Effect of Crop-Residue Decomposition Products on Plant Roots

Patrick, Z. A.; Toussoun, and T A; Koch, L. W.

doi:10.1146/annurev.py.02.090164.001411

Cited by 110 publications

(66 citation statements)

References 42 publications

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“…This may reflect the antimicrobial nature of residue-derived chemicals, but it may also indicate that residues provided an additional resource for soil microorganisms (Blum et al 1993), resulting in a lower initial attack rate on emerging seedlings. Several workers have proposed that allelochemicalinduced damage to seedlings can stimulate microbial attack (Chandler and Daniell 1974;Patrick et al 1964;Toussoun and Patrick 1963), and Mohler and colleagues (Mohler et al 2012) interpreted lower weed emergence in their live soil versus sterilized soil treatments to be the a signature of pathogenic weed suppression. In contrast to this previous work and in contrast to our hypothesis of synergistic pathogen activity, our results provide no evidence of pathogen stimulation by residues or residuederived chemicals.…”

Section: Microbial Interactions With Water-soluble Allelochemialsmentioning

confidence: 99%

“…Pathogenic infection of weeds can reduce weed germination rates and retard the growth of seedlings (Davis and Renner 2007). Cover crop residues may enhance soil pathogen growth (Conklin et al 2002;Mohler et al 2012) and potentially encourage pathogens to attack damaged weed seedlings (Chandler and Daniell 1974;Patrick et al 1964). Mohler and colleagues recently showed that unsterilized Blive^soil (i.e., with a natural microbial community) reduces seedling germination rates when cover crop residues are incorporated, and the combined effect of residues and live microorganisms is greater than the effect of either of these components alone (Mohler et al 2012).…”

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confidence: 99%

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Interactions between allelochemicals and the microbial community affect weed suppression following cover crop residue incorporation into soil

Lou

Davis²,

Yannarell

2015

Plant Soil

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Background and aims The objective of this study is to understand how soil microorganisms interact with cover crop-derived allelochemicals to suppress weed germination and growth following cover crop residue incorporation. Methods We conducted a time series experiment crossing sterilized and non-sterilized soil with four different residue treatments. We measured weed seed germination rates, radicle elongation, and disease incidence in seed germination bioassays. We also monitored cover crop-derived, isoflavone allelochemicals in these bioassays. We partitioned the total weed suppression into three sources: microbe-only inhibition, residue-only inhibition, and the microbe-residue interaction. Results Microbial activity suppressed weed germination and growth for 30 days, while cover crop-derived allelochemicals provided suppression for a limited time. There was an antagonistic interaction between microbes and allelochemicals. This interaction was strongest for water-soluble allelochemicals, while residue fractions containing intact plant tissues retained greater suppressiveness even in the presence of a live microbial community. Conclusions Microbial activity can directly suppress weed germination and growth, but microorganisms also indirectly help weeds by degrading cover crop-derived allelochemicals. As a result of these interactions, cover crop-derived weed suppression in agricultural soils shifts from an early allelochemical-dominated phase to a later phase where microbial suppression is more important.

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Section: Microbial Interactions With Water-soluble Allelochemialsmentioning

confidence: 99%

mentioning

confidence: 99%

Interactions between allelochemicals and the microbial community affect weed suppression following cover crop residue incorporation into soil

Lou

Davis²,

Yannarell

2015

Plant Soil

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“…A wide range of soluble organic compounds, some from the anaerobic decomposition of cellulose and lignin, has been reported to be toxic to plants (Patrick et al, 1964). Barko and Smart (1983) found that aquatic sediments receiving refractory organic matter retained growth inhibiting properties for longer than those receiving labile organic matter.…”

Section: Visual Observationsmentioning

confidence: 99%

Nutrient removal by floating aquatic macrophytes cultured in anaerobically digested flushed dairy manure wastewater

Sooknah

Wilkie

2004

Ecological Engineering

299

116

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“…Compostos químicos resultantes da decomposição de resíduos vegetais sobre a superfície ou misturados na camada arável do solo têm sido registrados por vários pesquisadores (McCalla & Haskins, 1964;Patrick et al, 1964;Patrick & Tousson, 1965;Patrick, 1971;McCalla & Norstadt, 1974;Rice, 1984), que citam como sintomas a redução das plântulas, o encurtamento de entrenós, os caules delgados e contorcidos e o estande desigual e reduzido em condição de campo, especialmente nas áreas onde existe maior quantidade de resíduos vegetais. Ramos & Valente (1997) demonstraram, em laboratório, a interferência alelopática de B. decumbens na germinação de sementes de milho e soja.…”

Section: Introductionunclassified

Influência do manejo da palhada de capim-braquiária (Brachiaria decumbens) sobre o desenvolvimento inicial de soja (Glycine max) e amendoim-bravo (Euphorbia heterophylla)

et al. 2003

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RESUMO -Com o objetivo de avaliar os efeitos de diferentes manejos de palhada de capimbraquiária sobre o desenvolvimento inicial da cultura de soja e da planta daninha amendoim-bravo, foi conduzido um experimento em condições de casa de vegetação no NuPAM-FCA/UNESP, Botucatu-SP. Os tratamentos utilizados foram: manejo da palhada na superfície do solo + irrigação superficial (T1); manejo da palhada na superfície do solo + irrigação subsuperficial (T2); palhada incorporada ao solo (T3); e testemunha sem cobertura (T4). A palhada foi colhida no campo 30 dias após dessecação com o herbicida glyphosate (1,44 g i.a. ha -1 ). O delineamento experimental utilizado foi o inteiramente casualizado, com sete repetições, sendo as unidades experimentais vasos plásticos, com a soja e o amendoimbravo semeados paralelamente, em linhas distintas. O T1 reduziu significativamente o índice de velocidade de germinação (IVG) e a altura das plântulas de soja aos 5 e 10 dias após a emergência (DAE), ao contrário do amendoim-bravo, o qual não sofreu interferência dos tratamentos estudados, constituindo-se em uma planta-problema para sistemas produtivos com palhada de capim-braquiária. Os resultados da análise de crescimento (TCA -taxa de crescimento absoluto, TCR -taxa de crescimento relativo e TAL -taxa de assimilação líquida) das plântulas de soja e amendoim-bravo apresentaram valores máximos aos 15 DAE, com exceção do T3 para soja, o qual reduziu expressivamente o desenvolvimento em relação aos demais tratamentos.Palavras-chave: palhada, plantio direto, planta daninha. ABSTRACT -An experiment was carried out under greenhouse conditions at NuPAM-FCA/UNESP, Botucatu, SP, Brazil to evaluate the effects of different types of straw management of Brachiaria decumbens on the initial development of Glycine max and Euphorbia heterophylla. The treatments were: straw on soil surface + irrigation on the top (T1); straw on soil surface + underirrigation (T2); straw incorporated into the soil (T3) and control (T4

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Effect of Crop-Residue Decomposition Products on Plant Roots

Cited by 110 publications

References 42 publications

Interactions between allelochemicals and the microbial community affect weed suppression following cover crop residue incorporation into soil

Interactions between allelochemicals and the microbial community affect weed suppression following cover crop residue incorporation into soil

Nutrient removal by floating aquatic macrophytes cultured in anaerobically digested flushed dairy manure wastewater

Influência do manejo da palhada de capim-braquiária (Brachiaria decumbens) sobre o desenvolvimento inicial de soja (Glycine max) e amendoim-bravo (Euphorbia heterophylla)

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