文献类型：期刊文献

英文题名：Capturing Maize Stand Heterogeneity Across Yield-Stability Zones Using Unmanned Aerial Vehicles (UAV)

作者：Shuai, Guanyuan[1] Martinez-Feria, Rafael A.[1] Zhang, Jinshui[2] Li, Shiming[1,3] Price, Richard[1] Basso, Bruno[1,4,5]

第一作者：Shuai, Guanyuan

通信作者：Basso, B[1];Basso, B[2];Basso, B[3]

机构：[1]Michigan State Univ, Dept Earth & Environm Sci, E Lansing, MI 48823 USA;[2]Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China;[3]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China;[4]Michigan State Univ, WK Kellogg Biol Stn, Hickory Corners, MI 49060 USA;[5]Michigan State Univ, Great Lakes Bioenergy Res Ctr, E Lansing, MI 48824 USA

年份：2019

卷号：19

期号：20

外文期刊名：SENSORS

收录：;EI(收录号：20194307576612);Scopus(收录号：2-s2.0-85073416506);WOS:【SCI-EXPANDED(收录号:WOS:000497864700094)】；

基金：This research was supported by the U.S. Department of Agriculture National Institute of Food and Agriculture (USDA-NIFA, grant no. 2015-68007-23133), the U.S. Department of Energy, Office of Science (grant no. DESC0018409) and Office of Biological and Environmental Research (grant no. DE-FC02-07ER64494), and Michigan State University AgBioResearch.

语种：英文

外文关键词：UAV; plant detection; distance estimation; field experiments; yield stability

摘要：Despite the new equipment capabilities, uneven crop stands are still common occurrences in crop fields, mainly due to spatial heterogeneity in soil conditions, seedling mortality due to herbivore predation and disease, or human error. Non-uniform plant stands may reduce grain yield in crops like maize. Thus, detecting signs of variability in crop stand density early in the season provides critical information for management decisions and crop yield forecasts. Processing techniques applied on images captured by unmanned aerial vehicles (UAVs) has been used successfully to identify crop rows and estimate stand density and, most recently, to estimate plant-to-plant interval distance. Here, we further test and apply an image processing algorithm on UAV images collected from yield-stability zones in a commercial crop field. Our objective was to implement the algorithm to compare variation of plant-spacing intervals to test whether yield differences within these zones are related to differences in crop stand characteristics. Our analysis indicates that the algorithm can be reliably used to estimate plant counts (precision >95% and recall >97%) and plant distance interval (R-2 similar to 0.9 and relative error <10%). Analysis of the collected data indicated that plant spacing variability differences were small among plots with large yield differences, suggesting that it was not a major cause of yield variability across zones with distinct yield history. This analysis provides an example of how plant-detection algorithms can be applied to improve the understanding of patterns of spatial and temporal yield variability.