COMPARATIVE EVALUATION OF CONTROLLED RELEASE FERTILISERS FOR NITRATE LEACHING

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dc.contributor.authorRaveendrakumaran B
dc.contributor.authorGrafton M
dc.contributor.authorJeyakumar P
dc.contributor.authorBishop P
dc.contributor.authorDavies C
dc.contributor.editorChristensen, C
dc.contributor.editorHorne, D
dc.contributor.editorSingh, R
dc.coverage.spatialMassey University
dc.description.abstractA lysimetric study was carried out with an objective of evaluating the leaching behaviour of different fertilisers on spinach growth on Manawatu sandy soil. The fertiliser treatments applied were urea, two controlled release fertilisers called ‘g’and ‘SmartN’ at the rates of 50 kg N/ha (50N), 100 kg N/ha (100N) and 200 kg N/ha (200N). The 200 kg N/ha urea application was made in 10 split doses at a rate of 20 kg N/ha in 7-day intervals, whereas 200N application of ‘g’ and ‘SmartN’ were made twice at a rate of 100 kg N/ha at the time of planting and six weeks after planting. The control treatment did not receive any fertiliser application (0N). The application of Urea and ‘g’ at all rates except ‘g’-50N produced significantly higher nitrate leaching losses (19.8 to 27.7 kgN/ha) compared to the control (9.1 kgN/ha), while SmartN at all rates produced no significant increase in nitrate leaching. The total nitrate leached per ton of dry matter production was significantly reduced by the application of N fertilisers compared to the control (135.1 kgNO3 - -N/MgDM). On an average, 16.4 kg NO3 - -N/MgDM was leached from the fertilised treatments. Dry matter production increased at 200N application rates with all three fertilisers, but urea-200N produced the highest dry matter yield of 2377 kg/ha. In conclusion, frequent split applications of urea (urea - 200N) increased dry matter yield thereby significantly reduced nitrate leaching.
dc.format.extent? - ? (6)
dc.identifier.citationpp. ? - ? (6)
dc.identifier.elements-id433270
dc.identifier.harvestedMassey_Dark
dc.identifier.urihttps://hdl.handle.net/10179/15516
dc.relation.urihttp://flrc.massey.ac.nz/workshops/20/paperlist20.htm
dc.rightsThe Author(s), Massey University
dc.sourceNutrient Management in Farmed Landscapes
dc.subjectControlled release fertilisers, leaching, lysimeter, nitrate, SmartN.
dc.titleCOMPARATIVE EVALUATION OF CONTROLLED RELEASE FERTILISERS FOR NITRATE LEACHING
dc.typeconference
pubs.confidentialFALSE
pubs.finish-date13/02/2020
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment
pubs.start-date11/02/2020
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