Abstract
Three separate experiments were conducted with orchardgrass (Dactylis glomerata L.), quackgrass (Agropyron repens L.), and reed canarygrass (Phalaris arundinacea L.) to determine the timing and rate effects of N fertilization for forage production on organic soils in northern Minnesota. Nine N treatments, using 0, 168 and 336 kg N/ha, were applied in single or split (up to four) applications during the growing season. Dry matter (DM) production and crude protein content of the forage were determined in a four-clipping management program. With N fertilization total DM production for the 2-yr study was increased, on the average, by 104, 37, and 121% for orchardgrass, quackgrass, and reed canarygrass. Total production of all three grasses was significantly increased up to the 336 kg N/ha application. On the control areas (0 N) quackgrass produced an average of 61 and 82% more total forage than orchardgrass and reed canarygrass. Split applications of fertilizer N during the growing season had relatively little influence on total DM productions. However, applying N later in the growing season significantly increased DM production of reed canarygrass for the third and fourth clippings. Late N applications significantly influenced orchardgrass in the third and fourth clippings consistently during only 1 yr of the experiment and did not alter quack-grass production in either year.Key words: Histosols, Dactylis glomerata L., Agropyron repens L., Phalaris arundinacea L.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Nitrogen fertilization increased orchardgrass total dry matter production by 104%.
- Taxon
- orchardgrass
.jpg?width=60)
Dactylis glomeratae0 - Treatment
- N fertilizatione0
- Outcome
- total DM productione0
- Direction
- increasede0
- Value
- 104e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“With N fertilization total DM production for the 2-yr study was increased, on the average, by 104, 37, and 121% for orchardgrass, quackgrass, and reed canarygrass.”
Claim · model-written summary
Nitrogen fertilization increased quackgrass total dry matter production by 37%.
- Taxon
- quackgrasse0
- Treatment
- N fertilizatione0
- Outcome
- total DM productione0
- Direction
- increasede0
- Value
- 37e0
Not reportedComparator
Verbatim
e0“With N fertilization total DM production for the 2-yr study was increased, on the average, by 104, 37, and 121% for orchardgrass, quackgrass, and reed canarygrass.”
Claim · model-written summary
Nitrogen fertilization increased reed canarygrass total dry matter production by 121%.
- Taxon
- reed canarygrasse0
- Treatment
- N fertilizatione0
- Outcome
- total DM productione0
- Direction
- increasede0
- Value
- 121%e0
Not reportedComparator
Verbatim
e0“With N fertilization total DM production for the 2-yr study was increased, on the average, by 104, 37, and 121% for orchardgrass, quackgrass, and reed canarygrass.”
Claim · model-written summary
Total production of all three grasses increased significantly through 336 kg N/ha.
Not reportedComparator
Verbatim
e0“Total production of all three grasses was significantly increased up to the 336 kg N/ha application.”
Claim · model-written summary
Without fertilizer, quackgrass produced 61% more forage than orchardgrass.
Verbatim
e0“On the control areas (0 N) quackgrass produced an average of 61 and 82% more total forage than orchardgrass and reed canarygrass.”
Claim · model-written summary
Without fertilizer, quackgrass produced 82% more forage than reed canarygrass.
Verbatim
e0“On the control areas (0 N) quackgrass produced an average of 61 and 82% more total forage than orchardgrass and reed canarygrass.”
Claim · model-written summary
Split nitrogen applications had little effect on total dry matter production.
- Treatment
- Split applications of fertilizer Ne0
- Outcome
- total DM productionse0
- Direction
- relatively little influencee0
Not reportedTaxonComparator
Verbatim
e0“Split applications of fertilizer N during the growing season had relatively little influence on total DM productions.”
Claim · model-written summary
Later nitrogen increased reed canarygrass third and fourth clipping dry matter.
- Taxon
- reed canarygrasse0
- Organ / stage
- third and fourth clippingse0
- Treatment
- applying N later in the growing seasone0
- Outcome
- DM productione0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“applying N later in the growing season significantly increased DM production of reed canarygrass for the third and fourth clippings.”
Claim · model-written summary
Late nitrogen affected orchardgrass third and fourth clipping production in one year.
- Taxon
- orchardgrassDactylis glomeratae0
- Treatment
- Late N applicationse0
- Outcome
- third and fourth clippingse0
- Qualifier
- only 1 yre0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late N applications significantly influenced orchardgrass in the third and fourth clippings consistently during only 1 yr of the experiment”
Claim · model-written summary
Late nitrogen did not alter quackgrass production in either year.
Not reportedTreatmentComparator
Verbatim
e0“did not alter quack-grass production in either year.”
The same questions in other papers
fertilization · growth · Dactylis glomerata (cocksfoot)Positive and negative results
8 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- 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.