城市污泥堆肥产品施用对沙荒地土壤理化性质及高羊茅生长的影响

发布时间：2018-03-09 03:29

本文选题：城市污泥堆肥产品　切入点：沙荒地　出处：《环境工程学报》2017年04期 　论文类型：期刊论文

【摘要】：通过盆栽实验研究了城市污泥堆肥产品4种施用比例(0、10%、25%和50%)对沙荒地土壤理化性质及高羊茅生长的影响,结果表明:污泥堆肥产品的施加使混配土壤p H值向更利于高羊茅生长的p H范围(6.0~7.0)变化,土壤电导率随着施肥比例的增大有显著的增加,当施肥比例为10%、25%、50%时,土壤电导率分别为不施肥沙土的11.93、12.66和19.81倍;城市污泥堆肥产品施用后可显著提高沙荒地土壤中全氮、全磷、全钾及有机质含量,施肥比例为10%、25%和50%的沙土中有机质含量分别是不施肥沙土的3.69、4.22和5.65倍。污泥堆肥产品的施入有利于高羊茅对营养元素氮、磷和钾的吸收,进而促进了高羊茅的生长,但是这种促进作用在实验初期较为缓慢,直到实验后期方才显现出来。当施肥比例为25%时,高羊茅对营养物质的利用率达到最高,确定其为沙荒地土壤改良较为适宜的施肥比例。
[Abstract]:The effects of four kinds of municipal sludge composting products on soil physical and chemical properties and tall fescue growth in sandy wasteland were studied by pot experiment. The results showed that the pH value of mixed soil changed to the pH range of 6.0 ~ 7.0), and the soil electrical conductivity increased significantly with the increase of fertilization ratio, when the fertilization ratio was 1025% and 50%, the pH value of mixed soil changed to that of Festuca arundinacea. The electrical conductivity of soil was 11.93N 12.66 and 19.81 times of that of unfertilized sandy soil, and the contents of total nitrogen, total phosphorus, total potassium and organic matter in sandy wasteland soil were significantly increased after the application of municipal sludge compost. The content of organic matter in sandy soil of 10 ~ 25% and 50% is 3.69 ~ 4.22 and 5.65 times of that of non-fertilized sandy soil, respectively. The application of sludge compost products is beneficial to the absorption of nitrogen, phosphorus and potassium in tall fescue, thus promoting the growth of tall fescue. But the effect was slow in the early stages of the experiment, and it didn't show up until the latter part of the experiment. When the fertilization ratio was 25, the utilization rate of nutrients reached the highest. It is determined that it is a more suitable fertilization ratio for soil improvement in sandy wasteland.
【作者单位】：北京林业大学环境科学与工程学院;
【基金】：国家水体污染控制与治理科技重大专项(2015ZX07203-005-03)
【分类号】：S141.4;X703

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