为提高杂交中稻、再生稻两季单产 ,多次试验其施肥技术 ,结果表明 ,中稻适当减少基、蘖肥用作穗 (粒 )肥 ,使其前期促蘖壮蘖 ,中期稳长 ,群体适中 ,后期个体健壮 ,抗逆力增强 ,光合效率和N肥利用率均提高。因此头、二季均较“重底早追施肥法”显著增产 ,尤其与穗型较小的品种、中苗移栽、穴植双株、适当密植和增施N肥、中期增施K肥等措施并用时效果更佳。N素基、蘖、穗肥比例为 5∶2∶3的两季增产率均高于其他参试 8种单项增产措施。起关键作用的是穗 (粒 )肥 ,随施N总量增加而提高其所占比例 ,对两季总产的配合效应愈好。穗(粒 )肥施期则根据中期长势长相而定 ,一般宜在孕穗期或齐穗期施用 In order to increase the yield of hybrid mid-season rice and ratoon rice, the fertilization techniques were tested many times. The results showed that medium-sized rice was reduced base and tillering fertilizer was used as spike (grain) fertilizer, which promoted early tillering and tillering, medium- , The late individual robust, increased resistance, photosynthetic efficiency and N fertilizer utilization rate increased. Therefore, the first and second seasons are significantly higher than the “heavy bottom early fertilizer application method” significantly increased, especially with the smaller spike varieties, transplanting seedlings, planting double plants, appropriate close planting and application of N fertilizer, medium-term increase in K fertilizer Measures and use better. N yield, tillering and spike fertilizer ratio of 5: 2: 3 were higher than those of other eight measures of individual yield increase. The key role is the spike (grain) fertilizer, with the total amount of N increase and increase its proportion, the better the combined effect of the two seasons. Spike (grain) fertilizer period is based on the medium-term growth looks set, generally should be applied at booting or heading stage