Claim · model-written summary
Increasing K rate did not significantly change pasture Mg and Ca in most months.
- Taxon
- pasturet0
- Treatment
- Increasing rate of Ke5
- Outcome
- pasture Mg and Cae5
- Direction
- did not significantly changee5
- Qualifier
- in most monthse5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Verbatim
t0“pasture”
e5“Increasing rate of K did not significantly change pasture Mg and Ca in most months but significantly decreased pasture Na”
Title
Potassium in soil and pasture and leaching of cations on an allophanic soil in New Zealand
J. D. Morton; C. G. Roach; M. J. Tong; et al. New Zealand Journal of Agricultural Research 2004. doi:10.1080/00288233.2004.9513582
Other claims from this paper (11)
- Intervention effect Soil quick-test K increased with KCl rate at the March 2001 sampling, to 7.3, 9.2, 13.6 and 18.5 from an initial level of 7.0.
- Intervention effect Soil QT K decreased with KCl rate at the March 2002 sampling, to 5.5, 7.8, 8.1 and 8.5.
- Intervention effect The rate of K had only a small effect on initial soil Mg, Ca and Na QT levels.
- Intervention effect Pasture K content was significantly higher at the highest K rate than in the control.
- Intervention effect Increasing K rate significantly decreased pasture Na.
- Intervention effect Increasing KCl rate significantly increased the amount of leached K in Year 1, to 17.5 kg ha −1 at the highest rate versus 7.0 kg ha −1 in the control.
- Intervention effect Increasing KCl rate significantly increased leached chloride in Year 1, to 64.6–146.6 kg ha −1.
- Intervention effect Increasing KCl rate significantly increased leached Ca in Year 1, to 30.4–60.1 kg ha −1.
- Intervention effect Increasing KCl rate significantly increased leached Na in Year 2, to 59.4–74.1 kg ha −1.
- Intervention effect K rate had no significant effect on leached Mg, nitrate-nitrogen or sulphate-sulphur.
- Association Applying excess K fertiliser on allophanic soils to raise soil QT K above 7 is expected to reduce pasture uptake and the availability of Na to animals.