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Nutrient loading on free range layer farms

Singh, Mini and Ruhnke, Isabel and de Koning, Carolyn and Drake, Kelly and Hinch, Geoff and Skerman, Alan (2016) Nutrient loading on free range layer farms. In: 27th Annual Australian Poultry Science Symposium, Sydney, New South Wales, Australia.

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Article Link(s): http://sydney.edu.au/vetscience/apss/documents/201...

Abstract

A considerable proportion of the dietary nutrients consumed by poultry are excreted in the manure. This becomes an important issue on free range farms, if manure and/or nutrients are not removed periodically from the range areas. The nutrients and trace elements in manure can accumulate in the soil and become toxic to vegetation, while also causing pollution of ground and surface water through leaching. Soil samples were collected from fourteen free range layer farms both on the range and control areas (with no exposure to poultry) to investigate comparative soil nutrient concentrations. Nutrient concentrations were also compared between fixed and rotational ranges and between farms having different bird densities. At each site, soil was collected from 10 sampling points, arranged diagonally in a grid across both the range and control areas. A sampling probe was used to collect soil from the top 10 cm depth. These were submitted for a standardised lab analysis (Apal Agricultural Laboratory, SA, Australia). Data was subjected to analysis of variance and means considered significant at P < 0.05.

Item Type:Conference or Workshop Item (Paper)
Business groups:Animal Science
Subjects:Animal culture > Poultry
Animal culture > Housing and environmental control
Animal culture > Feeds and feeding. Animal nutrition
Deposited On:21 Jul 2016 02:26
Last Modified:09 Jan 2017 23:57

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