Spectral Characteristics of Aboveground Biomass, Plant Coverage, and Plant Height in Italian Ryegrass (Lolium multitlorum L.) Meadows
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- ITANO Shiro
- Experimental Farm, Faculty of Agriculture, Gifu University
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- AKIYAMA Tsuyoshi
- Institute for Basin Ecosystem Studies, Gifu University
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- ISHIDA Hiromi
- Experimental Farm, Faculty of Agriculture, Gifu University
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- OKUBO Tadakatsu
- Faculty of Urban Economics, Nasu University
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- WATANABE Nariyasu
- Land Ecology, Graduate School of Agricultural Science, Tohoku University
Bibliographic Information
- Other Title
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- イタリアンライグラス草地における草量, 植被率および自然草高の分光特性
- Spectral Characteristics of Aboveground Biomass,Plant Coverage,and Plant Height in Italian Ryegrass(Lolium multiflorum L.)Meadows
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Abstract
To investigate the suitability of a hand-held spectroradiometer for estimating grassland productive functions such as aboveground biomass, plant coverage and plant height, spectral characteristics were measured in three Italian ryegrass (Lolium multiflorum L.) meadows in Gifu prefecture. Spectral reflectance in six wavelengths ranging from the visible to the near infrared was measured, and nine vegetation indices were calculated from combinations of spectral data. Leaves in a meadow strongly absorbed blue and red sunlight in the chlorophyll absorption ranges, while strongly reflecting light in the near infrared range. Soil surface conditions as well as vegetation conditions affected these spectral characteristics. It was suggested that grassland productive functions show specific spectral characteristics depending on their location and growth stage. The correlation and regression analyses showed that the aboveground biomass (g DM/m^2) was linearly related to the Difference Vegetation Index with r^2=0.95 and the K-Vegetation Index with r^2=0.95, while plant coverage (%) was linearly related to the Normalized Difference Vegetation Index with r^2= 0.97. The results suggest that spectral characteristics are suitable for rapidly qualifying vegetation in grassland.
Journal
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- Japanese Journal of Grassland Science
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Japanese Journal of Grassland Science 46 (1), 1-9, 2000
Japanese Society of Grassland Science
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Keywords
Details 詳細情報について
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- CRID
- 1390001205754889600
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- NII Article ID
- 110003849937
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- NII Book ID
- AN00194108
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- ISSN
- 21886555
- 04475933
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- NDL BIB ID
- 5422324
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed