Theme 04: Soil Fertility and Plant Nutrition
Description
Phosphorus (P) fertilizer is required to sustain productive pastures in Australia, yet optimum P fertility is poorly defined. A large farmlet study involving 10 herds was established in 1995 to determine the relationship between milk production and pasture response to four different P fertilizer rates, at three stocking rates. Pasture growth significantly increased with increasing P fertilizer rate. Cumulative milk production from pasture over 4 years, was significantly affected by P fertilizer, but responses diminished with increasing P rate. The results from this study will enable a better targeting of P fertility levels for profitable milk production from temperate dairy pastures and minimise the environmental impact of excess P fertilizer use.
Citation
Gourley, C. J. P.; Awty, I.; O'Doherty, M.; and Aarons, S. R., "Phosphorus Fertilizer Requirements for Temperate Dairy Pastures and Milk Production in South Eastern Australia" (2021). IGC Proceedings (1993-2023). 10.
https://uknowledge.uky.edu/igc/19/4/10
Included in
Phosphorus Fertilizer Requirements for Temperate Dairy Pastures and Milk Production in South Eastern Australia
Phosphorus (P) fertilizer is required to sustain productive pastures in Australia, yet optimum P fertility is poorly defined. A large farmlet study involving 10 herds was established in 1995 to determine the relationship between milk production and pasture response to four different P fertilizer rates, at three stocking rates. Pasture growth significantly increased with increasing P fertilizer rate. Cumulative milk production from pasture over 4 years, was significantly affected by P fertilizer, but responses diminished with increasing P rate. The results from this study will enable a better targeting of P fertility levels for profitable milk production from temperate dairy pastures and minimise the environmental impact of excess P fertilizer use.
