【摘要】 采用盆栽试验研究了3个施磷水平(20,40,100mg/kg)下,接种丛枝菌根真菌(AMF)菌种摩西球囊霉和聚丛球囊霉对刈割后狗牙根生长与再生的影响。结果表明,1)狗牙根根系能与摩西球囊霉和聚丛球囊霉形成良好的共生关系,其中单一接种聚丛球囊霉菌种处理的侵染率最高。2)狗牙根地上部氮、磷浓度呈极显著正相关,暗示着氮、磷积累可能存在协同效应。3)4次刈割条件下,与AMF共生的狗牙根具有较高的再生速度和较大的生物量,表明菌根化有利于增强刈割后狗牙根的再生能力。4)施磷水平对狗牙根的生长与再生产生显著影响,尤其是土壤施磷量40mg/kg比20或100mg/kg更能显著增加刈割后地上部生物量的积累,并加快再生生长的速度。因此,建议在日常养护管理中,可根据狗牙根再生特性和养分吸收情况来接种AMF菌剂并进行适当施肥,以保证狗牙根的生长和增强其刈割后的再生能力。更多还原

【Abstract】 Effects of the arbuscular mycorrhizal fungi(AMF) Glomus mosseae and G.aggregatum,on the growth and regrowth of bermudagrass(Cynodon dactylon) when combined with P applications of 20,40 or 100 mg/kg were examined in pot experiments.Both G.mosseae and G.aggregatum colonized roots of bermudagrass well and the colonization rate of G.aggregatum was higher than that of G.mossea.N concentration of shoots was positively correlated with P concentration(P<0.001),indicating a potential cooperative effect between N and P absorption in bermudagrass.Regrowth rate and shoot biomass were higher in mycorrhizal bermudagrass than in the control during four cutting periods.P application also benefited growth and regrowth of bermudagrass,especially at an application rate of 40 mg/kg.Thus,in order to enhance regrowth of bermudagrass,AMF inoculation and an appropriate supply of P will be needed for regrowth and nutrition absorption.更多还原