摘要
以保定地区‘107杨’为研究对象,调查统计了2~6a生‘107杨’叶片形态特征数据;通过幂函数、二项式、标准S曲线等7种形式16个模型构建了‘107杨’单叶面积静态模型、单叶面积增长模型;采用最小二乘法对模型参数进行估计,利用相对误差、绝对误差、判定系数R2及其模型精度等指标来验证模型的预估能力,并主要分析了2a生‘107杨’全株叶片大小在空间的分布规律。结果表明:以长、宽乘积为自变量的单叶面积静态模型精确度最高,公式为:S=-0.000 6 X^2+0.780 7 X^(-1)0.673;距萌芽期74d、106d、138d、154d的不同发育时日,三级叶片分布较多,单叶面积为40cm^2左右;在距萌芽期74d、106d发育时日,一级叶片数量稳定,占总叶片比重3.9%;出叶速率在前期基本保持快速稳定,后期逐渐减退;以距芽萌动期的发育时日为自变量、叶面积为因变量,构建的单叶面积增长模型为:S=0.981t0.726 1。叶面积模型的构建为准确模拟冠层内光辐射传输的研究提供了可能,也为提高植物的生物产量进而提高经济效益打下坚实的基础。
‘107 poplar’ was studied in Baoding area, and the leaf morphological characteris tics of 2 to 6 years＇ poplar were recorded. The static model of leaf area and the leaf area growth model for ‘107 poplar＇ were constructed by power function, binomial, standard curve S curve and other functions. The least squares estimation was applied to the parameter estimate and relative error, residual, determination coefficient R2 and its model accuracy were used to verify the model＇s ability to estimate. The distribution of leaf size of 2 year old ‘107 poplar＇ plant in space was analyzed. The results indicated that the most accurate leaf area static model formula was S 0. 000 6 X2 ＋0. 780 7 X- 10. 673, which was a product of length and width as independent variables. In the four developmental stages of 74 d,106 d,138 d and 154 d, the leaves of the third series were distributed more and the area was about 40 cm2. At the two developmental days from the budding period of 74 d and 106 d,the number of first level leaves accounted for 3.9% of the total number of leaves. Leaf rate in the early to main rain a rapid and stable, late gradually diminished. The single leaf area growth model was constructed as the independent variable and the leaf area as the dependent variable. The model was S= 0. 981t0.7261. The construction of leaf area model provided the possibility to ac curately simulate the propagation of light radiation in canopy. It established a solid foundation for improving the biological yield of plants and improving economic efficiency.
作者
孙晓
李春友
牟洪香
赵雪
贺红月
SUN Xiao;LI Chunyou;MU Hongxiang;ZHAO Xue;HE Hongyue(College of Forestry,Hebei Agricultural University,Baoding 071000,China)
出处
《林业与生态科学》
2018年第3期300-305,共6页
Forestry and Ecological Sciences
基金
农村领域国家科技计划课题研究任务(2015BAD07B0506)
作者简介
孙晓（1991-），男，山东临沂人，在读硕士研究生，研究方向森林培育。;通讯作者：李春友（1967-），男，浙江江山人，博士，教授，硕士生导师，主要从事复合农林业研究。
