文献类型：期刊文献

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

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

第一作者：刘明虎

通信作者：Zhou, QL[1]

机构：[1]Chinese Acad Forestry, Expt Ctr Desert Forestry, 1 Shiyan Lane,Tuanjie Rd, Dengkou 015200, Peoples R China;[2]Chinese Acad Sci, Inst Appl Ecol, 72 Wenhua Rd, Shenyang 110016, Peoples R China;[3]Consejo Nacl Invest Cient & Tecn, Inst Argentino Invest Zonas Aridas, CC 507, RA-5500 Mendoza, Argentina;[4]Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China;[5]Henan Agr Univ, 63 Nongye Rd, Zhengzhou 450002, Peoples R China;[6]Stn Forest & Grassland Pest Control & Quarantine, Shenyang 110804, Liaoning, Peoples R China

年份：2021

卷号：32

期号：1

起止页码：81-90

外文期刊名：JOURNAL OF FORESTRY RESEARCH

收录：;Scopus(收录号：2-s2.0-85077528665);WOS:【SCI-EXPANDED(收录号:WOS:000574060700001)】；

基金：This study was supported by the National Natural Science Foundation of China (41571270).

语种：英文

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

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 difference between terminal velocity and descent velocity (DTD) increased with wing loading. Compared with dropping methods, the camera recording method eliminated the effect of acceleration and corrected seed terminal velocity. Based on wing loading, release heights were determined for accurate measurement of terminal velocity of different 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.