剑川县是云南省新疆核桃主要栽培区之一,但其实生繁殖多,品种混杂,不能适应当前核桃产业发展的需要,有必要进行优树选择。2008～2011年,对剑川县核桃进行选优调查,初步评选出优良单株5株,其坚果三径平均值3.89cm,平均壳厚1.18cm,平均粒重12.38g,平均仁重6.50g,平均出仁率47.94%,平均出油率为72.4%。 Jianchuan County is one of the main cultivated areas of Xinjiang walnut in Yunnan Province. However, its multiplication and variety are not suitable for the development of the current walnut industry. Therefore, it is necessary to choose the optimal tree. 2008 ~ 2011, Jianchuan walnut for optimal investigation, initially selected five excellent single plant, the average diameter of the three nuts 3.89cm, the average shell thickness of 1.18cm, the average grain weight 12.38g, the average kernel weight 6.50g , The average kernel rate 47.94%, the average oil yield was 72.4%.