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本文通过实测并采用叶片受光加权法获得水稻群叶光照率(R_j)及各层群叶的总光照率(R_s)。与理论计算法比较,本方法更接近实际的群叶光照度。实际测定表明,水稻群体边界群叶光照比率(A)与群体平均叶片倾斜角(?)之间、根据群体内光通量计算的消光系数(K)与根据群叶光照度计算的消光系数(K′)之间分别存在极显著的直线关系。因此,可以通过测定群体内光通量来推算水稻群叶的光照度,并可根据不同水稻类型得出以下二个经验方程:直立型水稻((?):70—90°) R_j 直(?)50e-(0.13+0.86K)F披斜型水稻((?):50—70°) R_j 披(?)67e-(0.13+0.86K)F
In this paper, the light irradiance (R_j) of rice leaves and the total light irradiance (R_s) of the leaves of each layer were obtained by field measurement and leaf light weighting. Compared with the theoretical calculation method, this method is closer to the actual group leaf illumination. The actual measurement showed that the extinction coefficient (K) and the extinction coefficient (K ’) calculated from the luminous flux of the group leaf were the highest among the groups (A) and the average leaf tilt angle Respectively, there is a very significant linear relationship between. Therefore, the luminous flux of rice leaf can be calculated by measuring the luminous flux in the population, and the following two empirical equations can be obtained according to different rice types: vertical rice ((?): 70-90 °) R_j straight 50e- (0.13 + 0.86K) F Phosphor Rice ((?): 50-70 °) R_j Phosphorus 67e- (0.13 + 0.86K) F