Abstract
Dairy producers in the northeastern USA who grow corn ( Zea mays L.) forage in narrow rows plant at 125000 plants ha −1 and fertilize at 225 kg N ha −1 because they believe narrow‐row corn yields best at high plant densities and N rates. We evaluated corn in 1996 and 1997 at two row spacings (0.38 and 0.76 m), two harvest densities (80000 and 116000 plants ha −1 ), and six N rates (0, 50, 100, 150, 200, and 250 kg ha −1 ) to determine if row spacing × plant density × N rate interactions existed for dry matter (DM) and calculated milk yields. No interactions existed for DM yield, forage quality characteristics, and milk yields. Corn had greater DM and milk yields at 0.38‐ (20.3 and 16.1 Mg ha −1 , respectively) vs. 0.76‐m spacing (18.9 and 15.2 Mg ha −1 , respectively). Dry matter and milk yields had quadratic‐plus‐plateau responses to N rates with maximum yields (20.6 and 17.1 Mg ha −1 , respectively) at an N rate of 150 kg ha −1 . Nitrogen accumulation at harvest, which had a row spacing × N rate interaction, had a linear response to N rates at 0.38‐m spacing and a quadratic response at 0.76‐m spacing. Dairy farmers in the northeastern USA can produce corn silage at similar plant densities and N fertility, regardless of row spacing. Dairy producers who have excess animal waste could apply slightly more N to narrow‐row corn silage because it accumulates more N at harvest.
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Claims 9
Claim · model-written summary
No row spacing x plant density x N rate interactions existed for dry matter yield, forage quality characteristics or calculated milk yields in corn.
- Taxon
- Corn
Zea mays subsp. mayst0 - Outcome
- interactions existed for DM yield, forage quality characteristics, and milk yieldse0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn Silage”
e0“No interactions existed for DM yield, forage quality characteristics, and milk yields”
Claim · model-written summary
Corn had greater dry matter yield at 0.38 m row spacing (20.3 Mg ha-1) than at 0.76 m spacing (18.9 Mg ha-1).
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- 0.38‐e1
- Outcome
- DMe1
- Direction
- greatere1
- Value
- 20.3e1
- Qualifier
- 18.9 and 15.2 Mg ha −1e1
- Comparator
- 0.76‐m spacinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Corn had greater DM and milk yields at 0.38‐ (20.3 and 16.1 Mg ha −1 , respectively) vs. 0.76‐m spacing (18.9 and 15.2 Mg ha −1 , respectively)”
Claim · model-written summary
Corn had greater calculated milk yield at 0.38 m row spacing (16.1 Mg ha-1) than at 0.76 m spacing (15.2 Mg ha-1).
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- 0.38‐e1
- Outcome
- milk yieldse1
- Direction
- greatere1
- Value
- 16.1 Mg ha −1e1
- Qualifier
- 15.2 Mg ha −1e1
- Comparator
- 0.76‐m spacinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Corn had greater DM and milk yields at 0.38‐ (20.3 and 16.1 Mg ha −1 , respectively) vs. 0.76‐m spacing (18.9 and 15.2 Mg ha −1 , respectively)”
Claim · model-written summary
Corn dry matter yield had a quadratic-plus-plateau response to N rate, with a maximum of 20.6 Mg ha-1 at 150 kg N ha-1.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- N rate of 150 kg ha −1e2
- Outcome
- Dry mattere2
- Direction
- maximume2
- Value
- 20.6e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn Silage”
e2“Dry matter and milk yields had quadratic‐plus‐plateau responses to N rates with maximum yields (20.6 and 17.1 Mg ha −1 , respectively) at an N rate of 150 kg ha −1”
Claim · model-written summary
Corn calculated milk yield had a quadratic-plus-plateau response to N rate, with a maximum of 17.1 Mg ha-1 at 150 kg N ha-1.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- N rate of 150 kg ha −1e2
- Outcome
- milk yieldse2
- Direction
- maximume2
- Value
- 17.1 Mg ha −1e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn Silage”
e2“Dry matter and milk yields had quadratic‐plus‐plateau responses to N rates with maximum yields (20.6 and 17.1 Mg ha −1 , respectively) at an N rate of 150 kg ha −1”
Claim · model-written summary
Nitrogen accumulation in corn at harvest, which showed a row spacing x N rate interaction, had a linear response to N rates at 0.38 m row spacing.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Nitrogen accumulation at harveste3
- Qualifier
- linear response to N rates at 0.38‐m spacinge3
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn Silage”
e3“Nitrogen accumulation at harvest, which had a row spacing × N rate interaction, had a linear response to N rates at 0.38‐m spacing and a quadratic response at 0.76‐m spacing”
Claim · model-written summary
Nitrogen accumulation in corn at harvest had a quadratic response to N rates at 0.76 m row spacing.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Nitrogen accumulation at harveste3
- Qualifier
- quadratic response at 0.76‐m spacinge3
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn Silage”
e3“Nitrogen accumulation at harvest, which had a row spacing × N rate interaction, had a linear response to N rates at 0.38‐m spacing and a quadratic response at 0.76‐m spacing”
Claim · model-written summary
Dairy farmers in the northeastern USA can produce corn silage at similar plant densities and N fertility regardless of row spacing.
Not reportedTreatmentComparatorDirection
Verbatim
e4“Dairy farmers in the northeastern USA can produce corn silage at similar plant densities and N fertility, regardless of row spacing”
Claim · model-written summary
Dairy producers with excess animal waste could apply slightly more N to narrow-row corn silage because it accumulates more N at harvest.
Not reportedTreatmentComparatorDirection
Verbatim
e5“Dairy producers who have excess animal waste could apply slightly more N to narrow‐row corn silage because it accumulates more N at harvest”
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