本文選題：人為干擾 + 小興安嶺森林濕地��； 參考：《環(huán)境科學(xué)學(xué)報》2017年12期

【摘要】：以小興安嶺落葉林沼澤濕地為研究對象,對比研究皆伐地、火燒地和落葉松濕地土壤碳組分和酶活性.結(jié)果表明:(1)3種濕地類型土壤SOC含量表現(xiàn)為對照地顯著高于皆伐地和火燒地(p0.05),在0~10 cm土層中皆伐地與對照地相比降低了58.38%,火燒地與對照地相比降低了61.96%.皆伐地與火燒地在不同土層的土壤中SOC含量差異不顯著(p0.05);DOC含量對照地顯著高于皆伐地和火燒地(p0.05).在0~10cm土層中火燒地DOC含量是皆伐地的1.99倍,兩者差異不顯著(p0.05);不同干擾方式對土壤MBC含量影響的差異主要表現(xiàn)在0~10 cm的土層土壤,對照地分別比皆伐地和火燒地高23.13%和95.79%(p0.05).在不同的土層中皆伐地MBC含量均大于火燒地,與SOC含量的變化趨勢一致.(2)與對照地相比,皆伐地與火燒地0~10 cm土層的土壤蔗糖酶活性分別降低了45.59%和36.76%,脲酶活性顯著降低了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%.土壤碳組分和酶活性在垂直方向上均表現(xiàn)為隨著土層深度增加而減小.皆伐和火燒造成森林濕地土壤碳組分和酶活性降低.
[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.
【作者單位】： 哈爾濱師范大學(xué)黑龍江省普通高等學(xué)校地理環(huán)境遙感監(jiān)測重點實驗室;
【基金】：國家自然科學(xué)基金(No.41301082,4157012165,41601316) 黑龍江省博士后資助項目(No.LRB13-200)~~
【分類號】：S714

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