水、旱稻品种叶片光谱的初步研究

PRELIMINARY STUDY ON RADIANT SPECTRA OF THE LEAVES OF PADDY AND UPLAND RICE

本文研究了水、水旱稻叶片光谱特性（即吸收、反射和透射光谱），水旱稻在幼苗期，叶片的光谱特性在８００～２００ｎｍ波长区域基本相同，二者叶片叶绿素含量十分接近（水、旱稻平均值分别为４２５和４２８ｍｇ／ｇ）。然而，在抽穗扬花期，旱稻品种剑叶的吸收率比水稻高，而透射率比水稻低，反射率除５５０ｎｍ外，其他波长区域两者基本相同。而叶绿素含量旱稻比水稻近似高出一倍（水、旱稻平均值分别为０８６和１６８ｍｇ／ｇ）。

The characteristics of the radiant spectra(i.e.absorption,reflectance and transmission) of leaves of paddy and upland rice were studied.The experiment proves that the characteristics of the radiant spectra of the seedling leaves of paddy and upland rice is basically the same in the range of 200—800nm,and their chlorophyll content of the leaves is also quite near(the average values for paddy and upland rice are 425mg/g and 428mg/g,respectively).However,the absorption of the flag leaves of upland rice is higher and the transmission is lower compared to paddy rice in the headingflowering period,while the reflectance is almost the same except for 550nm.The chlorophyll content in the leaves of upland rice is approximate twice as that of paddy rice (the average values of paddy and upland rice are 086mg/g and 186mg/g,respectively).