摘要
通过盆栽试验研究了不同比例城市污泥堆肥对土壤理化性质及白三叶生长的影响。结果表明:施加城市污泥堆肥土壤的pH值相对稳定,比不施肥土壤的变化小,城市污泥堆肥有一定的缓冲作用;施肥土壤的有机质含量比不施肥增加了76.69%～204.80%,施肥土壤的总磷含量比不施肥土壤略有升高,施肥质量分数分别为5%、10%、15%和20%时,土壤中无机氮含量分别是不施肥土壤中的5.6、10.0、5.1和4.5倍,施肥质量分数为10%时,无机氮含量最大,表明城市污泥堆肥土地利用可以提高土壤养分含量;种植白三叶的土壤中施加污泥堆肥后,白三叶地上部分及根的干质量比不施肥分别增加了82.42%～229.95%和10.21%～58.23%,表明污泥堆肥能够促进白三叶的生长;在上述施肥比例下营养元素的利用率不同,氮元素的利用率依次为4.3%、5.8%、2.6%和3.5%,磷元素的利用率依次为1.27%、1.64%、1.21%和1.60%。研究结果说明,施用污泥堆肥可提高土壤有机质含量,改善土壤理化性质,促进白三叶的生长,施肥质量分数为10%时,土壤中无机氮含量最高,总氮和总磷的利用率最高,10%为最佳的施肥比例。
A pot-scale test was carried out to investigate the effects of applying sewage sludge compost （SSC） on the physicochemical properties of soil and the growth of white clover （Trifolium repens）. The results showed that after SSC application, pH of the soil was more stable, and the organic content increased by 76.69%-204.80%. The content of total P in soil with SSC amendments was slightly higher than SSC-free soil. At the dosages of 5%, 10%, 15% and 20%, the content of inorganic nitrogen in soil was 5.6, 10.0, 5.1 and 4.5 times of control, indicating that SSC can significantly improve the nutrient content of soil. SSC addition also improved the growth of white clover growing in soil illustrated by the increased biomass. The dry weight of white clover aboveground and its root increased by 82.42%-229.95% and 10.21%-58.23% respectively after SSC dosing. The recovery rates of N from SSC were 4.3%, 5.8%, 2.6% and 3.5%, and for P were 1.27%, 1.64%, 1.21% and 1.60% at the dosages of 5%, 10%, 15% and 20% respectively. The results reveal that SSC application in soil improves its organic content and physicochemical properties, which favors the growth of white clover. The greatest increases in the content of inorganic N and the recovery rates of total N and total P were seen with a dosage of 10%, suggesting that 10% would be suitable.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2013年第1期127-131,共5页
Journal of Beijing Forestry University
基金
环保公益性行业科研专项(201109041)
关键词
城市污泥堆肥
土壤
白三叶
营养元素
sewage sludge compost
soil
white clover
nutritive element
