Abstract
Abstract Stockpiled tall fescue [ Lolium arundinaceum (Schreb.) Darbysh.] is an alternative to extend the grazing season and reduce feeding costs during the winter. In addition, adequate fertility management with N, P, and K nutrients can improve forage production. Our objective was to evaluate the impact of N, P, and K fertilization (from 0 to 120 lb/a, 0 and 50 lb/a, and 0 and 30 lb/a, respectively) on forage accumulation (FA) and nutritive value in stockpiled tall fescue in claypan soils. The study was carried out in Columbus, KS, on established ‘Kentucky 31’ tall fescue pastures in the fall of 2019 and 2021 (two years). The treatments were one unfertilized control and fertilization with six combinations of nitrogen (0, 40, 60, 80, and 120 lb/a), phosphorus (0 and 50 lb/a), and potassium (0 and 30 lb/a) rates. Forage accumulation was greater in the treatments with at least 60 lb N/a compared with the unfertilized control (1,235 vs. 570 lb DM/a). However, the greatest crude protein content (CP; 13%) and crude protein accumulation (CPA; 163 lb CP/a) were produced when 120 lb N/a was applied. Nitrogen fertilization also resulted in greater total digestible nutrients, net energy gain, net energy maintenance, and lower acid detergent fiber. Phosphorus and potassium had little effect on the measured responses. Nitrogen fertilization can be an alternative to increase stockpiled tall fescue FA and nutritive value, reducing the need for energy and protein supplementation of livestock during the winter.
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Claims 6
Claim · model-written summary
At least 60 lb N/a increased forage accumulation versus unfertilized control.
- Taxon
- tall fescue
Lolium arundinaceumt0 - Treatment
- at least 60 lb N/ae0
- Outcome
- Forage accumulatione0
- Direction
- greatere0
- Value
- 1,235 vs. 570 lb DM/ae0
- Comparator
- unfertilized controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forage accumulation was greater in the treatments with at least 60 lb N/a compared with the unfertilized control (1,235 vs. 570 lb DM/a).”
t0“Impact of N, P, and K rates on stockpiled tall fescue in claypan soils”
Claim · model-written summary
The greatest crude protein content was 13% at 120 lb N/a.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- 120 lb N/ae0
- Outcome
- crude protein contente0
- Direction
- greateste0
- Value
- 13%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the greatest crude protein content (CP; 13%) and crude protein accumulation (CPA; 163 lb CP/a) were produced when 120 lb N/a was applied.”
t0“Impact of N, P, and K rates on stockpiled tall fescue in claypan soils”
Claim · model-written summary
The greatest crude protein accumulation was 163 lb CP/a at 120 lb N/a.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- 120 lb N/ae0
- Outcome
- crude protein accumulatione0
- Direction
- greateste0
- Value
- 163 lb CP/ae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the greatest crude protein content (CP; 13%) and crude protein accumulation (CPA; 163 lb CP/a) were produced when 120 lb N/a was applied.”
t0“Impact of N, P, and K rates on stockpiled tall fescue in claypan soils”
Claim · model-written summary
Nitrogen fertilization increased total digestible nutrients, net energy gain and maintenance.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- Nitrogen fertilizatione0
- Outcome
- total digestible nutrients, net energy gain, net energy maintenancee0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilization also resulted in greater total digestible nutrients, net energy gain, net energy maintenance”
t0“Impact of N, P, and K rates on stockpiled tall fescue in claypan soils”
Claim · model-written summary
Nitrogen fertilization lowered acid detergent fiber.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- Nitrogen fertilizatione0
- Outcome
- acid detergent fibere0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilization also resulted in greater total digestible nutrients, net energy gain, net energy maintenance, and lower acid detergent fiber.”
t0“Impact of N, P, and K rates on stockpiled tall fescue in claypan soils”
Claim · model-written summary
Phosphorus and potassium had little effect on responses.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- Phosphorus and potassiume0
- Outcome
- measured responsese0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus and potassium had little effect on the measured responses.”
t0“Impact of N, P, and K rates on stockpiled tall fescue in claypan soils”
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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.