Abstract
Summary: Non‐competitive effects between lamb's quarters (Chenopodium album L.) and maize (INRA 25H ) Maize is extremely sensitive to competition from weeds, lamb's quarters ( C.alhum ) often being particularly competitive, Under controlled conditions in a growth chamber short term bioassay methods techniques have shown that lamb's quarters exerted inhibiting influences on maize growth which were not attributable to competition alone. These non‐compctitive, specific influences became apparent mainly from the early flowering stage of lamb's quarters both in soil and in nutrient solution. With an identical concentration of lamb's quarters roots, the growth‐inhibiting effects are more marked when the soil structure is modified than when it is not, similarly when the aqueous extract is obtained by placing soils in suspension, the inhibiting effects are more marked than when it is obtained by percolation. Finally, water leached from the leaves, roots or seeds of lamb's quaners shows inhibiting effects proport ional to the concentration on root growth of maize. The presence of phytotoxins in the culture media of lamb's quarters is discussed.
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Claims 5
Claim · model-written summary
Lamb's quarters exerted inhibiting influences on maize growth in a growth chamber that were not attributable to competition alone.
- Treatment
- lamb's quarterse0
- Interactor
- lamb's quarters
Chenopodium albume0weed - Outcome
- maize growthe0
- Direction
- inhibitinge0
- Setting
- growth chambere1
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lamb's quarters exerted inhibiting influences on maize growth which were not attributable to competition alone”
e1“Under controlled conditions in a growth chamber”
Claim · model-written summary
The non-competitive influences of lamb's quarters became apparent mainly from its early flowering stage, both in soil and in nutrient solution.
- Taxon
- lamb's quartersChenopodium albume0
- Organ / stage
- early flowering stagee0
- Outcome
- became apparent mainly from the early flowering stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“became apparent mainly from the early flowering stage of lamb's quarters both in soil and in nutrient solution”
Claim · model-written summary
At an identical concentration of lamb's quarters roots, growth-inhibiting effects were more marked when soil structure was modified than when it was not.
- Taxon
- lamb's quartersChenopodium albume0
- Organ / stage
- rootse0
- Treatment
- soil structure is modifiede0
- Outcome
- growth‐inhibiting effectse0
- Direction
- more markede0
- Comparator
- when it is note0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With an identical concentration of lamb's quarters roots, the growth‐inhibiting effects are more marked when the soil structure is modified than when it is not”
Claim · model-written summary
Inhibiting effects were more marked when the aqueous extract was obtained by placing soils in suspension than by percolation.
- Treatment
- aqueous extract is obtained by placing soils in suspensione0
- Outcome
- inhibiting effectse0
- Direction
- more markede0
- Comparator
- percolatione0
Not reportedTaxon
Verbatim
e0“similarly when the aqueous extract is obtained by placing soils in suspension, the inhibiting effects are more marked than when it is obtained by percolation”
Claim · model-written summary
Water leached from leaves, roots or seeds of lamb's quarters showed inhibiting effects on maize root growth proportional to the concentration.
- Treatment
- water leached from the leaves, roots or seeds of lamb's quanerse0
- Outcome
- root growth of maizee0
- Direction
- inhibitinge0
- Qualifier
- proport ional to the concentratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water leached from the leaves, roots or seeds of lamb's quaners shows inhibiting effects proport ional to the concentration on root growth of maize”
The same questions in other papers
Chenopodium album · growth · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
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.