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Yield advantage and cadmium decreasing of rice in intercropping with water spinach under moisture management.
Ecotoxicol Environ Saf. 2020 Mar 01; 190:110102.EE

Abstract

Rice (Oryza sativa L.) intercropping with water spinach (Ipomoea aquatica Forsk) is an effective agricultural practice for safe crop production and for phytoremediation in cadmium-contaminated soil. A field and pot experiment were conducted to investigate the growth and cadmium absorption of rice intercropped with water spinach under different moisture management schemes (continuous flooding, interval flooding, and 75% field capacity). In the field experiment, the concentration of Cd in the grain of rice was significantly lower in the intercropping system than that permitted by the National Food Safety Standard of China (GB 2762-2017). Furthermore, the land equivalent ratio (1.42) was higher in the rice-water spinach intercropping system, indicating a significant advantage of the intercropping system in yield. At the same time, the bio-concentration amount (BCA) of Cd of rice and water spinach in intercropping system significantly increased by 17.99% and 31.98%, respectively (P<0.05). However, the metal removal equivalent ratio (MRER) of Cd was 1.34, which showed the intercropping system of rice-water spinach had advantage in Cd removal. In the pot experiment, the total iron plaque concentration on the root surface of rice and the pH of the rhizosphere soil were higher under continuous flooding (TCF) than under the control conditions (75% field capacity, TCK), which could significantly decrease the available Cd in the rhizosphere soil and the accumulation of Cd in rice organs. So, this study demonstrated that iron plaque can obstruct and decrease the Cd absorbed by rice in a rice-water spinach intercropping system combined with water management. The intercropping rice with water spinach can achieve the goal of remediation while producing for farmland contaminated by Cd.

Authors+Show Affiliations

College of Natural Resources and Environment, South China Agricultural University / Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture of China, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture / Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture, Guangzhou, 510642, China.College of Natural Resources and Environment, South China Agricultural University / Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture of China, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture / Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture, Guangzhou, 510642, China.College of Natural Resources and Environment, South China Agricultural University / Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture of China, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture / Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture, Guangzhou, 510642, China.College of Natural Resources and Environment, South China Agricultural University / Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture of China, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture / Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture, Guangzhou, 510642, China.College of Natural Resources and Environment, South China Agricultural University / Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture of China, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture / Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture, Guangzhou, 510642, China.College of Natural Resources and Environment, South China Agricultural University / Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture of China, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture / Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture, Guangzhou, 510642, China.College of Natural Resources and Environment, South China Agricultural University / Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture of China, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture / Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture, Guangzhou, 510642, China. Electronic address: lihuashou@scau.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31881403

Citation

Kang, Zhiming, et al. "Yield Advantage and Cadmium Decreasing of Rice in Intercropping With Water Spinach Under Moisture Management." Ecotoxicology and Environmental Safety, vol. 190, 2020, p. 110102.
Kang Z, Zhang W, Qin J, et al. Yield advantage and cadmium decreasing of rice in intercropping with water spinach under moisture management. Ecotoxicol Environ Saf. 2020;190:110102.
Kang, Z., Zhang, W., Qin, J., Li, S., Yang, X., Wei, X., & Li, H. (2020). Yield advantage and cadmium decreasing of rice in intercropping with water spinach under moisture management. Ecotoxicology and Environmental Safety, 190, 110102. https://doi.org/10.1016/j.ecoenv.2019.110102
Kang Z, et al. Yield Advantage and Cadmium Decreasing of Rice in Intercropping With Water Spinach Under Moisture Management. Ecotoxicol Environ Saf. 2020 Mar 1;190:110102. PubMed PMID: 31881403.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Yield advantage and cadmium decreasing of rice in intercropping with water spinach under moisture management. AU - Kang,Zhiming, AU - Zhang,Wenyuan, AU - Qin,Junhao, AU - Li,Sihui, AU - Yang,Xu, AU - Wei,Xin, AU - Li,Huashou, Y1 - 2019/12/24/ PY - 2019/09/10/received PY - 2019/12/05/revised PY - 2019/12/18/accepted PY - 2019/12/28/pubmed PY - 2020/3/28/medline PY - 2019/12/28/entrez KW - Cadmium KW - Intercropping KW - Moisture management KW - Rice KW - Water spinach SP - 110102 EP - 110102 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 190 N2 - Rice (Oryza sativa L.) intercropping with water spinach (Ipomoea aquatica Forsk) is an effective agricultural practice for safe crop production and for phytoremediation in cadmium-contaminated soil. A field and pot experiment were conducted to investigate the growth and cadmium absorption of rice intercropped with water spinach under different moisture management schemes (continuous flooding, interval flooding, and 75% field capacity). In the field experiment, the concentration of Cd in the grain of rice was significantly lower in the intercropping system than that permitted by the National Food Safety Standard of China (GB 2762-2017). Furthermore, the land equivalent ratio (1.42) was higher in the rice-water spinach intercropping system, indicating a significant advantage of the intercropping system in yield. At the same time, the bio-concentration amount (BCA) of Cd of rice and water spinach in intercropping system significantly increased by 17.99% and 31.98%, respectively (P<0.05). However, the metal removal equivalent ratio (MRER) of Cd was 1.34, which showed the intercropping system of rice-water spinach had advantage in Cd removal. In the pot experiment, the total iron plaque concentration on the root surface of rice and the pH of the rhizosphere soil were higher under continuous flooding (TCF) than under the control conditions (75% field capacity, TCK), which could significantly decrease the available Cd in the rhizosphere soil and the accumulation of Cd in rice organs. So, this study demonstrated that iron plaque can obstruct and decrease the Cd absorbed by rice in a rice-water spinach intercropping system combined with water management. The intercropping rice with water spinach can achieve the goal of remediation while producing for farmland contaminated by Cd. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/31881403/Yield_advantage_and_cadmium_decreasing_of_rice_in_intercropping_with_water_spinach_under_moisture_management_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(19)31433-2 DB - PRIME DP - Unbound Medicine ER -