CAJ | 학술논문

以早熟矮秆耐密品种辽单565为试材，研究了在较高种植密度下继续增加密度对玉米干物质积累、光合特性和产量的影响。结果表明，随着密度的增大，单株干物质地上和地下部分均下降；叶面积指数先升后降，82500株／hm2处理下最高；单株功能叶片光合速率和叶绿素含量递减。测产结果表明，82500株／hm2处理下产量最高，达14364．0 kg ／hm2；穗长、穗粗、穗粒数、穗粒重、百粒重、出籽率与产量呈正相关，秃尖长与产量呈负相关。
이조숙왜간내밀품충료단565위시재，연구료재교고충식밀도하계속증가밀도대옥미간물질적루、광합특성화산량적영향。결과표명，수착밀도적증대，단주간물질지상화지하부분균하강；협면적지수선승후강，82500주／hm2처리하최고；단주공능협편광합속솔화협록소함량체감。측산결과표명，82500주／hm2처리하산량최고，체14364．0 kg ／hm2；수장、수조、수립수、수립중、백립중、출자솔여산량정정상관，독첨장여산량정부상관。
Used Liaodan 565 as the experimental material,effects of plant density on dry matter accumula-tion,photosynthetic characters and yield in maize were studied.The results indicated thatwith the density in-creased,ground and underground parts of dry matter were both to decline,LAI fell after rose,which was the largest in 82 500 plants /hm2 ,Pn and SPAD tended to decrease.Results of yield data showed that the optimal density of Liaodan565 was 82 500 plants /hm2 ,and the max yield was 14 364.0 kg /hm2 .There was a positive correlation between the yield and ear length,ear diameter,grains per spike,grain ear weight,100-seeds weight,seed yield percentage.There was a negative correlation between the yield and bare top length.