青海省环境科学研究设计院,青海,西宁,810007
纸质出版:2014
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拜得珍. 干污泥和堆肥污泥施用于红壤中N素的释放特性[J]. 水土保持通报, 2014,33(4):313-316.
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.
拜得珍. 干污泥和堆肥污泥施用于红壤中N素的释放特性[J]. 水土保持通报, 2014,33(4):313-316. DOI: 10.13961/j.cnki.stbctb.2014.04.074.
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.
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。
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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