复播玉米品种主要农艺性状与产量的相关分析

选用不同类型的夏玉米品种进行了种植比较,研究其在当地（阿拉尔）特定气候条件下的主要生长性状与产量性状之间关系,进而筛选出适合南疆夏种的玉米品种。结果表明：夏玉米产量与生育期长短显著相关,并且与穗部呈正相关的性状大小排列为单穗重〉穗粒数〉穗长〉百粒重〉双穗率,与生长形态呈正相关的性状大小排列为穗位高度〉空秆率〉株高。因此,在选择夏玉米品种时首先要考虑生育期,以保证能正常成熟为准,并应注意对穗重较高、穗粒数较多、穗长较长、穗位较低等性状的考察。早熟品种新玉29和新玉13号产量表现较好,可为南疆复播玉米品种,但应注意防止新玉29号的后期倒伏。

Correlation Analysis about Agronomic Traits and Yield of Multiple Cropping Maize Varieties

Different types of maize varieties were planted in Alar reclamation area and their major growth and yield characters were analyzed for the aim of a selecting summer corn varieties suitable for cultivation in the southern Xinjiang,the results showed that,growth period was significantly associated with grain yield. The positive correlation relationships between grain yield and spike characteristics ranged as,ear weight〉grain number 〉ear length〉 grain weight 〉double spike rate,the positive correlation relationship between grain yield and growth traits ranged as,ear height 〉empty stalk rate〉 plant height,so when choosing varieties of multiple cropping maize,the growth period should be considered first,and secondly,the ear characteristics such as grain weigh per ear,grain number per ear,ear length,and ear height,etc.,should also be inspected. Early maturing varieties Xinyu 29 and Xinyu 13,which have better yield performance,could be chosen as main multiple cropping cultivars in South Xinjiang,and for Xinyu 29,some cultivation measures should be taken to prevent the lodging.