长宽法测定幼苗期烟草叶面积校正系数,本论文可用于幼苗论文范文参考下载，幼苗相关论文写作参考研究。
幼苗论文参考文献：
摘 要：叶面积是评价植株生长状况的重要指标,生产上往往通过测定烟草叶片长度和宽度,乘以经验校正系数0.6345,计算烟草叶面积.为验证该校正系数是否适合于幼苗期烟草叶面积的测定,选择了烟草幼苗期246个不同大小的叶片,对用扫描计算法、复印称重法和长宽法3种方法所测定的叶面积数据进行了方差分析和线性回归分析.结果表明：（1）应用文献报道的校正系数,长宽法所测定的幼苗期烟草叶面积,显著低于扫描计算法和复印称重法；（2）幼苗期不同大小叶片,依据扫描计算法和复印称重法（除叶面积<10cm2）所获得的长宽法校正系数间不存在显著差异；（3）扫描计算法和复印称重法所测定的幼苗期烟草叶面积,与采用校正系数修订后的长宽法所测定的叶面积相对误差分别小于1%和2%,相关系数分别为0.9963和0.9966.据此,认为长宽法校正系数应修订为0.7075,方可准确计算幼苗期烟草叶面积.
关键词：烟草幼苗期叶面积；校正系数；长宽法；扫描计算法；复印称重法
中图分类号：S572.04文章编号：1007-5119（2015）06-0013-04DOI：10.13496/j.issn.1007-5119.2015.06.003
Revision of the Length-width Method CorrectionCoefficient inMeasuring Leaf Area of Tobacco Plants at the Seedling Stage
ZHENG Fengjun1, HUA Nanjinqiu1, ZHANG Limeng2, LI Jiangzhou2, JI Sigui2, LIN Shan1*
（1. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China； 2. Extension Center of Tobacco Production Technology, Yuxi Tobacco Company, Yuxi, Yunnan 653100, China）
Abstract：Leaf area is an important indicator in evaluating plant growth, which is often measured by the so-called length-width method in practice. With this method, tobacco leaves’ length and width were measured and the leaf area was calculated by multiplication of the empirical correction coefficient 0.6345. However, it is rarely reported in the literature whether the coefficient is suitable in measuring tobacco leaf area at the seedling stage. 246 tobacco leaves were collected at the seedling stage and leaf areas were measured by three methods namely scanning calculation method, photocopy weighing method and length-width method. The results showed： （1） Using the empirical correction coefficient reported in the literature, leaf area measured by the length-width method was significantly lower than that measured by the scanning calculation method and the photocopy weighing method. （2） No significant difference was observed betweenthe length-width method revised coefficients obtained through the scanning calculation method and the photocopy weighing method on different sizes of leaves at tobacco seedling stages. （3） The relative errors were less than 1% and 2% respectively by comparisons of leave areas measured by the scanning calculation method and the photocopy weighing method with those measured by the length-width method using the revised correction coefficient. The correlation coefficients were 0.9963 and 0.9966, respectively. Accordingly, we believe that the correction coefficient of the length-width method should be revised as 0.7075 to calculate tobacco leaf areasaccurately at the seedling stage.
结论：关于幼苗方面的的相关大学硕士和相关本科毕业论文以及相关银杏树幼苗论文开题报告范文和职称论文写作参考文献资料下载。
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