Hostname: page-component-7b9c58cd5d-9klzr Total loading time: 0 Render date: 2025-03-15T13:53:22.270Z Has data issue: false hasContentIssue false

Phosphorus fertilizer for nitrogen-fertilized dairy pastures. 3. Milk responses to a dietary phosphorus supplement

Published online by Cambridge University Press:  01 September 1997

R. G. WALKER
Affiliation:
Queensland Department of Primary Industries, Kairi Research Station, PO Box 27, Kairi, Queensland 4872, Australia
T. M. DAVISON
Affiliation:
Queensland Department of Primary Industries, Mutdapilly Research Station, MS 825, Peak Crossing, Queensland 4306, Australia
W. N. ORR
Affiliation:
Queensland Department of Primary Industries, Mutdapilly Research Station, MS 825, Peak Crossing, Queensland 4306, Australia
B. A. SILVER
Affiliation:
Queensland Department of Primary Industries, Kairi Research Station, PO Box 27, Kairi, Queensland 4872, Australia
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Dairy cows grazing a tropical grass pasture fertilized with 300 kg N/ha and with a 7-year history of phosphorus fertilizer at either 0 or 45 kg P/ha were given a P supplement in a 2 × 2 factorial experiment at Kairi Research Station, Queensland, Australia. Milk yield, fat-corrected milk yield, yields of milk fat, protein and lactose, and protein content of milk were increased (P<0·05) with P fertilizer. There was no response in milk yield or any component of milk to the provision of a P supplement. It is concluded that the milk response recorded in this experiment was due to P fertilizer leading to additional pasture on offer and increased pasture intake. The lack of response to additional P in the form of a supplement indicates that these pastures can supply adequate P for cows producing 20 kg/day even after 8 years without P fertilizer.

Type
Research Article
Copyright
© 1997 Cambridge University Press