板栗叶片矿质元素含量及年周期变化的研究

作者于1987和1988两年对板栗叶片中矿质元素含量及其年周期变化进行了研究。结果表明:N、K 的含量随叶龄的增加而下降,Ca 的含量随叶龄的增加而增加;其中 Zn、Fe、Mn 和 B的含量随叶龄的增加而增加,特别是 Mn 和 B 的增加更为显著;叶中的 N 素水平不仅影响栗树的产量,而且还影响空苞形成,并目施 B 与否对叶片中 B 与 Mn 的含量都产生影响,即二者之间有负相关的趋势。

Study in Minerial Elements and Its Annual Cycle Variaton of Chestnut Leaf

The authors made study on the chestnut leaf content and annual variation of mineral elements in 1987-1988. The results showed that contents of N,K decreased with increase of leaf age,and contents of Ca,Zn、Fe,Mn and B increased with leaf age,the increase of Mn and B were especially obvious,The level of N in leaves not only influenced the output of chestnut,bat also formation of empty bract.Applying B to the soil can change contents of both B and Mn in the leaves,that is,there was a ne- gatively correlation between the contents of B and Mn.