造纸废水灌溉对辽河口湿地土壤营养元素含量影响
发布时间：2018-10-05 18:54
【摘要】：为研究不同浓度造纸废水灌溉(以CODCr浓度计,其浓度分别为:300,175,50mg·L~(-1))对湿地土壤营养元素[有机质、总氮(TN)、总磷(TP)及总钾(TK)]含量的影响,本研究利用沈阳农业大学综合试验场小试装置模拟辽河口天然芦苇湿地,来分析湿地土壤营养元素含量在不同浓度废水灌溉下的变化规律。结果表明:造纸废水灌溉后湿地土壤营养元素含量显著提高,随着废水浓度的增大,土壤中营养元素含量依次增大。有机质含量分别为22.420,19.950,20.020g·kg~(-1),为对照组CK的1.409,1.254,1.258倍;TN含量分别为0.742,0.696,0.642g·kg~(-1),为对照组CK的1.317,1.237,1.140倍;TP含量分别为0.586,0.529,0.491g·kg~(-1),为对照组CK的1.407,1.270,1.178倍;TK含量分别为3.265,3.086,3.160g·kg~(-1),为对照组CK的1.115,1.054,1.080倍。对TN、TP及盐碱离子平衡分析发现,随废水浓度的增大,芦苇体内各元素累积量增加,累积率减小,土壤中残留量加大。利用集对分析方法对造纸废水灌溉后湿地土壤养分进行评价,以C_1浓度造纸废水灌溉芦苇湿地,土壤营养元素等级为Ⅲ级,以C_2、C_3浓度废水灌溉后土壤的养分评价级别为Ⅳ级,说明较高浓度造纸废水的灌溉有效地提高了湿地土壤养分的含量,而较低浓度造纸废水灌溉对土壤养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，
本文编号：2254498
[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，
本文编号：2254498
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