| 不同外生菌根真菌对难溶性磷的活化 |
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| 引用本文： | 徐冰,李白,秦岭,李晓林.不同外生菌根真菌对难溶性磷的活化[J].吉林农业大学学报,2000,22(4):76-80. |
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| 作者姓名： | 徐冰 李白 秦岭 李晓林 |
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| 作者单位： | 1. 中国农业大学资源与环境学院植物营养系北京 100094
2. 北京农学院北京 102206 |
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| 基金项目： | 国家自然科学基金和北京市基金资助项目(6982009) |
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| 摘 要： | 研究了９种外生菌根真菌在纯培养条件下，对磷矿粉的活化利用情况。结果表明：不同菌根真菌对磷矿粉均有活化作用，且它们之间对磷矿粉的活化程度存在着很大差异性。影响菌根真菌对难溶性磷活化的主要因素包括菌液的酸度及有同酸的种类与含量。菌液中ｐＨ值的降低在一定程度上有利于难溶性磷的活化，但与有效磷含量无明显相关性。菌液中有机酸的分泌与难溶性磷的活化有密切关系，且分泌的有机酸的种类和含量因菌种不同而差异很大。９个菌种都可分泌草酸、乳酸、顺丁烯二酸和反丁烯二酸。
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| 关 键 词： | 外生菌根真菌 磷矿粉 磷活化 养分循环 |
| 文章编号： | 1000-5684(2000)04-0076-05 |
| 修稿时间： | 2000年6月20日 |
Solubilization of Rock Phosphate by Different Ectomycorrhizal Fungi (in Solution Culture) |
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| XU Bing,Li BAI,QIN Ling,LI Xiao-lin.Solubilization of Rock Phosphate by Different Ectomycorrhizal Fungi (in Solution Culture)[J].Journal of Jilin Agricultural University,2000,22(4):76-80. |
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| Authors: | XU Bing Li BAI QIN Ling LI Xiao-lin |
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| Abstract: | Nine species of ectomycorrhizal fungi were grown in liquid media to determine their ability to use rock phosphate as a sole source of phosphorus The results showed that rock phosphate was solubilized by all 9 species of ectomycorrhizal fungi and significant difference existed among the 9 species in their solubility Factors influencing the solubility included pH value and kinds and concentrations of organic acid excreted by ectomycorrhizal fungi The decrease of pH increased the solubility but no correlation between the concentration of available phosphate and pH value was found The excretion of organic acids of ectomycorrhizal fungi was closely related to the solubility of rock phosphate Significant differences were found among species of ectomycorrhizal fungi in kinds and concentration of organic acid excreted Oxalic acid, lactic acid, maleic acid and fumaric acid were detected from excretions of all nine ectomycorrhizal species |
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| Keywords: | ectomycorrhizal fungi rock phosphate solubilization |
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