缺素对普通油茶幼苗根系形态及活力的影响

Effects of Nutrient Deficiency on Roots Morphological Characteristics and Activity of Camellia oleifera Seedlings

以普通油茶幼苗为试材,运用沙培法研究缺素对油茶幼苗根系形态及活力的影响。结果表明,N、P、K缺乏不同程度地抑制油茶幼苗主根生长,扩大根冠比;缺钾和缺磷均抑制油茶幼苗侧根分化和生长,缺氮促进侧根伸长,但是根系相对细弱;N、P、K缺乏会降低根系活力,其中以缺磷作用最为显著,活力仅为全营养液处理的1/8;营养的不平衡对根系发育抑制作用明显。

Sand culture experiment was conducted to study the effects of nutrients deficiency on roots morphological and activity of Camellia oleifera seedlings, The result showed that the main roots length was inhibited,and root-shoot ratio（R/T） uncoordinated by nutrients deficiency,especially N deficiency; the lateral root differentiation and elongation was significantly reduced when seedlings grown in K deficiency,but promoted in N deficiency; The treatments with nutrients deficiency could reduce roots vigor. Nutritional imbalance had significant inhibitory effect on root development.