甘蔗综合栽培技术群体中叶面积、光照度和产量的研究

采用正交试验设计，在２水平上对甘蔗综合栽培技术措施中５个因素的组合群体的叶面积指数（ＬＡＩ）、冠层相对光照度（ＲＩ）和蔗茎产量（Ｙ）进行研究。结果表明，处理组合间ＬＡＩ、ＲＩ和Ｙ都存在显著差异；ＬＡＩ主要受盖膜、品种新台糖１０和一次施肥的影响；ＲＩ主要受盖膜影响；Ｙ主要受益膜和品种新台糖１０影响；最优因素水平处理组合为Ｍ１Ｔ１Ａ０Ｖ２Ｂ０；另外，根据ＬＡＩ、ＲＩ和Ｙ的相关分析，Ｙ的增加主要是由于群体叶面积较大，从而有较大的光合面积，截获较多的太阳辐射能所致。

Study on Leaf-area, Illumination Intensity and Yield of Sugarcane Population under Different Combination of Cultivation Techniques

An experiment of orthogonality design,consisting of 5 factors and setting 2 levels for each factors, was conducted on sugarcane under field condition. The results indicated that the leaf-area index of crop (LAI), the relative illumination intensity of leaf cannopy (RI) and cane yield (Y) were significantly different among different combinations of factors and levels; LAI was mainly affected by covering plastic film, using variety ROC 10 and using one -time fertilizing, RI by covering plastic film, and Y by covering plastic film and using variety ROC10. The best combination of factors and levels should be M1T1A0V2B0, On the other hand, according to the correlation analysis between LAI, RI, Y, the increaase of Y can be attributed to the increase of LAI, which increases the area of photosythesis and intercepts more radiant energy of sunlight.