{"id":55106,"date":"2002-01-01T00:00:00","date_gmt":"2018-12-04T05:55:25","guid":{"rendered":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/assessing-copper-thresholds-for-phytotoxicity-and-potential\/"},"modified":"2018-12-04T06:55:25","modified_gmt":"2018-12-04T05:55:25","slug":"assessing-copper-thresholds-for-phytotoxicity-and-potential","status":"publish","type":"resume","link":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/assessing-copper-thresholds-for-phytotoxicity-and-potential\/","title":{"rendered":"Assessing copper thresholds for phytotoxicity and potential dietary toxicity in selected vegetable crops"},"content":{"rendered":"<p style=\"text-align: justify\">Copper pollution in soils is widespread, and its accumulation in crop products could pose a risk on human health. In this paper, bioavailability of added copper (Cu) and critical Cu concentrations in a vegetable gardensoil was evaluated for Chinese cabbage (Brassica chinensis L.), pakchoi (Brassica chinensis L.), and celery (Apiumg graveolens L. var. dulce DC) based on human dietary toxicity. The availability of added Cu in the soil decreased with incubation time, and had minimal change after 10-12 weeks. After incubated for 12 weeks, about 60% of added Cu was not extractable by DTPA. The same crops were also grown in sand culture to determine their responses to solution Cu. Shoot growth was significantly inhibited at Cu concentrations above 10 mg\/kg in the solution or above 150 mg\/kg (DTPA-Cu) in the soil. The sensitivity of the crops to Cu toxicity differed among the three vegetable crops. Copper concentration in shoots and edible parts varied with Cu supply levels and type of the vegetables. Negative correlations (r = -0.90-0.99**) were noted between Cu concentration in shoots and fresh matter yields, but Cu concentrations in the edible parts were positively correlated with available and total Cu in the soil (r=0.91-0.99**). The critical tissue Cu concentrations at 10% shoot DM reduction were 19.4, 5.5, 30.9 mg\/kg for Chinese cabbage, pakchoi, and celery, respectively. Based on the threshold of human dietary toxicity for Cu (10 mg\/kg), the critical concentrations of total and available Cu in the soil were 430 and 269 mg\/kg for pakchoi, 608 and 313 mg\/kg for celery, and 835 and 339 mg\/kg for Chinese cabbage, respectively.<\/p>\n","protected":false},"template":"","mots_cles":[],"class_list":["post-55106","resume","type-resume","status-publish","hentry"],"acf":{"adresse":"YANG XE,ZHEJIANG UNIV,DEPT RESOURCE SCI;HUAJUANCHI CAMPUS; HANGZHOU 310027, PEOPLES R CHINA.xyang@mail.hz.zj.cn","annee":"2002","mois":"0","numero":"37:6","page":"625-635","auteurs":[{"ID":55100,"post_author":"0","post_date":"2018-12-04 06:55:21","post_date_gmt":"2018-12-04 05:55:21","post_content":"","post_title":"Long","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"long-3","to_ping":"","pinged":"","post_modified":"2018-12-04 06:55:21","post_modified_gmt":"2018-12-04 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05:55:22","post_content":"","post_title":"Yang","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"yang-9","to_ping":"","pinged":"","post_modified":"2018-12-04 06:55:22","post_modified_gmt":"2018-12-04 05:55:22","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/yang-9\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":55103,"post_author":"0","post_date":"2018-12-04 06:55:23","post_date_gmt":"2018-12-04 05:55:23","post_content":"","post_title":"Calvert","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"calvert","to_ping":"","pinged":"","post_modified":"2018-12-04 06:55:23","post_modified_gmt":"2018-12-04 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23:41:20","post_content":"","post_title":"Stoffella","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"stoffella","to_ping":"","pinged":"","post_modified":"2018-12-04 00:41:20","post_modified_gmt":"2018-12-03 23:41:20","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/stoffella\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":55105,"post_author":"0","post_date":"2018-12-04 06:55:24","post_date_gmt":"2018-12-04 05:55:24","post_content":"","post_title":"Ye","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"ye","to_ping":"","pinged":"","post_modified":"2018-12-04 06:55:24","post_modified_gmt":"2018-12-04 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