中文摘要：

【目的】蚯蚓和丛枝菌根真菌处于不同的营养级,但在促进植物生长和提高土壤肥力等方面却都发挥着积极作用。研究蚯蚓菌根互作及其对玉米吸收土壤中的氮、磷养分的影响,可为提升土壤生物肥力及促进农业的可持续发展提供理论依据。【方法】本研究采用田间盆栽方式,以玉米为供试作物,研究蚯蚓（Eisenia fetida）与丛枝菌根真菌（Glomus intraradices）互作及其对玉米养分吸收的影响。试验设置P 25和175 mg/kg两个水平。每个磷水平进行接种与不接种菌根真菌以及添加与不添加蚯蚓,共8个处理。调查了玉米生长、养分吸收以及真菌浸染和土壤养分的有效性。【结果】两个磷水平下,蚯蚓和菌根在增加玉米地上部和根系生物量方面有显著正交互作用（P〈0.05）。接种菌根真菌的各处理显著增加了玉米的侵染率及泡囊丰度、根内菌丝丰度等菌根指标。同时添加蚯蚓和接种菌根真菌的处理（AM＋E）显著提高了菌根的侵染率、菌丝密度、丛枝丰度和根内菌丝丰度但是泡囊丰度有所下降。两种磷水平下,AM＋E处理玉米地上部和地下部含氮量和含磷量均显著高于其他三个处理。在低磷条件下,地上部氮磷总量的增加分别是添加蚯蚓和接菌的作用;而地下部磷总量的增加主要是菌根真菌的作用。在高磷条件下,单加蚯蚓显著增加玉米氮磷的总量,而接种菌根真菌对玉米氮磷吸收的影响未达显著性水平。在高磷条件下,单加蚯蚓的处理显著提高玉米地上地下部生物量（P〈0.05）,而单接菌的处理效应不显著,蚯蚓菌根互作通过提高土壤微生物量碳、氮实现对玉米生长和养分吸收的调控。在低磷条件下,单接菌显著提高了玉米的生物量（P〈0.05）,单加蚯蚓的处理具有增加玉米生物量的趋势。菌根真菌主要促进玉米对磷的吸收,蚯蚓主要矿化秸秆和土壤中的氮磷养分增加?

英文摘要：

【Objectives】Earthworms and arbuscular mycorrhizal fungi（ AMF） are in different trophic levels,both play same roles in promoting plant growth and soil biological fertility. This research on the effect of interaction of earthworms and amfungi improving plant nutrient uptake could explore the potential for soil biological fertility in the sustainable agricultural system. 【Methods】A soil buried pot experiment was carried out with maize as tested crop.Two P levels of 25 mg / kg（ low） and 175 mg / kg（ high） were setup using KH2PO4 as P source. With each P level,inoculation of AMF or not,and added earthworms or not were setup. The growth and nutrient uptake by maize were investigated,the availability of soil nutrients were measured. 【Results 】 AMF and earthworms interactivelyincreased maize shoot and root biomass at harvest. The AMF treatment significantly enhanced colonization and vesicle frequency,hyphae frequency. The earthworm × AMF treatment clearly improved maize root colonization rate as well as arbuscular frequency,hyphae frequency,and hyphal length density except for vesicle frequency which was reduced. At both P rates,shoot and root N and P contents in the earthworm × AMF treatment were significantly higher than those in other treatments. At low P rate,the increase of shoot N and P contents were by addition of both AMF and earthworms,while that in root P content was mainly by addition of AMF,root N content was not affected by AMF or earthworm treatment. At high P rate,earthworm treatment significantly increased shoot and root N and P contents AMF treatment did not. At high P rate,earthworm and AMF interaction also increased soil microbial biomass C,which possibly improved root N and P contents and indirectly increased the shoot N and P uptake. At low P rate,soil N mobilization by earthworms might have reduced potential N competition by arbuscular mycorrhizal hyphae,resulting in greater plant shoot and root biomass. Earthworms and AMF interactively enhanced soil N and P availability,le