摘要
为探讨猪场沼液在砂壤土贮存池中入渗率及其影响因子、氮磷迁移特征,采用间歇供水方式,设置沼液(BS)、井水(W)、1/3沼液+2/3井水(1/3BS)共3个处理,开展3个贮存周期的入渗率、累积入渗量、氮磷水平与垂直迁移特征研究。结果表明:各处理入渗率、累积入渗量均呈现BS<1/3BS<W处理的规律,且沼液入渗率随间歇供水次数增加而大幅下降,这主要与沼液的水质特性及间歇供水方式有关。砂壤土贮存沼液过程中,存在明显的氮磷水平与垂直迁移趋势。在1.2 m贮存深度条件下,沼液氮磷垂直迁移深度达10~20 cm;而沼液氮磷水平迁移相对较弱,其中氮水平迁移深度达5~10 cm,磷主要附着于贮存池侧面的表层土壤。与井水相比,砂壤土贮存池中沼液会显著降低入渗率和累积入渗量,且沼液中氮磷损失均以垂直迁移为主。
This study aimed to investigate the infiltration rate of pig farm biogas slurry in sandy loam storage tanks and the influencing elements,as well as nitrogen and phosphorus transfer characteristics.Intermittent water supply,biogas slurry(BS),water(W),and 1/3 BS+2/3 water(1/3BS)were employed to study the infiltration rate,accumulation infiltration amount,and the lateral and vertical transfer characteristics of nitrogen and phosphorus in three storage periods.The findings revealed that the infiltration rate and accumulation infiltration amount followed the rule of BS<1/3BS<W treatments,and the infiltration rate of the biogas slurry decreased significantly with an increase of intermittent water supply times.This was primarily due to the water quality of the biogas slurry and the intermittent water supply method.In the process of storing biogas slurry in sandy loam,there was an obvious trend of nitrogen and phosphorus transfer in lateral and vertical directions.The vertical transfer depth of nitrogen and phosphorus in biogas slurry was 10-20 cm under the 1.2 m storage depth.However,the lateral transfer was relatively weak,with the depth of the nitrogen lateral transfer being between 5-10 cm,and most of the phosphorus was adhered to the soil surface on the side of the storage tank.In comparison with the W treatment,the BS treatment greatly decreased the infiltration rate and accumulation infiltration amount in sandy loam storage tanks,and vertical transfer was the main loss of nitrogen and phosphorous.
作者
孙国峰
宗焦
盛婧
周炜
张丽萍
王子臣
SUN Guofeng;ZONG Jiao;SHENG Jing;ZHOU Wei;ZHANG Liping;WANG Zichen(Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China;Key Laboratory for Crop and Animal Integrated Farming,Ministry of Agriculture and Rural Affairs,Nanjing 210014,China)
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2023年第1期209-215,共7页
Journal of Agro-Environment Science
基金
江苏省农业科技自主创新资金项目(CX(20)2014)
国家重点研发计划项目(2018YFD0800105)。
关键词
沼液
入渗率
累积入渗量
水平迁移
垂直迁移
biogas slurry
infiltration rate
accumulation infiltration amount
lateral transfer
vertical transfer
