CAJ | 학술논문

以玉米杂交种先玉335、郑单958、吉单35为试材,在67500株/hm~2种植密度下,分析高产玉米品种产量结构特点及形成机制.结果表明:先玉335产量显著高于郑单958和吉单35.群体粒数多是玉米高产的关键,百粒重高是玉米高产的保证.受精花丝数多、败育粒数少、叶面积指数高且持续期长、子粒形成关键期干物质积累多、单粒干物质供应充足是玉米高产的生理基础.研究还发现,群体粒数和粒重的协调有赖于源库水平的协调.
이옥미잡교충선옥335、정단958、길단35위시재,재67500주/hm~2충식밀도하,분석고산옥미품충산량결구특점급형성궤제.결과표명:선옥335산량현저고우정단958화길단35.군체립수다시옥미고산적관건,백립중고시옥미고산적보증.수정화사수다、패육립수소、협면적지수고차지속기장、자립형성관건기간물질적루다、단립간물질공응충족시옥미고산적생리기출.연구환발현,군체립수화립중적협조유뢰우원고수평적협조.
Characteristics of yield components and formation mechanism of high-yield maize hybrids were stud-ied,using maize hybrids Jidan35, Zhengdan958 and Xianyu335 ,under planting density of 67 500 plants/ha.The re-suits showed that the yield of Xianyu335 was the highest.Population grain number was the main contributor to high yield, and high 100-grain weight was the guarantee for high yield.The physiological bases for high yield were more fertilized filaments/ear,few aborted kernels/ear, high leaf area indices (LAI), high leaf area duration (LAD), more dry matter production at the key stages of yield formation and more dry matter supply to kernels.More population grain number and high grain weight were dependent on the coordinated source-sink relationship.