Abstract
Abstract In a series of experiments, cucumber, eggplant and sweet pepper were grown in rockwool with nutrient solutions of different ratios of potassium (K), calcium (Ca) and magnesium (Mg). The ratios between the anions in the nutrient solutions compared were the same. In addition to yield, the concentrations of cations in the root environment and in different plant tissues were determined. The results show that the yield for eggplant fruits were strongly reduced by a low Mg level, while the yield of cucumbers seemed to be somewhat reduced by a low Ca supply. Sweet pepper yields were not affected among the cation ratios compared. Relationships between cation contents in the root environment and cation contents in plant tissues were established. The correlation coefficients for these relationships were very high. The equations calculated for the various cations show remarkable differences. Regression coefficients and intercepts strongly depend on crop and plant part sampled. For Mg, it could be established that Ca strongly affected the uptake of Mg.
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Claims 6
Claim · model-written summary
Low magnesium strongly reduced eggplant fruit yield.
- Taxon
- eggplant
Solanum melongenae0 - Treatment
- low Mg levele0
- Outcome
- yield for eggplant fruitse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield for eggplant fruits were strongly reduced by a low Mg level”
Claim · model-written summary
Low calcium seemed to somewhat reduce cucumber yield.
- Taxon
- cucumbers
Cucumis sativuse0 - Treatment
- low Ca supplye0
- Outcome
- yield of cucumberse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of cucumbers seemed to be somewhat reduced by a low Ca supply”
Claim · model-written summary
Sweet pepper yields did not vary among cation ratios.
- Taxon
- Sweet pepper
Capsicum annuume0 - Treatment
- cation ratiose0
- Outcome
- yieldse0
- Direction
- not affectede0
- Comparator
- cation ratios comparede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sweet pepper yields were not affected among the cation ratios compared”
Claim · model-written summary
Root environment and tissue cation contents were very highly correlated.
Verbatim
e0“Relationships between cation contents in the root environment and cation contents in plant tissues were established. The correlation coefficients for these relationships were very high”
t0“fruit‐vegetable crops”
Claim · model-written summary
Regression coefficients and intercepts differed by crop and sampled plant part.
Verbatim
e0“Regression coefficients and intercepts strongly depend on crop and plant part sampled”
t0“fruit‐vegetable crops”
Claim · model-written summary
Calcium strongly affected magnesium uptake.
Not reportedDirection
Verbatim
e0“For Mg, it could be established that Ca strongly affected the uptake of Mg”
t0“fruit‐vegetable crops”
The same questions in other papers
calcium atom · yield · Cucumis sativus (cucumber)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- no effect
- no effect
8 papers more in this group
See all 12 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.