CAJ | 학술논문

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。
위제고잡교중도、재생도량계단산，다차시험기시비기술，결과표명，중도괄당감소기、얼비용작수（립）비，사기전기촉얼장얼，중기은장，군체괄중，후기개체건장，항역력증강，광합효솔화N비이용솔균제고。인차두、이계균교“중저조추시비법”현저증산，우기여수형교소적품충、중묘이재、혈식쌍주、괄당밀식화증시N비、중기증시K비등조시병용시효과경가。N소기、얼、수비비례위5∶2∶3적량계증산솔균고우기타삼시8충단항증산조시。기관건작용적시수（립）비，수시N총량증가이제고기소점비례，대량계총산적배합효응유호。수（립）비시기칙근거중기장세장상이정，일반의재잉수기혹제수기시용。
Fertilizing trials were conducted to research the yi eld increaseeffects of hybrid middle-season rice and ratooning rice.Results in dicated that using the decreased fertilizer in establishing and tillering t o booting stages can promote tillering quickly, grow steadiy in middle stage, in c rease resistance to stress and form proper tiller population and healthy plants in late stage. This fertilizing method can also advance photosynthetic rate and nitrogen utilization ratio, increase 1000-grain weight of main rice and rat o oning bud survival rate, promote ratooning bud growth, increase ratooning plants population and spikes, advance main and ratooning rice grain yield. This method s especially suited to the hybrid rice combinations charactered by small spike; While for the treatment transplanted with double seedling per hill, properly in creasing plant density and nitrogen utilization, applying potassium after mi ddle sta ge,the effect was more notable. When nitrogen was applied before transplanting( 50%), tillering （20％） and booting （30％）, the grain yield of main and r atooning rice was higher than those of other eight individual ratooning cultivat ing measures. Appling booting （or grain） fertilizer was the key factor in this fertilizing method, suitable fertilizing time was usually in booting or heading stage according to the growing conditions in middle stage.