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- W3150985255 abstract "Total nitrogen(N) loss and ammonia volatilization from urea applied to flooded rice grown on a paddy soil in Zhejiang Province were measured by ^15N balance and micro-meteorological methods,respectively.Floodwater properties and ammonia loss from the circular plot were compared with those from the microplots.And the effectiveness of urease inhibitor,NBPT [N-(n-butyl) thiophosphoric triamide],was also tested Results showed that the total losses from urea broadcast and incorporated at transplanting (basal dressing) were similar with those from urea broadcast 12 days after transplanting (top-dressing)(51.5% and 48%,respectively,of applied N),and ammonia losses were low,the corresponding figures were 10.8% and 7.0% of applied N,respectively.Thus,denitrification was a much more important pathway of nitrogen loss than ammonia volatilization under the particular conditions.Addition of NBPT retarded urea hydrolysis,reduced pHs and ammoniacal nitrogen concentrations of floodwater for either the application of urea as basal or as top-dressing,but these effects were not translated into the reduction of total nitrogen loss.Floodwater pHs and ammonia loss in the microplots were apparently lower than those in the circular plot from urea applied as basal dressing;however,such differences were not found when urea was top-dressed.The frequently raining days occurred after top-dressing may be responsible for the insignificant effect of plot size on floodwater pHs and ammonia volatilization.It seems that the effects of phot size on ploodwater properties and ammonia loss mainly depend on weather conditions,in addition to the height and leaf area index of the crop." @default.
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- W3150985255 date "1992-01-01" @default.
- W3150985255 modified "2023-09-28" @default.
- W3150985255 title "Gaseous Loss of Nitrogen from Fertilizers Applied to a Paddy Soil in Southeastern China" @default.
- W3150985255 hasPublicationYear "1992" @default.
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