不同退耕年限下菜子湖湿地土壤酶活性变化
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淮北师范大学 生命科学学院,安徽师范大学 国土资源与旅游学院/安徽自然灾害过程与防控研究省级重点实验室,安徽师范大学 国土资源与旅游学院/安徽自然灾害过程与防控研究省级重点实验室,安徽师范大学 国土资源与旅游学院/安徽自然灾害过程与防控研究省级重点实验室

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S154.2

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资源植物生物学重点实验室项目(ZYZWSW2014006),国家水体污染控制与治理科技重大专项(2012ZX07103-005),国家自然科学基金项目(141001369;41301249)和安徽省自然科学基金项目(1308085MD22)资助。


Characteristics of Soil Enzyme Activities in Wetlands with Various Restoration Ages in Caizi Lake, Anhui Province
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College of life science,Huaibei Normal University,Anhui Key Laboratory of Natural Disasters Process and Prevention/College of Territorial Tourism,Anhui Normal University,Anhui Key Laboratory of Natural Disasters Process and Prevention/College of Territorial Tourism,Anhui Normal University,Anhui Key Laboratory of Natural Disasters Process and Prevention/College of Territorial Tourism,Anhui Normal University

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    摘要:

    选取菜子湖区不同退耕年限(3、7、9、11、21 a)湿地为研究对象,以仍耕作油菜地和原始湿地为参照,分析了退耕还湖后湿地土壤过氧化氢酶、蔗糖酶、磷酸酶和脲酶活性特征,探讨了退耕还湖后湿地土壤酶活性变化规律。结果表明:相对于仍耕作油菜地,退耕后湿地土壤过氧化氢酶活性表层与亚表层均表现为退耕3 ~ 7 a降低,退耕9 ~ 21 a升高趋势;表层土壤蔗糖酶活性呈现退耕3 a升高?退耕7 a降低?退耕9 ~ 11 a升高?退耕21 a降低的趋势,而亚表层土壤退耕3年急剧升高,而后呈降低的趋势;表层土壤磷酸酶活性则呈现退耕3 ~ 11 a逐渐升高,而后逐渐降低的趋势,而亚表层土壤则表现为退耕3 ~ 7 a降低?退耕9 ~ 11 a升高?退耕21 a降低的趋势;退耕后湿地表层土壤脲酶活性表现为退耕3 a降低,退耕7 ~ 9 a升高,退耕11 ~ 21 a降低趋势,亚表层则呈现退耕3 a升高,而后逐渐降低的趋势;退耕21 a湿地土壤4种酶活性均与原始湿地仍存在显著性差异。退耕后水文条件的改变和植被的恢复致使土壤酶来源、酶促反应底物与产物和土壤环境因子变化,进而影响退耕后湿地土壤酶活性变化。

    Abstract:

    The activities of soil catalease, invertase, phosphatase and urease were investigated in wetlands under various ages (3, 5, 7, 9, 11and 21a) of returning farmland to lake (RFL), rape field and native wetland in the Caizi Lake region, Anhui Province. The results indicated that all soil enzyme activities changed along the period of RFL. Compared to rape field, catalease activities of surface and subsurface soils decreased during the 3-7a of RFL, and increased during the 9-21a of RFL. Invertase activities of surface soil increased during the 3a of RLF, declined after 7a of RLF, increased again during the 9-11a of RLF and increased again after 21a of RLF, while invertase activities of subsurface soil increased sharply during the 3a of RLF and then deceased gradually. Phosphatase activities of surface soil increased during the 3-11a of RLF and then decreased gradually, while phosphatase activities of subsurface soil decreased during the 3-7a of RLF, increased during the 9-11a of RLF and declined again after 21a of RLF. Urease activities of surface soil declined during the 3a of RLF, increased during the 7-9a of RLF and decreased again during the 11-21a of RLF, while urease activities of subsurface soil increased during the 3a of RLF and then decreased gradually. Moreover, all soil enzyme activities showed significant difference between wetlands with 21a of RLF and natural wetland. The changes of all soil enzyme activities were attributed to the shift of soil physical and chemical property due to the changes of hydrological condition and vegetation recovery status during the period of RLF.

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包先明,程新锋,纪 磊,郑 真,孔令柱,张平究.不同退耕年限下菜子湖湿地土壤酶活性变化[J].土壤,2016,48(4):692-697. BAO Xianming, CHENG Xinfeng, JI Lei, ZHENG Zhen, KONG Lingzhu, ZHANG Pingjiu. Characteristics of Soil Enzyme Activities in Wetlands with Various Restoration Ages in Caizi Lake, Anhui Province[J]. Soils,2016,48(4):692-697

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  • 收稿日期:2015-07-13
  • 最后修改日期:2015-09-06
  • 录用日期:2015-11-02
  • 在线发布日期: 2016-08-15
  • 出版日期: 2016-08-25