| 引用本文: | 马灿灿,杜臻杰,白芳芳,等.聚天冬氨酸添加对猪场废水灌溉土壤氮迁移的影响研究[J].灌溉排水学报,0,():-. |
| ma cancan,du zhenjie,bai fangfang,et al.聚天冬氨酸添加对猪场废水灌溉土壤氮迁移的影响研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】探究在等氮投入的清水和猪场废水处理下，添加不同浓度的聚天冬氨酸（PASP）对土壤无机氮、pH及EC值的影响。【方法】采用室内恒温培养试验，两双因素完全随机区组设计，设置PASP浓度（P0：0%、P1：2.5%、P2：5%、P3：7.5%）、水质（W0：清水、W1：稀释10倍猪场废水、W2：稀释5倍猪场废水）以及不施肥不加PASP的对照组（CK） ，共13个处理。【结果】添加PASP处理可降低培养前期土壤无机氮含量，增加后期无机氮含量，其中高浓度猪场废水处理添加7.5%PASP效果更为显著。W0条件下，P2、P3处理在培养前期土壤NO3--N含量分别减少21.63 mg/kg、10.46mg/kg；NH4+-N含量培养前期显著降低7.39%~49.37%，并在培养后期其含量高于P0处理的1.41~48.07倍。W1条件下，培养前期P1、P2、P3处理NO3--N含量均低于P0处理，减少值介于在5.11~25.52mg/kg；W2条件下，添加PASP处理均增加了土壤NO3--N含量，增加值介于5.91~22.70mg/kg，到培养中后期8~36天期间，添加PASP各处理均比P0处理NO3--N含量增加14.6%~16.10%。W1、W2处理条件下，添加PASP均增加了培养后期NH4+-N含量，其中P2、P3处理差异达到显著。与CK处理相比，施氮处理可降低土壤pH;猪场废水和添加PASP对pH无显著影响。猪场废水处理的土壤EC显著高于清水处理，增幅在60.15%~69.76%之间。【结论】与等氮清水处理相比，猪场废水灌溉处理下添加7.5%PASP可降低培养前期无机氮含量，增加后期无机氮含量，有利于提高氮素利用率，降低氮损失量 ，尤其是高浓度猪场废水趋势更为显著有利于提高氮素利用率，降低氮损失量 。 |
| 关键词: 聚天冬氨酸;猪场废水;室内培养;无机氮;pH;EC |
| DOI： |
| 分类号:s158.5；x71 |
| 基金项目: |
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| Effects of Polyaspartic Acid Addition on Nitrogen Migration Soil Irrigated by Piggery Wastewater |
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ma cancan, du zhenjie, bai fangfang, she yingjun, cui jiaxin, qi xuebin
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Farmland Irrigation Research Institute,CAAS
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| Abstract: |
| 【Objective】 To investigate the effects of different concentrations of polyaspartic acid (PASP) on soil inorganic nitrogen, pH and EC values in the treatment of isonitrogenous clean water and piggery wastewater.【Methods】 An indoor constant temperature culture experiment was conducted, and a two-factor completely random block design was used to set PASP concentration (P0:0%, P1:2.5%, P2:5%, P3:7.5%), water quality (W0: clear water, W1:10 times diluted piggery wastewater, W2: 5 times diluted pig farm wastewater) and control group (CK) without fertilization and without PASP, 13 treatments in total. 【Results】 The addition of PASP treatment could decrease the content of inorganic nitrogen in soil at the early stage of culture and increase the content of inorganic nitrogen at the later stage, and 7.5%PASP treatment had a more significant effect on the treatment of high concentration piggery wastewater. Under W0 condition, the NO3--N content in the soil of P2 and P3 treatment was reduced by 21.63 mg/kg and 10.46mg/kg in the early stage of culture, respectively. NH4+-N content was significantly reduced by 7.39% to 49.37% in the early stage of culture, and was 1.41 to 48.07 times higher than that in P0 treatment in the late stage of culture. Under W1 condition, NO3--N content in P1, P2 and P3 was lower than that in P0, and the reduction value ranged from 5.11 to 25.52mg/kg. Under W2 condition, the addition of PASP increased the NO3--N content in soil, and the increase value ranged from 5.91 mg/kg to 22.70mg/kg. During 8 to 36 days in the middle and late stage of culture, the NO3--N content in all the treatments with PASP increased by 14.6% ~ 16.10% compared with that in P0 treatment. Under W1 and W2 treatments, the addition of PASP increased the NH4+-N content at the later stage of culture, and the difference was significant in P2 and P3 treatments. Compared with CK, nitrogen application could reduce soil pH. Piggery wastewater and addition of PASP had no significant effect on pH. The soil EC of piggery wastewater treatment was significantly higher than that of clean water treatment, increasing by 60.15%~69.76%. 【Conclusion】 Compared with isonitrogenous clean water treatment, adding 7.5%PASP Adding PASP in piggery wastewater treatmentirrigation couldirrigation can reduce inorganic nitrogen in early stage and increase inorganic nitrogen contentitcontent in late stage, which was is beneficial to improve nitrogen use efficiency and reduce nitrogen loss, especially in high concentration piggery wastewater treatment . |
| Key words: Polyaspartic acid; Piggery wastewater; culture experiment; inorganicSnitrogen; pH; EC |
