Claim · model-written summary
In 1978, rape crude protein levels were generally highest with herbicides.
- Taxon
- Rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Treatment
- herbicidese0
- Outcome
- CP levelse0
- Direction
- higheste0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“Rape CP levels in 1978 were generally highest where herbicides were used”
Title
Forage Yield and Quality of Brassicasp. Established Using Preemergence Herbicides1
J. L. Griffin; G. A. Jung; N. L. Hartwig Agronomy Journal 1984. doi:10.2134/agronj1984.00021962007600010028x
Other claims from this paper (19)
- Intervention effect Herbicide treatments generally did not affect turnip forage yield 100 days after seeding.
- Intervention effect Herbicide treatments generally did not affect rape forage yield 100 days after seeding.
- Intervention effect All herbicide treatments significantly reduced weed yields in turnips.
- Intervention effect All herbicide treatments significantly reduced weed yields in rape.
- Intervention effect Pendimethalin at 2.2 kg ha −1 reduced turnip yield by 67% relative to untreated controls.
- Intervention effect Pendimethalin at 2.2 kg ha −1 reduced rape yield by 17% relative to untreated controls.
- Observation Turnip forage dry matter yield reached 5068 kg ha −1 with adequate weed control.
- Observation Rape forage dry matter yield reached 6711 kg ha −1 with adequate weed control.
- Intervention effect In 1978, turnip whole-plant crude protein was highest at 227 g kg −1 under pendimethalin at 2.2 kg ha −1.
- Intervention effect In the second year, turnip leaf crude protein levels were similar across herbicide treatments.
- Intervention effect Second-year turnip root crude protein was highest with pendimethalin at 2.2 kg ha −1.
- Intervention effect High-rate pendimethalin inhibited turnip root development, producing smaller roots.
- Intervention effect In 1979, rape crude protein was not affected by herbicide application.
- Observation Across herbicide treatments, turnip whole-plant crude protein averaged 121 g kg −1.
- Observation Across herbicide treatments, rape crude protein averaged 106 g kg −1.
- Intervention effect Turnip in vitro dry matter disappearance averaged 898 g kg −1 and was unaffected by herbicide application.
- Intervention effect Rape in vitro dry matter disappearance averaged 898 g kg −1 and was unaffected by herbicide application.
- Recommendation The authors conclude that appropriate preemergence herbicides reduce early weed competition and enhance early turnip and rape production.
- Recommendation The authors recommend considering turnips and rape as supplemental summer forage crops.