Journal article : China Rice 2017 Vol.23 No.4 pp.147-150 ref.12
Abstract : In order to reduce the amount of nitrogen fertilizer and improve its use efficiency, the effects of ear fertilizer in different leaf age on yield and nitrogen use efficiency of indica rice was studied without the application of base fertilizer and tiller fertilizer. The results showed that, for 5 leaf stage (60%) and 3 leaf stage (40%) poured nitrogen fertilizer (T3, 120 kg/hm2.), 4 poured leaf stage (100%) nitrogen fertilizer (T4, 120 kg/hm2), 4 leaf stage (60%) and 2 leaf stage (40%) poured nitrogen fertilizer (T5, 120 kg/hm2), 5 poured leaf stage (100%) nitrogen fertilizer (T2, 120 kg/hm2). four times average application of nitrogen fertilizer (CK, 195 kg/hm2), the rice yields were 12.90, 12.74, 12.69, 12.32, 13.25 t/hm2, nitrogen contribution rate were 17.71%, 16.58%, 16.25%, 13.77%, 19.86%, and agronomic nitrogen utilization rate were 18.08. 16.73, 16.33, 13.26, 13.24 kg/kg, respectively. Compared with CK, the amount of nitrogen fertilizer of the treatment with 5 leaf stage (60%) and 3 leaf stage (40%) poured nitrogen fertilizer was reduced by 38.46%, but the grain yield and nitrogen use efficiency difference was not significant.
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