沙地草场植物根系化学元素含量的特征

THE ELEMENTAL CHARACTERSTICS OF THE ROOT SYSTEM OF PLANTS OF THE SANDY LAND OF PASTURE,INNER MONGOLIA

本文报道了内蒙古沙地草场不同植物根系的化学元素含量特征。结果表明:51种植物根系的N、P、K、Si、Na、Fe和灰分的平均含量分别为1.08%、0.104%、0.686%、0.811%、0.049%、0.030%和6.416%。其中相同植物根系的N、P、K、Na和灰分的含量低于其地上部分的平均含量,而Si和Fe相反,根系的平均含量高于其地上部分。

The elemental characterstics of the root system of plants of the sandland of pasture of Inner Mongolia are reported in this paper. These results show that the average contents of N, P, K, Si, Na, Feand ash in 51 species of plant root system are 1.08%, 0.104%, 0.686%,0.811%, 0.049%, 0.030% and 6.41% respectively. The average contentsof N, P, K, Na and ash in the root system are lower than those in theplant system above ground, for same element, but the contents of Si andFe in the two systems are the reverse: the contents of these tow eleme-nts in the aboveground system being lower than those in the root system.vely interrelated.