西藏林芝地区核桃物候特征的研究

[目的]对西藏林芝地区的核桃进行物候和生长节律的研究,为西藏良种核桃的选育与开发利用提供参考。[方法]对西藏林芝地区典型的核桃进行了营养生长物候、生殖生长物候和根系生长物候的观测研究。[结果]营养生长物候期,试验点核桃芽膨大期和萌芽期时间相差不大;生殖生长物候期,洞嘎镇最早,其次是东如村和公仲村,然后是里龙乡,通麦村最晚。果实生长动态变化方面,就横径和纵径而言,果实横径变幅大小为：通麦村〉洞嘎镇〉里龙乡〉公仲村〉东如村,果实纵径变幅大小为：通麦村〉公仲村〉洞嘎镇〉里龙乡〉东如村;根系生长物候期,核桃根系开始活动期与芽萌动期相同,3月下旬出现新根,6月中旬7月上旬、9月中旬10月中旬出现2次生长高峰,11月下旬停止生长。[结论]该结果揭示了西藏地区核桃物候特征的初步规律,填补了西藏在该研究领域的空白。

Study on the Phenology Characteristics of Juglans regia L. in Linzhi Area of Tibet

[Objective] The research aimed to study the phenology and growth rhythm of walnut in Linzhi of Tibet and provide reference for the breeding,development and utilization of Juglans regia L.in Tibet.[Method]The vegetative phenology,reproductive phenology and root growth phenology of typical Juglans regia L.in Linzhi of Tibet were observed.[Result]During the vegetative growth,the swelling period and germination period of Juglans regia L.in experimental sites had little difference.In reproductive growth phenology,Dongga Town was the first,the next was Dongru and Gongzhong,followed by Lilong,Tongmai was the latest.From the aspect of the fruit growth dynamics,as for the horizontal diameter and longitudinal diameter,the amplitude size of fruit diameter was Tongmai> Dongga> Lilong> Gongzhong> Dongru;The longitudinal diameter amplitude size was Tongmai> Gongzhong> Dongga> Lilong> Dongru.In the root growth phenology,the beginning activity stage of walnut root was the same as the bud germination stage.New roots occurred in late March.There were two growth peaks from mid-June to early July and form mid-September to mid-October.It stopped the growth in late November.[Conclusion] The results revealed the primary laws of phenological characteristics of walnut and filled the blank field of walnut in Tibet.