mic . Compost amendments contribute to the buildup of SOM (Lal 2005;Roldan et al 2005;Ros et al 2006a) and change the microbial degradability and the diversity of organic substrates, resulting in an increased microbial biomass and diversity (Insam 1990;Carter 1996). In contrast, mineral fertiliser amendment can deplete soil organic matter (Six et al 1999;Ros et al 2006a, b).…”

Section: Basal Respiration and Microbial Biomassmentioning

confidence: 99%

“…In particular, soils with a low soil organic matter (SOM) content (e.g. below 2%) benefit from organic matter input (Lal 2005;Roldan et al 2005;Ros et al 2006a). Besides this, conversion of organic residues such as sewage sludge, green cut, organic wastes or animal manure into useable composts reduces the amount of waste deposed into landfill sites, thereby improving the cycling of matter.…”

Section: Introductionmentioning

confidence: 99%

Substrate-induced volatile organic compound emissions from compost-amended soils

et al. 2010

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The agronomic effects of composts, mineral fertiliser and combinations thereof on chemical, biological and physiological soil properties have been studied in an 18-year field experiment. The present study aimed at tracing treatment effects by evaluating the volatile organic compound (VOC) emission of the differently treated soils: non-amended control, nitrogen fertilisation and composts (produced from organic waste and sewage sludge, respectively) in combination with nitrogen fertiliser. Microbial community structure was determined by denaturing gradient gel electrophoresis (DGGE). Aerobic and anaerobic soil VOC emission was determined after glucose amendment using proton transfer reaction-mass spectrometry (PTR-MS). After inducing VOC production by substrate (glucose) addition and at the same time reducing oxygen availability to impair degradation of the produced VOCs, we were able to differentiate among the treatments. Organic waste compost did not alter the VOC emissions compared to the untreated control, whilst sewage sludge composts and mineral fertilisation showed distinct effects. This differentiation was supported by DGGE analysis of fungal 18S rDNA fragments and confirms earlier findings on bacterial communities. Three major conclusions can be drawn: (1) VOC patterns are able to discriminate among soil treatments.(2) Sewage sludge compost and mineral fertilisation have not only the strongest impact on microbial community composition but also on VOC emission patterns, but specific tracer VOCs could not be identified. (3) Future efforts should aim at a PTR-MS-linked identification of the detected masses.

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Changes in soil enzyme activity, fertility, aggregation and C sequestration mediated by conservation tillage practices and water regime in a maize field

Cited by 148 publications

References 29 publications

Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts

Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts

Mineralization of organic phosphorus in soil size fractions under different vegetation covers in the north of Rio de Janeiro

Substrate-induced volatile organic compound emissions from compost-amended soils

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