CAJ | 학술논문

通过设计不同的种植密度，研究了种植密度对耐密型玉米品种顺单6号群体结构、根系特征及产量的影响。结果表明，随着种植密度的增加，单株叶面积、透光率、茎粗、叶夹角和单株干重均呈下降的趋势，群体叶面积指数和株高则呈上升趋势；根系体积和干重均随种植密度的增加而下降，且玉米根系多数集中在0~20 cm土层中；随着种植密度的增加，穗长、穗粗、穗粒数、百粒重、秃尖和双胞率均呈下降趋势，产量呈抛物线趋势，以4.95~7.20万株/hm2的种植密度产量较高。这说明，耐密型品种可以在较低密度下，以增加单穗产量来提高总产，也可以在高密度下提高库容来增产。鉴于玉米实际生产管理的便利，建议耐密型品种顺单6号种植密度为4.95万株/hm2。
통과설계불동적충식밀도，연구료충식밀도대내밀형옥미품충순단6호군체결구、근계특정급산량적영향。결과표명，수착충식밀도적증가，단주협면적、투광솔、경조、협협각화단주간중균정하강적추세，군체협면적지수화주고칙정상승추세；근계체적화간중균수충식밀도적증가이하강，차옥미근계다수집중재0~20 cm토층중；수착충식밀도적증가，수장、수조、수립수、백립중、독첨화쌍포솔균정하강추세，산량정포물선추세，이4.95~7.20만주/hm2적충식밀도산량교고。저설명，내밀형품충가이재교저밀도하，이증가단수산량래제고총산，야가이재고밀도하제고고용래증산。감우옥미실제생산관리적편리，건의내밀형품충순단6호충식밀도위4.95만주/hm2。
Field experiments on high density tolerantm aize variety Shundan 6 were conducted to study the differentplanting density.The results show ed that its leaf area per plant, light transm ittance, stem diam eter, leaf angle, dry weight per plant decreased and its LAI, plant height increased along with the planting density increasing. Its root volume and root dry weight decreased along with the increasing of planting density and the most of root system concentrated in soil layer of 0~20 cm in depth. Its ear length, ear diam eter, kernel per ear, 100-kernel weight, bald tip and tw in rates increased along with the increasing of planting density, its yield follow ed parabolic trend, the density ofhigh yield appeared 49 500~72 000 plants/hm 2.The Shundan 6 and otherhigh density tolerantm aize varieties,could im prove the total yield by increasing a single ear yield under the low er planting density or by increasing sink capacity under the high planting density condition. But, in view of the convenience of corn production m anagem ent, it is recom m ended that the suitable planting density of the Shundan 6 should be 49 500 plants/hm 2.