| 镁肥对土壤铅生物有效性的影响 |
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| 引用本文： | 聂督,王庶陶,丁玉川,关春林.镁肥对土壤铅生物有效性的影响[J].农学学报,2013,3(5):26-30. |
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| 作者姓名： | 聂督 王庶陶 丁玉川 关春林 |
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| 作者单位： | 1. 山西省农业科学院农业环境与资源研究所/山西省土壤环境与养分资源重点实验室,太原,030006
2. 山西省农业科学院,太原,030006 |
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| 基金项目： | 山西省科技攻关项目"山西省主要土壤类型镁供应能力及其镁肥效应研究" |
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| 摘 要： | 铅污染土壤可通过蔬菜消费威胁人类健康。为降低铅污染土壤中铅的生物有效性，减轻铅对作物的伤害，以菠菜(Spinacia oleracea L.)为试验作物，采用盆栽试验方法，设置75、150、300 mg/(kg?土)3个硫酸镁施用量，125、1000 mg/(kg?土)2个铅污染浓度，研究施用硫酸镁肥对土壤中外源铅生物有效性的影响。结果表明，不同铅浓度对菠菜生长、产量和养分吸收都有显著的影响。铅的浓度越大，对作物伤害越大。在铅污染土壤中适当施用镁肥，可以促进菠菜生长，增加产量，叶片叶绿素、维生素Ｃ含量以及氮、磷、钾养分吸收量均明显提高，而铅浓度明显下降。相关分析表明，菠菜镁吸收量与铅吸收量呈显著性负相关关系。研究结果表明，适量镁肥的施用可降低土壤中铅的生物有效性，减轻铅对作物的伤害，提高产量，改善品质，这对轻度铅污染土壤改良和菠菜高产优质生产具有一定的指导意义。
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| 关 键 词： | 南充市 南充市 高温热害 小波分析 相对气象产量 |
| 收稿时间： | 2013/3/12 0:00:00 |
| 修稿时间： | 2013/4/24 0:00:00 |
Effect of Magnesium Fertilizer of Lead Bioavailability of Soil |
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| Nie Du
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Wang Shutao
,
Ding Yuchuan
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Guan Chunlin.Effect of Magnesium Fertilizer of Lead Bioavailability of Soil[J].Journal of Agriculture,2013,3(5):26-30. |
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| Authors: | Nie Du Wang Shutao Ding Yuchuan Guan Chunlin |
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| Institution: | 1(1Institute of Agricultural Environment and Sources of Shanxi Academy of Agricultural Sciences/Key Laboratory of Soil Environment and Nutrient Resources of Shanxi Province,Taiyuan 030006,Shanxi,China;2Shanxi Academy of Agricultural Sciences,Taiyuan 030006,Shanxi,China) |
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| Abstract: | Lead (Pb) contamination of soil poses severe health risks to humans through vegetable consumption. In order to reduce the lead bioavailability of lead-contaminated soil, alleviate lead harm to crops. A soil pot experiment was conducted to investigate the effect of magnesium fertilizer on lead bioavailability of soil. The trial crop is spinach (Spinacia oleracea L.). The experiment design was the randomized complete block with four replications. Three rates of magnesium fertilizer (75, 150, 300 mg/kg soil) and two lead concentrations (125, 1000 mg/kg soil) were employed. The results showed that the different lead concentrations had significant influence on the growth, fresh yield and nutrient uptake of spinach. The stronger of lead concentration, the grater of lead harm to plants. Appropriate application of magnesium fertilizer in lead-contaminated soil can promote spinach growth, increase fresh yield, enhance the contents of leaf chlorophyll and vitamin C, and increase the amount of N, P and K absorbed by spinach plants. Correlation analysis revealed that the relationship between the amount of magnesium absorbed and the amount of lead absorbed by spinach plants was significantly positive correlation. This study indicated that appropriate application of magnesium fertilizer can reduce lead bioavailability in the lead-contaminated soil, alleviate lead harm to plants, increase production and improve quality. It has certain direct function to improve slight lead-contaminated soils and high yield and high quality production of spinach. |
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| Keywords: | Nutrient Uptake |
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