Abstract
Guidelines for N fertilizer management of potato ( Solanum tuberosum L.) that include application timing and rates are fundamental to minimize yield reduction risks. The study objectives were to determine the effect of N fertilizer rate, applied at the plant emergence and tuber initiation stages, on N use efficiency and yield of cultivar Atlantic chipping potato. Fertilizer rates of 0, 56, 112, 168 kg ha −1 were applied at plant emergence, and 56 and 112 kg ha −1 were applied at tuber initiation as a side‐dress in a factorial randomized complete block design with four replicates in three consecutive years at three commercial farms. All treatments received 56 kg ha −1 of N at pre‐plant. Total N fertilizer applied ranged from 112 to 370 kg ha −1 . Applied N rates influenced the levels of soil inorganic N. The maximum daily N uptake occurred between 55 and 70 d after planting, coinciding with the onset of the tuber bulking stage. Potato yield was similar between N rates applied at emergence with the exception of one farm in 2010 due to high precipitation. Average tuber yield ranged from 15 to 33, 29 to 41, and 33 to 39 Mg ha −1 in 2010, 2011, and 2012, respectively. Tuber yield and plant N uptake were similar with N rates above 56 kg ha −1 applied‐at tuber initiation. There was an increased residual concentration of soil N at harvest with higher N application; however, this did not correlate to an increase in potato yield.
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Claims 7
Claim · model-written summary
Potato yield was similar between N rates applied at emergence, except one farm in 2010
- Taxon
- potato
Solanum tuberosume0 - Treatment
- N rates applied at emergencee1
- Outcome
- yielde1
- Direction
- similare1
- Qualifier
- with the exception of one farm in 2010 due to high precipitatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer management of potato ( Solanum tuberosum L.)”
e1“Potato yield was similar between N rates applied at emergence with the exception of one farm in 2010 due to high precipitation”
Claim · model-written summary
Average potato tuber yield ranged from 15 to 39 Mg/ha across 2010 to 2012 on three commercial farms
- Taxon
- potatoSolanum tuberosume0
- Outcome
- Average tuber yielde2
- Value
- 15 to 33, 29 to 41, and 33 to 39e2
- Setting
- three commercial farmse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer management of potato ( Solanum tuberosum L.)”
e2“Average tuber yield ranged from 15 to 33, 29 to 41, and 33 to 39”
e3“at three commercial farms”
Claim · model-written summary
Tuber yield and plant N uptake were similar with N rates above 56 kg/ha applied at tuber initiation
- Taxon
- potatoSolanum tuberosume0
- Treatment
- N rates above 56 kg hae4
- Outcome
- Tuber yield and plant N uptakee4
- Direction
- similare4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer management of potato ( Solanum tuberosum L.)”
e4“Tuber yield and plant N uptake were similar with N rates above 56 kg ha”
Claim · model-written summary
Maximum daily N uptake by potato occurred 55 to 70 days after planting, at the onset of tuber bulking
- Taxon
- potatoSolanum tuberosume0
- Organ / stage
- tuber bulking stagee5
- Outcome
- maximum daily N uptakee5
- Value
- between 55 and 70 de5
- Qualifier
- coinciding with the onset of the tuber bulking stagee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer management of potato ( Solanum tuberosum L.)”
e5“The maximum daily N uptake occurred between 55 and 70 d after planting, coinciding with the onset of the tuber bulking stage”
Claim · model-written summary
Higher N application increased residual soil N at harvest
- Taxon
- potatoSolanum tuberosume0
- Treatment
- higher N applicatione6
- Outcome
- residual concentration of soil N at harveste6
- Direction
- increasede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer management of potato ( Solanum tuberosum L.)”
e6“There was an increased residual concentration of soil N at harvest with higher N application”
Claim · model-written summary
Higher residual soil N with higher N application did not correlate with an increase in potato yield
- Taxon
- potatoSolanum tuberosume0
- Treatment
- higher N applicatione6
- Outcome
- potato yielde7
- Direction
- increasee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer management of potato ( Solanum tuberosum L.)”
e6“There was an increased residual concentration of soil N at harvest with higher N application”
e7“this did not correlate to an increase in potato yield”
Claim · model-written summary
Applied N rates influenced soil inorganic N levels
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Applied N ratese1
- Outcome
- levels of soil inorganic Ne1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer management of potato ( Solanum tuberosum L.)”
e1“Applied N rates influenced the levels of soil inorganic N”
The same questions in other papers
nitrogen · yield · Solanum tuberosum (potato)Results differ
22 papers in the same direction as this paper · 109 in the opposite direction
- positive
- positive
- positive
128 papers more in this group
See all 132 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.