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为了研究核桃树根系空间分布特性,本文使用分层分段挖掘法对干旱区滴灌方式下核桃树根系总根长、根重、有效吸收根根长的空间分布规律进行了研究。研究表明:核桃树根系总根长水平方向主要分布在0~120 cm处,占其总分布的90.84%;垂直方向主要分布在0~90 cm处,占其总分布的78.75%。根重水平方向主要分布在0~30 cm处,占其总分布的52.49%;垂直方向主要分布在15~75 cm处,占其总分布的61.12%。有效吸水根根长在水平距离60 cm和垂直深度60 cm处为分布密集区。在距离树干水平距离60 cm和垂直深度60 cm附近的根区,应作为核桃树水肥管理的重点区域。
In order to study the spatial distribution characteristics of walnut tree roots, this paper studied the spatial distribution rules of total root length, root weight and effective root length of walnut roots under drip irrigation in arid area by using the hierarchical mining method. The results showed that the total root length of walnut tree root mainly distributed in the horizontal direction from 0 cm to 120 cm, accounting for 90.84% of the total distribution. The vertical distribution was mainly from 0 cm to 90 cm, accounting for 78.75% of the total distribution. The horizontal root distribution mainly distributes at 0-30 cm, accounting for 52.49% of the total distribution. The vertical distribution mainly distributes at 15-75 cm, accounting for 61.12% of the total distribution. Effective root length of water-absorbing roots in the horizontal distance of 60 cm and vertical depth of 60 cm at the distribution of intensive areas. The root zone near the horizontal distance of 60 cm and the vertical depth of 60 cm should be regarded as the key area for water and fertilizer management of walnut trees.