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  本文選題：環(huán)境學　切入點：硒　出處：《安全與環(huán)境學報》2017年04期 　論文類型：期刊論文

【摘要】：為了解豐城市生態(tài)硒谷土壤的供硒能力及其影響因素,通過實地調(diào)查采樣,對豐城生態(tài)硒谷96個0~20 cm耕層土壤樣品中硒含量、形態(tài)分布、重金屬含量及部分土壤理化性質(zhì)進行研究,并探討與土壤硒有效性的關(guān)系。結(jié)果表明,該地區(qū)土壤全硒質(zhì)量比變幅(541~831μg/kg)達到富硒土壤標準。易被生物利用的水溶態(tài)硒和可交換態(tài)硒質(zhì)量比較少且在不同土壤樣品中差異較大,變幅分別為10.30~38.23μg/kg和10.68~38.45μg/kg,且與土壤全硒有一定的相關(guān)性。土壤全硒、不同土地利用方式和土壤理化性質(zhì)均對土壤硒的有效性產(chǎn)生影響,其中稻田土壤的供硒能力大于旱地,全P和速效P均與水溶態(tài)硒呈極顯著正相關(guān),在土壤硒有效性一定的條件下,全硒含量較高的土壤能夠向作物提供較多的有效硒。
[Abstract]:In order to understand the selenium supplying ability and its influencing factors of ecological selenium-valley soil in Fengcheng city, the selenium content and form distribution in 96 soil samples of ecological selenium-valley in Fengcheng city were studied by field investigation. The contents of heavy metals and physical and chemical properties of some soils were studied, and the relationship between the contents of heavy metals and the availability of selenium in soils was discussed. The soil total selenium mass ratio of 541 渭 g / kg to 541 渭 g / kg reached the standard of rich selenium soil. The water-soluble selenium and exchangeable selenium, which were easily bioutilized, were relatively small and varied greatly in different soil samples. The variation ranges were 10.30 ~ 38.23 渭 g / kg and 10.68 ~ 38.45 渭 g / kg, respectively, which were related to total selenium in soil. Soil total selenium, different land use patterns and physical and chemical properties of soil all affected the availability of soil selenium, and the selenium supply capacity of paddy soil was higher than that of dry land. Total P and available P were significantly positively correlated with water-soluble selenium. Soil with higher total selenium content could provide more available selenium to crops under the condition of constant soil selenium availability.
【作者單位】： 南京農(nóng)業(yè)大學資源與環(huán)境科學學院;南京財經(jīng)大學食品科學與工程學院;
【基金】：農(nóng)業(yè)部優(yōu)質(zhì)高效富硒農(nóng)產(chǎn)品關(guān)鍵技術(shù)研究與示范資金項目(201303106)
【分類號】：S158

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相關(guān)期刊論文 前1條

1 楊蘭芳;土壤中的硒[J];湖北民族學院學報(自然科學版);2000年01期

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本文編號：1629764