| Cite this article: | 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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| 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 |
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