【摘要】：為研究不同濃度造紙廢水灌溉(以CODCr濃度計,其濃度分別為:300,175,50mg·L~(-1))對濕地土壤營養(yǎng)元素[有機質(zhì)、總氮(TN)、總磷(TP)及總鉀(TK)]含量的影響,本研究利用沈陽農(nóng)業(yè)大學綜合試驗場小試裝置模擬遼河口天然蘆葦濕地,來分析濕地土壤營養(yǎng)元素含量在不同濃度廢水灌溉下的變化規(guī)律。結(jié)果表明:造紙廢水灌溉后濕地土壤營養(yǎng)元素含量顯著提高,隨著廢水濃度的增大,土壤中營養(yǎng)元素含量依次增大。有機質(zhì)含量分別為22.420,19.950,20.020g·kg~(-1),為對照組CK的1.409,1.254,1.258倍;TN含量分別為0.742,0.696,0.642g·kg~(-1),為對照組CK的1.317,1.237,1.140倍;TP含量分別為0.586,0.529,0.491g·kg~(-1),為對照組CK的1.407,1.270,1.178倍;TK含量分別為3.265,3.086,3.160g·kg~(-1),為對照組CK的1.115,1.054,1.080倍。對TN、TP及鹽堿離子平衡分析發(fā)現(xiàn),隨廢水濃度的增大,蘆葦體內(nèi)各元素累積量增加,累積率減小,土壤中殘留量加大。利用集對分析方法對造紙廢水灌溉后濕地土壤養(yǎng)分進行評價,以C_1濃度造紙廢水灌溉蘆葦濕地,土壤營養(yǎng)元素等級為Ⅲ級,以C_2、C_3濃度廢水灌溉后土壤的養(yǎng)分評價級別為Ⅳ級,說明較高濃度造紙廢水的灌溉有效地提高了濕地土壤養(yǎng)分的含量,而較低濃度造紙廢水灌溉對土壤養(yǎng)分含量提高幅度有限。
[Abstract]:In order to study the effects of different concentrations of papermaking wastewater irrigation (in terms of CODCr concentration) on the contents of nutrient elements [organic matter, total nitrogen (TN), total phosphorus (TP) and total potassium (TK)] in wetland soil. In this study, the natural Reed wetland in Liaohe estuary was simulated by a small scale test facility in Shenyang Agricultural University, to analyze the variation of soil nutrient content under different concentrations of wastewater irrigation. The results showed that the nutrient content of wetland soil increased significantly after irrigated with papermaking wastewater, and the content of nutrient elements in soil increased in turn with the increase of wastewater concentration. The content of organic matter was 22.420 (19.950) 渭 g kg~ (-1), 1.409 (1.254) (1.258) times of CK of the control group, 0.742n (0.696N) 0.642g kg~ (-1), 1.31771.2371.140 (TP) of the control group (CK), 0.5860.29290.491g kg~ (-1), 1.4071.270g / 1.178g kg~ (-1) of the control CK and 3.2653.083.086.160g kg~ (-1), respectively, of the control group (CK). The results of TN,TP and salt alkali ion equilibrium analysis showed that with the increase of wastewater concentration, the accumulation of elements in Reed increased, the accumulation rate decreased, and the residual content in soil increased. The soil nutrient was evaluated by means of set pair analysis method. The soil nutrient grade of Reed wetland irrigated with C _ (1) concentration papermaking wastewater was grade 鈪，

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