Effects of immobilization agent and fertilizers on the intercropping system Brassica chinenesis and Tagetes patula
YAN Xiu-xiu1,2, XU Ying-ming1,2, WANG Lin1,2, TAO Xue-ying1,2, SUN Yue-bing1,2, LIANG Xue-feng1,2
1. Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; 2. Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Abstract：A pot experiment was conducted to investigate the effects of mercapto-modified palygorskite (MPAL), K2SO4, and foliar spraying with MnSO4 on the biomass and Cd accumulation in the plants and Cd fractions in soils under the mode of monoculture of low-Cd accumulating cultivar of Brassica chinenesis L., and intercropped B. chinensis and Cd hyperaccumulator Tagetes patula L. The results showed that MPAL significantly reduced Cd concentrations in the shoots of B. chinenesis and T. patula, Cd accumulation in the shoot of B. chinensis, Cd extraction ratio (CER), and available Cd in the soil. Addition of K2SO4 with 0.4g/kg significantly increased Cd accumulation in the shoot of T. patula, while it reduced Cd uptake in the shoot of B. chinensis. Meanwhile, in the intercropped systems the percentage of exchangeable Cd fraction in the rhizosphere soil was decreased, and the ratio of residual Cd fraction was on the contrary. Foliar spraying with 0.6g/L MnSO4 could significantly inhibit Cd concentration, Cd accumulation and CER in the shoot of B. chinensis under the monoculture treatment. In view of reducing Cd uptake and ensuring quality and safety of B. chinenesis, and meanwhile it did not affect CER, the addition of 0.4g/kg K2SO4 was recommended for the intercropping system of B. chinenesis and T. patula.
闫秀秀, 徐应明, 王林, 陶雪莹, 孙约兵, 梁学峰. 钝化剂与肥料对油菜和孔雀草间作体系的影响[J]. 中国环境科学, 2021, 41(3): 1264-1271.
YAN Xiu-xiu, XU Ying-ming, WANG Lin, TAO Xue-ying, SUN Yue-bing, LIANG Xue-feng. Effects of immobilization agent and fertilizers on the intercropping system Brassica chinenesis and Tagetes patula. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(3): 1264-1271.
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