浙江农业学报 ›› 2023, Vol. 35 ›› Issue (7): 1690-1698.DOI: 10.3969/j.issn.1004-1524.20226908

• 环境科学 • 上一篇    下一篇

规模化猪场粪便养分特征与堆肥过程中填料添加的影响

潘亚杰(), 常会庆(), 宋盼盼   

  1. 河南科技大学 农学院,河南 洛阳 471023
  • 收稿日期:2022-06-20 出版日期:2023-07-25 发布日期:2023-08-17
  • 作者简介:*常会庆,E-mail:hqchang@126.com
    潘亚杰(1998—),女,河南开封人,硕士研究生,研究方向为农业废弃物资源化利用。E-mail:1975290129@qq.com
  • 通讯作者: 常会庆
  • 基金资助:
    国家重点研发计划(2017YFD0801304)

Nutrients characteristics of pig manure in large-scale farms and effect of filler addition during composting

PAN Yajie(), CHANG Huiqing(), SONG Panpan   

  1. College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China
  • Received:2022-06-20 Online:2023-07-25 Published:2023-08-17
  • Contact: CHANG Huiqing

摘要:

在检测规模化猪场粪便中养分含量特征的基础上,研究不同填料添加对猪粪堆肥过程中养分变化的影响,以期为堆肥过程中养分,尤其是氮素的保持提供依据。以豫西地区规模化猪场的脱水猪粪为研究对象,连续171 d对其养分特征开展监测。在此基础上,添加过磷酸钙、膨润土、腐殖质等填料,研究90 d好氧堆肥过程中养分含量的变化。结果表明,猪粪样品中全氮(TN)、P2O5、K2O、有机质的含量分别为0.54%~1.52%、1.20%~3.35%、0.31%~0.84%、54.03%~79.70%,pH值和电导率(EC)分别为6.79~8.14和0.59~2.62 mS·cm-1。以猪粪为原料开展好氧堆肥,各处理均可实现猪粪的无害化堆肥(>50 ℃的时间不低于7 d)。添加3%过磷酸钙或3%腐殖质有利于提高堆体的反应温度,两处理的最高温度分别为62.7 ℃和58.9 ℃、高温(>50 ℃)持续时间分别为15 d和16 d。猪粪堆肥过程中,各处理的TN、P2O5、K2O含量增加,但有机质含量呈逐渐降低趋势。与其他处理相比,添加3%的过磷酸钙和3%的腐殖质有利于堆体氮素的保持,至堆肥结束时,其TN含量分别为1.63%和1.75%。综上,在利用猪粪堆肥时,应根据其养分含量特征,针对性地添加适宜的填料,在本试验条件下,推荐添加腐殖质和过磷酸钙,可提高堆肥的保氮效果。

关键词: 规模化猪场, 猪粪, 养分, 好氧堆肥

Abstract:

Based on the survey of nutrients contents in the pig manure of large-scale farms, the effect of fillers on nutrients changes during composting was investigated to provide basis for the maintenance of nutrients, especially nitrogen. The dehydrated pig manure from typical pig farms in the western Henan Province was selected, and its nutrients contents were consecutively monitored for 171 d. Then, the effects of fillers (calcium superphosphate, bentonite, humus) addition on nutrients changes during the 90-d composting were studied. It was shown that the contents of total nitrogen (TN), P2O5, K2O, and organic matter in the pig manure samples ranged from 0.54% to 1.52%, 1.20% to 3.35%, 0.31% to 0.84%, and 54.03% to 79.70%, respectively, and the pH and electrical conductivity (EC) were 6.79 to 8.14, and 0.59 to 2.62 mS·cm-1, respectively. Aerobic composting could achieve harmless composting of pig manure, as the period with temperature>50 ℃ exceeded 7 d. Addition of 3% calcium superphosphate or 3% humus could increase the reaction temperature during composting, as the maximum temperature reached 62.7 ℃ and 58.9 ℃, and the high temperature (>50 ℃) period lasted 15 d and 16 d, respectively. The contents of TN, P2O5, and K2O during composting increased, yet the organic matter content showed a decreasing trend. Compared with the other treatments, the addition of 3% calcium superphosphate or 3% humus better maintained nitrogen during composting, of which the TN content was 1.63% and 1.75%, respectively, after composting. It was concluded that fillers should be added according to the nutrients contents in pig manure for composting. Under the experiment conditions, humus and calcium superphosphate are recommended to preserve total nitrogen during composting.

Key words: large-scale pig farm, manure, nutrients, aerobic composting

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