1. 中国农业大学资源与环境学院,北京,100193
2. 金正大生态工程集团股份有限公司,山东,临沂,276700
3. 养分资源开发与综合利用国家重点实验室,山东,临沂,276700
[ "王祺(1994-),男,硕士研究生,主要从事农业面源污染研究。E-mail:13263381020@163.com" ]
纸质出版:2018
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王祺, 樊秉乾, 张帅, 等. 不同浓度螯合剂和浸提时间对土壤磷素提取效果研究[J]. 水土保持学报, 2018,32(6):302-308.
WANG Qi, FAN Bingqian, ZHANG Shuai, et al. Effect of Different Concentration and Extraction Time of Chelating Agents for the Soil Phosphorus Extraction in P-stabilized Soils[J]. 2018, 32(6): 302-308.
王祺, 樊秉乾, 张帅, 等. 不同浓度螯合剂和浸提时间对土壤磷素提取效果研究[J]. 水土保持学报, 2018,32(6):302-308. DOI: 10.13870/j.cnki.stbcxb.2018.06.043.
WANG Qi, FAN Bingqian, ZHANG Shuai, et al. Effect of Different Concentration and Extraction Time of Chelating Agents for the Soil Phosphorus Extraction in P-stabilized Soils[J]. 2018, 32(6): 302-308. DOI: 10.13870/j.cnki.stbcxb.2018.06.043.
为确定螯合剂活化土壤磷素的最佳浓度和最优浸提时间,参考水肥一体化技术,在室内浸提条件下,研究了不同浓度(0,0.05,0.1,0.25,0.5,1.0 g/L)乙二胺四乙酸(EDTA)和柠檬酸螯合剂(pH=4)在不同浸提时间(1,12,24,48,72 h)下对粮田、菜田土壤和有效磷被钝化后菜田土壤中磷素提取效果。结果表明:EDTA和柠檬酸在粮田土壤上对磷素提取中最佳条件为螯合剂浓度0.05 g/L,浸提时间12 h。EDTA和柠檬酸在菜田土壤、明矾钝化和混合钝化(明矾∶白云石为1∶1)菜田土壤上提取磷素的最佳条件为螯合剂浓度0.5 g/L,浸提时间12 h;而在白云石钝化土壤中则为螯合剂浓度0.5 g/L,浸提时间1 h。总体来看,柠檬酸的活化提取磷素效果优于EDTA,尤其是在采用明矾和白云石钝化的土壤上。
In this study
the extracting experiment was conducted to investigate the effect of EDTA and citric acid (pH=4) on P mobilizationin in the grain field soil
greenhouse soil and P-stabilized greenhouse soils under different concentrations (0
0.05
0.1
0.25
0.5
1.0 g/L) and different extraction times (1
12
24
48
72 h)
to make sure the optimal concentration and extraction time of chelating agent to extracts P from soils. The results indicated that the optimal concentration and extraction time were 0.05 g/L and 12 h for EDTA and citric acid in grain field soil. The optimal concentration and extraction time were 0.5 g/L and 12 h for EDTA and citric acid in green house soil
alum-stabilized soil and mixed-stabilized (alum:dolomite was 1:1) soil. The optimal concentration and extraction time were 0.5 g/L and 1 h for EDTA and citric acid in dolomite-stabilized soil. Generally
the effect of citric acid was better than that of EDTA
especially in alum and dolomite stabilized soil.
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