Infestations of yellow nutsedge in cropped soil: Effects on soil nitrogen availability to the crop and on associated N transforming bacterial populations

Volz, Michael

doi:10.1016/0304-3746(76)90134-7

Cited by 7 publications

(6 citation statements)

References 18 publications

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“…When nutsedges were grown in association with crops, both purple and yellow nutsedge reduced the nutrient content of some crops (28,76,86). Purple nutsedge reduced the N and K content of cotton shoots and accumulated twice the amount of these elements as cotton without a marked effect on P (28).…”

Section: (59)mentioning

confidence: 99%

Interference and Interaction of Purple and Yellow Nutsedges (Cyperus rotundusandC. esculentus) with Crops

Keeley¹

1987

Weed technol.

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Section: (59)mentioning

confidence: 99%

Interference and Interaction of Purple and Yellow Nutsedges (Cyperus rotundusandC. esculentus) with Crops

Keeley¹

1987

Weed technol.

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“…Segundo Volz (1977), as raízes de plantas do gênero Cyperus podem aumentar a atividade de bactérias desnitrificadoras, com conseqüente diminuição da disponibilidade de N. Patterson (1985) observou que Cyperus esculentus consorciado com milho para silagem reduz os teores de matéria seca e de nitrogênio total do milho. Verificou ainda que, do total de N reduzido da cultura, apenas 38% foi aproveitado pela planta daninha.…”

Section: Introductionunclassified

Ação do imazapic+imazapyr sobre a tiririca (Cyperus rotundus) e os desnitrificadores em milho

et al. 2004

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Os objetivos do experimento foram avaliar a eficácia do imazapic+imazapyr sobre a tiririca e a influência desta planta daninha sobre a população de desnitrificadores em solo cultivado com milho. O experimento foi realizado em caixas de 0,70 x 0,30 x 0,30 m, onde foram semeados o milho tolerante às imidazolinonas (C-901CL) e plantados 50 bulbos de tiririca. O delineamento experimental foi o inteiramente casualizado, com seis repetições. Os tratamentos foram constituídos por: 1. milho sem tiririca; 2. milho com tiririca; 3. milho com tiririca capinada; 4. milho com tiririca e imazapic+imazapyr (63+21g ha-1 de i.a.) em pós-emergência; e 5. milho com tiririca e imazapic+imazapyr (63+21g ha-1 de i.a.) em pré-emergência. O herbicida foi eficiente em pós-emergência, diminuindo as manifestações epígeas da tiririca em 41% e proporcionando controle visual de 88% aos 21 dias após a aplicação. Os desnitrificadores do solo aumentaram em seis e dez vezes aos 24 e 54 dias após a semeadura do milho, respectivamente, com a presença de tiririca. A aplicação do herbicida em pós-emergência reduziu a população de desnitrificadores para 1,91x10(5) NMP (número mais provável), 89% menor que a testemunha capinada (16,78x10(5) NMP).

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“…Purple nutsedge, however, is generally more susceptible than yellow nutsedge to growth reductions associated with canopy closure and low light environments (Santos et al 1997). Yellow and purple nutsedge also compete with crops by removing potassium and nitrogen from the soil (Horowitz 1973;Keeley 1987;Volz 1977). Nutsedge roots can also play a role in stimulating the denitrification of NO 3 to N 2 reducing nitrogen availability (Volz 1977).…”

mentioning

confidence: 99%

“…Yellow and purple nutsedge also compete with crops by removing potassium and nitrogen from the soil (Horowitz 1973;Keeley 1987;Volz 1977). Nutsedge roots can also play a role in stimulating the denitrification of NO 3 to N 2 reducing nitrogen availability (Volz 1977). There are also reports of potential allelopathic compounds produced by yellow and purple nutsedge (Drost and Doll 1980;Friedman and Horowitz 1971;Keeley 1987).…”

mentioning

confidence: 99%

Mesotrione Combinations with Atrazine and Bentazon for Yellow and Purple Nutsedge (Cyperus EsculentusandC. Rotundus) Control in Corn

et al. 2008

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Field and greenhouse studies were conducted to evaluate mesotrione alone and in combinations with low rates of atrazine and bentazon for control of yellow and purple nutsedge. Mesotrione alone at rates of 105 to 210 g ai/ha controlled yellow nutsedge 43 to 70%. Mixtures of mesotrione with atrazine at 280 g ai/ha did not always improve yellow nutsedge control over that by mesotrione alone, but increasing atrazine to 560 g ai/ha in these mixtures generally provided more consistent control of yellow nutsedge. Mesotrione at 105 g ai/ha mixed with bentazon at 280 or 560 g ai/ha controlled yellow nutsedge 88% or greater which was similar to control from the standard halosulfuron at 36 g ai/ha. Mesotrione, atrazine, and bentazon alone did not control purple nutsedge. Mixtures of mesotrione plus bentazon, however, did improve control of purple nutsedge over either herbicide applied alone, but this control was not considered commercially acceptable.

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Infestations of yellow nutsedge in cropped soil: Effects on soil nitrogen availability to the crop and on associated N transforming bacterial populations

Cited by 7 publications

References 18 publications

Interference and Interaction of Purple and Yellow Nutsedges (Cyperus rotundusandC. esculentus) with Crops

Interference and Interaction of Purple and Yellow Nutsedges (Cyperus rotundusandC. esculentus) with Crops

Ação do imazapic+imazapyr sobre a tiririca (Cyperus rotundus) e os desnitrificadores em milho

Mesotrione Combinations with Atrazine and Bentazon for Yellow and Purple Nutsedge (Cyperus EsculentusandC. Rotundus) Control in Corn

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