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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．
The gray correlation theory was used to analyze the plant traits and population fertility indexes of 18 new maize hybrids under the condition of dry cultivation. The results showed that the adaptability of summer maize hybrids in dry conditions, the performance of the plant characteristics of the longer growing period, higher plant stem base sturdy, late green leaf number, grains per spike, heavier, belonging to a single Sturdy big panicle type. Further analysis of the population growth indices closely related to the yield of dry maize showed that the continuous days from silking to maturing had the greatest impact on the grain yield, and the number of silking to maturity days of more than 6,800 kg · hm -2 per plant should be 50 days , Accounting for about 50% of the whole growth period; followed by the accumulation of dry matter during grain filling stage is high, and the appropriate leaf area index should be maintained at maturity.