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Soil phosphorus effects on ryegrass (Lolium perenne L.) production on a Hydrosol in Tasmania

Citation

Cotching, WE and Burkitt, LL, Soil phosphorus effects on ryegrass (Lolium perenne L.) production on a Hydrosol in Tasmania, New Zealand Journal of Agricultural Research, 54, (3) pp. 193-202. ISSN 0028-8233 (2011) [Refereed Article]


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Copyright Statement

Copyright 2011 The Royal Society of NewZealand The definitive published version is available online at: http://www.tandf.co.uk/journals

DOI: doi:10.1080/00288233.2011.591809

Abstract

Soil phosphorus (P) concentrations in excess of those required to maximise pasture production impose unnecessary costs on farmers and potentially increase the risk of P runoff to waterways. The relationship between soil available P concentration and pasture production was examined on an Oxyaquic Hydrosol. Mean annual pasture production ranged from 18,415 to 21,834 kg DM/ha over the 3-year sampling period. There was no significant difference in the annual DM production at Olsen P concentrations of 2381 mg/kg measured from the 075mm sampling depth. Results show that there was no increase in pasture production when soil Olsen P concentrations exceeded 23 mg/kg (075 mm). The optimum soil Olsen P ranges determined in the current study are well below the mean paddock concentrations previously measured in northwest Tasmania (54 mg/kg) and suggest that such high concentrations are not justified in terms of optimising pasture growth.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Crop and Pasture Nutrition
Objective Division:Environment
Objective Group:Land and Water Management
Objective Field:Farmland, Arable Cropland and Permanent Cropland Land Management
Author:Cotching, WE (Dr Bill Cotching)
Author:Burkitt, LL (Dr Lucy Burkitt)
ID Code:67528
Year Published:2011
Web of Science® Times Cited:5
Deposited By:Agricultural Science
Deposited On:2011-03-04
Last Modified:2012-05-23
Downloads:3 View Download Statistics

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