【摘要】 采用灰色关联理论分析了１８个新玉米杂交种在旱作条件下的植株性状和群体生育指标．结果表明，适应性好的夏玉米杂交种在旱作条件下植株性状表现为生育期偏长，植株较高，茎基部粗壮，后期绿叶数多，穗粒数多，单穗较重，属于单株健壮的大穗类型．进一步分析与旱作玉米产量密切相关的群体生育指标，表现出吐丝至成熟期的持续日数对子粒产量的影响最大，实现单产６８００ｋｇ·ｈｍ^－２以上吐丝至成熟日数应在５０ｄ以上，占整个生育期的 ５０％左右；其次表现为灌浆期干物质积累量要高，且成熟时应维持适宜的叶面积指数．更多还原

【Abstract】 The plant properties and colony growth quality index about 18 new maize hybrids were studied with the grey system theory.The results showed that these better plant properties of maize hybrid fit in with dry-lang indicated the longer growth period,the higher plant, the stronger basic stem, the more number of green leaves in later stage, the more number of grains, the larger weight of single ear. They belonged to the large ear type. The colony growth index in close contact with the yield were mainly the duration from silk to mature. When the yield reached over 6 800 kg·hm ^-2 tar- get, the duration would be more than 50 days and take up 50% of the growing period. Secondly dry matter accumulation would be higher during milking stage and suitable LAI should be maintained in maturity.更多还原