Abstract
Abstract The aim of the present experiments was to determine how fast maize and rape plants respond to drying and subsequent rewetting of the topsoil by changing their rooting patterns in different soil depths. Plants were grown in a glasshouse in large (120 × 10.5 × 5 cm) containers which allowed continuous observation of root growth and control of soil water contents at all depths. In both species, drying of the topsoil resulted in a rapid (after 6 d) decrease of root growth in the topsoil (0–40 cm) and an increase in the subsoil (80–120 cm). Increase of root growth in the subsoil preceded the decrease hi the topsoil. Drying of the topsoil decreased shoot P concentrations in both species, whereas the concentrations of N, K and Ca were not significantly affected despite enriched fertilizer levels in the topsoil. In both species, after rewetting, root growth in the topsoil rapidly recovered, and after 5 d exceeded that of the continuously irrigated plants. This increase of root growth an the topsoil occurred at the expense of root growth in the subsoil. The results demonstrate that maize and rape plants may rapidly respond to drying and rewetting the topsoil by locally increasing root growth in soil layers with the most favourable conditions. This plasticity in root growth is a factor which contributes to the maintenance of an adequate nutritional status.
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Claims 12
Claim · model-written summary
maize topsoil drying caused decrease in root growth in the topsoil.
- Treatment
- drying of the topsoile0
- Outcome
- root growth in the topsoile0
- Direction
- decreasee0
- Qualifier
- topsoil (0–40 cm)e0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both species, drying of the topsoil resulted in a rapid (after 6 d) decrease of root growth in the topsoil (0–40 cm) and an increase in the subsoil (80–120 cm).”
t0“maize”
Claim · model-written summary
maize topsoil drying caused increase in increase in the subsoil.
- Treatment
- drying of the topsoile0
- Outcome
- increase in the subsoile0
- Direction
- increasee0
- Qualifier
- subsoil (80–120 cm)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both species, drying of the topsoil resulted in a rapid (after 6 d) decrease of root growth in the topsoil (0–40 cm) and an increase in the subsoil (80–120 cm).”
t0“maize”
Claim · model-written summary
rape topsoil drying caused decrease in root growth in the topsoil.
- Taxon
- rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- drying of the topsoile0
- Outcome
- root growth in the topsoile0
- Direction
- decreasee0
- Qualifier
- topsoil (0–40 cm)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“In both species, drying of the topsoil resulted in a rapid (after 6 d) decrease of root growth in the topsoil (0–40 cm) and an increase in the subsoil (80–120 cm).”
t0“rape”
Claim · model-written summary
rape topsoil drying caused increase in increase in the subsoil.
- Taxon
- rapeBrassica napust0
- Treatment
- drying of the topsoile0
- Outcome
- increase in the subsoile0
- Direction
- increasee0
- Qualifier
- subsoil (80–120 cm)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both species, drying of the topsoil resulted in a rapid (after 6 d) decrease of root growth in the topsoil (0–40 cm) and an increase in the subsoil (80–120 cm).”
t0“rape”
Claim · model-written summary
maize shoot P concentration decreased.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drying of the topsoil decreased shoot P concentrations in both species, whereas the concentrations of N, K and Ca were not significantly affected despite enriched fertilizer levels in the topsoil.”
t0“maize”
Claim · model-written summary
maize shoot N, K and Ca concentrations were not significantly affected.
- Treatment
- Drying of the topsoile0
- Outcome
- concentrations of N, K and Cae0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drying of the topsoil decreased shoot P concentrations in both species, whereas the concentrations of N, K and Ca were not significantly affected despite enriched fertilizer levels in the topsoil.”
t0“maize”
Claim · model-written summary
rape shoot P concentration decreased.
- Taxon
- rapeBrassica napust0
- Treatment
- Drying of the topsoile0
- Outcome
- shoot P concentrationse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drying of the topsoil decreased shoot P concentrations in both species, whereas the concentrations of N, K and Ca were not significantly affected despite enriched fertilizer levels in the topsoil.”
t0“rape”
Claim · model-written summary
rape shoot N, K and Ca concentrations were not significantly affected.
- Taxon
- rapeBrassica napust0
- Treatment
- Drying of the topsoile0
- Outcome
- concentrations of N, K and Cae0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drying of the topsoil decreased shoot P concentrations in both species, whereas the concentrations of N, K and Ca were not significantly affected despite enriched fertilizer levels in the topsoil.”
t0“rape”
Claim · model-written summary
maize root growth recovered and exceeded continuously irrigated plants after five days.
- Treatment
- rewettinge0
- Outcome
- root growth in the topsoile0
- Direction
- exceedede0
- Qualifier
- after 5 de0
- Comparator
- continuously irrigated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both species, after rewetting, root growth in the topsoil rapidly recovered, and after 5 d exceeded that of the continuously irrigated plants.”
t0“maize”
Claim · model-written summary
rape root growth recovered and exceeded continuously irrigated plants after five days.
- Taxon
- rapeBrassica napust0
- Treatment
- rewettinge0
- Outcome
- root growth in the topsoile0
- Direction
- exceedede0
- Qualifier
- after 5 de0
- Comparator
- continuously irrigated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both species, after rewetting, root growth in the topsoil rapidly recovered, and after 5 d exceeded that of the continuously irrigated plants.”
t0“rape”
Claim · model-written summary
maize subsoil root growth decreased as topsoil root growth increased.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This increase of root growth an the topsoil occurred at the expense of root growth in the subsoil.”
t0“maize”
Claim · model-written summary
rape subsoil root growth decreased as topsoil root growth increased.
- Taxon
- rapeBrassica napust0
- Organ / stage
- topsoile0
- Outcome
- root growth in the subsoile0
- Direction
- at the expense ofe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This increase of root growth an the topsoil occurred at the expense of root growth in the subsoil.”
t0“rape”
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See all 73 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.