《Table 2 Total N uptake, internal N-use efficiency, and N requirements in hybrid rice transplanted w

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《No-tillage effects on grain yield and nitrogen requirements in hybrid rice transplanted with single seedlings: Results of a long-term experiment》

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1) LSD values are for the comparison of years for each tillage method.**represents significance at the 0.01 probability；ns denotes nonsignificance.

In this study，a representative hybrid rice cultivar Liangyoupeijiu transplanted as single seedlings produced an average grain yield of 9.42 t ha–1 across tillage methods and years（Table 1）.This average yield is very close to those yields（9.57 and 9.51 t ha–1）obtained from the same cultivar when transplanted with double seedlings in the same location（Huang et al.2011c；Jiang et al.2016）.This change in cultural practice cuts seed costs substantially as having minimum number of seedlings per hill（one）reduces seed rate minimizes seed costs，an important factor in the profitability of hybrid rice production.