文献类型：期刊文献

中文题名：A video camera recording method for measuring terminal velocity of seed dispersal by wind

作者：Minghu Liu[1] Zhiming Xin[1] Zhi Su[1] Yingming Zhao[1] Xinle Li[1] Zhimin Liu[2] Mariano ACony[3] Wei Liang[2,4] Xuanping Qin[2,4] Jianqiang Qian[5] Xue Cui[6] Quanlai Zhou[2]

第一作者：刘明虎

机构：[1]Experimental Center of Desert Forestry,Chinese Academy of Forestry,1 Shiyan Lane,Tuanjie Road,Dengkou 015200,People’s Republic of China;[2]Institute of Applied Ecology,Chinese Academy of Sciences,72 Wenhua Road,Shenyang 110016,People’s Republic of China;[3]Instituto Argentino de Investigaciones de las Zonas Aridas-CONICET,CC.507,5500 Mendoza,Argentina;[4]University of Chinese Academy of Sciences,19 Yuquan Road,Beijing 100049,People’s Republic of China;[5]Henan Agricultural University,63 Nongye Road,Zhengzhou 450002,People’s Republic of China;[6]Station of Forest and Grassland Pest Control and Quarantine,Shenyang 110804,Liaoning Province,People’s Republic of China

年份：2021

卷号：32

期号：1

起止页码：81-90

中文期刊名：林业研究：英文版

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；

基金：the National Natural Science Foundation of China(41571270).

语种：英文

中文关键词：Acceleration height;Acceleration time;Settling tower;Aerodynamic behavior;Appendage structures

分类号：Q948

摘要：An accurate and convenient method is essential for measuring the terminal velocity of seeds dispersed by wind.Systematic and random errors produced by existing methods lower the accuracy and convenience in determining seed terminal velocity.In this study,a video camera was used to record the falling process of forty-one species of wind-borne seed with eight appendage structures and seven aerodynamic behaviors in a settling tower at a speed of 50 frames per second(fps).The videos were analyzed by Quick Time Player to determine seed acceleration height,acceleration time,and terminal velocity.The results showed that acceleration height and time,terminal velocity,and the diff erence between terminal velocity and descent velocity(DTD)increased with wing loading.Compared with dropping methods,the camera recording method eliminated the eff ect of acceleration and corrected seed terminal velocity.Based on wing loading,release heights were determined for accurate measurement of terminal velocity of diff erent seeds.This method,due to its inexpensive equipment,high accuracy,easy observation and operation,can be applied to measure the terminal velocity of wind dispersed seeds,and provides a promising method in exploring the dispersal process of seeds.