Identification and phytotoxic activity of compounds produced during decomposition of corn and rye residues in soil

Chou, Chang‐Hung; Patrick, Z. A.

doi:10.1007/bf00988283

Cited by 186 publications

(75 citation statements)

References 14 publications

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“…Baličevićet al, (2015) studied the allelopathic effect of basil (Ocimumbasilicum] on germination and early growth of weeds under laboratory conditions and found that basil reduced germination of hoary cress from 13.8 to 27%. These effects of basil powder were possibly due to the release of allelochemicals after decaying (Chou and Patrick, 1976). …”

Section: Discussionmentioning

confidence: 99%

Allelopathic Effects of Sweet Basil (Ocimumbasilicum L.) on Seed Germination and Seedling Growth of some Poaceous Crops

Dafaallah¹,

Ahmed²

2017

IJEAB

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Section: Discussionmentioning

confidence: 99%

Allelopathic Effects of Sweet Basil (Ocimumbasilicum L.) on Seed Germination and Seedling Growth of some Poaceous Crops

Dafaallah¹,

Ahmed²

2017

IJEAB

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“…Studies have suggested that inhibition of germination and seedling growth by small grain mulches may be due, in part, to allelopathic interactions (Chou and Patrick, 1976;Liebl and Worsham, 1983;Shilling et al, 1985Shilling et al, , 1986aBarnes et al, 1986). To actually establish the role of allelopathic interactions in such systems will require: (1) identification of inhibitors involved; (2) determination of the rates of uptake of inhibitors by seeds or roots; and (3) establishing that uptake was of a sufficient magnitude to bring about the observed levels of inhibition.…”

Section: Introductionmentioning

confidence: 96%

Phenolic acid content of soils from wheat-no till, wheat-conventional till, and fallow-conventional till soybean cropping systems

et al. 1991

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Soil core (0-2.5 and/or 0-10 cm) samples were taken from wheat no till, wheat-conventional till, and fallow-conventional till soybean cropping systems from July to October of 1989 and extracted with water in an autoclave. The soil extracts were analyzed for seven common phenolic acids (p-coumaric, vanillic,p-hydroxybenzoic, syringic, caffeic, ferulic, and sinapic; in order of importance) by high-performance liquid chromatography. The highest concentration observed was 4 μg/g soil forp-coumaric acid. Folin & Ciocalteu's phenol reagent was used to determine total phenolic acid content. Total phenolic acid content of 0- to 2.5-cm core samples was approximately 34% higher than that of the 0- to 10-cm core samples. Phenolic acid content of 0- to 2.5-cm core samples from wheat-no till systems was significantly higher than those from all other cropping systems. Individual phenolic acids and total phenolic acid content of soils were highly correlated. The last two observations were confirmed by principal component analysis. The concentrations were confirmed by principal component analysis, tions of individual phenolic acids extracted from soil samples were related to soil pH, water content of soil samples, total soil carbon, and total soil nitrogen. Indirect evidence suggested that phenolic acids recovered by the water-autoclave procedure used came primarily from bound forms in the soil samples.

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“…Os sintomas observados nas plantas de soja estão, provavelmente, relacionados com a quantidade de cobertura vegetal depositada sobre o solo, que impõe ao sistema ações físicas, químicas e biológicas, como, por exemplo, a alteração na dinâmica do carbono e do nitrogênio no solo, como também podem estar relacionados com a ação fitotóxica do herbicida utilizado na dessecação da cobertura vegetal. Além disso, a decomposição da cobertura vegetal resulta na produção e/ou liberação de compostos quí-micos que alteram o crescimento de plantas daninhas (Barnes & Putnam, 1983), bem como podem prejudicar a cultura (Chou & Patrick, 1976). Nunes et al (2009), para avaliar períodos de manejo químico de U. decumbens antecedendo o plantio direto da soja, verificaram que 8,6 t ha -1 de cobertura em vegetação nativa, após o manejo químico, representou uma camada de 15 cm de espessura sobre o solo.…”

Section: Introductionunclassified

Períodos de dessecação de Urochloa ruziziensis e seu reflexo na produtividade da soja RR

Nepomuceno¹,

Varela

Alves

et al. 2012

Planta daninha

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RESUMO -Com o objetivo de avaliar os efeitos de períodos de dessecação de Urochloa ruziziensis na implantação e na produtividade da soja transgênica no sistema de plantio direto, foram conduzidos dois experimentos em campo, nos municípios de Colina-SP, no ano agrícola de 2007/08, e Jaboticabal-SP, em 2009/10. Em Colina, utilizou-se uma área de pastagem de U. ruziziensis, conduzida há sete anos. Nesse local foram testados quatro períodos de dessecação da cobertura vegetal: 30, 20, 10 e 0 dias antes da semeadura da soja. No experimento de Jaboticabal, a área utilizada tinha histórico de pastagem com U. ruziziensis, que no ano agrícola 2008/09 foi cultivada com milho. Após a colheita do milho ocorreu reinfestação natural de U. ruziziensis na área, correspondendo a mais de 80% de cobertura vegetal. Nesse experimento, os tratamentos corresponderam a seis períodos de dessecação: 25, 20, 16, 12, 7 e 0 dias após a aplicação. Nos dois experimentos utilizou-se 1,44 kg e.a. ha -1 do herbicida glyphosate e o cultivar de soja M-SOY 7908 RR. O delineamento experimental foi o de blocos ao acaso, com quatro repetições. Foram avaliados o estande da cultura aos 20 dias após a semeadura da soja e na pré-colheita, a altura de plantas, a altura de inserção da primeira vagem, o número de vagens por planta e o rendimento de grãos (produtividade estimada em kg ha). Os resultados foram submetidos à análise de variância (teste F), com as médias sendo comparadas pelo teste de Tukey a 5% de probabilidade. A dessecação de U. ruziziensis no mesmo dia da semeadura da soja reduziu a altura das plantas, o número de vagens por planta e a produtividade de grãos. O período recomendado para o manejo químico de U. ruziziensis com glyphosate está entre 10 e 20 dias antes da semeadura da soja. Pôde-se concluir que o período de dessecação de U. ruziziensis alterou a produtividade da cultura.Palavras-chave: Brachiaria ruziziensis, Glycine max, cobertura vegetal, alelopatia, glyphosate.ABSTRACT -Two field trials were carried out to evaluate the effects of burn-down timing of Urochloa ruziziensis on transgenic soybean establishment and yield under the no-tillage system. One experiment was conducted in Colina, SP -Brazil, in 2007 season, and the other in Jaboticabal, SPBrazil, 2009/2010 season. In 2007, the experiment was carried out in a 7-year-old grass pasture of U. ruziziensis, with four burn-down timings of vegetation cover being tested 30, 20, 10, and 0 days in advance to soybean sowing. In 2009/2010, the experiment was conducted in an old grass pasture of U. ruziziensis cropped with maize the summer before. After maize harvesting, a natural re-infestation of U. ruziziensis occurred, corresponding to more than 80% of the vegetation cover. In this experiment, treatments corresponded to six burn-down timings of vegetation cover 25, 20, 16, 7, and 0 days in advance to soybean sowing. In all experiments, 1.44 kg a.e. ha -1 of herbicide glyphosate was applied, and the soybean cultivar M-SOY 7908 RR was used. The experiments were arranged in a randomized ...

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Identification and phytotoxic activity of compounds produced during decomposition of corn and rye residues in soil

Cited by 186 publications

References 14 publications

Allelopathic Effects of Sweet Basil (Ocimumbasilicum L.) on Seed Germination and Seedling Growth of some Poaceous Crops

Allelopathic Effects of Sweet Basil (Ocimumbasilicum L.) on Seed Germination and Seedling Growth of some Poaceous Crops

Phenolic acid content of soils from wheat-no till, wheat-conventional till, and fallow-conventional till soybean cropping systems

Períodos de dessecação de Urochloa ruziziensis e seu reflexo na produtividade da soja RR

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