Tillage impacts on soil microbial biomass C, N and P, earthworms and agronomy after two years of cropping following permanent pasture in New Zealand

Aslam, T.; Choudhary, Madhu; Saggar, Surinder

doi:10.1016/s0167-1987(99)00032-x

Cited by 64 publications

(29 citation statements)

References 27 publications

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“…Soil micro-organism is the moderator of soil material circulation, and it is the part of soil organic carbon pool and available nutrient. Previous research has verified that soil microbial biomass C and N are good indicators to estimate the changing conditions in soil fertility resulted in land use changes and vegetation restoration (Aslam et al 1999;Bolinder et al 1999).We discovered that C mic and N mic were closely related to SOC and TN. The most litter accumulation and root exudate, the greater SOC and TN accumulation, the higher soil microbial biomass and stronger soil microbial activity.…”

Section: Plant Functional Traits and The Soil Propertymentioning

confidence: 53%

Plant functional traits and soil microbial biomass in different vegetation zones on the Loess Plateau

Xue

Cheng

et al. 2014

Journal of Plant Interactions

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Plant functional traits built the relationships between plant diversity, species composition, and physiology along with the environmental changes, thus influencing soil microbial community. As the sensitivity indicators, soil microbial biomass and plant functional traits responses soil micro-organism and plant characteristics in direct way. Ten plant functional traits of 149 species and soil microbial biomass (carbon, nitrogen, and phosphorus) were analyzed across the different vegetation types (forest, forest-steppe, and steppe) that are divided by environmental gradient (temperature and precipitation), aimed to find the correlations among them. Our results confirmed the greatest values of plant functional traits (except the leaf density and the fine root density) that were distributed in the steppe zone, mainly due to the different mean annual temperature and mean annual precipitation conditions. For different plant growth forms, the plant functional traits were significant differences among the vegetation zones. The advantages of higher rate nutrient cycling, plentiful biomass supplements, and favorite habit conditions lead to the forest-steppe zone with the highest C mic and N mic concentrations. The canonical correlation analysis indicated that leaf nitrogen, root nitrogen, and fine root densities were correlated with root exudate and tissue which affected the concentrations of soil organic carbon (SOC) and total nitrogen (N), consequently impacting soil microbial biomass carbon (C mic ) and soil microbial biomass nitrogen (N mic ). Soil is the medium that connects micro-organism and plant root system that influenced leaf nitrogen, root nitrogen, and fine root density of plant functional traits, the concentrations of SOC and total N that plant feedback are consequently influencing C mic and N mic .

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Section: Plant Functional Traits and The Soil Propertymentioning

confidence: 53%

Plant functional traits and soil microbial biomass in different vegetation zones on the Loess Plateau

Xue

Cheng

et al. 2014

Journal of Plant Interactions

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“…Portions of Manawatu fine sandy loam and Waitarere sand were incubated at field capacity at ambient temperature with four rates (0, 2.5, 5.0 or 10.0 t/ha) of individual biochars. The amounts of biochar incorporated were calculated on the 200 mm ploughing depth commonly used in the district (Aslam et al 1999;Horne et al 1992;Sparling et al 1992). After 21 days, to allow equilibration and mitigation of the liming effect of biochars (Laird 2008), 250 g samples of each soilÁbiochar mix and a control of soil only were spread thinly and evenly on moist Anchor regular weight seed germination paper (ISTA 2009).…”

Section: Methodsmentioning

confidence: 99%

The effect of biochars on maize (Zea mays) germination

Free

McGill

Rowarth

et al. 2010

New Zealand Journal of Agricultural Research

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Biochar made from biosolids, corn stover, eucalyptus, fresh pine or willow pyrolysed at 5508C and incorporated into Manawatu fine sandy loam or Waitarere sand at rates from 0 to 10 t/ha did not significantly affect the germination or early growth (root and coleoptile length, and dry weight) of maize seeds. There were no interactions between type or rate of biochar with soil type. The results suggest that biochar incorporation prior to a maize crop should be investigated as a method of increasing stable soil carbon with the potential for mitigating carbon emissions.

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“…No entanto, a relação C:CHO da biomassa microbiana pode não ser o indicador mais adequado, pois não depende apenas da predominância de um ou outro grupo microbiano, mas também do metabolismo, do estado de nutrição e da fase de crescimento das células microbianas (Chapman & Gray, 1981;Badalucco et al, 1990).…”

Section: Resultsunclassified

“…No estabelecimento das relações entre seus constituintes, foram determinadas as quantidades de C (Jenkinson & Powlson, 1976), N (Brookes et al, 1985), N reativo com ninidrina (N-Nin) (Badalucco et al, 1992) e de carboidratos da biomassa microbiana (Badalucco et al, 1990).…”

Section: Methodsunclassified

“…Aslam et al (1999) encontraram relações C:N menores na biomassa microbiana em solo sob plantio direto em duas das três avaliações realizadas pelos autores. Estes resultados indicam que, ao menos em determinados períodos, a biomassa microbiana no sistema plantio direto pode ser predominantemente bacteriana, apresentando uma relação C:N menor do que a do sistema convencional, o que resultaria em um maior potencial de imobilização de nitrogênio.…”

Section: Introductionunclassified

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Alterações microbianas no solo durante o ciclo do milho nos sistemas plantio direto e convencional

Vargas

Selbach

Sá

2004

Pesq. agropec. bras.

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Resumo -A disponibilidade de resíduos de aveia-preta, com relação C:N elevada, resulta em imobilização microbiana de nitrogênio no solo, exigindo cuidados no manejo da adubação nitrogenada da cultura subseqüente. O objetivo deste trabalho foi avaliar as alterações na estrutura da comunidade microbiana ao longo do ciclo do milho, na presença de resíduos de aveia-preta e da aplicação de nitrogênio. Foram coletadas amostras de um Argissolo Vermelho distrófico no dia da semeadura do milho e 46, 62, 88 e 112 dias após a semeadura. O nitrogênio foi aplicado 25 dias e 49 dias após a semeadura. As alterações na comunidade microbiana foram avaliadas mediante relações entre carbono (C) e nitrogênio (N), nitrogênio reativo com ninidrina (N-Nin) e carboidratos (CHO) da biomassa microbiana, além da análise do rDNA fúngico e bacteriano. As diferenças na composição da comunidade microbiana, reveladas pela análise do rDNA, relacionaram-se mais com as relações C:N e C:N-Nin do que com a relação C:CHO. As relações C:N-Nin e C:N e as avaliações do rDNA mostraram um predomínio inicial de população fúngica. Com a aplicação de N, a população bacteriana tornou-se preponderante e, ao final do ciclo do milho, retornou para uma condição semelhante à inicial.Termos para indexação: biomassa microbiana, PCR, preparos de solo, imobilização de nitrogênio, Zea mays. Microbial changes in soil during a maize crop season in no-till and conventional systemsAbstract -The availability of black oat residues, with high C:N ratio, leads to microbial immobilization of soil nitrogen, demanding special strategies to supply nitrogen to subsequent crops. The objective of this work was to evaluate shifts in microbial community structure due to the availability of black oat residues and nitrogen applications during the corn growing season. Soil (Paleudult) samples were collected on the day of the corn seeding and after 46, 62, 88 and 112 days. Nitrogen fertilizer was applied 25 and 49 days after corn seeding. Changes in microbial community were assessed by microbial biomass carbon (C) and nitrogen (N), ninhydrinreactive N (N-Nin) and carbohydrates (CHO) ratios, besides the analysis of the rDNA of bacteria and fungi. Changes in microbial community shown by rDNA analysis were more related to C:N and C:N-Nin ratios than to C:CHO ratio. The C:N and C:N-Nin ratios and the analysis of the rDNA showed that microbial community was predominantly fungal at the beginning of the evaluation period. After nitrogen application, the bacterial population became preponderant and, at the end of the evaluation period, microbial community turned back to a composition similar to the initial.

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Tillage impacts on soil microbial biomass C, N and P, earthworms and agronomy after two years of cropping following permanent pasture in New Zealand

Cited by 64 publications

References 27 publications

Plant functional traits and soil microbial biomass in different vegetation zones on the Loess Plateau

Plant functional traits and soil microbial biomass in different vegetation zones on the Loess Plateau

The effect of biochars on maize (Zea mays) germination

Alterações microbianas no solo durante o ciclo do milho nos sistemas plantio direto e convencional

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