几种林木植物体及枯落物的微量元素分析

Studies on the Microelements in Forest Trees and Their Litters

分析了杉木、马尾松、火炬松和青冈栎 4种林木叶、小枝和细根中B、Mo、Cu、Zn、Fe、Mn 6种微量营养元素的含量以及林下枯落物中这些元素的含量和贮量 .结果表明 ,各树种枝叶中的B含量不足 ,Mn的含量则远高于正常值 ,其他元素及根中各元素含量正常 .各微量元素在树叶和小枝中的含量顺序是Mn >Fe >Zn >B >Cu >Mo,在根中的含量顺序是Fe >Mn >Zn >Cu >B >Mo.火炬松对微量元素的吸收能力强于其他树种 .枯落物中微量元素含量顺序为阔叶林 >杉木林 >火炬松林 >马尾松林 ;总贮量顺序为马尾松林 >火炬松林 >青冈栎林 >

The contents of elements B, Mo, Cu, Zn, Fe and Mn were studied in needles/leaves, twigs and fine roots of Chinese fir, masson pine, loblolly pine and blue Japanese oak. The contents and storages of these elements in the litters of four plantations were analyzed. The results showed that element B in needles/leaves and twigs of the forest trees were deficient, that contents of Mn were highly above normal level, and that those of the rest elements in needles/leaves and twigs and all those in fine roots were normal. The order of contents of the six elements in needles/leaves and twigs was Mn>Fe>Zn>B>Cu>Mo, while the order was Fe>Mn>Zn>Cu>B>Mo in fine roots. It was found that loblolly pine had the highest capacity to take up micronutrients. The order of microelements contents in litters was blue Japanese oak plantation>Chinese fir plantation>loblolly pine plantation>masson pine plantation, and the order of the total amount of the six microelements was masson pine plantation>loblolly pine plantation>blue Japanese oak plantation> Chinese fir plantation.