坡面径流调控措施对山地果园水土流失及面源污染物阻控效果研究

Control Effect of Slope Runoff Regulation Measures to Soil and Water Loss and Non-Point Source Pollutant of Hillside Orchards

针对山地果园水土流失及无机化肥大量投入导致面源污染日益加剧的问题,于2016—2018年在兴城市头道沟坡面径流观测场对果树梯田、台田、水平槽整地及果园生草、间作等径流调控措施的水土流失及面源污染物阻控效果进行了调查研究,其中果树梯田、台田、水平槽整地时间为2011年秋季,苗木栽植时间为2012年春季。研究结果表明:与对照无工程果园、果园清耕相比,径流调控措施均显著降低了山地果园的产流量、产沙量、全氮流失量和全磷流失量。

Aiming at the problems of soil and water loss of hillside orchards and large input of inorganic fertilizer resulting in increasing non point source pollutants especially N and P pollution,the paper investigated and studied the control effect of soil and water loss and non point source pollutants through runoff regulation measures,including orchard terrace,platform fields,leveling of horizontal groove,growing grasses and intercropping in orchards of Toudaogou slope runoff observation site in Xingcheng City during the period from 2016 to 2018.Of which,the time of orchard terrace,platform fields and leveling of horizontal groove was in the autumn of 2011 and seedling planting was in the spring of 2012.The outcomes show that comparing with the orchards without engineering and clean tillage,the runoff regulation measures have obvious ly reduced the runoff,sediment production and loss amount of total N and total P.