Nitrogen mineralisation and the activity and populations of microflora in a high producing yellow-brown loam under pasture

Sarathchandra, S. U.; Upsdell, M.

doi:10.1080/00288233.1981.10420886

Cited by 13 publications

(2 citation statements)

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“…This could be due to the prolonged reduced plant coverage; where no plants are growing and actively taking mineralised N out of the soil and the decaying plant biomass and soil microorganisms are still generating N [79,80]. At Vermont South, higher levels of cobalt (Co) were measured in soils treated with steam (3.02 ppm) (Supplementary Table S9).…”

Section: Weed Management Strategies Had Little or No Effect On Soil P...mentioning

confidence: 99%

Comparative Analyses of Glyphosate Alternative Weed Management Strategies on Plant Coverage, Soil and Soil Biota

2021

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Glyphosate-based foliar spray herbicides are the most common method for urban weed control due to their broad-spectrum and efficacy for burndown applications. As interest in glyphosate alternatives has increased in recent years, this project assessed the efficacy of the following non-glyphosate-based alternative weed management strategies: glufosinate, imazapyr, MCPA + dicamba, prodiamine, pine oil, clove oil, nonanoic acid, acetic acid + hydrochloric acid and steam against untreated (negative) controls and glyphosate-treated sites. Across all four seasonal treatments (winter, spring, summer and autumn), glyphosate and glufosinate reduced weed coverage (>65% after 4 and 12 weeks); imazapyr reduced weed coverage by >80% after 12 weeks; and steam reduced weed coverage by >80% after 4 weeks, and after 12 weeks showed to reduce weed coverage by >20% after the second application. The MCPA + dicamba, prodiamine, pine oil, clove oil, nonanoic acid and acetic acid + hydrochloric acid treatments had mixed impacts on weed coverage. Minimal alterations to soil physicochemical properties were observed across the two sites for all treatments. Assessment of impacts the different weed management strategies had on arthropod and microbial relative abundance showed minimal alterations; with only steam observed to reduce relative microbial abundance. Glufosinate, imazapyr and steam may be considered alternatives to glyphosate for reducing weed coverage but may not be as effective or have undesirable off-target effects. Overall, glyphosate provided the most consistent weed reduction at both sites over 12 weeks, without any recorded negative off-target or soil biota impacts.

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Section: Weed Management Strategies Had Little or No Effect On Soil P...mentioning

confidence: 99%

Comparative Analyses of Glyphosate Alternative Weed Management Strategies on Plant Coverage, Soil and Soil Biota

2021

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“…A freqüência de populações de bactérias com atividade enzimática encontrada em solos com diferentes plantas ocorreu na seguinte ordem decrescente: proteolíticas > lipolíticas > amilolíticas > pectolíticas > celulolíticas (HANKIN et al, 1974). A calagem de área sob pastagem propiciou um aumento da população total de bactérias e de Gram negativas e bem como do carbono da biomassa microbiana, entretanto a mineralização do N orgânico não foi afetada (SARATHCHANDRA & UPSDELL, 1981). SALAMA et al.…”

Section: Introductionunclassified

Microrganismos produtores de hidrolases envolvidos nas transformações dos compostos do carbono e do nitrogênio do solo

Sanomiya

Nahas

2003

Cienc. Rural

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RESUMOAvaliou-se o efeito de culturas de braquiária e guandu, da adubação fosfatada e da calagem sobre bactérias e fungos amilolíticos, celulolíticos, proteolíticos e ureolíticos. A proporção das bactérias com atividade enzimática em relação ao total variou de 25 a 87% e, a dos fungos, de 2 a 36%. Os grupos de bactérias aumentaram sua população nas parcelas em que se aplicou superfosfato e calcário em relação aos outros tratamentos (exceto as ureolíticas que aumentaram na ausência de adubo) e os fungos prevaleceram na ausência de adubação (exceto os ureolíticos que aumentaram com superfosfato) e de calagem. No solo cultivado com braquiária, foram obtidas as maiores contagens de bactérias ureolíticas e fungos proteolíticos. Na ausência de planta, preponderaram os fungos CM-celulolíticos (CM, celulose microcristalina) e ureolíticos e na presença de guandu, os amilolíticos e CMC-celulolíticos (CMC, carboximetilcelulose). Os demais grupos de bactérias não foram influenciados pelo sistema de cultivo. A população e a habilidade enzimática dos fungos foram menores que as das bactérias, o que sugere menor participação na transformação dos nutrientes no solo. As bactérias apresentaram múltiplas atividades enzimáticas, mostrando maior versatilidade que os fungos.Palavras-chave: bactérias, fungos, amilolíticos, celulolíticos, proteolíticos, ureolíticos, fósforo, braquiária, guandu. ABSTRACTThe effect of plant cultures, Brachiaria ruziziensis, Cajanus cajan, of the phosphate fertilizers and of the liming on amilolytic, cellulolytic, proteolytic and ureolytic bacteria and fungi were investigated. The proportion of bacteria with enzymatic activity in relation to the total varied from 25 to 87% and fungi from 2 to 36%. The groups of bacteria increased its population in plots added with superphosphate and lime in relation to the other treatments (except the ureolytic that increased in plots not fertilized) and the fungi enhanced in the unfertilized (except the ureolytics that increased with superphosphate) and limed plots. The highest counts of ureolytic bacteria and proteolytic fungi were found in the soil cultivated with B. ruziziensis. The CM-cellulolytic (CM, cellulose microcrystalline) and ureolytic fungi enhanced in the uncultivated plots and the amilolytic and CMC-cellulolytic (CMC, carboxymethylcellulose) in the plots cultivated with C. cajan. The other groups of bacteria were not influenced by the cultivation system. The population and the enzymatic ability of the fungi groups were smaller than the bacteria, suggesting a smaller participation in the nutrients cycling in the soil. The bacteria presented multiple enzymatic activities, showing larger versatility than the fungi.

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Growth, nitrogen accumulation, and symbiotic dinitrogen fixation in pure and mixed plantings of hybrid poplar and black alder

Côté¹,

Camiré²

1984

Frankia Symbioses

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Nitrogen mineralisation and the activity and populations of microflora in a high producing yellow-brown loam under pasture

Cited by 13 publications

References 15 publications

Comparative Analyses of Glyphosate Alternative Weed Management Strategies on Plant Coverage, Soil and Soil Biota

Comparative Analyses of Glyphosate Alternative Weed Management Strategies on Plant Coverage, Soil and Soil Biota

Microrganismos produtores de hidrolases envolvidos nas transformações dos compostos do carbono e do nitrogênio do solo

Growth, nitrogen accumulation, and symbiotic dinitrogen fixation in pure and mixed plantings of hybrid poplar and black alder

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