【摘要】 以曲靖烟区主栽烤烟品种K326为材料,采用相关分析、通径分析和逐步回归分析的方法,探讨了烟叶的单叶重、长度、宽度、含梗率、平衡含水率与海拔、经度、纬度之间的相互关系。结果表明:在达到显著或极显著水平的相关性中,叶长与经度呈正相关,与纬度呈负相关;叶宽与经度呈正相关,与海拔呈负相关;单叶重与纬度呈负相关;含梗率与纬度呈正相关;平衡含水率与经度呈负相关;叶长受地理指标的影响最大,而纬度对烟叶物理性状的影响最大。地理指标对物理性状的影响以直接效应为主,间接效应为辅,海拔、经度、纬度之间有弱的交互作用。叶长、单叶重与海拔及经纬度的多元逐步回归方程达极显著水平且拟合度较好。更多还原

【Abstract】 Taking K326,a flue-cured tobacco cultivar widely planted in Qujing,as a sample,the relationship of single leaf weight,length,width,stem content,and equilibrium moisture content of tobacco leaf with altitude,longitude and latitude where the tobacco was planted was studied with correlation analysis,path analysis and stepwise regression analysis.The results indicated that leaf length significantly positively correlated with longitude and extremely significantly negatively correlated with latitude;the correlation of leaf width with longitude was significantly positive,while with altitude was extremely significantly negative;single leaf weight extremely significantly negatively correlated with latitude;stem content extremely significantly positively correlated with latitude;equilibrium moisture content extremely significantly negatively correlated with longitude.Of all the physical properties,leaf length was susceptible to altitude,latitude and longitude the most.Of all the geographic factors,the influence of latitude was higher than the other factors on physical properties.The geographic factors influenced physical properties of tobacco mainly by direct effects,and assisted by indirect effects.There existed weak interactions among altitude,latitude and longitude.The multiple stepwise regression equation of leaf length,single leaf weight versus altitude,latitude and longitude was of significant level and fitted pretty well.更多还原