Abstract
Abstract Winter canola ( Brassica napus L.) production has increased in the Great Plains as producers seek a rotational and alternative crop to winter wheat ( Triticum aestivum L). However, limited information is available if canola could be used for dual‐purpose without significantly affecting grain yield. The objectives of this study were to (a) investigate dual‐purpose potential and (b) impact of companion crops on growth, survival, biomass, and grain yield of canola. The study was conducted in 2011 and 2012 at Garden City, KS. The experimental design of the study was a randomized complete block design with split‐plot arrangement. Main plot treatments were a factorial of canola cultivars (Griffin or Wichita) and companion crop treatments (none, spring triticale [ × Triticosecale Wittm. ex A. Camus], winter triticale, radish [ Raphanus raphanistrum subsp. sativus (L.) Domin], and turnip [ Brassica rapa var. rapa L.]), and the split‐plot treatments were single‐purpose (grain only) or dual‐purpose (grain and forage) management. Averaged across cultivars and years, grain yield was 70% greater when canola was used for single‐purpose (grain‐only) compared with dual‐purpose. Griffin grain yield tended to be relatively greater than Wichita in dual‐purpose use. Averaged across the two years, turnip as a companion crop decreased canola yield by 38% but resulted in greater forage accumulation. In conclusion, dual‐purpose canola has a grain yield penalty, but effects may vary by cultivar. Companion cropping did not benefit canola and in some cases negatively affected grain yield. When grain production is the primary objective, both companion cropping and forage use should be avoided.
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Claims 7
Claim · model-written summary
Single-purpose (grain-only) canola had 70% greater grain yield than dual-purpose use, averaged across cultivars and years.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse1 - Treatment
- single‐purpose (grain‐only)e1
- Outcome
- grain yielde1
- Direction
- greatere1
- Value
- 70%e1
- Comparator
- dual‐purposee1
- Setting
- Garden City, KSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Averaged across cultivars and years, grain yield was 70% greater when canola was used for single‐purpose (grain‐only) compared with dual‐purpose”
e0“The study was conducted in 2011 and 2012 at Garden City, KS”
Claim · model-written summary
Griffin canola tended to have relatively greater grain yield than Wichita in dual-purpose use.
- Taxon
- canolaBrassica napus var. napuse1
- Material
- Griffine2
- Treatment
- dual‐purpose usee2
- Outcome
- grain yielde2
- Direction
- greatere2
- Qualifier
- tended to be relativelye2
- Comparator
- Wichitae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Averaged across cultivars and years, grain yield was 70% greater when canola was used for single‐purpose (grain‐only) compared with dual‐purpose”
e2“Griffin grain yield tended to be relatively greater than Wichita in dual‐purpose use”
Claim · model-written summary
Turnip as a companion crop decreased canola yield by 38%, averaged across the two years.
- Taxon
- canolaBrassica napus var. napuse3
- Treatment
- turnip as a companion crope3
- Outcome
- canola yielde3
- Direction
- decreasede3
- Value
- 38%e3
- Qualifier
- Averaged across the two yearse3
- Setting
- Garden City, KSe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Averaged across the two years, turnip as a companion crop decreased canola yield by 38% but resulted in greater forage accumulation”
e0“The study was conducted in 2011 and 2012 at Garden City, KS”
Claim · model-written summary
Turnip as a companion crop resulted in greater forage accumulation.
- Taxon
- canolaBrassica napus var. napuse3
- Treatment
- turnip as a companion crope3
- Outcome
- forage accumulatione3
- Direction
- greatere3
- Qualifier
- Averaged across the two yearse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Averaged across the two years, turnip as a companion crop decreased canola yield by 38% but resulted in greater forage accumulation”
Claim · model-written summary
Companion cropping did not benefit canola.
- Taxon
- canolaBrassica napus var. napuse4
- Treatment
- Companion croppinge4
- Outcome
- benefite4
- Direction
- no_changeinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Companion cropping did not benefit canola and in some cases negatively affected grain yield”
Claim · model-written summary
Companion cropping negatively affected canola grain yield in some cases.
- Taxon
- canolaBrassica napus var. napuse4
- Treatment
- Companion croppinge4
- Outcome
- grain yielde4
- Direction
- decreaseinferrede4
- Qualifier
- in some casese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Companion cropping did not benefit canola and in some cases negatively affected grain yield”
Claim · model-written summary
Companion cropping and forage use should be avoided when grain production is the primary objective.
- Taxon
- canolaBrassica napus var. napuse1
- Outcome
- companion cropping and forage usee5
- Qualifier
- When grain production is the primary objectivee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“When grain production is the primary objective, both companion cropping and forage use should be avoided”
e1“Averaged across cultivars and years, grain yield was 70% greater when canola was used for single‐purpose (grain‐only) compared with dual‐purpose”
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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.