【摘要】 采用裂区设计,对大丰30、登海618、利民33、瑞普959、先玉335、郑单958等6个玉米品种,在6.0万,6.5万,7.0万,7.5万株/hm~2 4个种植密度下的农艺性状及产量进行研究。结果表明,各玉米品种单株叶面积和穗长随种植密度增加而减小,株高、穗位、秃尖长度随种植密度增加而增加;在6.5万株/hm~2密度条件下种植大丰30、先玉335、瑞普959,在7.0万株/hm~2密度条件下种植郑单958可以获得高产。更多还原

【Abstract】 The split plot design was adopted in a field biological experiment to study the agronomic characters and yields of 6 different maize varieties(Dafeng 30, Denghai 618, Limin 33, Ruipu 959, Xianyu 335, Zhengdan 958) and their correlated characteristics, under four planting densities(60 000, 65 000, 70 000, 75 000 plants/hm~2). The results showed that the leaf area of single plant and the ear length of all varieties decreased with the increase of planting density, but the plant height, the ear height and the barren ear tip of maize increased with the increase of planting density. For high yield, the study indicated that the optimum planting density of maize varieties Dafeng 30, Xianyu 335, Ruipu 959 was 65 000 plants/hm~2 and Zhengdan 958 was 70 000 plants/hm~2.更多还原