三叶草根间菌丝桥在氮素传递中的作用初探

NITROGEN TRANSFER VIA VA MYCORRHIZA HYPHAE LINK BETWEEN ROOTS OF RED CLOVER

Five compartments with a air gap was designed to examine underground N transfer via VAM hyphae link between roots of red clover. 15 N was injected into the root compartment for donor plant 4 weeks after planting.Plants were harvested 6 weeks afterwards.The experiment had four treatments:two N levels(receiver root compartment);mycorrhiza and non mycorrhiza treatment(B compartment),and each with four replicates.It was demonstrated that there was no significant difference in 15 N abundance in receiver red clover regardless of the inoculation of mycorrhiza fungi and nitrogen fertilization.Both shoot and root dry weight of receiver plants were not affected too,however,plant P and N nutrient status got better under this condition.