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甘蔗叶型主要包括两个方面:叶片角度和叶面积大小。叶片角度分为4类,叶面积大小分为3类,它们都要受遗传因素控制。叶型不同,对光合作用和蔗产量的影响不同。随着叶位下降,叶片角度就更大。在整个生育期,直立型叶片品种的光合势都大于变斜型品种。通常,“宝塔型”植株最有利于光能在群体内合理地分配。相关分析表明:7～8且份的 LAI、单株叶面积、光合势以及+1叶角度与蔗产量的相关达显著水平。
Sugarcane leaf type mainly includes two aspects: leaf angle and leaf area size. Leaf angle is divided into four categories, leaf area size is divided into three categories, they are subject to genetic factors. Different leaf types have different effects on photosynthesis and crop yield. As the leaf position drops, the blade angle is even greater. Throughout the growth period, photosynthetic potential of upright leaf varieties were greater than the variable-type varieties. In general, “pagoda” plants are most conducive to the rational distribution of light energy within the population. Correlation analysis showed that LAI, leaf area per plant, photosynthetic potential and the angle of +1 leaf were significantly correlated with the yield of cane in 7-8 fractions.