本文選題：光譜特征 + 沙生植被　； 參考：《生態(tài)與農(nóng)村環(huán)境學(xué)報(bào)》2017年07期

【摘要】：采用Field Spec 4便攜式光譜儀對科爾沁5種典型沙生植被進(jìn)行光譜測量,并對其特征進(jìn)行提取分析,結(jié)果表明:(1)黃柳(Salix flavida)、冷蒿(Artemisia frigida)、麻黃(Herbal ephedrae)、差巴嘎蒿(Artemisia halodeudrou)和小葉錦雞兒(Caragana microphylla)5種典型沙生植被的光譜形態(tài)大致相同,但又略有差異。在600~690和750~900 nm波段處差異較大,根據(jù)光譜差異波段和導(dǎo)數(shù)光譜參數(shù)可以區(qū)分冷蒿、麻黃和差巴嘎蒿,但不能區(qū)分黃柳和小葉錦雞兒。(2)隨著植被生長期的推移,"綠峰"位置先向藍(lán)光方向偏移再向紅光方向偏移,黃柳、冷蒿、麻黃和小葉錦雞兒4種沙生植被光譜對應(yīng)的"紅邊"均具有明顯的"雙峰",而差巴嘎蒿光譜"紅邊"區(qū)的"雙峰"現(xiàn)象不甚明顯;黃柳、麻黃和小葉錦雞兒光譜的"紅邊"區(qū)出現(xiàn)明顯的"紅移"現(xiàn)象,黃柳和冷蒿的"紅邊"區(qū)在9月末出現(xiàn)"藍(lán)移"現(xiàn)象,而冷蒿和差巴嘎蒿的"紅邊"位置呈微弱向藍(lán)光方向偏移態(tài)勢,"紅移"現(xiàn)象并未出現(xiàn)。5種典型沙生植被在8、9月均具有"紅邊平臺",其中,差巴嘎蒿和小葉錦雞兒在日期09-27均持續(xù)處于"紅邊平臺"位置。(3)5種典型沙生植被在紅光波段處的吸收明顯比藍(lán)光波段處強(qiáng)烈,吸收深度也比藍(lán)光波段處深。隨著植被的生長,5種沙生植被的吸收深度和吸收峰面積變化趨勢相同。在夏季,麻黃變化比其他4種植被更明顯。同時(shí),對不同生長時(shí)期5種沙生植被歸一化植被指數(shù)(NDVI)進(jìn)行分析可知,NDVI的變化趨勢與吸收深度大體相同,與吸收峰面積的變化趨勢相反。(4)不同生長時(shí)期的"紅邊"參數(shù)、"吸收"參數(shù)和時(shí)序NDVI數(shù)據(jù)識別植被的效果明顯好于其他參數(shù)。在對研究區(qū)植被進(jìn)行分類時(shí),應(yīng)選擇春季(植被生長初期)和秋季中晚期(植被生長衰退期)的多時(shí)相遙感影像進(jìn)行聯(lián)合解譯會取得更好的效果。
[Abstract]:The Field Spec 4 portable spectrometer was used to measure the 5 typical sandy vegetation of Horqin, and the characteristics were extracted and analyzed. The results showed that: (1) Huang Liu (Salix flavida), Artemisia (Artemisia FRIGIDA), Ephedra (Herbal Ephedrae), poor Artemisia (Artemisia halodeudrou) and Caragana microlois (Caragana microphylla) 5 typical sand The spectral morphology of the vegetative vegetation is roughly the same, but there is a slight difference. The difference between the 600~690 and 750~900 nm bands is great. According to the spectral difference band and derivative spectral parameters, the Artemisia Artemisia, ephedra and Artemisia are distinguished, but there is no distinction between the Yellow willow and the Caragana microphylla. (2) the position of "green peak" is first shifted to blue light as the growth period of vegetation goes on. The "red edge" of 4 species of yellow willow, Artemisia, ephedra and Caragana have obvious "Shuangfeng", while the "Shuangfeng" phenomenon in the "red edge" area of the spectrum is not very obvious, and the "red shift" phenomenon of yellow willow, ephedra and Caragana in the "red edge" area of the Yellow willow, ephedra and Caragana is obvious, and the red edge of the Yellow willow and the Artemisia Artemisia. The "blue shift" phenomenon appeared at the end of 9 month, while the "red edge" position of Artemisia Artemisia and Artemisia Artemisia was slightly shifted to blue light. The "red shift" phenomenon did not show the "red edge platform" of typical.5 species of sandy vegetation on the 8,9 month, and the date 09-27 of the Artemisia Artemisia and the Caragana microphylla were always in the "red edge platform" position. (3) 5 kinds of typical sand. The absorption of the raw vegetation in the red light band is stronger than the blue light band, and the absorption depth is deeper than the blue light band. With the growth of the vegetation, the absorption depth and the absorption peak area of the 5 kinds of sandy vegetation are the same. In summer, the change of Ephedra is more obvious than the other 4 plants. At the same time, 5 kinds of sandy vegetation were normalized at different growth stages. The analysis of vegetation index (NDVI) shows that the change trend of NDVI is the same as that of absorption depth. (4) the effect of "red edge" parameter, "absorption" parameter and time series NDVI data in different growth period is better than that of its parameter. The joint interpretation of multi temporal remote sensing images in the early stage of growth and the middle and late autumn (vegetation growth decline) will achieve better results.

【作者單位】： 內(nèi)蒙古農(nóng)業(yè)大學(xué)水利與土木建筑工程學(xué)院/內(nèi)蒙古自治區(qū)水資源保護(hù)與利用重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金重點(diǎn)國際(地區(qū))合作研究項(xiàng)目 重點(diǎn)項(xiàng)目和面上項(xiàng)目(51620105003,51139002,51479086) 內(nèi)蒙古水利科技項(xiàng)目 教育部科技創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃(IRT13069) 科技部重點(diǎn)領(lǐng)域創(chuàng)新團(tuán)隊(duì)項(xiàng)目(2015RA4013) 內(nèi)蒙古自治區(qū)草原英才產(chǎn)業(yè)創(chuàng)新創(chuàng)業(yè)人才團(tuán)隊(duì) 內(nèi)蒙古農(nóng)業(yè)大學(xué)寒旱區(qū)水資源利用創(chuàng)新團(tuán)隊(duì)項(xiàng)目(NDTD2010-6)
【分類號】：Q948;TP79

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