本文選題：最大羧化速率 + 高光譜遙感��； 參考：《生態(tài)學(xué)報(bào)》2017年03期

【摘要】：濕地植被生產(chǎn)力和固碳潛力的研究是全球碳循環(huán)和全球變化的熱點(diǎn)研究問題。濕地植被的光合能力能夠指示其生長的健康狀態(tài)。最大羧化速率是重要的植被光合參數(shù)之一,對(duì)精確模擬濕地植被光合作用和氣體交換模型中的固碳過程具有重要的作用。以內(nèi)蒙古烏梁素海湖泊濕地為研究區(qū),進(jìn)行了蘆葦葉片光合參數(shù)和光譜的測量。蘆葦葉片最大羧化速率(V_(cmax))數(shù)值是基于Farquhar光合作用模型,從光合測量獲取的A-C_i曲線計(jì)算并校正到25℃得到的。分別基于bootstrap PLSR模型、單波段和高光譜植被指數(shù)(包括簡單比值指數(shù)SR和歸一化差值指數(shù)ND),構(gòu)建濕地蘆葦葉片最大羧化速率(V_(cmax))估算模型�；诟吖庾V遙感圖像HJ-1A HSI,采用ND高光譜指數(shù)中具有較高V_(cmax)估算精度的入選波段702和756 nm,獲取研究區(qū)濕地蘆葦最大羧化速率空間分布圖。研究結(jié)果表明,濕地植被光譜特征和高光譜植被指數(shù),可用于估算濕地蘆葦V_(cmax),其中最高精度產(chǎn)生于基于bootstrap PLSR模型的建模方法(R~2=0.87,RMSECV=3.90,RPD=2.72),ND高光譜指數(shù)的V_(cmax)估算精度高于SR高光譜指數(shù)的估算精度;從獲取的V_(cmax)空間分布圖上提取估算值,其與測量值對(duì)比,存在較好的相關(guān)性(R~2=0.80,RMSE=4.74)。
[Abstract]:The study of wetland vegetation productivity and carbon sequestration potential is a hot issue in the global carbon cycle and global change. The photosynthetic capacity of wetland vegetation can indicate the healthy state of its growth. The maximum carboxylation rate is one of the important photosynthetic parameters of vegetation and plays an important role in accurately simulating the carbon sequestration process in wetland vegetation photosynthesis and gas exchange models. The photosynthetic parameters and spectra of Reed leaves in Wuliangsuhai Lake Wetland of Inner Mongolia were measured. The maximum carboxylation rate of Reed leaves was calculated and corrected to 25 鈩，

本文編號(hào)：1955315