| .丛枝菌根真菌（AMF）对137Cs污染土壤下宿根高粱生长、根际磷酸酶和富集核素的影响[J].农业环境科学学报,2013,32(5):. |
| 丛枝菌根真菌（AMF）对137Cs污染土壤下宿根高粱生长、根际磷酸酶和富集核素的影响 |
| Influences of Arbuscular Mycorrhizal Fungi（AMF） on the Growth, Phosphatase Activities and Radioactive Nuclide Bioconcentration of sorghum haipense at Soil Contaminated with 137Cs |
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| DOI：10.11654/jaes.2013.05.011 |
| 中文关键词: 137Cs 丛枝菌根真菌（AFM） 生长特性 宿根高粱 磷酸酶 富集系数 |
| 英文关键词: 137Cs arbuscular mycorrhizal fungi（AMF） growth sorghum haipense phosphatase bioconcentration factor |
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| 摘要点击次数: 2141 |
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| 中文摘要: |
| 通过盆栽试验研究了Glomus geosporum（G.g），Glomus mosseae（G.m），Glomus versiforme（G.v），Glomus etunicatum（G.e）和Glomus diaphanum（G.d）5种丛枝菌根真菌（AMF）对137Cs污染土壤下宿根高粱生长特性、根际磷酸酶活性和核素富集系数的影响。结果表明：G.g, G.m和G.e处理显著提高了宿根高粱茎粗、株高、叶干重和地下部干重等生长指标（P<0.05），均以G.m处理增加最大，较对照分别增加了25.63%、23.25%、26.07%和16.73%；5种AMF处理显著提高了根茎N和K含量（P<0.05），增幅范围分别为6.63%~10.84%和24.28%~29.70%；接种G.m后酸性磷酸酶和碱性磷酸酶活性分别增加了0.31、0.07 mg·kg-1·h-1，但显著降低了宿根高粱根际微域土壤有效磷含量（P<0.05），降低值为3.95 mg·kg-1；另一方面，接种G.m、G.e和G.d处理显著提高了宿根高粱对137Cs的富集能力（P<0.05），富集系数分别是对照的2.79、1.77倍和1.36倍。线性回归分析表明，宿根高粱富集核素137Cs系数与酸性和碱性磷酸酶活性呈极显著正相关（P<0.01），与土壤有效磷呈极显著负相关（P<0.01）。 |
| 英文摘要: |
| A pot experiment was conducted to investigate the effects of Glomus geosporum（G.g）, Glomus mosseae（G.m）, Glomus versiforme（G.v）, Glomus etunicatum（G.e） and Glomus diaphanum（G.d） on the growth, phosphatase activities and bioconcentration factor of 137Cs in sorghum haipense at soil contaminated with 137Cs. The results showed that G.g, G.m and G.e treatment significantly improved the growth indexes（P<0.05）, including stem diameter, plant height, leaf and root dry weight. Meanwhile, the increase of these growth indexes in G.m treatment was the most significant and the corresponding indexes increased by 25.63%，23.25%，26.07% and 16.73% compared with the control, respectively. The five AMF significantly increased N and K concentration in rhizomes of sorghum haipense and the increase range of the two element concentration was 6.63%~10.84% and 24.28%~29.70%, respectively. The treatment inoculated with G.m significantly increased acid phosphatase（0.31 mg·kg-1·h-1） and alkaline phosphatase activities（0.07 mg·kg-1·h-1）, but reduced the available P concentration of by 3.95 mg·kg-1. In addition, the bioconcentration factor of 137Cs in sorghum haipense treated with G.m, G.e and G.d was 2.79 times, 1.77 times and 1.36 times than that of the control, respectively. Moreover, there was a positive significant correlativity（P<0.01） between bioconcentration factor on 137Cs and acid or alkaline phosphatase activities, but bioconcentration factor of 137Cs exhibited a significant negative correlativity with available P concentration（P<0.01）. Based on our results, the means to repair radionuclide pollution soil by AMF-plant symbiont is very effetive in the future. |
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