CAJ | 학술논문

为快速、准确、无损地监测小麦长势和营养状况，对不同氮素处理下4个小麦品种的冠层高光谱信息进行分析，并进行了红边参数与农学组分的相关分析。结果表明，在同一氮肥条件下，同一品种小麦在不同生育期的冠层高光谱反射率差异明显，且在近红外波段的差异大于可见光波段。随着氮肥施用的增加，近红外反射率有明显升高的趋势，而可见光处反射率降低并呈单峰曲线，且随着施氮量的增加反射光谱的红边和绿峰分别发生红移、蓝移。在冬小麦红边参数中，红谷位置、最小振幅及绿峰位置与农学组分之间呈负相关，而其余各红边参数与农学组分之间呈极显著正相关；建立了基于红边振幅的各个组分之间的回归统计模型，且模型较为稳定。
위쾌속、준학、무손지감측소맥장세화영양상황，대불동담소처리하4개소맥품충적관층고광보신식진행분석，병진행료홍변삼수여농학조분적상관분석。결과표명，재동일담비조건하，동일품충소맥재불동생육기적관층고광보반사솔차이명현，차재근홍외파단적차이대우가견광파단。수착담비시용적증가，근홍외반사솔유명현승고적추세，이가견광처반사솔강저병정단봉곡선，차수착시담량적증가반사광보적홍변화록봉분별발생홍이、람이。재동소맥홍변삼수중，홍곡위치、최소진폭급록봉위치여농학조분지간정부상관，이기여각홍변삼수여농학조분지간정겁현저정상관；건립료기우홍변진폭적각개조분지간적회귀통계모형，차모형교위은정。
Using four wheat cultivars as materials, canopy spectral information under different nitrogen levels was studied. The agronomy components associated with red edge parameters were analyzed for quickly, acurately monitoring growth and nutritional status of wheat. The results showed that the canopy reflectance were different for different cultivars and growth stages in the same amount of nitrogen. The change was more great at near infrared bands than that of the visible lights. Reflectance at near infrared band increased clearly with the increase of nitrogen supply, whereas reflectance at visible band decreased and appeared a curve with one peak. When increasing nitrogen supply, red edge and green peak position of canopy reflectance spectra moved to direction of long wavelength (red light) and short wavelength (blue light), respectively. The correlations between REP amplitude and agronomic components were better than those between the other red edge parameters and agronomic components. The correlations between Lo, Lwidth and agronomic components were significantly negative. The correlations between other red edge parameters and agronomic components were significantly positive. The regression equations between red amplitude and agronomic components were established. Red edge parameters can provide an important basis for agricultural production by remote sensing means.