CAJ | 학술논문

[目的]构建重金属铅污染下的水稻地上部器官集特征与高光谱识别模型。[方法】以南粳44和两优培九2个水稻品种为材料，通过盆栽试验，研究了不同浓度铅污染下水稻地上部器官对铅的富集特征，以及冠层光谱特征和植株各器官铅含量的定量关系。[结果]2个水稻品种整株、茎、叶和穗各器官铅含量均随着铅污染处理浓度的增加而加大，且茎中含量最高；不同浓度铅污染胁迫下的水稻冠层反射光谱曲线在可见光红光波段也存在差异，随着铅处理浓度增大，光谱曲线反射值降低，去除包络线后归一化深度加大。通过构建NDVI（x）与水稻器官中铅含量的多种关系模型，比较了模型预测的显著陛，分别构建了适用于2个水稻品种各器官的铅胁迫遥感监测的预测模型，南粳44分别为y整株=2270．4x2-2292．8x＋577．35，Y茎=4260．9x5-4294x＋1077．8，Y叶=2780．8x^2-2777．9x＋690．71以及Y穗=309．31x-306．07x＋75．369；两优培九分别为Y0整株=524269e……-25557/x，Y茎=1E＋07e^-31.65x，y叶=2E＋07e^-34.056x，y穗=14320e^21.756x。[结论]地面高光谱遥感对水稻重金属铅污染及其胁迫水平有较好的响应，可通过水稻冠层光谱的差异性分析，实现水稻铅污染的快速、无损伤探测。
[목적]구건중금속연오염하적수도지상부기관집특정여고광보식별모형。[방법】이남갱44화량우배구2개수도품충위재료，통과분재시험，연구료불동농도연오염하수도지상부기관대연적부집특정，이급관층광보특정화식주각기관연함량적정량관계。[결과]2개수도품충정주、경、협화수각기관연함량균수착연오염처리농도적증가이가대，차경중함량최고；불동농도연오염협박하적수도관층반사광보곡선재가견광홍광파단야존재차이，수착연처리농도증대，광보곡선반사치강저，거제포락선후귀일화심도가대。통과구건NDVI（x）여수도기관중연함량적다충관계모형，비교료모형예측적현저폐，분별구건료괄용우2개수도품충각기관적연협박요감감측적예측모형，남갱44분별위y정주=2270．4x2-2292．8x＋577．35，Y경=4260．9x5-4294x＋1077．8，Y협=2780．8x^2-2777．9x＋690．71이급Y수=309．31x-306．07x＋75．369；량우배구분별위Y0정주=524269e……-25557/x，Y경=1E＋07e^-31.65x，y협=2E＋07e^-34.056x，y수=14320e^21.756x。[결론]지면고광보요감대수도중금속연오염급기협박수평유교호적향응，가통과수도관층광보적차이성분석，실현수도연오염적쾌속、무손상탐측。
[Objective] This study aimed to investigate the characteristics of lead accu- mulation in rice aboveground organs under lead pollution and construct hyperspectral identification models. [Method] Pot experiments were conducted to investigate the characteristics of lead accumulation in rice aboveground organs and the quantitative relationship between canopy spectral characteristics and plumbum （Pb） concentrations in various rice organs under different lead levels with experimental materials Nanjing 44 and Liangyoupeijiu. [Result] Pb contents in whole plants, stems, leaves and spikes of Nanjing 44 and Liangyoupeijiu were increasing with the raised Pb levels, Pb content was the highest in stems. Significant differences were observed in the wavelength band of red light in canopy reflectance spectra curves under various Pb stress levels. With the increasing of Pb stress level, the strength of spectral reflectance reduced, and the normalized value of reflectance after removing envelopes curved increased. Several types of relationship models between NVDI（x） and Pb con- tent in rice organs were constructed. By comparing the prediction significance of these models, optimal prediction models were constructed for Pb stress remote- sensing monitoring in various organs of Nanjing 44 and Liangyoupeijiu, respectively. Specifically, Pb contents in various organs of Nanjing 44 were defined as： Ywhole-plant= 2 270.4x^2-2 292.8x＋577.35, ystem=4 260.9x^2-4 294x＋1 077.8, Yleat=2 780.8x^2-2 777.9x＋ 690.71, yspike=309.31X^2-306.07X＋75.369; while for Liangyoupeijiu, ywhole-plant=524 269e^-25.557x, ystem=1E＋07e^-31.65x, yleaf=2E＋07e^-34.056x, yspike=14 320e^-21.756x.[Conclusion] The field hyperspectral remote-sensing responded fairly well to Pb stress of rice plants and the stress intensity. Therefore, fast and undamaging probe of Pb pollution of rice could be achieved by the difference analysis of rice canopy spectra.