浙江引种日本栗生物学特性和结实性状调查

Biological and Fruit Bearing Characteristics of Introduced Castanea crenata in Zhejiang

2007年对浙江省奉化市引种的5个11年生日本栗品种生物学特性和结实性状进行了调查观测，结果表明日本栗各品种在奉化的年生长周期为239-248 d，与魁栗相比前后差异约5 d，品种间成熟期差异明显；日本栗各品种的树势紧凑，结果枝和果前梢粗而短，每结果枝雄花数量为9.2-10.9条，雌花数量为1.8-2.8簇，比例合理，总苞纵、横径分别为9.2-10.3 cm和6.9-8.6 cm，显著大于魁栗；单果重为19.5-22.4 g，比魁栗重7.14%-23.08%，其中丹尺和利平2个品种单株产量比魁栗高13.53%和16.55%，丰产性良好。

Observations were made on biological and fruit bearing characteristics of five varieties of introduced Castanea crenata of 11 years old in Fenghua,Zhejiang province in 2007.The result showed that the annual growth period of the tested varieties was 239 - 248 days,about five days different from C.mollissima var.Kuili.There were significant differences in mature period among the tested varieties.C.crenata had characteristics of larger and shorter fruit bearing shoot and shoot ahead of fruit.On average,there were 9.2 - 10.9 male flowers and 1.8 - 2.8 female flowers on one fruit bearing shoot,forming a 9.2 - 10.3 longitudinal diameter and 6.9 - 8.6 transversal diameter,both larger than that of C.mollissima var.Kuili.The average single fruit weight of C.crenata varieties was 19.5 - 22.4g,which was 7.14% - 23.08% heavier than that of C.mollissima var.Kuili.Single plant yield of two varieties of C.crenata that were Danchi and Liping was 13.53% and 16.55% higher than of C.mollissima var.Kuili,respectively,indicating good fruit bearing quality of the vatieties.