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磷肥对辣椒砷含量及有效性的影响 被引量:1
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作者 祖艳群 田相伟 +1 位作者 吴伯志 李元 《湖北农业科学》 北大核心 2009年第11期2702-2705,共4页
以云南省丘北县树皮乡辣椒主产区辣椒为研究对象,通过大田小区试验,研究磷肥的施用对丘北辣椒砷含量及分配的影响。结果表明,随着磷肥施用量的增加,土壤水溶态砷含量逐渐下降,辣椒茎叶、根和果实中总砷含量也逐渐降低,辣椒果实中的总砷... 以云南省丘北县树皮乡辣椒主产区辣椒为研究对象,通过大田小区试验,研究磷肥的施用对丘北辣椒砷含量及分配的影响。结果表明,随着磷肥施用量的增加,土壤水溶态砷含量逐渐下降,辣椒茎叶、根和果实中总砷含量也逐渐降低,辣椒果实中的总砷含量低于总量的1.5%;辣椒植株各部位的总砷含量和砷的有效富集系数均表现为根>茎叶>果实,辣椒果实砷的有效富集系数为0.32~0.75;随着磷肥施用量的增加,辣椒植株根、茎叶和果实砷的有效富集系数逐渐增加,过多的磷肥施用量可能成为增加砷在辣椒中积累的潜在威胁。 展开更多
关键词 辣椒 磷肥 有效富集系数
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典型潮土剖面主要性质和微量金属垂直分布特征 被引量:9
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作者 谭长银 吴龙华 +3 位作者 骆永明 徐建明 章明奎 张佳宝 《土壤学报》 CAS CSCD 北大核心 2009年第5期817-824,共8页
对不同利用方式下石灰性潮土剖面主要性质和微量金属元素含量垂直分异规律进行了初步研究。结果表明,长期耕种的菜地和旱地0~15cm表层土壤有机碳含量高于其他土层,pH和CaCO3含量低于下层土壤;表层土壤Cd已明显积累;但Cd、Pb、Cu、Zn含... 对不同利用方式下石灰性潮土剖面主要性质和微量金属元素含量垂直分异规律进行了初步研究。结果表明,长期耕种的菜地和旱地0~15cm表层土壤有机碳含量高于其他土层,pH和CaCO3含量低于下层土壤;表层土壤Cd已明显积累;但Cd、Pb、Cu、Zn含量均未超过国家土壤环境质量二级标准。几种微量金属全量在菜地和旱地表层土壤之间没有显著差异,但菜地表层土壤DTPA可提取态Cd含量显著高于旱地。从微量金属的剖面分布看,石灰性潮土全量Cd和DTPA可提取态Cd、Pb、Cu、Zn均有明显的表聚现象,这种分布与土壤有机碳含量、pH和CaCO3含量显著相关。聚类分析表明,该区域耕作土壤环境分析样品的采集以表层土壤0~15cm多点混合样品为宜。 展开更多
关键词 石灰性潮土 微量金属 土壤剖面 有效富集系数 化学提取性
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适于砷轻度超标土壤种植的根菜品种的筛选 被引量:2
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作者 周芬 黄贵凤 +1 位作者 丁昌峰 王兴祥 《农业环境科学学报》 CAS CSCD 北大核心 2013年第10期1984-1991,共8页
采用温室盆栽试验研究潮土和红壤旱地中砷对萝卜、胡萝卜以及马铃薯生长的影响,分析不同品种对砷富集积累能力差异。结果表明,砷处理下所有品种生物量响应存在显著的基因型差异,满堂红萝卜和荷兰15号马铃薯在2种土壤不同砷处理条件... 采用温室盆栽试验研究潮土和红壤旱地中砷对萝卜、胡萝卜以及马铃薯生长的影响,分析不同品种对砷富集积累能力差异。结果表明,砷处理下所有品种生物量响应存在显著的基因型差异,满堂红萝卜和荷兰15号马铃薯在2种土壤不同砷处理条件下均具有很好耐性;齐头黄胡萝卜在红壤条件下生长受阻,耐性最低。不同品种可食部位砷含量以及富集积累能力也存在显著差异(P〈0.05),满堂红萝卜在潮土的砷处理中砷含量超过我国食品安全砷标准(0.05mg·kg-1鲜重),马铃薯的4个品种和扬花萝卜可食部位有效富集系数较低。在12个根菜品种中,荷兰15号马铃薯对砷的富集积累能力低,并且对砷具有较高的耐性,在砷轻度超标的中性土壤(砷超标范围为30~45。mg·kg-1)和酸性土壤(砷超标范围为40~60mg·kg-1)种植荷兰15号马铃薯风险相对较低。 展开更多
关键词 萝卜 胡萝卜 马铃薯 As 有效富集系数
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Ecological Geochemistry of Selenium in the Production Base of Zhangqiu Green Chinese Onion 被引量:3
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作者 庞绪贵 高宗军 +1 位作者 王敏 王增辉 《Agricultural Science & Technology》 CAS 2010年第11期39-43,共5页
Based on the achievement of local ecological geochemical survey,the selenium in surface layer soil of Zhangqiu green Chinese onion within production area is systematically studied in this study.And the ecological geoc... Based on the achievement of local ecological geochemical survey,the selenium in surface layer soil of Zhangqiu green Chinese onion within production area is systematically studied in this study.And the ecological geochemical characters of selenium both in surface layer soil and in green Chinese onions are analyzed,and the relationship between the selenium in plant and soil is discussed.The results show that soil in Zhangqiu is rich in selenium,and it is suitable to develop the selenium-rich green Chinese onion products. 展开更多
关键词 Ecological geochemistry Zhangqiu green Chinese onion Selenium-rich agricultural products Available selenium Biological accumulation coefficient
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Effect of Saline Water on Cadmium Uptake and Remediability of Soil with Brassica Napus
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作者 Mohammad Mahdi Mohammadi Abdolmajid Liaghat Gholamreza Savaghebi 《Journal of Chemistry and Chemical Engineering》 2010年第12期1-6,共6页
Phytoremediation is a new technique for cleaning contaminated soils. This method in comparison with the other techniques is very simple and low cost. Among the pollutants, heavy metals and specially cadmium (Cd) is ... Phytoremediation is a new technique for cleaning contaminated soils. This method in comparison with the other techniques is very simple and low cost. Among the pollutants, heavy metals and specially cadmium (Cd) is very important because of its high movement in soil and high toxicity. Bioavailability of metals in the soil is affected by various factors including saline solution. In fact there are symptoms for increasing Cd uptake due to increasing C1"1 concentration in soil solution. The objective of this study was to investigate the effect of saline irrigation water on cadmium uptake and remediability of soil with Brassica napus (rapeseed) in greenhouse experiment. Saline waters of 0, 1.5 and 2.5 dS/m was applied on soil with different concentrations of Cd (5, 10, 20, 30 and 50 ppm) during the cultivation period of Okapi (fall rapeseed variety). The results of this study showed that there are no significant differences in shoot dry matter exposed to Cd, but root dry matter decreased with increasing Cd concentration (p〈5%). Salinity had a significant effect (p〈l%) on Cd concentration in roots and increased from 26.83 (in control) to 36.46 mg.kg-1 dry wt (in 2.5 dS.m"l treatment). The significant effect (p〈5%) was found in shoots as well and the Cd uptake was increased from 2.14 to 3.25 mg.m^-1dry wt in control and 2.5 dS'm^-1 treatments respectively. Likewise, salinity increased bioaccumulation coefficient, whereas had no significant effect on transport factor. The obtained results showed that Cd metal tend to accumulate more in the roots ofBrassica napus than in the shoots. 展开更多
关键词 Brassica napus CADMIUM heavy metals PHYTOREMEDIATION salinity.
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