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我们曾讨论了单位土地面积水稻植株的叶绿素含量与绿光(G)、红光(R)及近红外光谱反射率因子之间的关系,本文将对利用光谱反射率资料推测水稻植株含氮量的可能性。松岛指出,当水稻抽穗期植株体内的含氮量超过干重的1.25％时,就不必追施氮肥。这表明氮素水平在水稻栽培措施中是个重要的特征值。松崎等人指出,整个生长季,一品种上位三叶的含氮量与用色谱判断的叶色等级之间的相关系数为
We discussed the relationship between the chlorophyll content per unit area of rice plants and the reflectance factors of green (G), red (R) and near infrared spectra. In this paper, we speculated that using spectral reflectance data to estimate the nitrogen content of rice plants The possibility of. Matsushima pointed out that when the nitrogen content of rice plants at heading stage exceeds 1.25% of the dry weight, nitrogen fertilizer need not be chased. This indicates that the nitrogen level is an important characteristic value in rice cultivation measures. Matsuzaki pointed out that the correlation coefficient between the nitrogen content of the upper clover of a variety and the leaf color grade judged by chromatography was