| 张海霞.不同入侵植物对本土植物根际土壤酶活性及微生物数量的影响[J].广东农业科学,2014,41(21):61-66 |
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不同入侵植物对本土植物根际土壤酶活性及微生物数量的影响 |
| Effects of different invasive plants on rhizosphere soil enzyme activities and microbe quantities of native plant |
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| DOI： |
| 中文关键词: 入侵植物 本土植物 根际 土壤酶活性 微生物数量 |
| 英文关键词: invasive plants native plant rhizosphere soil enzyme activity soil microbe quantities |
| 基金项目:/ |
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| 摘要点击次数: 1398 |
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| 中文摘要: |
| 以紫茎泽兰（Ageratina adenophora）、飞机草（Eupatorium odoratum）、一年蓬（Annual fleabane）、加拿大蓬（Erigeron canadensis）4 种入侵植物及本土植物艾蒿（Artemisia argyi）根际土壤为对象，研究不同入侵植物对本土植物根际土壤理化性质、酶活性、微生物数量的影响并探讨其入侵机制。结果显示：4种入侵植物增加了本土植物根际土壤含水量、电导率，降低了土壤容重和pH，并且对土壤微生物量、酶活性及微生物数量表现为一定程度的增加效应；植物入侵改变了根际土壤养分利用策略，4种入侵植物显著增加了根际土壤脲酶、蔗糖酶和过氧化氢酶活性，却显著降低了根际土壤纤维素酶和硝酸还原酶活性，紫茎泽兰和飞机草根际土壤转化酶和酸性磷酸酶活性显著高于艾蒿，一年蓬和加拿大蓬根际土壤转化酶和酸性磷酸酶活性显著低于艾蒿，对根际土壤硝酸还原酶活性无显著差异；4种入侵植物改变了土壤微生物结构，显著增加了其根际土壤中的细菌的数量，抑制了真菌与放线菌数量，总体来说，4种入侵植物显著提高了微生物总数。相关性分析显示，除了土壤容重、电导率和总孔隙度，其他根际土壤理化性质均与土壤酶活性及微生物数量之间具有较强的相关性，表明土壤系统内部因子处于动态变化和平衡，它们作为相互影响的整体表现出统一性和同步性。 |
| 英文摘要: |
| With rhizosphere of four invasive plants (Ageratina adenophora, Eupatorium odoratum, Annual fleabane, Erigeron canadensis) and native plant (Artemisia argyi) as research subjects, the effects of different invasive plants on rhizosphere soil physical and chemical properties, soil enzyme activities and soil microbe quantities of native plant were
assessed. The results showed that invasive plants increased the rhizosphere soil water and electrical conductivity of native plant, also significantly decreased the soil microbial biomass, soil enzyme activities and soil microbe quantities. Meanwhile,invasive plants changed the soil nutrients utilization strategy at rhizosphere, they restrained the cellulase activity and nitrate reductase significantly, invertase and acid phosphatase activities of A. adenophora and E. odoratum soil were significantly higher than those of A. argyi, while those of A. Fleabane and E. canadensiswere were significantly lower than those of A. argyi, and the activities of nitrate reductase of four invasive plants were equivalent basically. While, invasive plants increased the bacterial amount significantly and significantly decrease the fungal and actinomycetic amount contrarily. In total, invasive plants significantly increased the total number of microorganisms. Correlation analysis showed that except soil bulk density, conductivity and total porosity, other rhizosphere soil properties had a strong correlation with soil enzyme activities and soil microbe quantities, which suggested that the factors in soil system were in dynamic change and balance, they interacted and influenced each other as an organic whole having uniformity and synchronicity. |
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