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- W2352072322 abstract "Field experiments were carried out to study the top dressing N uptake,accumulation,distribution and utilization rate in flue-cured tobacco using 15N tracing technique in two sites on yellow soil. When top dressing 15N applied in 5 weeks after transplanting( WAT),accumulation of 15N reached the peak value at the 13 WAT,and the accumulation amount of 15N were 16. 13 kg /hm2 and 15. 28 kg /hm2 in two sites,respectively in 17 WAT when the leaves was harvested. Ration of 15N,which came from top dressing fertilizer,were 16. 95% to 16. 51% ,and 15N utilzation rate were 51. 20% to 61. 73% in two sites,The top dressing 15N distribution at upper,middle,lower leaves and stem and flowers were 32. 30% to 32. 72% ,32. 68% to 31. 47% ,17. 65% to 17. 28% and 27. 22% to 26. 44% in two sites,respectively,with more than 60% of top dressing 15N accumulated in middle and upper leaves. Therefore, high nicotine contents on yellow soil were mainly resulted from more top dressing 15N absorbed,delaying 15N absorption of top dressing fertilizer and the high top dressing 15N use efficiency,as well as more fertilizer 15N concentrated in upper and middle leaves." @default.
- W2352072322 created "2016-06-24" @default.
- W2352072322 creator A5045019377 @default.
- W2352072322 date "2010-01-01" @default.
- W2352072322 modified "2023-09-23" @default.
- W2352072322 title "ACCUMULATION,DISTRIBUTION AND UTILIZATION OF TOP DRESSING N-FERTILIZER BY ~(15)N TRACER METHOD IN FLUE-CURED TOBACCO GROWING ON YELLOW SOILS" @default.
- W2352072322 hasPublicationYear "2010" @default.
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