5个美国山核桃优良品种开花等性状比较

The Comparison of Flowering Characters of 5 Pecan Varieties

为解决安徽地区美国山核桃品种少、产量低等问题，连续13年对引种的美国山核桃实生品种对比观察。筛选出‘安农1号’等5个优良适生品种。并对这5个品种的新枝及叶萌发生长节律、雌雄花开花物候、花期长短等特性进行观测分析。结果表明，5个品种新枝平均长度差异达到6．5cm，叶平均长度差异3．3cm；枝梢、叶、雄花序生长量最大均为温度最高日期；5个品种雄花盛花期持续时间相差不大；‘安农5号’雌花盛花期持续10天，比其他4个品种长3～5天；‘安农1号’、‘安农3号’、‘安农5号’均为同时型品种，‘安农2号’为雄先型品种，‘安农4号’为雌先型品种。

To solve the problems of Anhui region pecan less variety and low yield. Comparison of the introduced pecan seedling varieties for 13 years was studied, screened out ＇Annong 1＇ and other 4 suitable varieties. Then the authorobserved and analyzed the new branches and leaves on germination and growth rhythm, male and female flowers flowering phenology, flowering duration and other characteristics of these 5 varieties. The results showed 5 species differences in the average length of new branches reach 6.5 cm, leaves the average difference in length 3.3 cm. The largest amount of branches, leaves and male inflorescences when the highest temperature date. 5 varieties of male flowering duration had smaller differenee. The female flowers of ‘Annong 1＇ bloom lasted 10 days, longer than the other 4 varieties of 3 to 5 days. Female flower and maleflower of ‘ Annong 1＇, ‘ Annong 3＇ and ‘ Annong 5＇ opened at the same time, while female flowers of ‘Annong 2＇ opened first, male flowers of ‘ Annong 4＇ opened first.