有机废物对土壤-水稻系统中重金属行为及水稻生长和产量的影响研究

来源 :浙江大学环境与资源学院 浙江大学 | 被引量 : 0次 | 上传用户:lwz
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Heavy metals in the soil pose a great threat to the environment and ultimately to thehumans through bioaccumulation.A variety of heavy metals are reported to enter thefood chain through uptake by the major crops therefore instigating a vicious cycle ofbeing transferred and retransferred across various trophic levels.This continuum is athreat to the quality and quantity of principal staple foods for instance paddy rice.In thisregard the most notorious element is Copper (Cu) for its efficient mode of uptake bygains and its lethal impact on grain production.Many organic and inorganic substratesassociated with crops include potential sources of heavy metals.One such example is thatof organic fertilizers whose main purpose is to increase the fertility of soil by providingessential nutrients, and to increase crop production by limiting the heavy metals bioavailability.Another utility is the provision of contaminant free food.Contemporaryliterature recognizes these organic fertilizers including manures as source ofcontaminants like Cu.The present research was conducted to evaluate the effect of heavymetal Cu on the growth and production of paddy rice.Different levels of Cu pollutionwere explored.The response of manure to Cu pollution in soil and on to rice growth,production and quality was assessed.
其他文献
氮是植物生长和发育所需的大量营养元素之一。在森林生念系统中,氮往往成为限制植物生长最重要的因素之一,对森林群落的演替有重要的影响。氮在顶级群落稳定性的维护、保持一
品格的六个主要品质是正念、好奇心、勇气、修复力、德行和领导力。品格教育是指获得和加强美德(品质)、价值观(理想和信念),以及为美好生活和繁荣社会作出明智选择的能力。