干旱区不同灌溉方式下枣树根系分布特性研究

采用土钻取样和扫描分析法,对干旱区两年的滴灌和沟灌两种灌溉方式下的枣树根系分布进行了调查研究。结果表明:滴灌处理的总根长、吸收根根长、根尖数、分叉数以及根表面积和体积分别比沟灌提高了15.4%、13.9%、24.8%、39.7%、29.9%和47%,说明滴灌使根系增多,从而提高了枣树根系吸收水分和养分的能力。并用指数函数建立了枣树有效根长密度分布的二维模型,为干旱区枣树的滴灌技术改进提供依据。

Research on root distribution characteristics of jujube tree under different irrigation methods in arid area

The spatial distributions of jujube roots under two methods of drip irrigation and furrow irrigation in two years were researched by soil core and scanning methods in arid area.The results showed that the length of total roots and absorbing root、the number of root tips and forks、the root surface area and volume of root under the drip irrigation were 15.4%,13.9%,24.8%,39.7%,29.9% and 47% respectively which were larger than that under furrow irrigation.It explained that the drip irrigation could add roots.Thus the drip irrigation increased the ability of absorbing water and nutrient of jujube roots.And the 2D model of the spatial density distributions of effective root in length was established by the exponent function.It offered evidences for the improvement of drip irrigation technology in arid area.