Claim · model-written summary
At Site 1 the 45 kg N/ha treatment took 46 days (early May application) to 72 days (early June application) to reach the 3-leaf stage for the residual harvest.
- Taxon
- perennial ryegrass
Lolium perennet0 - Treatment
- 45 kg N/ha treatmente1
- Outcome
- time takene1
- Value
- 46 (early May application) to 72 (early June application) dayse0
- Qualifier
- residual harveste0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 46 (early May application) to 72 (early June application) days for the residual harvest”
e1“The time taken for the 45 kg N/ha treatment to reach the 3-leaf stage of development ranged from 38”
t0“perennial ryegrass–white clover dairy pastures”
Title
J. L. Jacobs; F. R. McKenzie; M. J. Ryan; et al. Australian Journal of Agricultural Research 1999. doi:10.1071/ar98196
Other claims from this paper (12)
- Intervention effect Increasing nitrogen fertiliser levels gave a linear primary dry matter yield response at Site 1 and a curvilinear one at Site 2 in perennial ryegrass-white clover pasture.
- Intervention effect Residual dry matter yield responses to nitrogen were linear at both sites.
- Intervention effect At Site 1 the highest primary dry matter yield response was 9.1 kg DM per kg N, with the mid-April nitrogen application.
- Intervention effect At Site 1 the highest residual nitrogen response was 9.4 kg DM per kg N, with the mid-May application.
- Observation At Site 1 the 45 kg N/ha treatment took 38 days (early June application) to 47 days (mid-April application) to reach the 3-leaf stage for the primary harvest.
- Intervention effect At Site 2 the highest primary dry matter yield response to nitrogen was 15.8 kg DM per kg N at 45 kg N/ha (mid-April application).
- Intervention effect At Site 2 the highest residual nitrogen response was 8.3 kg DM per kg N, with the mid-June application.
- Observation At Site 2 the 45 kg N/ha treatment took 24 days (early June application) to 36 days (mid-April and early May applications) to reach the 3-leaf stage for the primary harvest.
- Observation At Site 2 the 45 kg N/ha treatment took 30 days (mid-April) to 57 days (early June application) to reach the 3-leaf stage for the residual harvest.
- Recommendation Based on the current cost of urea, autumn to midwinter nitrogen fertiliser use is concluded to be economically viable for dairy farmers.
- Intervention effect Botanical composition of the pasture was unaffected by nitrogen application, with no treatment effects at either site the following spring.
- Recommendation A once-off strategic nitrogen application of up to 60 kg N/ha in autumn to midwinter is concluded not likely to influence dairy pasture composition in western Victoria.