2种水培观叶植物叶面积回归测定

Leaf Area Measurement of Hydroponics Plants by Regression Equation Method

叶面积是计算水培植物净化室内甲醛、苯等有害气体的一个关键因子,其大小直接影响对污染物的吸收。以水培吊兰、山海带为材料,采用回归模拟分析方法,对叶长、叶宽、叶长/叶宽、叶长×叶宽、叶鲜重和叶干重等叶片特征与叶面积进行相关性分析。结果显示,对叶面积影响较大的有叶长、叶宽、叶长×叶宽、叶片鲜重和叶片干重5个变量。以叶片特征值为因变量,以叶面积(S)为应变量,采用逐步回归分析分别建立了吊兰和山海带叶面积线性回归方程,吊兰S=13.38017-6.16999L+71.95777D+51.69008P,山海带S=9.48452-191.70534W-2.63267F+46.55836D+71.77287P,表明吊兰、山海带叶面积回归模型预测效果好。

Leaf area is a key factor to calculate the indoor purification of harmful gases such as formalde‐hyde and benzene in hydroponic plants,it size directly affects the absorption rate of pollutants.Using hydro‐ponic plants of Chlorophytum comosum and Dracaena cambodiana as materials,the correlations between leaf length,leaf width,leaf length/leaf width,leaf length×leaf width,Leaf fresh weight,leaf dry weight and leaf area were analyzed by regression equation method.The results showed that the leaf length,leaf width,leaf length×leaf width,leaf fresh weight and leaf dry weight are significantly correlated with leaf area.With leaf traits as dependent variable and leaf area(S)as response variable,the leaf area linear regression equations of'Chlorophytum comosum'and'Dracaena'are established by stepwise regression analysis sepa‐rately.The most accurate power function equations of leaf area corresponding to Chlorophytum comosum and Dracaena cambodiana are S=13.38017-6.16999L+71.95777D+51.69008P and S=9.48452-191.70534W-2.63267F+46.55836D+71.77287P,meanwhile it verified that the leaf area regression mod‐els of the two hydroponics plants had good prediction effect.