Claim · model-written summary
Low rainfall depressed dry matter production and leaf area in dry lysimeters.
- Taxon
- SPRING WHEAT
Triticum aestivumt0 - Treatment
- low rainfalle0
- Outcome
- dry matter production and leaf areae0
- Direction
- depressede0
- Setting
- dry lysimeterse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SPRING WHEAT”
e0“In the dry lysimeters, low rainfall between the shot blade and anthesis stages produced moisture stress; consequently, dry matter production and leaf area were depressed”
Title
EFFECTS OF FERTILIZER N AND SOIL MOISTURE ON GROWTH, N CONTENT, AND MOISTURE USE BY SPRING WHEAT
C. A. CAMPBELL; W. NICHOLAICHUK; H. R. DAVIDSON; et al. Canadian Journal of Soil Science 1977. doi:10.4141/cjss77-035
Other claims from this paper (19)
- Intervention effect Under irrigation, leaf area, dry matter and N content increased with fertilizer N.
- Observation Dry lysimeter plants lost significant N at rates above 61.5 kg/ha.
- Intervention effect After late rain, dry matter and N content increased with N by maturity.
- Intervention effect Wet treatment produced about twice the dry matter of dry treatment.
- Intervention effect ET increased with N in the wet treatment.
- Intervention effect ET was much higher under wet than dry conditions.
- Intervention effect Applied N did not affect ET in dry lysimeters.
- Observation Root weight rose exponentially up to the shot blade stage.
- Observation Root weight declined in upper soil between anthesis and maturity.
- Observation Root weight remained constant in deeper segments.
- Intervention effect Root weight increased curvilinearly with N under irrigation.
- Intervention effect N above 41 kg/ha depressed dryland root growth.
- Observation Average wet-condition root yields were 220, 1,920 and 1,425 kg/ha at the three reported stages.
- Observation Average dry-condition root yields were 220, 1,535 and 875 kg/ha.
- Observation Root weight was 76% of total plant weight at the 3-leaf stage and 15.6% at maturity.
- Observation Average root N at maturity comprised 9.4–11.5% of mean plant N.
- Association Root density declined curvilinearly with depth.
- Observation N did not influence root distribution, while irrigation increased topsoil root growth by about 5%.
- Association Moisture use rate was directly proportional to root growth rate.