CAJ | 학술논문

采用盆栽根袋技术,将枳根围土壤分为0-2、2-4和4-8 cm 3个水平土层,研究丛枝菌根(AM)真菌地表球囊霉对枳根围土壤中有效Fe及球囊霉素鳌合金属含量的影响.结果表明,接种AM真菌显著降低了枳根围土壤中有效Fe的含量.接种AM真菌的土壤有效Fe含量表现为:0-2 cm>2-4 cm>4-8 cm,而未接种的则表现为:4-8 cm>2-4 cm>0-2 cm;枳不同根围土壤中的菌丝密度表现为:0-2 cm>2-4 cm>4-8 cm,表明菌丝能够穿过尼龙网伸展到4-8 cm土层中;枳不同根围土壤中易提取球囊霉素和总球囊霉素的变化规律一致,表现为:2-4 cm>4-8 cm>0-2 cm;土壤中球囊霉素螯合Fe和Mn的含量在4-8 cm土层中最少,螯合Zn和Cu的含量则在0-2 cm土层中最少.可见,球囊霉素能够螯合Cu等元素,减轻土壤中重金属元素对AM真菌的威胁,进而起到缓冲金属元素释放和保护真菌的作用.
채용분재근대기술,장지근위토양분위0-2、2-4화4-8 cm 3개수평토층,연구총지균근(AM)진균지표구낭매대지근위토양중유효Fe급구낭매소오합금속함량적영향.결과표명,접충AM진균현저강저료지근위토양중유효Fe적함량.접충AM진균적토양유효Fe함량표현위:0-2 cm>2-4 cm>4-8 cm,이미접충적칙표현위:4-8 cm>2-4 cm>0-2 cm;지불동근위토양중적균사밀도표현위:0-2 cm>2-4 cm>4-8 cm,표명균사능구천과니룡망신전도4-8 cm토층중;지불동근위토양중역제취구낭매소화총구낭매소적변화규률일치,표현위:2-4 cm>4-8 cm>0-2 cm;토양중구낭매소오합Fe화Mn적함량재4-8 cm토층중최소,오합Zn화Cu적함량칙재0-2 cm토층중최소.가견,구낭매소능구오합Cu등원소,감경토양중중금속원소대AM진균적위협,진이기도완충금속원소석방화보호진균적작용.
Effects of available iron and metals sequestered by glomalin were studied on trifoliate orange (Poncirus trifoliata L. Raf) inoculated with arbuscular mycorrhizal (AM) fungus (Glomus versiforme). The experiment was carried out with pot culture by root confinement technique which divided the soil into 0-2, 2-4 and 4-8 cm in horizon. The results showed that AM fungus decreased the contents of available iron significantly, and the available iron contents of inoculated treatments were in the order 0-2 cm>2-4 cm>4-8 cm, however those were 4-8 cm>2-4 cm>0-2 cm in non-inoculated treatments. The hyphal length was in the order 0-2 cm>2-4 cm>4-8 cm, suggesting that AM hyphae could reach into the soil up to 4-8 cm away from the infection point. It seemed that easily extractable glomalin and total glomalin contents followed the same changes: 2-4 cm>4-8 cm>0-2 cm. Heavy metals bound to glomalin-related soil glomalin were recorded. The data indicated that Fe and Mn were the minimum in 4-8 cm soil level, however Zn and Cu were in 0-2 cm soil level, suggesting that glomalin could alleviate the toxicity from heavy metals on AM fungus, and had the buffer capacity on metals release and protection of AM fungus.