頁籤選單縮合
題名 | 利用植被反射光譜特徵估測盤固草之化學組成分=Estimation of Chemical Components of Pangolagrass Forage from Canopy Spectral Characteristics |
---|---|
作者 | 張芳銘; 楊純明; 許福星; 洪國源; Chang, Fang-ming; Yang, Chwen-ming; Hsu, Fu-hsing; Hong, Kuo-yuan; |
期刊 | 中華農業研究 |
出版日期 | 20020900 |
卷期 | 51:3 2002.09[民91.09] |
頁次 | 頁1-11 |
分類號 | 434.4 |
語文 | chi |
關鍵詞 | 植被反射光譜; 光譜特徵; 盤固草; 多元直線複回歸分析; 化學組成分; Canopy reflectance spectrum; Spectral characteristics; Pangolagrass; Multiple linear regression analysis; Chemical component; |
中文摘要 | 本研究旨在利用近地面光譜遙測技術偵測值被反射光譜,探討盤固草(Digitaria decumbens Stent.)植被光譜特徵與粗蛋白質、中洗纖維、酸洗纖維間之關係,並試以建立估測迴避模式以評估應用於牧草品質檢測之可行性。根據相關強度分析結果,發現反射光譜之各波長反射比與化學組成分(粗蛋白質、酸洗纖維及中洗纖維)之相關並不一致,而大致均以大於740 nm之紅外線(光)波段之相關程度較高。據此各化學組成分分別篩檢出近紅外線波段8條波帶,進行多元直線複迴歸分析。顯示粗蛋白質可由1893、1332、1731及1837 nm等波長之反射比構成之四元直線複迴歸程式估算,其R²=0.293(P<0.0001);酸洗纖維可由1038及1663 nm等波長構成之二元直線複迴歸程式估算,其R²=0.484(P<0.0001);而中洗纖維則可由1450及2385 nm等波長構成之二元直線複迴歸程式估算,其R²=0.173(P<0.0001)。這些複迴歸模式之估測值與化學分析之實測值顯示近似於1:1的驗證結果,可據以利用於提供粗略估測或追蹤盤固草植被之化學組成分及其變異等用途。 |
英文摘要 | Ground-based remotely sensed canopy spectral data of hyperspectral resolution were acquired at the experimental field of Taiwan Livestock Research Institute. Hsinhua, to study the spectral characteristics of pangolagrass (Digitaria decumbens Stent) in associated with chemical components (crude protein, acid detergent fiber and neutral detergent fiber). From the results of correlation intensity analyses, there were varied correlation coefficients between spectral reflectance and content of chemical components along the measured wavelength domain (350-2500 nm). In general, reflectance of wavelengths greater than 710 nm in the infrared region had higher correlation with chemical components. Eight wavebands in the infrared were selected for each component to run the multiple linear regression analyses. It indicated that contents of crude protein (CP) may be expressed as a function of reflectance at 1893, 1332, 1731 and 1837 nm with coefficient of determination (R²) of 0.293 (P<0.0001). The contents of acid detergent fiber (ADF) and neutral detergent fiber (NDF) may be expressed as functions of reflectance at 1038 and 1663 nm and at 1450 and 2385 nm, with R² of 0.484 (P<0.0001) and 0.173 (P<0.0001) , respectively. It is suggested that the changes of chemical components of pangolagrass may be estimated and monitored by these regression models. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。