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以AlPO4 为P源在温室内采用砂培的方法 ,研究了落叶松 (Larixgmelini) 2年生幼苗对难溶性P酸盐的利用状况 .结果表明 ,落叶松幼苗可以利用一定数量的AlPO4 .在供AlPO4 不接种菌根菌时 ,落叶松幼苗吸收的P可达正常供P时的 35 1%和 6 4 9% .不同菌种对落叶松幼苗利用AlPO4 的影响不同 .接种点柄乳牛肝菌(Suillusgranulatus)时 ,落叶松幼苗对AlPO4 的利用量高于不接种的 ,此时落叶松幼苗吸P量的 2 0 %和 35 %是来自于菌根的贡献 .接种厚环乳牛肝菌 (Suillusgrevillei)时 ,落叶松幼苗对AlPO4 的利用量与不接种的相近 .在P胁迫条件下 ,落叶松幼苗的根 /冠比加大 ,落叶松以加大根生长的方式来增加P的吸收 .
The results showed that Larix gmelini 2-year-old seedlings could utilize a certain amount of AlPO 4 in the process of supplying AlPO 4 When not inoculated with mycorrhizal fungi, the P uptake by larch seedlings reached 35 1% and 64 4%, respectively, at normal P. The effects of different strains on the utilization of AlPO4 in larch seedlings were different.The inoculation of Suillusgranulatus ), Larch seedlings were higher than the non-inoculation of AlPO4, at which 20% and 35% of the P uptake by larch seedlings was from the mycorrhizal root.Inoculation of Suillus grevillei , Larch seedlings had similar utilization rates of AlPO4 and non-inoculation.Under P stress, the root / shoot ratio of Larix gmelinii seedlings increased, and Larix gmelinii increased P uptake by increasing root growth.