Abstract
No-tillage often affects crop root development due to the higher mechanical impedance to root elongation, resulting in yield reduction under an unfavorable rainfall pattern, such as drought. In this study, we analyzed the changes in water source of wheat and soybean under drought stress in a continuous no-tillage field. Deuterium-labeled irrigation water was applied at different growth stages of crops to analyze their water uptake pattern. Mechanical impedance of the surface soil was 3.5 and 4.4 times higher in the no-tillage than in the conventional tillage under wet and drought conditions, respectively. Root length density and root branching index (the length of lateral roots per unit axile root length) of soybean in the surface soil layer were higher in the no-tillage field. This indicates that the increased branching by the higher mechanical impedance of undisturbed surface soil causes roots to accumulate in the surface soil layer. The deuterium concentration in the xylem sap of both crops was significantly higher in the no-tillage than in the tillage under a drought condition. This indicates that the crops in the no-tillage field depend highly on the newly supplied easily accessible water (irrigation water and/or rainfall) as compared with those in the conventional tillage field under a limited water supply. In conclusion, enhanced surface root growth in the no-tillage condition would result in higher dependence on surface supplied irrigation water than in the conventional tillage under drought.
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Claims 6
Claim · model-written summary
Surface-soil mechanical impedance under no-tillage was 3.5 times higher than conventional tillage when wet.
- Treatment
- no-tillagee0
- Outcome
- Mechanical impedance of the surface soile0
- Direction
- highere0
- Value
- 3.5e0
- Qualifier
- wete0
- Comparator
- conventional tillagee0
Not reportedTaxon
Verbatim
e0“Mechanical impedance of the surface soil was 3.5 and 4.4 times higher in the no-tillage than in the conventional tillage under wet and drought conditions, respectively”
Claim · model-written summary
Surface-soil mechanical impedance under no-tillage was 4.4 times higher than conventional tillage during drought.
- Treatment
- no-tillagee0
- Outcome
- Mechanical impedance of the surface soile0
- Direction
- highere0
- Value
- 4.4e0
- Qualifier
- drought conditionse0
- Comparator
- conventional tillagee0
Not reportedTaxon
Verbatim
e0“Mechanical impedance of the surface soil was 3.5 and 4.4 times higher in the no-tillage than in the conventional tillage under wet and drought conditions, respectively”
Claim · model-written summary
Soybean surface root length density and branching index were higher under no-tillage.
- Taxon
- soybean
Glycine maxe0 - Organ / stage
- rootse0
- Treatment
- no-tillage fielde0
- Outcome
- Root length density and root branching indexe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root length density and root branching index (the length of lateral roots per unit axile root length) of soybean in the surface soil layer were higher in the no-tillage field”
Claim · model-written summary
Wheat xylem sap deuterium concentration was significantly higher under no-tillage than tillage during drought.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- no-tillagee0
- Outcome
- deuterium concentration in the xylem sape0
- Direction
- highere0
- Qualifier
- drought conditione0
- Comparator
- tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deuterium concentration in the xylem sap of both crops was significantly higher in the no-tillage than in the tillage under a drought condition”
t0“Wheat and Soybean”
Claim · model-written summary
Soybean xylem sap deuterium concentration was significantly higher under no-tillage than tillage during drought.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- no-tillagee0
- Outcome
- deuterium concentration in the xylem sape0
- Direction
- highere0
- Qualifier
- drought conditione0
- Comparator
- tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deuterium concentration in the xylem sap of both crops was significantly higher in the no-tillage than in the tillage under a drought condition”
t0“Wheat and Soybean”
Claim · model-written summary
Wheat and soybean under no-tillage depended more on newly supplied surface water during limited water supply.
- Taxon
- Wheat and SoybeanGlycine maxTriticum aestivumt0
- Treatment
- no-tillage fielde0
- Outcome
- depend highly on the newly supplied easily accessible watere0
- Qualifier
- under a limited water supplye0
- Comparator
- conventional tillage fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the crops in the no-tillage field depend highly on the newly supplied easily accessible water (irrigation water and/or rainfall) as compared with those in the conventional tillage field under a limited water supply”
t0“Wheat and Soybean”
The same questions in other papers
tillage · growth · Glycine max (soybean)Results differ
51 papers in the same direction as this paper · 28 in the opposite direction · 4 reporting no difference from an alternative
- negative
- negative
- negative
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See all 84 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.