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

作　　者：张俊伶[1] 李晓林[1] 杨志福[1] 

机构地区：[1]中国农业大学植物营养系

出　　处：《核农学报》1997年第4期247-253,共7页Journal of Nuclear Agricultural Sciences

基　　金：国家自然科学基金

摘　　要：应用５室隔板方法研究了三叶草根间菌丝桥在氮素传递中的作用。结果表明：低氮时植株间菌丝桥的形成改善了受体植株氮、磷营养状况，高氮时仅受体植株地上部吸氮量和吸磷量有所增加；供体受体三叶草根间传递１５Ｎ的数量、受体植株的生物量及根系的吸氮量均不受植株间菌丝桥和受体根室施氮水平的影响。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.

关 键 词：三叶草 VA菌根 菌丝桥 ^15N 氮素传递 

分 类 号：S541.201[农业科学—作物学]