人为干扰对小兴安岭森林湿地土壤碳组分和酶活性的影响

发布时间：2018-04-11 20:24

本文选题：人为干扰 + 小兴安岭森林湿地　；参考：《环境科学学报》2017年12期

【摘要】：以小兴安岭落叶林沼泽湿地为研究对象,对比研究皆伐地、火烧地和落叶松湿地土壤碳组分和酶活性.结果表明:(1)3种湿地类型土壤SOC含量表现为对照地显著高于皆伐地和火烧地(p0.05),在0~10 cm土层中皆伐地与对照地相比降低了58.38%,火烧地与对照地相比降低了61.96%.皆伐地与火烧地在不同土层的土壤中SOC含量差异不显著(p0.05);DOC含量对照地显著高于皆伐地和火烧地(p0.05).在0~10cm土层中火烧地DOC含量是皆伐地的1.99倍,两者差异不显著(p0.05);不同干扰方式对土壤MBC含量影响的差异主要表现在0~10 cm的土层土壤,对照地分别比皆伐地和火烧地高23.13%和95.79%(p0.05).在不同的土层中皆伐地MBC含量均大于火烧地,与SOC含量的变化趋势一致.(2)与对照地相比,皆伐地与火烧地0~10 cm土层的土壤蔗糖酶活性分别降低了45.59%和36.76%,脲酶活性显著降低了18.22%和55.69%(p0.05),蛋白酶活性降低了19.65%和17.34%,淀粉酶活性降低了6.29%和10.69%.土壤碳组分和酶活性在垂直方向上均表现为随着土层深度增加而减小.皆伐和火烧造成森林湿地土壤碳组分和酶活性降低.
[Abstract]:The soil carbon composition and enzyme activity of clear cutting land, burned land and larch wetland were studied in the study of deciduous forest and swamp wetland in Xiaoxinganling.The results showed that the content of SOC in the three types of wetland soil in the control area was significantly higher than that in the clear-cut land and the fiery land, and the content of SOC in the clear-cut land was lower than that in the control soil layer in the 0 ~ 10 cm soil layer, and the content of SOC in the clear-cut land was lower than that in the control area, and the content of SOC in the burned land was lower than that in the control field by 61.96.There was no significant difference in SOC content between clear-cut land and fire-burned land in different soil layers. The content of SOC in control group was significantly higher than that in clear-cut land and fiery land.In different soil layers, the content of MBC in clear-cut land was higher than that in burned land, and the change trend of SOC content was consistent with that of control land.The soil sucrase activity in 10 cm soil layer was decreased by 45.59% and 36.76%, the urease activity was significantly decreased by 18.22% and 55.69%, the protease activity was decreased by 19.65% and 17.34%, and the amylase activity was decreased by 6.29% and 10.69%, respectively.The soil carbon composition and enzyme activity decreased with the increase of soil depth in the vertical direction.Clear cutting and burning resulted in the decrease of soil carbon composition and enzyme activity in forest wetland.
【作者单位】：哈尔滨师范大学黑龙江省普通高等学校地理环境遥感监测重点实验室;
【基金】：国家自然科学基金(No.41301082,4157012165,41601316) 黑龙江省博士后资助项目(No.LRB13-200)~~
【分类号】：S714

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