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草地学报  2015 

丛枝菌根真菌与磷添加对成株与幼苗间生长关系的影响

DOI: 10.11733/j.issn.1007-0435.2015.04.023, PP. 823-829

Keywords: 丛枝菌根真菌,羊草,冷蒿,磷添加

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Abstract:

为探讨土壤磷梯度对成株与幼苗间菌根效应的影响,通过盆栽试验研究AMF和不同磷添加量对羊草(Leymuschinensis)成株和冷蒿(Artemisiafrigida)幼苗间生长关系的影响。结果表明AMF显著增加了羊草成株的生物量;冷蒿幼苗的菌根效应和菌丝的吸氮吸磷贡献率仅在P1添加水平(2mg·kg-1)时为正效应,其余磷水平下均为负效应。接菌降低了冷蒿幼苗生物量达到最高值时所需要的磷添加水平。研究表明羊草成株旁冷蒿幼苗的建植受到土壤磷含量的影响,当磷添加量大于2mg·kg-1时,AMF的存在可能会抑制冷蒿幼苗的生长。

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