卜思怡,王翠红,周伟军,杨蕾静,石敏,盛浩,施强.长株潭地区5种母质发育水稻土锌和铜及镍元素剖面分布特征[J].湖南农业大学学报:自然科学版,2019,45(4):.
长株潭地区5种母质发育水稻土锌和铜及镍元素剖面分布特征
  
DOI:
中文关键词:  水稻土  河沙泥  红黄泥  黄泥田  麻沙泥  紫泥田        剖面分布  长株潭地区
英文关键词:paddy soil  alluvial sandy soil  reddish yellow clayey soil  yellow clayey soil  granitic sandy soil  purple clayey soil  copper  zinc  nickel  profile distribution  Changsha-Zhuzhou-Xiangtan area
基金项目:农业部与财政部科研专项(NBCH2016–6)
作者单位
卜思怡,王翠红,周伟军,杨蕾静,石敏,盛浩,施强 湖南农业大学资源环境学院湖南 长沙 410128 
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中文摘要:
      以长株潭地区5种母质发育的水稻土,即河沙泥、红黄泥、黄泥田、麻沙泥和紫泥田为研究对象,按土壤系统分类原则挖掘典型剖面24个及剖面土样137个,分析测定了土壤全量和有效态铜、锌、镍含量以及土壤pH值、颗粒分级组成、有机质、游离氧化铁含量,研究水稻土铜、锌、镍元素的剖面分布特征以及与土壤理化性质之间的关系。结果表明:剖面各层土壤全铜、全锌含量平均值随剖面加深逐渐降低,耕作层、犁底层、底土层全铜含量分别为26.82、21.54、18.54 mg/kg,全锌含量分别为75.84、66.00、63.19 mg/kg,全镍含量分别为18.40、17.50、18.23 mg/kg;土壤铜、锌、镍有效态含量平均值随剖面加深均逐渐降低,耕作层、犁底层、底土层有效铜含量分别为4.04、2.99、1.29 mg/kg,有效锌含量分别为4.77、2.76、1.14 mg/kg,有效镍含量分别为0.54、0.44、0.23 mg/kg;黄泥田的全量和有效态铜、锌、镍含量均较高,麻沙泥的较低;土壤有机质含量是决定土壤有效态铜、锌、镍含量的主要因子,土壤游离氧化铁含量是决定土壤全铜、全镍含量的主要因子,全锌含量与土壤pH值、颗粒分级组成、有机质、游离氧化铁含量均无显著相关性。总体上,长株潭地区水稻土0~25 cm土体以及部分剖面土壤全层有效态铜和锌含量高于临界值(铜1.5 mg/kg、锌0.5 mg/kg),呈盈余状态,可满足浅根或中根作物对铜、锌的需求。
英文摘要:
      Based on the soil classification, 24 typical sections and 137 soil samples were excavated from the paddy soils in Changsha-Zhuzhou-Xiangtan area of Hunan typical parent material distribution area, namely, alluvial sandy soil, reddish yellow clayey soil, yellow clayey soil, granitic sandy soil and purple clayey soil. The physical and chemical properties of soil Cu, Zn, Ni, pH, particle classification composition, organic matter and free iron oxide were detected and analyzed, with a focus on the contents and distribution characteristics of Cu, Zn and Ni in paddy soil and their relationship. The results showed the average contents of total copper and zinc in each layer of the section decreased with the depth of the section. The total copper contents of the soil were 26.82, 21.54, 18.54 mg/kg, the total zinc contents were 75.84, 66.00, 63.19 mg/kg, and the total nickel contents were 18.40, 17.50, 18.23 mg/kg, respectively. The average contents of effective elements in soil decreased sequentially over the depth of the profile. The average contents of cultivated layer, the bottom layer and bottom soil layer were 4.04, 2.99, 1.29 mg/kg of effective copper, 4.77, 2.76, 1.14 mg/kg of effective nickel, 0.54, 0.44, 0.23 mg/kg of effective nickel. The content of soil elements was higher in yellow clayey soil and lower in granitic sandy soil. The content of soil organic matter was the main soil factor to determine the available contents of Cu, Zn, Ni in soil. The content of free iron oxide in soil was the main soil factor that determined the contents of total Cu and total Ni in soil. There was no significant correlation between total Zn content and soil pH value, particle composition, organic matter and free iron oxide content. In overview, the Cu and Zn contents of paddy soil at 0-25 cm and the sections of paddy soil in Changsha-Zhuzhou-Xiangtan area were higher than the critical values(Cu 1.5 mg/kg, Zn 0.5 mg/kg), which could meet the demand of shallow or middle root crops for copper and zinc.
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