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刘亚群 , 刘荣昌, 程诗明, 成亮, 柏明娥, 胡单, 刘汝明, 韩素芳. 香榧林地土壤养分和重金属含量时空变化研究[J]. 浙江林业科技, 2022, 42(4): 9-16. DOI: 10.3969/j.issn.1001-3776.2022.04.002
引用本文: 刘亚群 , 刘荣昌, 程诗明, 成亮, 柏明娥, 胡单, 刘汝明, 韩素芳. 香榧林地土壤养分和重金属含量时空变化研究[J]. 浙江林业科技, 2022, 42(4): 9-16. DOI: 10.3969/j.issn.1001-3776.2022.04.002
LIU Ya-qun, LIU Rong-chang, CHENG Shi-ming, CHENGLing, BAI Ming-e, HU Dan, LIU Ru-ming, HAN Su-fang. Temporal and Spatial Variation of Soil Nutrient and Heavy Metal Contents in Torreya grandis ‘Merrillii’ Stand[J]. Journal of Zhejiang Forestry Science and Technology, 2022, 42(4): 9-16. DOI: 10.3969/j.issn.1001-3776.2022.04.002
Citation: LIU Ya-qun, LIU Rong-chang, CHENG Shi-ming, CHENGLing, BAI Ming-e, HU Dan, LIU Ru-ming, HAN Su-fang. Temporal and Spatial Variation of Soil Nutrient and Heavy Metal Contents in Torreya grandis ‘Merrillii’ Stand[J]. Journal of Zhejiang Forestry Science and Technology, 2022, 42(4): 9-16. DOI: 10.3969/j.issn.1001-3776.2022.04.002

香榧林地土壤养分和重金属含量时空变化研究

Temporal and Spatial Variation of Soil Nutrient and Heavy Metal Contents in Torreya grandis ‘Merrillii’ Stand

  • 摘要: 对香榧Torreya grandis ‘Merrillii’ 林地进行土壤养分、重金属的空间和时间变异分析,有益于香榧产地土 壤管理技术的科学制定。2019 年,以浙江省香榧主产区诸暨、柯桥、嵊州、东阳和磐安5 县(市)共19 个香榧 林地的土壤为研究对象,对土壤养分和重金属含量进行分析。结果表明:香榧林地的土壤有机质含量平均为33.76 g·kg-1,94.73%的样地处于中等以上水平;土壤水解性N 和有效P 含量丰富,处于1 级水平的样地分别占89.47% 和94.73%;土壤速效K 含量总体水平居中,平均为159.52 mg·kg-1,变异系数为57.10%;土壤pH 值平均为4.75, 强酸性土壤(<4.5)占36.84%;中、微量元素均为中等变异;土壤重金属含量除As 和Cd 有部分样地超标外,其 余样地的土壤重金属含量均符合《绿色食品产地环境质量标准(NY/T391—2013)》的限值要求。将本次测定结 果与2003 年戴文圣等对同一区域19 个样地的土壤养分和重金属含量测定结果进行对比研究。结果表明,与2003 年同一村级区域相比,香榧林地的土壤理化性质得到整体提升,土壤有效P、有机质及速效K 含量分列增幅的前 三位,微量元素Mo、Fe、B 含量等均有不同程度的增加,但土壤养分失衡问题依然存在,仍有5.27%样地K 元 素处于极低水平,Ca 含量下降了47.69%,土壤pH 下降了0.78 个单位,土壤酸化严重。基于以上研究结果,建 议香榧林地土壤管理以提升养分利用率、改善物理性质为目标,制定“控氮减磷平衡钾”的科学配施方案,提高 生物有机肥和生物菌肥用量,严格控制重金属施入性外源污染。

     

    Abstract: In September and October during 2019, soil samples of 0-20 cm and 20-40 cm were collected at 19 Torreya grandis ‘Merrillii’standsin Zhuji, Keqiao, Shengzhou, Dongyang and Pan’an, where were the major production area of Zhejiang province. Determinations were implemented in the same year of collection on content of soil nutrients and heavy metal. The results showed that the average soil organic matter content was 33.76g/kg, meaning that 94.73% of the samples were above the medium level. The contents of hydrolyzable N and available P in the soil were rich,with 89.47% and 94.73% at level 1. The mean available K content was 159.52 mg/kg, and the variable coefficient was 57.10%. The average pH value of the soil was 4.75, and 36.84% of the samples were strongly acidic (<4.5). Medium and trace elements showed moderate variation. According to NY/T 391-2013, the content of heavy metals among the samples was within the limit except that of As and Cd. Comparison was made on the results of 2019 and that by Dai Wen-sheng in 2003 in the same stands. It showed that soil physical and chemical properties were improved, especially content of available P, organic matter and available K. Content of Mo, Se and B increased. However K element content of 5.27% samples was at a very low level. The content of Ca decreased by 47.69%, and soil pH decreased by 0.78.

     

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