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Impact of phosphorus fertiliser on tropical pasture legume production

Macor, J. P., Peck, G. A., Newman, L., Taylor, B. and McLean, A. (2022) Impact of phosphorus fertiliser on tropical pasture legume production. In: Proceedings of the 20th Agronomy Australia Conference, 2022, 6 - 10 February 2022, Toowoomba Qld.

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Abstract

The application of phosphorus (P) fertilisers during legume establishment can substantially increase yields, however the P requirements of many tropical legumes has not been defined. A trial was established on low P soils near Wandoan in southern Queensland to investigate the effect of P fertiliser on tropical legume production during establishment and the three years post sowing, with early results reported in this paper. The trial consisted of single cultivars of three tropical legume species (Desmanthus leptophyllus, Desmanthus virgatus and Stylosanthes seabrana) with five rates of P fertiliser applied. No significant difference between the three species was identified, suggesting the three legumes responded to P fertiliser similarly. Across the three species a 20% increase in yield was achieved with P application. The critical soil P level, defined as 95% of maximum yield, ranged between 12 and 14 mg/kg. The addition of P fertiliser on low P soil during tropical legume establishment results in greater legume productivity which is expected to increase livestock production.

Item Type:Conference or Workshop Item (Paper)
Business groups:Animal Science
Additional Information:Open access
Keywords:Stylosanthes, Desmanthus, Colwell P
Subjects:Agriculture > Agriculture (General) > Agriculture and the environment
Agriculture > Agriculture (General) > Soils. Soil science > Soil and crops. Soil-plant relationships. Soil productivity
Agriculture > Agriculture (General) > Agricultural meteorology. Crops and climate
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Agriculture > Agriculture (General) > Fertilisers
Animal culture > Cattle
Animal culture > Rangelands. Range management. Grazing
Animal culture > Feeds and feeding. Animal nutrition
Agriculture > By region or country > Australia > Queensland
Deposited On:25 Feb 2022 05:12
Last Modified:25 Feb 2022 05:33

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