Rye residues contribute weed suppression in no-tillage cropping systems

Barnes, Jane P.; Putnam, A. R.

doi:10.1007/bf00982210

Cited by 233 publications

(167 citation statements)

References 16 publications

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“…Rye has long been reputed to produce allelopathic compounds [86,87]. The phytotoxic allelopathic effects produced by rye residues are thought to be primarily due to benzoxazizone compounds.…”

Section: Cover Crop Impacts On Weed Populationsmentioning

confidence: 99%

Impacts of Organic Zero Tillage Systems on Crops, Weeds, and Soil Quality

2013

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Abstract:Organic farming has been identified as promoting soil quality even though tillage is used for weed suppression. Adopting zero tillage and other conservation tillage practices can enhance soil quality in cropping systems where synthetic agri-chemicals are relied on for crop nutrition and weed control. Attempts have been made to eliminate tillage completely when growing several field crops organically. Vegetative mulch produced by killed cover crops in organic zero tillage systems can suppress annual weeds, but large amounts are needed for adequate early season weed control. Established perennial weeds are not controlled by cover crop mulch. Integrated weed management strategies that include other cultural as well as biological and mechanical controls have potential and need to be incorporated into organic zero tillage research efforts. Market crop performance in organic zero tillage systems has been mixed because of weed, nutrient cycling, and other problems that still must be solved. Soil quality benefits have been demonstrated in comparisons between organic conservation tillage and inversion tillage systems, but studies that include zero tillage treatments are lacking. Research is needed which identifies agronomic strategies for optimum market crop performance, acceptable levels of weed suppression, and soil quality benefits following adoption of organic zero tillage. OPEN ACCESSSustainability 2013, 5 3173

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Section: Cover Crop Impacts On Weed Populationsmentioning

confidence: 99%

Impacts of Organic Zero Tillage Systems on Crops, Weeds, and Soil Quality

2013

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“…Alfalfa residues incorporated in silica sand inhibited shoot and root growth of A. retroflexus in pot experiments (Chung and Miller 1995). Desiccated rye residues in soybean and sunflower crops planted without tillage, resulted in over 90% reduction in the biomass of A. retroflexus and of other weeds (Barnes and Putnam 1983). Rapeseed (Brassica napus L.) foliage incorporated into a loamy sand suppressed emergence and growth of A. retroflexus and other weeds as much as a standard herbicide treatment.…”

Section: Response To Other Human Manipulationsmentioning

confidence: 99%

The biology of Canadian weeds. 130. Amaranthus retroflexus L., A. powellii S. Watson and A. hybridus L.

Costea¹,

Weaver²,

Tardif³

2004

Can. J. Plant Sci.

153

108

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The three species are noxious weeds introduced to Canada from southern North America. Their geographical distribution has remained almost unchanged since the original paper published in 1980. The plants exhibit a high phenotypic plasticity and genetic variability and they easily adapt to a multitude of agrestal and ruderal habitats. The seeds contribute to a persistent seed bank; they exhibit a variable dormancy and polymorph germination as a result of maternal, genetic and environmental factors. Growth is rapid and plants produce a large number of viable seeds. The three species have developed multiple resistance to triazine and acetolactate-synthase-inhibiting herbicides. They are alternate hosts to many insects, nematodes, viruses, bacteria and fungi that affect cultivated plants.

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“…The mulch has physical (interference on germination and seedling survival rate), chemical (allelopathic effect) and biological (installation of a dense and diverse microbiocenose in the topsoil) effects on weeds [75,76]. Thus, of the numerous known advantages of no-tillage -a practice that keeps the soil covered by crop residues -stands out the improvement in weed control.…”

Section: Cultural Controlmentioning

confidence: 99%