规模化养猪场粪便贮存方式及土壤承载力

Fecal Storage Mode and Soil Bearing Capacity of Large-scale Pig Farm

以水冲粪和水泡粪为试验材料,测定其上层和底层干物质、总氮、总磷和总钾的含量,并讨论其含量随时间的变化规律,对粪水进行土壤承载力分析,得到粪水安全施用量和养分消纳所需的土地面积数的计算公式。结果表明,粪水的储存时间为180 d时,总氮、总磷、总钾含量分别平均减少58. 38%、84. 19%和47. 69%;在干物质含量较低的情况下,可根据公式估算某种元素的粪水安全施用量和消纳养分需要的土地面积。

Contents of dry matter,total nitrogen,total phosphorus and total potassium in upper and lower layers were determined by using water flushing and blister manure as test materials. Variation of content with time was also discussed. Soil carrying capacity of manure water was analyzed,and formula for calculating amount of safe application of manure water and amount of land area needed for nutrient absorption was obtained. Results showed that contents of total nitrogen,total phosphorus and total potassium decreased by 58. 38%,84. 19% and 47. 69% respectively when storage time of feces was 180 days. In the case of low dry matter content,formula can be used to estimate amount of safe application of certain elements in manure and land area needed to absorb nutrients.