本文關(guān)鍵詞：浙江省土壤中硒、碘的環(huán)境與生物地球化學(xué)特征研究　出處：《浙江大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 硒 碘 土壤 環(huán)境 生物 地球化學(xué)特征

【摘要】：硒、碘是人體必需的兩種微量元素,對(duì)人體生理健康和生命安全都有至關(guān)重要的作用。研究硒元素、碘元素在自然介質(zhì)中的分布特性、遷移轉(zhuǎn)化規(guī)律等環(huán)境地球化學(xué)特征,對(duì)合理利用富硒、富碘地區(qū)土地資源優(yōu)勢(shì),科學(xué)改善人民缺硒、缺碘的營(yíng)養(yǎng)狀況具有重要意義。本文在前人調(diào)查的基礎(chǔ)上,選取浙江省北部富硒地區(qū)和浙江省東部富碘地區(qū)作為主要研究對(duì)象,系統(tǒng)研究了兩種元素在浙江省土壤中的環(huán)境與生物地球化學(xué)特征。本文取得的主要研究結(jié)果如下：浙北研究區(qū)表層土壤平均硒含量為0.344 mg·kg-1,達(dá)到富硒水平,其與土壤pH值未呈現(xiàn)相關(guān)性,與土壤有機(jī)質(zhì)呈極顯著正相關(guān),與硫、鎘、汞這三種元素也呈極顯著正相關(guān)；對(duì)不同形態(tài)硒含量的測(cè)定表明,強(qiáng)有機(jī)態(tài)腐植酸態(tài)殘?jiān)鼞B(tài)碳酸鹽態(tài)離子交換態(tài)水溶態(tài)鐵-錳氧化態(tài),且前三者的含量遠(yuǎn)高于后四者,并分別與土壤理化性質(zhì)有一定關(guān)系；浙北富硒地區(qū)所種植蔬菜作物食用部位硒含量均達(dá)到富硒標(biāo)準(zhǔn)。浙東研究區(qū)表層土壤平均碘含量為19.35mg·kg-1,遠(yuǎn)高于浙西南研究區(qū)(1.65mg·kg-1)以及浙江省平均值(1.95mg·kg-1)；兩地區(qū)土壤剖面碘含量差異與表層土壤相似,且深層土壤碘含量都稍大于表層土壤,并隨深度變化呈一定規(guī)律；浙東研究區(qū)剖面中氟、氯、鈣、鎂等海洋元素都與碘呈顯著正相關(guān),而浙西南研究區(qū)卻未發(fā)現(xiàn)上述規(guī)律,猜測(cè)前者土壤碘主要來(lái)源為海洋,其含量變化與當(dāng)?shù)氐牡刭|(zhì)環(huán)境演變有關(guān),后者土壤碘來(lái)源為基巖風(fēng)化；受土壤介質(zhì)影響,富碘、缺碘地區(qū)蔬菜作物食用部位碘含量差距較大。本文的研究結(jié)果為浙江省富硒、富碘土地資源的開發(fā)利用,以及生態(tài)補(bǔ)硒、補(bǔ)碘方式提供基礎(chǔ)資料。
[Abstract]:Selenium and iodine are two essential trace elements in human body, which play a vital role in the physical health and life safety of the human body. Study on selenium and iodine distribution in natural medium, migration and transformation of environmental geochemistry, rich land resources advantages to the rational use of selenium, iodine, plays an important role in improving people's nutrition science of selenium and iodine deficiency. Based on previous investigations, we selected the rich selenium area in the northern part of Zhejiang province and the iodine rich area in the eastern part of Zhejiang Province as the main research objects, and systematically studied the environmental and biogeochemical characteristics of two elements in the soil of Zhejiang province. The main research results are as follows: the average selenium content in surface soil in the study area was 0.344 mg kg-1, reached the level of selenium, and the soil pH value was not significant, and significantly positive correlation with soil organic matter, and sulfur, cadmium and mercury in the three elements also showed a significant positive correlation; Determination of the content of different forms of selenium showed strong organic humic acid state residual carbonate ion exchange state water soluble Fe Mn oxidation state, and the content of the three is much higher than four, there is a certain relationship respectively and soil physicochemical properties; Zhejiang Institute of vegetable crops planting area of selenium enriched selenium content in edible parts reached se standard. The average iodine content in surface soil of eastern Zhejiang region is 19.35mg kg-1, far higher than the study area in the Southwest Zhejiang (1.65mg - kg-1) and the average of Zhejiang province (1.95mg, kg-1); the difference of the soil iodine content in soil and the surface profile of the two are similar, and the content of iodine in deep soil are slightly larger than the surface soil, and showed some changes with depth law; fluorine, chlorine and calcium, magnesium and other elements of Zhejiang Ocean profile in the study area are positively correlated with iodine, and the study area in the Southwest Zhejiang, but did not find the above rules, guess the former soil iodine as a major source of the ocean, the content and the change of the local geological environment evolution, the soil iodine source for bedrock weathering; the effect of soil medium, rich in iodine and iodine deficiency iodine content in edible parts of vegetable crops in a larger gap. The results of this study for the development and utilization of Zhejiang Province, selenium and iodine rich land resources, provide basic data and ecological way of supplementing selenium and iodine.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：S153

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 趙麗娟;陳文德;彭培好;;重慶都市經(jīng)濟(jì)圈土壤重金屬地球化學(xué)特征[J];安徽農(nóng)業(yè)科學(xué);2008年22期

2 陳濤;《環(huán)境中的鎘》簡(jiǎn)介[J];生態(tài)學(xué)雜志;1983年04期

3 林長(zhǎng)進(jìn);淺談區(qū)域地球化學(xué)特征在農(nóng)業(yè)種植和醫(yī)療保健的意義[J];漳州師范學(xué)院學(xué)報(bào)(自然科學(xué)版);2005年02期

4 陳恩;賈磊;朱鑫;;影響從化荔枝生長(zhǎng)及果實(shí)品質(zhì)的地球化學(xué)特征[J];華南地質(zhì)與礦產(chǎn);2012年03期

5 韋啟t，

本文編號(hào)：1342455