Abstract
B ezuidenhout SR, R einhardt CF & W hitwell MI (2012). Cover crops of oats, stooling rye and three annual ryegrass cultivars influence maize and Cyperus esculentus growth. Weed Research 52 , 153–160. Summary No information is available on the effect of cover crops on weed growth in maize production in KwaZulu‐Natal, South Africa. In a field experiment, the influence of two preceding cover crops, stooling rye and annual ryegrass, on the growth of maize and the weed Cyperus esculentus were compared with herbicides and weed control by hoeing. Maize emergence and early growth were delayed in the presence of physical residues of both cover crop species, especially annual ryegrass. Growth of C. esculentus was significantly inhibited in the inter‐row maize planting lines by the cover crops for the first 16 days after maize emergence, but this effect had diminished by day 28. In a pot experiment, the influence of the same two cover crops on maize and C. esculentus growth was evaluated together with oats and two additional annual ryegrass cultivars. Here, the growth of maize and C. esculentus were suppressed, especially by the root residues of the annual ryegrass, in particular the cultivar Midmar. Chemical analysis of the leachate of the root residues indicated the presence of phenolic acids and benzoxazolin‐2(3 H )‐one. To achieve effective weed control, a weed management strategy combining the mulch retained on the soil surface, with a possible reduction in the type and amount of herbicide, should be implemented.
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Claims 6
Claim · model-written summary
Maize emergence and early growth were delayed by physical residues of stooling rye and annual ryegrass cover crops, especially annual ryegrass.
- Treatment
- physical residues of both cover crop speciese0
- Outcome
- Maize emergence and early growthe0
- Direction
- delayede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize and Cyperus esculentus growth”
e0“Maize emergence and early growth were delayed in the presence of physical residues of both cover crop species”
Claim · model-written summary
In the field, cover crops significantly inhibited growth of C. esculentus in the inter-row maize planting lines for the first 16 days after maize emergence, but the effect had diminished by day 28.
- Taxon
- C. esculentus
Cyperus esculentuse0 - Treatment
- the cover cropse1
- Interactor
- C. esculentusCyperus esculentuse0weed
- Outcome
- Growth of C. esculentuse0
- Direction
- inhibitede0
- Qualifier
- for the first 16 days after maize emergencee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of C. esculentus was significantly inhibited”
e1“by the cover crops for the first 16 days after maize emergence”
Claim · model-written summary
In the pot experiment, maize growth was suppressed, especially by root residues of annual ryegrass, in particular cultivar Midmar.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize and Cyperus esculentus growth”
e0“the growth of maize and C. esculentus were suppressed, especially by the root residues of the annual ryegrass, in particular the cultivar Midmar”
Claim · model-written summary
In the pot experiment, C. esculentus growth was suppressed, especially by root residues of annual ryegrass, in particular cultivar Midmar.
- Taxon
- C. esculentusCyperus esculentuse0
- Material
- Midmare0
- Treatment
- root residues of the annual ryegrasse0
- Interactor
- C. esculentusCyperus esculentuse0weed
- Outcome
- growthe0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth of maize and C. esculentus were suppressed, especially by the root residues of the annual ryegrass, in particular the cultivar Midmar”
Claim · model-written summary
Chemical analysis of the leachate of root residues indicated the presence of phenolic acids and benzoxazolin-2(3H)-one.
- Outcome
- presence of phenolic acidse0
Not reportedTaxon
Verbatim
e0“Chemical analysis of the leachate of the root residues indicated the presence of phenolic acids”
Claim · model-written summary
A weed management strategy combining mulch retained on the soil surface with a possible reduction in type and amount of herbicide should be implemented.
- Outcome
- weed management strategye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize and Cyperus esculentus growth”
e0“a weed management strategy combining the mulch retained on the soil surface, with a possible reduction in the type and amount of herbicide, should be implemented”
The same questions in other papers
cover crop · growth · Zea mays (maize)Results differ
11 papers in the same direction as this paper · 16 in the opposite direction
- no effect
- positive
- positive
24 papers more in this group
See all 28 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.