基于叶片反射光谱估测水稻氮营养指数

徐浩聪,姚波,王权,陈婷婷,朱铁忠,何海兵,柯健,尤翠翠,吴小文,郭爽爽,武立权

Determination of Suitable Band Width for Estimating Rice Nitrogen Nutrition Index Based on Leaf Reflectance Spectra

XU HaoCong,YAO Bo,WANG Quan,CHEN TingTing,ZHU TieZhong,HE HaiBing,KE Jian,YOU CuiCui,WU XiaoWen,GUO ShuangShuang,WU LiQuan

表3 NNI在品种、生育期和氮肥处理下的方差分析

Table 3 Analysis of variance of NNI among varieties, nitrogen treatments, and growth stage, respectively

分组因子 Grouping factor 变异来源 Variation source 平方和 Sum of squares 自由度 df 均方 Mean square F值 F-value P值 P-value 氮肥处理 Nitrogen rate 组间 Between groups 2.643 4 0.661 31.745 0 组内 Within groups 1.561 75 0.021 总计 Total 4.203 79 品种 Variety 组间 Between groups 0.231 3 0.077 1.475 0.228 组内 Within groups 3.972 76 0.052 总计 Total 4.203 79 生育期 Growth stage 组间 Between groups 0.094 1 0.094 1.782 0.186 组内 Within groups 4.109 78 0.053 总计 Total 4.203 79