摘要
在石灰性褐土上分别选取种植1、3、6、9年蔬菜的大棚土壤,旨在研究不同种植年限对土壤养分、盐分、微量元素及重金属的影响。结果表明,随着种植年限的增加,大棚土壤的养分、盐分等均显著高于对照,其年度增长率表现为有机质<氨态氮<全盐量<速效钾<硝态氮<速效磷,其中速效磷、硝态氮、全盐量依次较对照提高21.8倍、15.9倍、2.3倍。微量元素的年度增长幅度表现为Mn<Zn<Cu<Fe,其中有效态Cu、Zn、Fe含量均高于临界值。重金属年度的增长幅度表现为Pb<Cr<Cd,虽然Cr、Cd、Pb均未超标,但大棚土壤养分、盐分、微量元素与重金属含量均随大棚利用年限的增加呈递增趋势,须引起人们的关注。
The experiment was conducted in calcareous cinnamon soil under vegetable greenhouses for one year, 3, 6, 9 years of utilization. The results showed that the contents of nutrient, total salt, trace elements and heavy metals were significantly higher than that of plot under conventional cultivated dryland. The ratios of annual increase were as follows: organic matter less than or equal ammonium nitrogen less than or equal total salt less than or equal available K less than or equal nitrate nitrogen less than or equal available P, Mn less than or equal Zn less than or equal Cu less than or equal Fe and Pb less than or equal Cr less than or equal Cd. Contents of available P, nitrate nitrogen and total salt of soil in 9 years were 21.8, 15.9 and 2.3 times higher respectively than control. Contents of available Cu, Zn and Fe were higher than critical content.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2005年第5期127-130,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
山西省自然基金资助项目(20041095)
关键词
蔬菜大棚
棚龄
土壤养分
微量元素
vegetable greenhouse
age of utilization
nutrient
trace element
