| 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,2022,41(5):55-63. |
| 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,2022,41(5):55-63. |
|
| 摘要: |
| 【目的】探究在等氮投入的清水和猪场废水处理下，添加不同质量分数的聚天冬氨酸（PASP）对土壤无机氮、pH值及EC值的影响。【方法】采用室内恒温培养试验，两因素完全随机区组设计，设置PASP质量分数（P0：0%PASP、P1：2.5%PASP、P2：5.0%PASP、P3：7.5%PASP）、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量，增加后期无机氮量，其中稀释5倍猪场废水处理添加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量分别减少21.63、10.46 mg/kg；NH4+-N量培养前期显著降低7.39%~49.37%，并在培养后期其量高于P0处理的1.41~48.07倍。W1条件下，培养前期P1、P2、P3处理NO3--N量均低于P0处理，减少值介于5.11~25.52 mg/kg；W2条件下，添加PASP处理均增加了土壤NO3--N量，增加值介于5.91~22.70 mg/kg，到培养中后期8~36 d期间，添加PASP各处理均比P0处理的NO3--N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量，其中P2、P3处理差异达到显著。与CK相比，施氮处理可降低土壤pH值；猪场废水和添加PASP对pH值无显著影响。猪场废水处理的土壤EC值显著高于清水处理，增幅在60.15%~69.76%之间。【结论】与等氮清水处理相比，猪场废水处理添加7.5%PASP可降低培养前期无机氮量，增加后期无机氮量，有利于提高氮素利用率，降低氮损失量，尤其是稀释5倍猪场废水趋势更为显著。 |
| 关键词: 聚天冬氨酸；猪场废水；室内培养；无机氮；pH；EC |
| DOI：10.13522/j.cnki.ggps.2021608 |
| 分类号: |
| 基金项目: |
|
| The Effects of Polyaspartic Acid Amendment on Nitrogen Dynamics in Soil Irrigated with Piggery Wastewater |
|
MA Cancan, DU Zhenjie, BAI Fangfang, SHE Yingjun, CUI Jiaxin, QI Xuebin
|
|
1. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China;
2. Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China;
3. Water Environment Factor Risk Assessment Laboratory of Agricultural Products Quality and Safety,
Ministry of Agriculture and Rural Affairs, Xinxiang 453002, China; 4. Agricultural Water Soil Environmental Field
Research Station of Xinxiang, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
|
| Abstract: |
| 【Objective】Polyaspartic acid (PASP) is widely used in agricultural production as a fertilizer synergist, and the aim of this paper is to investigate its impact on mineral nitrogen, pH and EC of soil irrigated with piggery wastewater. 【Method】The pot experiment was conducted in laboratory. It consisted of four treatments with the PASP concentration being: 0% (P0), 2.5% (P1), 5% (P2) and 7.5% (P3), respectively. Each pot was irrigated by either clean water (W0), or diluted piggery wastewater at volumetric ratio of 1∶10 (W1) or 1∶5 (W2). For each treatment, without fertilization and PASP application was taken as the control.【Result】Addition of PASP reduced inorganic nitrogen at the early stage and increased it at the late stage during the time course of the experiment. P3 was more effective in treating the piggery wastewater. Under W0, P2 and P3 reduced NO3- by 21.63 mg/kg and 10.46 mg/kg, and NH4+ by 7.39% to 49.37% in the early stage, respectively, while at the late stage they increased NO3- and NH4+ by 1.41 to 48.07 times, respectively, compared to P0. Under W1, adding PASP reduced NO3- from 5.11 to 25.52 mg/kg, compared with P0, while under W2, it increased NO3- by 5.91 mg/kg to 22.70 mg/kg, compared to P0. From Day 8 to Day 36 after commencement of the experiment, adding PASP increased NO3- by 14.6%~16.10%, compared with P0. Under W1 and W2, adding PASP increased NH4+ at the late stage, and the difference between P2 and P3 was significant. Compared with CK, nitrogen application reduced soil pH, as opposed to other treatments where the pH remained unchanged. Irrigating with the diluted piggery wastewater increased soil EC by 60.15% to 69.76%, compared to the clean water irrigation. 【Conclusion】 Compared with isonitrogenous clean water treatment, adding 7.5% of PASP with the diluted piggery wastewater reduced mineral nitrogen in soil in the early stage while increasing it in the late stage. This is beneficial to nitrogen use efficiency as it reduces nitrogen loss, especially when irrigating with the less-diluted piggery wastewater. |
| Key words: polyaspartic acid; piggery wastewater; pot experiment; inorganic nitrogen; pH; EC |
