Abstract
Crop yield response to micronutrient fertilization is difficult to predict, particularly under unfavorable environmental conditions as these may alter both crop nutrient demand and the soil micronutrient supply to plant roots. The research objective was to evaluate the effect of various soil temperature and moisture conditions on crop growth response to added micronutrient copper (Cu), zinc (Zn), and boron (B) along with soil micronutrient supply and distribution among fractions. Brown and Dark Brown farm soils collected from southern Saskatchewan were used to grown wheat, pea and canola within controlled environment chambers. The biomass yields of all crops decreased under cold soil temperature and moisture stress (drought and saturated) conditions. Greater plant uptake of Cu, Zn, and B was associated with optimum (i.e., field capacity) soil moisture and warm temperature (23°C) growing conditions, compared to drought (i.e., 50% field capacity), saturated, and cold (5°C) temperature conditions. Environmental stress had the greatest impact on pea growth, reducing crop yield and micronutrient utilization efficiency more than 95%. Soil supplies of Cu and Zn were most negatively impacted by drought stress due to reduced mobility of these diffusion limited nutrients. The extractable micronutrients levels and chemical speciation fractions of Cu, Zn, and B indicating that bioavailability and micronutrient transformation were not affected during our short-term (i.e., six-weeks) study. However, it is suggested that assessments of micronutrient forms also be conducted on soil samples under actual moisture and temperature conditions as they exist in the experiment, as well as on dried, processed samples.
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Claims 11
Claim · model-written summary
wheat biomass yield fell under cold soil temperature and moisture stress.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- cold soil temperature and moisture stress (drought and saturated) conditionse0
- Outcome
- biomass yieldse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass yields of all crops decreased under cold soil temperature and moisture stress (drought and saturated) conditions.”
t0“wheat”
Claim · model-written summary
pea biomass yield fell under cold soil temperature and moisture stress.
- Taxon
- pea
Lathyrus oleraceust0 - Treatment
- cold soil temperature and moisture stress (drought and saturated) conditionse0
- Outcome
- biomass yieldse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass yields of all crops decreased under cold soil temperature and moisture stress (drought and saturated) conditions.”
t0“pea”
Claim · model-written summary
canola biomass yield fell under cold soil temperature and moisture stress.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napust0 - Treatment
- cold soil temperature and moisture stress (drought and saturated) conditionse0
- Outcome
- biomass yieldse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The biomass yields of all crops decreased under cold soil temperature and moisture stress (drought and saturated) conditions.”
t0“canola”
Claim · model-written summary
wheat had greater micronutrient uptake with field-capacity moisture and 23°C than under stress conditions.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- plant uptake of Cu, Zn, and Be0
- Direction
- Greatere0
- Comparator
- drought (i.e., 50% field capacity), saturated, and cold (5°C) temperature conditionse0
- Setting
- optimum (i.e., field capacity) soil moisture and warm temperature (23°C) growing conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greater plant uptake of Cu, Zn, and B was associated with optimum (i.e., field capacity) soil moisture and warm temperature (23°C) growing conditions, compared to drought (i.e., 50% field capacity), saturated, and cold (5°C) temperature conditions.”
t0“wheat”
Claim · model-written summary
pea had greater micronutrient uptake with field-capacity moisture and 23°C than under stress conditions.
- Taxon
- peaLathyrus oleraceust0
- Outcome
- plant uptake of Cu, Zn, and Be0
- Direction
- Greatere0
- Comparator
- drought (i.e., 50% field capacity), saturated, and cold (5°C) temperature conditionse0
- Setting
- optimum (i.e., field capacity) soil moisture and warm temperature (23°C) growing conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greater plant uptake of Cu, Zn, and B was associated with optimum (i.e., field capacity) soil moisture and warm temperature (23°C) growing conditions, compared to drought (i.e., 50% field capacity), saturated, and cold (5°C) temperature conditions.”
t0“pea”
Claim · model-written summary
canola had greater micronutrient uptake with field-capacity moisture and 23°C than under stress conditions.
- Taxon
- canolaBrassica napus var. napust0
- Outcome
- plant uptake of Cu, Zn, and Be0
- Direction
- Greatere0
- Comparator
- drought (i.e., 50% field capacity), saturated, and cold (5°C) temperature conditionse0
- Setting
- optimum (i.e., field capacity) soil moisture and warm temperature (23°C) growing conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greater plant uptake of Cu, Zn, and B was associated with optimum (i.e., field capacity) soil moisture and warm temperature (23°C) growing conditions, compared to drought (i.e., 50% field capacity), saturated, and cold (5°C) temperature conditions.”
t0“canola”
Claim · model-written summary
Environmental stress reduced pea crop yield by more than 95%.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Environmental stresse0
- Outcome
- crop yielde0
- Direction
- reducinge0
- Value
- more than 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Environmental stress had the greatest impact on pea growth, reducing crop yield and micronutrient utilization efficiency more than 95%.”
Claim · model-written summary
Environmental stress reduced pea micronutrient utilization efficiency by more than 95%.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Environmental stresse0
- Outcome
- micronutrient utilization efficiencye0
- Direction
- reducinge0
- Value
- more than 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Environmental stress had the greatest impact on pea growth, reducing crop yield and micronutrient utilization efficiency more than 95%.”
Claim · model-written summary
Drought most negatively affected soil Cu and Zn supplies through reduced nutrient mobility.
Not reportedTaxon
Verbatim
e0“Soil supplies of Cu and Zn were most negatively impacted by drought stress due to reduced mobility of these diffusion limited nutrients.”
Claim · model-written summary
Micronutrient bioavailability and transformation were unaffected over the six-week study.
- Outcome
- bioavailability and micronutrient transformatione0
- Direction
- not affectede0
- Qualifier
- short-term (i.e., six-weeks) studye0
Not reportedTaxon
Verbatim
e0“The extractable micronutrients levels and chemical speciation fractions of Cu, Zn, and B indicating that bioavailability and micronutrient transformation were not affected during our short-term (i.e., six-weeks) study.”
Claim · model-written summary
The authors recommend assessing soil micronutrient forms under actual experimental conditions and in dried samples.
- Outcome
- assessments of micronutrient forms also be conducted on soil samples under actual moisture and temperature conditions as they exist in the experiment, as well as on dried, processed samplese0
Not reportedTaxon
Verbatim
e0“it is suggested that assessments of micronutrient forms also be conducted on soil samples under actual moisture and temperature conditions as they exist in the experiment, as well as on dried, processed samples.”
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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.