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浙江省江山市猕猴桃果园土壤环境质量与生态风险评价 预览

Assessment of Soil Environment Quality and Ecological Risk for Kiwifruit Orchards in Jiangshan City, Zhejiang Province
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摘要 果园土壤环境与果品产量和质量及食用安全性关系密切。已有研究表明目前我国猕猴桃果园土壤中普遍存在养分含量不足、分布不均的问题,个别地区发现有重金属含量超标的现象。浙江省近年来猕猴桃种植面积连年扩大,已是我国重要的猕猴桃产区之一。为查明该省江山市猕猴桃果园土壤环境质量现状,本文选择了两处典型猕猴桃果园采集土壤、岩石、果实样品,采用原子荧光光谱、电感耦合等离子体发射光谱等技术测定土壤和岩石样品中的重金属、养分元素、土壤理化指标和果实样品中的重金属含量。以果园土壤中养分元素丰缺与影响因素、重金属元素含量与果实食用安全性为主要研究内容,开展了猕猴桃果园土壤环境质量与生态风险评价。结果表明:①两处果园土壤中Ag、Bi、Co、Cr、Ni、Sb、Se、V、SiO2等含量低于衢州市和浙江省土壤背景值,Pb、Al2O3等高于衢州市和浙江省土壤背景值,土壤中元素含量受自然地质背景控制的特征明显;②土壤pH值范围为4.61~6.30,按DZ/T0295—2016《土地质量地球化学评价规范》中土壤酸碱度分级标准,属于强酸性和酸性土壤;③养分元素K、Ge、Mo、Zn较丰富,但N、P、Mn、S较缺乏;④土壤中As、Cd、Cr、Cu、Hg、Ni、Pb、Zn含量最大值分别为21.84、0.22、23.53、20.47、0.06、8.82、53.84、133mg/kg,远低于农用地土壤污染风险筛选值(pH≤5.5时标准限值分别为40、0.3、150、150、1.3、60、70、200mg/kg),土壤污染风险低;⑤猕猴桃果实中的重金属含量低于绿色食品限值和食品卫生标准限值,如As含量最高为0.009mg/kg,其限值分别为0.2mg/kg和0.5mg/kg。整体上,研究区土壤具有养分分布不均匀、重金属含量低、酸性强的特点,建议采取科学措施补充和平衡土壤养分,防范土壤酸化导致的重金属活化风险。 BACKGROUND: The orchard soil environment is closely related to kiwifruit yield, quality and its edible safety. Research shows that the nutrient insufficiency and uneven distribution in kiwifruit orchard soil is a common problem in China, and in some areas, the content of heavy metals in soil has been found to exceed the environmental quality standard for soils. In recent years, the planting area of Kiwifruit in Zhejiang Province has been expanded year by year, being one of the important kiwifruit producing areas in China. OBJECTIVES: To study the present situation of soil environmental quality in kiwifruit orchards in Jiangshan City, Zhejiang Province. METHODS: Two typical kiwifruit orchards were selected to collect samples of soil, rock and fruit, and the content of heavy metals, nutrients and physical and chemical parameters of soil and rock samples were determined by atomic fluorescence spectrometry (AFS) and inductively coupled plasma-optical emission spectrometry (ICP-OES). The environmental quality and ecological risk assessment of orchard soil were carried out with the main research contents of nutrient abundance and deficiency in orchard soil, influence factors, heavy metal content and fruit edible safety. RESULTS: The results showed that the content of Ag, Bi, Co, Cr, Ni, Sb, Se, V and SiO 2 in the soil of the two orchards were lower than those of Quzhou City and Zhejiang Province, while Pb and Al 2 O 3 contents were higher than those of Quzhou City and Zhejiang Province. The characteristics of soil element content were obviously controlled by the natural geological background. Soil pH value ranged from 4.61 to 6.30. According to the classification standard in DZ/T 0295-2016, the soils in the studied area belonged to strong acidic and acidic soils. Nutrient elements K, Ge, Mo and Zn were abundant, but N, P, Mn and S were deficient. The maximum value of As, Cd, Cr, Cu, Hg, Ni, Pb and Zn in the soil samples were 21.84, 0.22, 23.53, 20.47, 0.06, 8.82 , 53.84 and 133mg/kg, respectively, which were far lower
作者 贺灵 孙彬彬 吴超 成晓梦 吴正丰 周荣强 候树军 HE Ling;SUN Bin-bin;WU Chao;CHENG Xiao-meng;WU Zheng-feng;ZHOU Rong-qiang;HOU Shu-jun(Key Laboratory of Geochemical Exploration, Ministry of Land and Resources, Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China;UNESCO International Center on Global-Scale Geochemistry, Langfang 065000, China;Jiangshan Natural Resources and Planning Bureau, Jiangshan 324100, China;Jiangshan Forestry Bureau, Jiangshan 324100, China)
出处 《岩矿测试》 CAS CSCD 北大核心 2019年第5期524-533,共10页 Rock and Mineral Analysis
基金 中国地质调查局地质调查项目(DD20160320-02).
关键词 猕猴桃 果园土壤 环境质量 重金属 生态风险评价 原子荧光光谱法 电感耦合等离子体发射光谱法 kiwifruit orchard soil environment quality heavy metals ecological risk assessment atomic fluorescence spectrometry inductively coupled plasma-optical emission spectrometry
作者简介 贺灵,硕士,高级工程师,主要从事生态地球化学调查与评价方面的工作。E-mail:heling@igge.cn。
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