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控释尿素对污染土壤镉有效性的影响

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成果类型:
期刊论文
作者:
向倩;许超;张杨珠;吴良欢
通讯作者:
Xu, Chao
作者机构:
[许超; 向倩] College of Natural Resources and Environment, South China Agricultural University, Guangzhou , China
[吴良欢] Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou , China
[许超; 张杨珠] College of Resources and Environment, Hunan Agricultural University, Changsha , China
通讯机构:
College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
语种:
中文
关键词:
控释氮肥;镉;有效性;水分
关键词(英文):
Availability;Cadmium;Controlled release nitrogen fertilizer;Moisture
期刊:
中国环境科学
ISSN:
1000-6923
年:
2014
卷:
34
期:
12
页码:
3150-3156
基金类别:
41101293:国家自然科学基金 20114404120015:高等学校博士学科点专项科研基金(新教师类) 2013-121:创新训练项目
机构署名:
本校为其他机构
院系归属:
资源环境学院
摘要:
通过培养试验,研究了普通尿素(PU)、硫包膜尿素(SCU)和树脂包膜尿素(PCU)在最大田间持水量(湿润)和60%田间持水量(适宜湿度)对污染土壤Cd有效性的影响.结果表明,不同水分条件下包膜尿素对土壤Cd有效性的影响差异显著.培养60d后水溶态Cd含量最大田间持水量下均显著低于60%田间持水量下.最大田间持水量下施用PU、SCU和PCU均降低了水溶态Cd含量,降低程度为PCU>PU>SCU;施用SCU和PCU均降低了有效态Cd含量,降低程度为SCU>PCU.60%田间持水量下施用PU和PCU均降低了水溶态Cd含量,降低程度为PU>PCU;施用PU、SCU和PCU均降低了有效态Cd含量,降低程度为PCU>PU>SCU.不同控释尿素和水分含量对水溶态Cd的影响较有...
摘要(英文):
The effects of prilled urea (PU), sulfur coated urea (SCU) and polymer coated urea (PCU) on Cd availability in contaminated soil under two different moisture conditions-maximum water holding capacity (water holding capacity, WHC, noted as humid condition) and 60% of WHC (noted as suitable humid condition) was investigated through incubation experiment. The results showed that the application of different coated nitrogen fertilizer under different moisture conditions significantly affect the availability of Cd. The concentration of water-soluble...

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