槟榔叶片Ca、Mg含量变化对产量、生长年限、黄化病的影响

Dynamics of Ca and Mg by Betel Leaves in Different Growth Conditions

采用田间调查与实验室分析相结合,以海南不同产量、不同生长年限、正常结果与黄化槟榔叶片为实验材料,分析不同产量水平、正常结果与黄化槟榔叶片Ca,Mg含量以及不同生长年限槟榔叶片Ca,Mg含量变化情况。结果表明,槟榔叶片Ca,Mg含量随着槟榔产量降低呈下降趋势,Ca含量下降幅度较大。低产组槟榔叶片Ca比高产组的下降了约37.2%,而Mg下降了约19.8%。黄化组(重)和黄化组(轻)槟榔叶片Ca含量比高产量组降低了57.8%和44.9%。而比低产量分别下降了32.0%和12.3%,黄化组(重)槟榔叶片Ca含量比黄化组(轻)的下降了23.4%。黄化组(重)和黄化组(轻)槟榔叶片Mg含量比高产量组的降低了30.2%和35.0%。而比低产量的分别下降了13.0%和18.9%,黄化组(重)槟榔叶片Ca含量比黄化组(轻)下降了6.9%。不同年限槟榔叶片的Ca含量差异不显著,除了高产组槟榔叶片Ca含量随着槟榔年限有所下降,其他产量组随着槟榔产量无明显变化。不同年限槟榔叶片的Mg含量差异不显著,但不同产量组槟榔叶片Mg含量随着槟榔年限有所下降。

The leaves were collected from normal fruit-bearing betel in different production levels and different growth years and those of yellow leaf disease for the experimental materials,by combination of a field investigation and laboratory analysis,to explore the content dynamics of Ca,Mg of the normal betel leaves of Hainan in different yield level and different growth years and the ones with yellow leaf disease.The results showed that Ca,Mg contents of the betel leaf decreased with yield decline,and Ca content decreased greatly.Compared with high-yield group,the Ca content of betel leaves in Low-yield decreased by about 37.2 %,while Mg decreased by about 19.8 %.Ca contents of betel leaf in severe yellow leaf disease and gentle yellow leaf disease group all were lower than that in the high yield group,with 57.8 % and 44.9 %,respectively.Compared with low-yield group,the Ca content of severe yellow leaf disease and gentle yellow leaf disease group decreased 32.2 % and 12.3 %,respectively.And the Ca of severe yellow leaf disease group was 23.4 % lower than that of gentle yellow leaf disease group.The Mg contents of betel leaf in severe yellow leaf disease and gentle yellow leaf disease group all were lower than that in the high yield group,with 35.2 % and 30.0 %,respectively.Compared with low-yield group,the Mg content of severe yellow leaf disease and gentle yellow leaf disease group decreased 18.9 % and 13.0 %,respectively.And the Mg of severe yellow leaf disease group was 6.9 % lower than that of gentle yellow leaf disease group.There was no significant difference in Ca contents of betel leaves in different growth years,except for Ca content of betel leaves in high-yield group decreasing with growth years increasing,and no significant linear trend in other group.The Mg contents of betel leaves in different growth years had no significant difference,but Mg contents of betel nut leaves in each group had a decline trend with growth years increasing.