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[1]杨琴,蒲红梅,赵学春,等.3种人工草地不同植被覆盖度实地测量方法比较[J].应用与环境生物学报,2021,27(01):220-227.[doi:10.19675/j.cnki.1006-687x.2020.01045]
 YANG Qin,PU Hongmei,ZHAO Xuechun,et al.Comparison of different plant cover investigation methods for three artificial grasslands[J].Chinese Journal of Applied & Environmental Biology,2021,27(01):220-227.[doi:10.19675/j.cnki.1006-687x.2020.01045]
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3种人工草地不同植被覆盖度实地测量方法比较()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
27卷
期数:
2021年01期
页码:
220-227
栏目:
研究论文
出版日期:
2021-02-25

文章信息/Info

Title:
Comparison of different plant cover investigation methods for three artificial grasslands
作者:
杨琴蒲红梅赵学春王志伟程华董瑞陈玉连金宝成
1贵州大学动物科学学院 贵阳 550025 2贵州省草业研究所 贵阳 550006 3兰州大学生命科学学院 兰州 730000
Author(s):
YANG Qin1 PU Hongmei1 ZHAO Xuechun1 WANG Zhiwei2 CHENG Hua3 DONG Rui1 CHEN Yulian1 & JIN Baocheng1?
1 College of Animal Science, Guizhou University, Guiyang 550025, China 2 Guizhou Provincial Institute of Prataculture, Guiyang 550006, China 3 School of Life Sciences, Lanzhou University, Lanzhou 730000, China
关键词:
人工草地目估法样线法误差照相法植被覆盖度
Keywords:
artificial grassland visual estimation line interception error photographic method plant cover
DOI:
10.19675/j.cnki.1006-687x.2020.01045
摘要:
植被覆盖度是植被垂直投影面积占统计区域面积百分比;理想覆盖度实地测量方法耗时短,工具简单,结果准确,受人为因素影响小. 以结缕草(Zoysia japonica)、白三叶(Trifolium repens)和雀稗(Paspalum thunbergii)人工草地为研究对象,以照相法测量值为参考,比较样线法、目估法、样针法、点框架法、网格法1 × 1、网格法5 × 5、网格点法1 × 1和网格点法5 × 5等8种方法测量精度. 结果表明:样线法误差小于5%,耗时短,工具简单. 目估法误差大于样线法,适用于植被高度低且覆盖度较低或较高样方. 样针法误差大于样线法和目估法,误差受植被高度和茎叶硬度影响,适用于植被高度低且硬度较小样方. 点框架法、网格法和网格点法误差均较大,一般大于10%. 网格法误差受覆盖度和小网格边长影响,误差峰值出现在覆盖度接近65%的样方,误差随着小网格边长增加而增加. 8种方法测量值与照相法测量值均呈显著正相关(P < 0.05),因此对于类似人工草地,这些方法测量值可通过本文提供的拟合公式转化为真实值. 随着样方数量增加,8种方法误差均呈现出先降低后稳定趋势. 本研究推荐样线法作为类似人工草地覆盖度实地测量方法;未来应根据覆盖度、植被高度和硬度等特征选择适合的测量方法. (图4 表2 参46)
Abstract:
Plant cover is the percentage of the ground surface covered by vegetation material. An ideal plant cover investigation method should take minimum time, utilize easy-to-use field equipment, possess accurate results, and minimize interference from human operators. Three artificial grasslands, including Zoysia japonica, Trifolium repens, and Paspalum thunbergii, were explored in this study. The errors of eight investigation methods, including the line intercept, visual estimation, pin frequency, and point frame method, as well as the grid point method 1 × 1, and grid point method 5 × 5, grid method 1 × 1, and grid method 5 × 5, were compared for use in the three grasslands based on reference values acquired using the photographic method. The results showed that the line intercept method had errors of less than 5% and a low demand for field time and equipment. The visual estimation method had errors larger than the line intercept method; this method may be more suitable for short grasslands with very low or high plant cover. The pin frequency method had errors larger than the line intercept and visual estimation methods. The pin frequency method was mainly affected by the height and hardness of stems and leaves of plants, and is suitable for dwarf grasslands with low hardness. Most errors of the point frame method, grid point methods, and grid methods were greater than 10%. The errors of grid methods were affected by both plant cover and grid side length. The peak error of grid methods appeared on quadrats whose plant cover was approximately 65%, and the error increased with increasing grid side length. There were significant positive correlations (P < 0.05) between plant covers acquired by the eight investigation methods and those acquired by the photographic method, indicating that for similar artificial grasslands, the cover estimates of these methods could be transformed into the actual plant covers using the provided regression curves. With the increase in sampling quadrats, the errors decreased at first and finally reached a stable value. In summary, specific plant cover, height, and hardness characteristics of plants should be considered when choosing ground plant cover investigation methods in the future. This paper highlighted the line intercept method as a powerful technique for plant cover estimation of similar artificial grasslands.

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更新日期/Last Update: 2021-02-25