Effects of a Composite Soil Amendment on the Quality of Pak Choi(Brassica rapa L. Chinensis Group) Growing in Pb-contaminated Soils

作     者：Liping HU Guoxing ZHOU Lihua JIN Guangmin LIU Yiqian WANG Hongju HE 胡丽萍;周国兴;金丽华;刘光敏;王一茜;何洪巨

作者机构：Key Laboratory of Urban Agriculture （North） of Ministry of Agricuiture Key Laboratory of Biology： and Genetic Improvement of Horticultural Crops （North China） Beijing Vegetable Research Center Beijing Academy of Agriculture end Forestry Sciences Beijing 100097 China Beijing Hengyuan Jiada Science ＆ Technology Co. Ltd. Beijing 100080 China Tongzhou Agricultural Technology Extension Station in Beijing Beijing 101101 China 

出 版 物：《Agricultural Science & Technology》 (农业科学与技术（英文版）)

年 卷 期：2017年第18卷第1期

页      面：118-122,167页

学科分类：12[管理学] 1204[管理学-公共管理] 082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 09[农学] 0902[农学-园艺学] 120405[管理学-土地资源管理] 090202[农学-蔬菜学] 

基　　金：Supported by the Fund of Beijing Leafy Vegetables Innovation Team of Modren Agroindustry Technology Research System(BAIC07-2016) the Fund of Beijing Municipal Commission of Rural Affairs(20120129) 

主　　题：Pak choi Lead Heavy metal Amendment Quality 

摘      要：In the present study, a pot experiment was carded out to investigate the effects of a composite soil amendment at different levels （0, 600, 900 and 1 200 mg/kg） on the soil organic matter content, pH, Pb uptake and nutritional quality of pak choi （Brassica rapa L. Chinensis Group） grown in the soils contaminated by four levels （800, 1 200, 1 600 and 2 000 mg/kg） of Pb. The results showed that 900 mg/kg soil amendment increased the soil organic matter content by 24.19%- 60.00%, but had no significant influence on soil pH. Comparing with control （without amendment application）, the security and nutritional quality of pak choi were obviously improved by applying the soil amendment. In detail, 900 mg/kg soil amendment improved the content of Vc of pak choi growing in 800, 1 200, 1 600 and 2 000 mg/kg Pb-contaminated soils by 13.27%-69.30%, the content of soluble sugar by 54.17%- 87.50%, the dry matter weight by 28.36%-33.39%, and decreased the content of Pb by 19.11%-35.72% and the content of crude fiber by 20.83%-31.03%, respectively. These data indicated that the composite amendment can be used for the in situ repair of Pb-contaminated soils, and the recommended dosage is 900 mg/kg.