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中文摘要：
以“正红6号”、“隆单8号”、“川单428”3个不同株型的玉米品种为材料，通过大田试验在川中丘区套作条件下开展密度对不同株型玉米产量和品质影响的研究。结果表明，川中丘区耐密型玉米品种“正红6号”高产高淀粉含量所对应的密度水平为67500~75000株／hm2，最大叶面指数为4．20～4．33；中间型品种“隆单8号”适宜密度水平是60000-67500株／hm2，最大叶面积指数为4．13～4．37；稀植型品种“川单428”在密度为60000株／hm2，最大叶面积指数达4．47时可获取较高的产量和淀粉含量。按照套作原埋，耐密型品种“正红6号”更具有套作优势。
英文摘要：
Field experiment was conducted in the middle of Siehuan hilly basin under relay-cropping the effects of density on yield and quality of different maize plant type as Zhenghong 6, Nongdan 8 and Chuandan 428. The results showed that the, optimal planting density for high density tolerance maize varieties of Zhenghong 6 was from 67500 to 75000 plants/ha, LAI was from 4.20 to 4.33; half compact type maize varieties of Nongdan 8 was from 60000 to 67500 plants/ha, LAI was from 4.13 to 4.37 ; and for large-size spike maize varieties of Chuandan 428 was 60000 plants/ ha. LAI was from 4.47. According to principle of relay-cropping, it was better of compact type.
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