發(fā)布時(shí)間：2018-06-21 09:36

  本文選題：油菜 + 生長(zhǎng)期　； 參考：《湖南農(nóng)業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年06期

【摘要】：測(cè)定了直播和移栽油菜的苗期、抽薹期、花期、盛花期和角果期的冠層光譜,構(gòu)建了比值光譜植被指數(shù)(RSI)和歸一化光譜植被指數(shù)(NDSI)。為了獲得區(qū)分直播和移栽的最佳RSI和NDSI,利用降采樣法和精細(xì)采樣法相結(jié)合的受試者工作特征(ROC)圖尋找油菜生長(zhǎng)期光譜的敏感波長(zhǎng),直播和移栽油菜各時(shí)期RSI和NDSI的最敏感波長(zhǎng)分別為:苗期(458 nm,511 nm)和(433 nm,517 nm);抽薹期(997 nm,501 nm)和(990 nm,510 nm);花期(1 235 nm,1 180 nm)和(1 235 nm,1 180 nm);盛花期(478 nm,396 nm)和(484 nm,416 nm);角果期(1 073 nm,1 037 nm)和(1 092 nm,1 024 nm)。用敏感波長(zhǎng)下的2種植被指數(shù)為特征,以最近鄰法為分類器的定性識(shí)別模型,結(jié)果花期的區(qū)分效果最好,最大約登指數(shù)分別為0.941 7和0.945 0。
[Abstract]:The canopy spectra of seeding stage, bolting stage, flowering stage and pod stage of direct seeding and transplanting rapeseed were measured, and the ratio spectral vegetation index (RSI) and normalized spectral vegetation index (NDSI) were constructed. In order to obtain the best RSI and NDSIs for differentiating direct seeding from transplanting, the RSI and NDSIs were used to find the sensitive wavelength of the growing spectrum of rape. The most sensitive wavelengths of RSI and NDSI in each stage of direct seeding and transplanting rape are 458nmnmH511nmM at seedling stage and 517nm / nmb of 433nmnmnmnm1, respectively; 517nmm) and 510nmm in bolting stage; 1 235nm1 180nmm) and 1 235nmm at flowering stage; 478nmm396nm) and 484 nm416nmm in flowering stage respectively; 1073 nmm in pod stage. Nm 1 037 nm) and 1 092 nm 1 024 NM. With the characteristic of 2 planting cover index under sensitive wavelength and the nearest neighbor method as the classifier, the best distinguishing effect of flowering was obtained. The maximum Jordan index was 0.941 7 and 0.945 0, respectively.
【作者單位】： 湖南農(nóng)業(yè)大學(xué)理學(xué)院/農(nóng)業(yè)數(shù)學(xué)建模與數(shù)據(jù)處理研究中心;南方糧油作物協(xié)同創(chuàng)新中心;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(31501227,11571103) 湖南省科技重大專項(xiàng)(2014FJ1006) 湖南省科學(xué)技術(shù)廳重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2015JC3098) 湖南省教育廳重點(diǎn)項(xiàng)目(15A083) 湖南農(nóng)業(yè)大學(xué)大學(xué)生科技創(chuàng)新基金項(xiàng)目(2016ZK32)
【分類號(hào)】：S565.4;TP391.41

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