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[1]LI Wenbin,ZHU Lang,XIE Jia,et al.Effects of Adding Amphoteric Magnetized Carbon on Forage Growth and Soil Copper Availability[J].Research of Soil and Water Conservation,2020,27(03):349-356.

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Effects of Adding Amphoteric Magnetized Carbon on Forage Growth and Soil Copper Availability

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 03 Page number: 349-356 Column: 目次 Public date: 2020-04-20

Title:: Effects of Adding Amphoteric Magnetized Carbon on Forage Growth and Soil Copper Availability

Author(s):: LI Wenbin¹, ZHU Lang¹, XIE Jia¹, ZHANG Yifang¹, DENG Hongyan¹, KANG Le¹, HE Haixia¹, MENG Zhaofu²; (1.College of Environmental Science and Engineering, China West Normal University, Nanchong, Sichuan 637009, China; 2.College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China)

Keywords:: amphoteric magnetized carbon; purple soil; sudan grass; ryegrass; Cu²⁺ content

CLC:: X592

DOI:: -

Abstract:: In order to explore the effects of material addition on forage growth and soil copper availability during phytoremediation, potting experiments were conducted to study the effects of surface application(0—3 cm)and mixed application of amphoteric magnetized carbon on the germination rate, plant height and biomass of sudan grass[Sorghum sudanense(Piper)Stapf.]and ryegrass(Lolium perenne L.)under different Cu² pollution levels [0, 100, 200, 400, 800, 1 200 and 1 600 mg/L], and the variation characteristics of copper content in water-soluble state and acid extracted state of of different soil layers were analyzed. The results showed that:(1)the germination rate and survival rate of ryegrass could be improved by both surface and mixed application of amphoteric magnetized carbon without Cu²⁺ in soil; after Cu²⁺ treatment, surface application of amphoteric magnetized carbon enhanced the germination of sudan grass, but was not beneficial to its survival; mixed application of amphoteric magnetized carbon could improve the survival rate of sudan grass under 400～800 mg/L Cu²⁺ treatment;(2)the height of sudan grass and ryegrass rapidly increased in the early growth stage(about 2 cm/d), and tended to moderate in the remaining stages(after 25 d); application of amphoteric magnetized carbon was more beneficial to the growth of ryegrass, especially by surface application;(3)mixed application of amphoteric magnetized carbon could improve the biomass of sudan grass under 400～800 mg/L Cu²⁺ treatment; when the concentration of Cu²⁺ was less than 200 mg/L, both surface and mixed application of amphoteric magnetized carbon were favorable for the growth of two herbage species;(4)Cu²⁺ contents in water-soluble state and acid-extracted state all maintained the trend that the contents of upper soil layer was higher than those of the subsoil layer, and ryegrass was more capable of reducing the Cu²⁺ content in soil than Sudan grass. In conclusion, surface application of amphoteric magnetized carbon and planting ryegrass in copper-polluted areas had the best effect on soil remediation.

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Last Update: 2020-04-30