Abstract
Core Ideas Forage radish and winter pea cover crops improved nitrogen‐use efficiency in a potato cropping system. A high N‐yielding winterkilled cover crop is preferred over rye for early planting of potato. Rye may not provide the succeeding potato with sufficient N because of early termination. Growers in the northeastern United States often over‐apply N fertilizer to guard against yield limitations. Over fertilization increases costs of production and raises environmental concerns. This study was conducted to evaluate whether using cover crops and N fertilizer management can improve tuber yield and nitrogen‐use efficiency (NUE) in a potato ( Solanum tuberosum L.) production system. Three cover crop species including forage radish ( Raphanus sativus L.), cereal rye ( Secale cereale L.), and winter pea ( Pisum sativum L.); four N fertilizer rates (0, 75, 150, and 225 kg N ha −1 ) and two potato varieties (Dark Red Norland [DRN] and Superior [SUP]) were used in a 2‐yr field experiment. Results indicated that tuber yield and NUE indices can be restricted by either the lowest or highest levels of N fertilizer (75 and 225 kg N ha −1 , respectively). Potato grown in no cover crop plots needed to be fertilized at 225 kg N ha −1 to produce the highest yield (26.5 Mg ha −1 ) whereas potato after winter pea or forage radish produced the same or higher yields at 75 and 150 Kg N ha −1 , respectively ( P ≤ 0.01). Forage radish or winter pea improved NUE in either potato variety as more synchrony existed with respect to N release from cover crop residues and potato N requirements than that of cereal rye. Overall, forage radish or winter pea could be suitable alternatives to cereal rye in rotation with potato as indicated by the cover crop biomass production and N yield, N use metrics, and potato tuber yield.
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Claims 7
Claim · model-written summary
The lowest and highest nitrogen fertilizer rates restricted potato tuber yield and NUE indices.
- Taxon
- Solanum tuberosum L.
Solanum tuberosume1 - Treatment
- N fertilizere0
- Outcome
- tuber yield and NUE indicese0
- Direction
- restrictede0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tuber yield and NUE indices can be restricted by either the lowest or highest levels of N fertilizer (75 and 225 kg N ha −1 , respectively)”
e1“potato ( Solanum tuberosum L.)”
Claim · model-written summary
Potato without cover crops required 225 kg N ha−1 for the highest yield of 26.5 Mg ha−1.
- Taxon
- PotatoSolanum tuberosume0
- Treatment
- 225 kg N ha −1e0
- Outcome
- yielde0
- Direction
- higheste0
- Value
- 26.5 Mg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato grown in no cover crop plots needed to be fertilized at 225 kg N ha −1 to produce the highest yield (26.5 Mg ha −1 )”
Claim · model-written summary
Potato after winter pea produced the same or higher yield with 75 kg N ha−1.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- winter peae0
- Outcome
- yieldse0
- Direction
- same or highere0
- Comparator
- no cover crop plotse1
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato after winter pea or forage radish produced the same or higher yields at 75 and 150 Kg N ha −1 , respectively ( P ≤ 0.01)”
e1“Potato grown in no cover crop plots needed to be fertilized at 225 kg N ha −1 to produce the highest yield”
Claim · model-written summary
Potato after forage radish produced the same or higher yield with 150 kg N ha−1.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- forage radishe0
- Outcome
- yieldse0
- Direction
- same or highere0
- Comparator
- no cover crop plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato after winter pea or forage radish produced the same or higher yields at 75 and 150 Kg N ha −1 , respectively ( P ≤ 0.01)”
e1“Potato grown in no cover crop plots needed to be fertilized at 225 kg N ha −1 to produce the highest yield”
Claim · model-written summary
Forage radish improved potato nitrogen use efficiency relative to cereal rye.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Forage radishe0
- Outcome
- NUEe0
- Direction
- improvede0
- Comparator
- cereal ryee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forage radish or winter pea improved NUE in either potato variety as more synchrony existed with respect to N release from cover crop residues and potato N requirements than that of cereal rye”
Claim · model-written summary
Winter pea improved potato nitrogen use efficiency relative to cereal rye.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- winter peae0
- Outcome
- NUEe0
- Direction
- improvede0
- Comparator
- cereal ryee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forage radish or winter pea improved NUE in either potato variety as more synchrony existed with respect to N release from cover crop residues and potato N requirements than that of cereal rye”
Claim · model-written summary
Forage radish or winter pea were recommended as cover crop alternatives to rye in potato rotation.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- suitable alternatives to cereal rye in rotation with potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“forage radish or winter pea could be suitable alternatives to cereal rye in rotation with potato”
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See all 14 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.