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以叶面积仪实测的魔芋 (AmorphophallusrivieriDurieu)叶面积为参照 ,分别获得了用叶片上各小裂片的长径(L)与短径 (W)计算叶面积的校正值 (K1=0 .6 3)和用叶片上 3个羽片的长度 (D)与羽片的开张度 (E)计算叶面积的校正值 (K2 =0 .5 2 ) ;得到了用L和W计算的单株叶面积为 0 6 3∑ni=1 LiWi(n为小裂片总数 ) ,用D和E计算的单株叶面积为 0 5 2∑3i=1 DiEi(3为叶片的羽片数 )。经分析检验 ,用K1法计算的叶面积与实际叶面积的差值多在 10 %以下 ,可基本满足生产上叶面积测定的精度要求。而用K2 法计算的叶面积与实际叶面积的差值较大 ,尤其是生育前期 ,但其方法简便 ,如生产上需快速测定叶面积而所需精确度不高时可以采用
Taking the leaf area of AmorphophallusrivieriDurieu measured by the leaf area meter as the reference, the leaf area correction (K1 = 0.63) was calculated by the long diameter (L) and short diameter (W) And the correction value (K2 = 0.52) of the leaf area was calculated by the length of the three pinnules (D) and the opening degree of the pinnules (E). The leaf area per plant calculated by L and W was 0 6 3Σni = 1 LiWi (n is the total number of small lobes). The leaf area per plant calculated by D and E is 0 5 2 Σ 3i = 1 DiEi (3 is the number of leaf vanes). After analysis and test, the difference between leaf area calculated by K1 method and actual leaf area is more than 10%, which can basically meet the precision requirements of the determination of the area of upper leaves. However, the difference between leaf area calculated by K2 method and actual leaf area is larger, especially in early growth period, but the method is simple and convenient. For example, when the leaf area needs to be measured quickly in production and the accuracy required is not high,