干旱区滴灌核桃树有效吸水根系的分布与模拟研究  

Simulation of Effective Roots Distribution of Walnut Tree under Drip Irrigation Condition in Arid Area

作　　者：王磊[1] 马英杰[1] 赵经华[1] 洪明[1] 游磊[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052

出　　处：《节水灌溉》2013年第10期17-20,共4页Water Saving Irrigation

基　　金：新疆维吾尔自治区重大专项(201130103-1);十二五国家科技支撑项目(2011Bad29B05)

摘　　要：为了对核桃树根系吸水和核桃树SPAC系统的进一步研究,使用分层分段挖掘法利用EPSONTWAINPRO （32 bit）根系扫描仪和Delta-t scan根系分析系统对干旱区滴灌核桃树的有效吸水根系在不同土层深度的一维和二维分布特性进行了研究,并建立了水平和垂直方向上的一维有效根长密度函数.结果表明：干旱区滴灌核桃树有效吸水根系主要分布在水平0～120 cm范围内、垂直方向0～90 cm范围内,分别占总含量的90.65％和79.19％;核桃树有效吸水根系根长密度函数在水平方向遵从多项式函数分布、垂直方向遵从e指数函数分布,相关系数分布为0.932和0.839;有效吸水根系分布在水平距离60 cm和垂直深度60 cm处为密集区,应作为核桃树根区水肥管理的重点区域.In order to further study the water absorption characteristic of root and the SPAC system of walnut trees, this paper uses layered sublevel mining method, EPSONTWAIN PRO （32 bit） root scanner and Delta-t scan root analysis system to study the 1D and 2D distribution characteristic in different soil depth of effective water absorption root system of walnut trees under drip irrigation in arid areas. Meanwhile, 1D effective root-length density function in the horizontal and vertical directions is established. The results showed that the effective water-absorption root system of walnut tree under drip irrigation in arid area is mainly distributed in the scope of the horizontal 0-120 cm, vertical 0-90 cm, which is 90. 65% and 79.19%, respectively, of the total content. The effective root length density function complies with polynomial function distribution in horizontal direction and exponential function distribution in vertical direction, and the correlation coefficient is 0. 932 and 0. 839, respectively. The area in horizontal distance 60cm and the depth 60 cm is the concentration areas for effective root. It should be treated as the key water-fertilizer management areas of walnut tree root.

关 键 词：干旱区 核桃树 根系 分布函数 

分 类 号：P641.8[天文地球—地质矿产勘探]