期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Health Risk Assessment of Groundwater in Shigatse Landfill Site of Tibet
1
作者 Peng ZHOU Meiling REN +3 位作者 Wenwu ZHOU Danzeng Qiongdazhuoma Yang LI 《Asian Agricultural Research》 2022年第8期21-27,共7页
[Objectives]The research aimed to grasp environmental quality of groundwater in a landfill site,predict health risk of pollution factors to regional residents,provide scientific basis for landfill management,pollution... [Objectives]The research aimed to grasp environmental quality of groundwater in a landfill site,predict health risk of pollution factors to regional residents,provide scientific basis for landfill management,pollution prevention and control,and ensure safety of residents'drinking water supply.[Methods]Through on-site sampling of three groundwater monitoring wells at Shigatse landfill,and testing and analysis of conventional indexes and heavy metal elements,standard index method and comprehensive index method were used to evaluate environmental quality of groundwater in the landfill area.On this basis,a health risk evaluation model was applied to assess the health risk of residents in Shigatse landfill area.[Results]Comprehensive water quality was good in individual well of Shigatse landfill.Because NH_(3)-N and Fe in the monitoring well exceeded class Ⅲ standard of groundwater environmental quality in 2014,pollution of monitoring well was relatively heavy.The total carcinogenic risk of landfill groundwater for male and female was 1.855×10^(-6) and 2.238×10^(-6),respectively,exceeding the maximum acceptable level of carcinogenic risk for contaminants(1×10^(-6)).Cr^(6+)should be paid attention to.Moreover,risk value of health hazard for females was generally higher than that of males.The total non-carcinogenic risk values for males and females were 0.0577 and 0.0696,respectively,far lower than the non-carcinogenic risk threshold of"1".[Conclusions]The groundwater environmental quality of Shigatse landfill site was good,and it posed a little health risk to regional residents. 展开更多
关键词 Landfill site GROUNDWATER Health risk assessment shigatse
下载PDF
Effects of Film Mulching on the Growth of Silage Maize and Weed 被引量:7
2
作者 郭米娟 余成群 +5 位作者 钟华平 姜炎彬 仓木拉 班洁 张玉雷 邵小明 《Agricultural Science & Technology》 CAS 2010年第7期66-68,98,共4页
[Objective] The aim was to provide scientific reference for the production of silage maize in correlated regions of Tibet.[Method] Effects of film mulching on the growth period,growth traits and yield of silage maize ... [Objective] The aim was to provide scientific reference for the production of silage maize in correlated regions of Tibet.[Method] Effects of film mulching on the growth period,growth traits and yield of silage maize and weed were analyzed.[Result] Under the treatment of film mulching,the growth period of silage maize could be advanced for 7-16 d; the plant length,stem diameter and leaf area were increased; and the grain output was increased by 75.9%.According to the market price of silage maize in 2008,22 500 Yuan/hm^2 was increased.There were 13 kinds of weeds in silage maize field,which belonged to 13 genera,8 families.Among them,6 kinds of weeds belonged to Gramineae,among which Echinochloa crusgalli and Setaria viridis were dominated in the weed communities.Plantago depressa,Eragrostis pilosa and Malva verticillata var.chinensis could be totally controlled by the film mulching; meanwhile the others could be also controlled in a certain degree except Echinochloa crusgalli.[Conclusion] The plastic mulching planting is worth popularizing for the developing of animal husbandry and the incoming of the local farmers in Tibet. 展开更多
关键词 Silage maize Film mulching WEED shigatse
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部