摘要
基于对梨果形的分析,提出用椭圆及线性方程描述梨果实,由这些方程推导出计算梨果实体积的新公式.只需用游标卡尺测出果实纵径、横径、梗端果宽、萼洼深及最大横径与果顶间的长度,即可用新公式计算出果实体积.在两个品种上对新公式测算精度进行验证,其平均测算误差分别为3.92%和3.61%,其平均测算体积仅分别偏低2.3%和2.42%.这些结果也证实了椭圆及线性方程描述梨果实的可行性.国2,表1,参6.
Using the ellipical and linear equations ,we derived a new formula for estimation of pear fruit volume. With the measurements of longitudinal diameter, transverse diameter, width at the stalk end. recessed depth at the calyx end,and length between maximum width & lower extremity of pear fruit,the pear fruit volume was then calculated by the new formula. The prediction accuracy of new method was verified, the mean prediction errors of fruit volume of two cultivars were 3. 92% and 3.61%,respectively ;and their actual fruit volumes were only underestimated by 2. 3% and 2. 42% ,respectively. These results showed that it was correct to use ellipical and linear equations for depicting pear fruit.
出处
《农业系统科学与综合研究》
CSCD
北大核心
1999年第2期130-132,共3页
System Sciemces and Comprehensive Studies In Agriculture
基金
山东省科委资助课题
关键词
梨
果形
椭圆及线性方程
测定方法
体积公式
Pear,Fruit shape, Ellipical and linear equations, Estimation methad,Volume formula
