Abstract
Strategies to improve sustainability are important in intensively managed potato ( Solanum tuberosum L.) systems. This study has assessed rotation systems and N sources to mitigate potato yield and soil organic matter decline in Prince Edward Island (PEI), Canada. Three‐year potato rotation systems were initiated in 2006: continuous potato (CP); potato–barley ( Hordeum vulgare L.) underseeded with red clover ( Trifolium pratense L.)–red clover (PBR); and potato–barley–sorghum sudan grass ([ Sorghum bicolor L.) used as green manure])/winter rape ( Brassica napus subsp. rapifera ) (PBSW); and potato–barley–canola ([ Brassica napus susbsp. napus ] used as green manure)/winter rape (PBCW). Three different N sources (mineral N fertilizer, liquid hog manure, and lobster flake) were applied in a split‐plot fashion during the potato phase. Potatoes were grown in 2006, 2009, 2012, and again in 2013 to evaluate residual effects. In 2012, total N or total C in the whole soil, in particulate organic matter or in the slurry fractions were not affected by N sources or rotation systems. The PBSW and PBCW rotations generated significantly higher potato yields in 2009 and 2013, whereas the CP rotation produced significantly lower potato yields in 2 of 4 yr. The addition of lobster flake suppressed yield compared with other N sources in 3 of 4 yr. The PBR rotation, which is common in PEI can increase nitrate losses over winter. Alternatively, the PBSW and PBCW rotations may represent a good substitute to the PBR rotation as they can increase potato yield while minimizing nitrate losses.
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Claims 7
Claim · model-written summary
Nitrogen sources and rotations did not affect measured soil N and C fractions in 2012.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- N sources or rotation systemse0
- Outcome
- total N or total C in the whole soil, in particulate organic matter or in the slurry fractionse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2012, total N or total C in the whole soil, in particulate organic matter or in the slurry fractions were not affected by N sources or rotation systems.”
t0“Improving Productivity of Managed Potato Cropping Systems in Eastern Canada: Crop Rotation and Nitrogen Source Effects”
Claim · model-written summary
PBSW rotation produced significantly higher potato yields in 2009 and 2013.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- PBSWe0
- Outcome
- potato yieldse0
- Direction
- highere0
- Qualifier
- 2009 and 2013e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PBSW and PBCW rotations generated significantly higher potato yields in 2009 and 2013”
Claim · model-written summary
PBCW rotation produced significantly higher potato yields in 2009 and 2013.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- PBCWe0
- Outcome
- potato yieldse0
- Direction
- highere0
- Qualifier
- 2009 and 2013e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PBSW and PBCW rotations generated significantly higher potato yields in 2009 and 2013”
Claim · model-written summary
Continuous potato produced significantly lower yields in two of four years.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- CP rotatione0
- Outcome
- potato yieldse0
- Direction
- lowere0
- Value
- 2 of 4 yre0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the CP rotation produced significantly lower potato yields in 2 of 4 yr.”
Claim · model-written summary
Lobster flake suppressed potato yield versus other N sources in three of four years.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- lobster flakee0
- Outcome
- yielde0
- Direction
- suppressede0
- Value
- 3 of 4 yre0
- Comparator
- other N sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of lobster flake suppressed yield compared with other N sources in 3 of 4 yr.”
t0“Improving Productivity of Managed Potato Cropping Systems in Eastern Canada: Crop Rotation and Nitrogen Source Effects”
Claim · model-written summary
The PBR rotation can increase winter nitrate losses.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- PBR rotatione0
- Outcome
- nitrate lossese0
- Direction
- increasee0
- Setting
- PEIe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PBR rotation, which is common in PEI can increase nitrate losses over winter.”
t0“Improving Productivity of Managed Potato Cropping Systems in Eastern Canada: Crop Rotation and Nitrogen Source Effects”
Claim · model-written summary
The authors propose PBSW and PBCW as substitutes for PBR to increase yield and minimize nitrate losses.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- good substitute to the PBR rotatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the PBSW and PBCW rotations may represent a good substitute to the PBR rotation as they can increase potato yield while minimizing nitrate losses.”
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38 papers more in this group
See all 42 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.