摘要
对山东寿光不同棚龄大棚土壤速效N、P、K及重金属Cu、Zn、Cd、Pb含量调查表明:随大棚棚龄的增加,速效N、P含量有显著的增加,其增加量与棚龄呈极显著正相关,速效K含量增加幅度不大,即N、P、K施用不均衡;重金属Cu、Zn、Pb含量随大棚棚龄的增加有一定的增加,Cd含量没有明显的规律性,但这几项重金属含量均比农田含量要高,表明在大棚高强度施肥及人为活动影响下,引入了重金属;农田及大棚重金属含量均较土壤背景值有一定程度的增加,但未超出国家环境质量标准。
Investigation of soil available N, P, K and heavy metal concentrations in greenhouse soils was conducted in Shouguang, Shandong Province. Results showed that with age of the facilities, soil available N and P increased significantly in content and soil available K also did, but not so significantly, indicating imbalance of NPK ratio in fertilization. Heavy metals, such as Cu, Zn, Cd and Pb, were higher in greenhouse soil than in the open field, and increased with age of the greenhouse, except for Cd, which did not show a regular rising trend. Their concentrations, however, were still within the national criteria for quality of soil environment.
出处
《土壤》
CAS
CSCD
北大核心
2005年第6期626-629,共4页
Soils
基金
国家自然科学基金(项目编号:40071053)资助项目。
关键词
大棚
速效养分
重金属
土壤
Shouguang, Greenhouse soil, Available nutrients, Heavy metal
