CORRELATION BETWEEN SOIL PHOSPHORUS TESTS FAILED UNDER FIELD CONDITIONS IN SOUTHEAST AUSTRALIA
Phosphorus (P) is an essential element for turfgrass growth and a potential environmental pollutant.Soil P levels in excess of sufficiency for plant growth are therefore undesirable.This study was conducted to establish correlations between soil P availability tests that are used for the testing of soils used for turfgrass culture.Testing was conducted on soils from an experimental pot trial,and soils collected from golf course greens and fairways.The tests included the Colwell,Bray 2,and Sports Turf Research Institute (UK) test.Correlations between test results from soils taken from the experimental pots were strong (r2 from 0.781 to 0.95).Correlations between test results from soils taken from golf course greens and tees were much weaker (r2 from 0.09 to 0.64).Fractionation revealed a wide variation in forms of P in the soils from field sites.Alkali-soluble P was dominant in many putting green soils,attributed to high usage of soluble iron for cosmetic purposes.Acid-soluble P forms were dominant in many fairway soils,attributed to historic use of superphosphate.The results indicate that soil P test results from field sites could prove unreliable unless considered in the context of the management history of the site and the forms of soil P present.
acid extractant alkaline extractant correlation phosphorus soil test P
James Hull Peter M. Martin
Independent Turfgrass Consulting,Sydney,NSW2006,Australia Faculty of Agriculture and Environment,The University of Sydney,Sydney,NSW 2006,Australia
国际会议
The 12th International Turfgrass Research Conference(第十二届国际草坪学术大会)
北京
英文
825-827
2013-07-14（万方平台首次上网日期，不代表论文的发表时间）