Nitrogen Release Characteristics of Dry Sludge and Composted Sewage Sludge Applied in Red Soil

BAI De-zhen

doi:10.13961/j.cnki.stbctb.2014.04.074

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Nitrogen Release Characteristics of Dry Sludge and Composted Sewage Sludge Applied in Red Soil

- Nitrogen Release Characteristics of Dry Sludge and Composted Sewage Sludge Applied in Red Soil
- Bulletin of Soiland Water Conservation Vol. 33, Issue 4, Pages: 313-316(2014)
- 作者机构：
  
  青海省环境科学研究设计院,青海,西宁,810007
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.04.074
  CLC：
- Published：2014
- 稿件说明：
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BAI De-zhen. Nitrogen Release Characteristics of Dry Sludge and Composted Sewage Sludge Applied in Red Soil[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 313-316.
DOI：

BAI De-zhen. Nitrogen Release Characteristics of Dry Sludge and Composted Sewage Sludge Applied in Red Soil[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 313-316. DOI： 10.13961/j.cnki.stbctb.2014.04.074.

摘要

在红壤自然状况下

模拟了施肥沟

对红壤不同污泥施肥处理的N素释放特性进行了研究。试验结果表明

干污泥配比在10%~20%时

碱解氮、铵态氮和硝态氮累计释放量分别为:25.71%~33.48%

9.57%~14.85%和4.08%~7.65%。堆肥污泥配比在20%~33%时

其累计释放量分别为13.55%~15.65%

2.03%~4.23%和3.11%~5.37%。干污泥处理的释放量大于堆肥污泥处理的释放量

释放过程变化较堆肥污泥剧烈

铵态氮和硝态氮均有明显峰值

铵态氮最大含量532.98±10 mg/kg

释放量最大达10.95%;硝态氮含量最大为149.2±14 mg/kg

释放量最大时为3.32%。无论是从氮的肥效角度

还是氮释放的环境风险角度考虑

污泥堆肥处理后施肥方式均优于干污泥处理施肥方式。

Abstract

The nitrogen release characteristics of dry sludge and composted sewage sludge applied in red soil was studied by determining the hydrolyzable N

NH4+-N and NO3--N of the different treated and control red soil. The results showed that the accumulative released amounts of hydrolyzable N

NH4+-N and NO3--N were 25.71%~33.48%

9.57%~14.85%

and 4.08%~7.65%

respectively by the 10%~20% dry sludge addition. Meanwhile

the corresponding accumulative released amounts were 13.55%~15.65%

2.03%~4.23%

and 3.11%~5.37%

respectively when 20%~33% dry sludge was used. Moreover

the dry sludge treatments released greater amounts of nitrogen than composted sewage sludge treatments. In the incubation period

the variation of released N of dry sludge treatments is more than composted sludge treatments

and the peak contents and release amounts of NH4+-N and NO3--N were 532.98±10 mg/kg(10.95%) and 149.2±14 mg/kg(3.32%)

respectively. Overall

the composted sewage sludge treatments are better than the dry sludge treatments considering whether the N fertilizer effects and the environment risk of N release.

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