Abstract
The influence of a top-dressing of nitrogen fertilizer (calcium nitrate, CaNO3) on the individual plant height and weight, herb yield and nitrate content of dragonhead (Dracocephalum moldavica L.) was studied in 1987 in Puumala, Finland. The nitrogen doses applied ranged from 0 to 270 kg/ha. Nitrogen fertilization increased both the individual plant height and weight, the fresh and dry herb yield and the nitrate content of the plants. However, no optimum nitrogen dose could be found since the maximum was not reached in most of the cases. An exception was the herb yield (d.w.) of transplanted plants, harvested at the flowering stage, where a nitrogen dose of 70—80 kg/ha gave the highest yield. If the plants were allowed to grow a few weeks more the yield was four fold compared to the earlier harvesting. Sown plants gave a yield two times higher than the transplanted plants, but this was partly due to the greater plant density on the sown plots.
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Claims 7
Claim · model-written summary
Nitrogen increased individual plant height and weight.
- Taxon
- Dracocephalum moldavica L.
Dracocephalum moldavicae1 - Treatment
- Nitrogen fertilizatione0
- Outcome
- individual plant height and weighte0
- Direction
- increasede0
- Setting
- Puumala, Finlande2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilization increased both the individual plant height and weight, the fresh and dry herb yield and the nitrate content of the plants.”
e1“dragonhead (Dracocephalum moldavica L.)”
e2“in Puumala, Finland”
Claim · model-written summary
Nitrogen increased fresh and dry herb yield.
- Taxon
- Dracocephalum moldavica L.Dracocephalum moldavicae1
- Treatment
- Nitrogen fertilizatione0
- Outcome
- fresh and dry herb yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilization increased both the individual plant height and weight, the fresh and dry herb yield and the nitrate content of the plants.”
e1“dragonhead (Dracocephalum moldavica L.)”
Claim · model-written summary
Nitrogen increased plant nitrate content.
- Taxon
- Dracocephalum moldavica L.Dracocephalum moldavicae1
- Treatment
- Nitrogen fertilizatione0
- Outcome
- nitrate contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilization increased both the individual plant height and weight, the fresh and dry herb yield and the nitrate content of the plants.”
e1“dragonhead (Dracocephalum moldavica L.)”
Claim · model-written summary
No optimum nitrogen dose was found for most endpoints because their maxima were not reached.
- Taxon
- Dracocephalum moldavica L.Dracocephalum moldavicae1
- Outcome
- no optimum nitrogen dose could be founde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, no optimum nitrogen dose could be found since the maximum was not reached in most of the cases.”
e1“dragonhead (Dracocephalum moldavica L.)”
Claim · model-written summary
70—80 kg/ha nitrogen gave the highest dry herb yield of transplanted plants at flowering.
- Taxon
- Dracocephalum moldavica L.Dracocephalum moldavicae1
- Organ / stage
- flowering stagee0
- Treatment
- nitrogen dose of 70—80 kg/hae0
- Outcome
- herb yield (d.w.)e0
- Direction
- higheste0
- Qualifier
- transplanted plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An exception was the herb yield (d.w.) of transplanted plants, harvested at the flowering stage, where a nitrogen dose of 70—80 kg/ha gave the highest yield.”
e1“dragonhead (Dracocephalum moldavica L.)”
Claim · model-written summary
A few additional weeks of growth gave fourfold yield relative to earlier harvest.
- Taxon
- Dracocephalum moldavica L.Dracocephalum moldavicae1
- Treatment
- allowed to grow a few weeks moree0
- Outcome
- yielde0
- Direction
- higherinferrede0
- Value
- four folde0
- Comparator
- earlier harvestinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If the plants were allowed to grow a few weeks more the yield was four fold compared to the earlier harvesting.”
e1“dragonhead (Dracocephalum moldavica L.)”
Claim · model-written summary
Sown plants yielded twice as much as transplanted plants, partly because of greater density.
- Taxon
- Dracocephalum moldavica L.Dracocephalum moldavicae1
- Treatment
- Sowne0
- Outcome
- yielde0
- Direction
- highere0
- Value
- two timese0
- Qualifier
- partly due to the greater plant densitye0
- Comparator
- transplanted plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sown plants gave a yield two times higher than the transplanted plants, but this was partly due to the greater plant density on the sown plots.”
e1“dragonhead (Dracocephalum moldavica L.)”
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See all 10 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.