土壤与作物2024，Vol.13Issue(3)：269-279,11.DOI:10.11689/sc.2023090301
黑土区坡耕地横坡改垄的位置准确性
Position accuracy of changing longitudinal ridge to contour farming in sloping farmland of black soil region
摘要
Abstract
The black soil region in Northeast China is China's vital commercial grain base.However,severe soil erosion on slope farmland poses a significant threat to this region's potential for grain production.The transition from traditional downslope ridging to contour ridging(briefly referred to as"contour ridging")is one of the primary measures for preventing soil erosion on slope farm-land.By integrating high-precision Digital Elevation Models(DEMs)and designing standards,ArcMap can plan the orientation and position of contour ridges and estimate the reduction in soil erosion on slope farmland after contour ridging was implemented.There-fore,the degree of positional discrepancy between the designed and implemented contour ridges directly affects the effectiveness of contour ridging and the precision in evaluating its impacts and benefits.This study aims to assess the position accuracy of contour ridges designed by ArcMap using high-precision DEMs obtained from unmanned aerial vehicles(UAV).For this purpose,three fields where contour ridging had already been implemented were selected in the Sanjiang Plain of Heilongjiang Province,China.CORS RTK was used to precisely measure the XYZ coordinates of verification points along implemented ridges.Those measured point coordinates were compared with the designed ridgeline positions to analyze the positional discrepancies between the designed and implemented ridgelines.The results indicated that:(1)The average slope gradient along the contour ridgelines measured in the field(0.5°-0.6°)was relatively close to that along the ridgelines designed using ArcMap(0.6°),and the elevation changes along most of the contour ridgelines showed a pattern of being higher in the middle and lower on both sides.(2)The positional offset between most of the measured and designed ridgelines was less than the width of a single ridge(1.3 m),and the median offset was one-third of the width of a single ridge.(3)The positional offset caused by the movement of ridging machinery could be greater than the offset resulting from the baseline setup,and measured points with larger positional offsets were often located at the edges of the plots as well as turns of the ridgelines.Therefore,during the designing ridgelines process,the turns should be made as smooth as possible.During ridging,reducing the speed at these turns to minimize errors and maintain the accuracy of the ridging path was recommended.关键词
黑土区/水土保持/横坡垄/设计垄线/位置准确性Key words
black soil/soil and water conservation/contour farming/ridge designing/location accuracy分类
农业科技引用本文复制引用
李浩,孙芳莲,李同国,段连臣,宋春雨..黑土区坡耕地横坡改垄的位置准确性[J].土壤与作物,2024,13(3):269-279,11.基金项目
中国科学院战略性先导科技专项(XDA28100403) （XDA28100403）
聊城大学博士科研启动基金(318052031) （318052031）
聊城大学大学生创新创业训练计划项目(CXCY2023042). （CXCY2023042）
