| 殷佳丽,郑子成,李廷轩.不同植茶年限土壤团聚体全氟和水溶态氟的分布特征[J].农业环境科学学报,2015,34(9):1754-1760. |
| 不同植茶年限土壤团聚体全氟和水溶态氟的分布特征 |
| Distribution of Total Fluoride and Water-soluble Fluoride in Soil Aggregates Under Tea Plantation of Different Years |
| 投稿时间：2015-03-16 |
| DOI：10.11654/jaes.2015.09.018 |
| 中文关键词: 土壤团聚体 植茶年限 全氟 水溶态氟 |
| 英文关键词: soil aggregates tea plantation year total fluoride water-soluble fluoride |
| 基金项目:国家自然科学基金项目(40901138);四川省学术和技术带头人培养资金资助项目(2012);四川农业大学学科建设双支计划团队项目资助(2014) |
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| 中文摘要: |
| 为弄清土壤团聚体全氟和水溶态氟含量对植茶年限的响应特征,采用野外实地调查和室内分析相结合的方法,以植茶16、23、31、53 a土壤为研究对象,开展不同植茶年限对土壤团聚体全氟和水溶态氟含量分布特征研究。结果表明:土壤全氟和水溶态氟含量均随粒径的减小而升高,且主要分布于<0.25 mm粒径团聚体,分别为444.40~566.98 mg·kg-1和0.80~1.22 mg·kg-1;随植茶年限的延长,各粒径团聚体全氟和水溶态氟含量均逐渐升高,且0~20 cm土层高于20~40 cm土层;土壤团聚体对全氟和水溶态氟的贡献率分别有48%~73%和46%~70%来自>5 mm粒径团聚体。随植茶年限的延长,>5 mm粒径团聚体对土壤全氟和水溶态氟的贡献率均先升高后降低,且在植茶23 a时最高,可达68%~73%,而其他粒径团聚体则呈相反的趋势。不同粒径团聚体对土壤全氟和水溶态氟的保持和供应能力存在明显差异,全氟和水溶态氟有向小粒径团聚体富集的趋势。随植茶年限的延长,土壤团聚体全氟和水溶态氟逐渐增加呈表聚特征,其中<5 mm粒径团聚体对土壤全氟和水溶态氟的累积作用在植茶23 a后更为明显。因此,在茶园生产管理上,应注意植茶23 a后茶园0~20 cm土层水溶态氟含量的变化,以降低土壤氟进入茶叶的风险,服务于茶叶产品质量安全。 |
| 英文摘要: |
| Soil fluoride status directly influences the tea quality. In order to understand the effects of tea-planting years on total fluoride and water-soluble fluoride content in soil aggregates, soil samples collected from tea plantation with four different years(16, 23, 31 years and 53 years) were examined. Results showed:The content of total fluoride and water-soluble fluoride increased with decreasing sizes of soil aggregates, and distributed mainly in <0.25 mm aggregate, which were 444.40~566.98 mg·kg-1 and 0.80~1.22 mg·kg-1, respectively. The content of total fluoride and water-soluble fluoride in soil aggregates of all sizes increased significantly over planting years, with higher in 0~20 cm than in 20~40 cm soil. The contributions of total fluoride and water-soluble fluoride in >5 mm soil aggregates to the whole soil were 48%~73% and 46%~70%, respectively, and they displayed a inverse “V” pattern over planting years, with the greatest contribution rates(68%~73%) found in the 23rd years. The opposite patterns appeared in the other soil aggregates. The total and water-soluble fluoride were significantly different among different soil aggregates, and accumulated in surface soil as plantation year increased. In addition, <5 mm aggregates played an obvious role in the accumulation of total fluoride and water-soluble fluoride in soils with more than 23 years of plantation. Therefore, attentions may be paid to the content of water-soluble fluoride in the 0~20 cm soil layer when the tea plantation is more than 23 years in order to reduce the risk of high fluoride tea. |
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