盛果期枣树根系空间分布规律研究  

Spatial distribution characteristics of jujube (Ziziphus jujuba Mill.) roots during full fruiting period

作　　者：郭光华[1,2] 李宏[2] 李建贵[1] 杨婵婵[2] 程平[2] 

机构地区：[1]新疆农业大学林学与园艺学院,乌鲁木齐830052 [2]新疆林业科学院,乌鲁木齐830000

出　　处：《南方农业学报》2013年第1期111-115,共5页Journal of Southern Agriculture

基　　金：林业公益性行业科研专项项目(201004085-1)

摘　　要：【目的】研究盛果期枣树根系的空间分布规律，为枣树的田间水肥管理提供理论依据。【方法】采用剖面挖掘和分层取样的方法，利用WinRHIZO Pro2010a根系分析系统对漫灌条件下盛果期红枣吸收根（根径＜2 mm）的空间分布进行分析。【结果】根系在水平方向上（0~425 cm）随着树干水平距离的增加而减少；在垂直方向上（0~160 cm）表现出随土层深度增加呈先增多后减少的趋势。根系根长密度最密集的区域在水平距离0~125 cm和垂直深度0~80 cm的区域，根系表面积密度最密集的区域在水平距离0~175 cm和垂直深度0~90 cm区域。【结论】水平距离0~200 cm和垂直深度0~70 cm以内土层是红枣田间水肥管理的重要区域，根长密度、表面积密度占全根的百分比均在80.00%以上，土壤质地条件是影响根系分布的一个重要因素。【Objective】This study researched the spatial distribution characteristics of jujube （Ziziphus jujuba Mill.） roots during full fruiting period in order to provide theoretical basis for water fertilizer management in jujube fields.【Method】Adopting the profile mining method and the stratified sampling method， the spatial distribution of jujube absorbing roots （root diameter〈2 mm） during full fruiting period was analyzed using the WinRHIZO Pro2010a analysis system.【Result】The row roots in the horizontal direction（0-425 cm） decreased as the trunk horizontal distance increased. In the vertical direction （0-160 cm）， the row roots first increased then decreased as the soil depth increased. Areas with the most intensive root length density were located at the horizontal distance of 0-125 cm and the vertical depth of 0-80 cm， and the area with the most concentrated root surface area density was located at the horizontal distance of 0-175 cm and the vertical depth of 0-90 cm. 【Conclusion】Soil within the horizontal distance of 0-200 cm and the vertical distance of 0-70 cm was considered to be important jujube water fertilizer management area since the root length density and surface area density of the soil were all above 80.00%. Also， the soil texture was one of the important factors affecting roots distribution.

关 键 词：红枣 吸收根 空间分布 根长密度 根表面积密度 

分 类 号：S667.1[农业科学—果树学]