Effect of intercropping and biochar application on cadmium removal capacity by corchorus olitorius and zea mays

El-Tohory, Shaimaa; Zeng, Wenzhi; Huang, Jie‐Sheng; Moussa, Mohamed G.; Dong, Liming; Mohamed, Abdelkader; Khalifa, Omar; Saleem, Muhammad Hamzah; Zhran, Mostafa; Salama, M.; Wu, Jingwei

doi:10.1016/j.eti.2023.103033

Cited by 10 publications

(7 citation statements)

References 59 publications

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“…A significant decrease in rice Cd uptake was also observed in flood cultivation mode, which might be due to the significant amount of Cd that can be accumulated in water. This study supports previous studies suggesting that the intercropping system decreases plant HM uptake [1,5,11]. In addition, it is important to mention that less Cd was accumulated in rice grown under the high-bed and low-ditch cultivation mode [28].…”

Section: Effects Of Intercropping System and Cultivation Mode On Rice...supporting

confidence: 90%

“…Heavy metal (HM) contamination of soil is a prominent environmental problem that humanity is currently facing and has attracted much attention from both industry and the general public [1][2][3][4]. Soil HM contamination is mainly due to the diffusion, deposition, and accumulation of HMs in industrial solid waste as well as agricultural land irrigated with wastewater containing HMs [2,3,5]. Additionally, the large-scale application of HM-containing pesticides and phosphorus fertilizers significantly contributes to this predicament [3].…”

Section: Introductionmentioning

confidence: 99%

“…Currently, there are three primary methods [6] for HM-contaminated soil remediation: physical, chemical, and biological remediation [2,5,7]. The main idea of bioremediation, a subset of which is phytoremediation, is that it harnesses biological organisms' metabolic processes to transfer, decompose, or contain harmful substances, thereby reducing the concentration of pollutants in the surrounding environment [8].…”

Section: Introductionmentioning

confidence: 99%

“…In comparison to monocropping, the intercropping system is conducive to field ventilation and light penetration, prevention, and pest and disease control while increasing the accumulation of organic matter and improving yields [1,5,7,12]. Intercropping is a well-established agricultural practice that substantially contributes to the sustainable development of agriculture [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…Rice is a staple crop in South China [22] that faces challenges from Cd contamination in paddy fields, which is affecting the quality and safety of rice and induces health risks to human beings [5,23]. Thus, the issue of soil Cd contamination has gained wide public attention, and alternatives should be found to remediate this issue without reducing rice production.…”

Section: Introductionmentioning

confidence: 99%

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Hyperaccumulator Solanum nigrum L. Intercropping Reduced Rice Cadmium Uptake under a High-Bed and Low-Ditch Planting System

Kama,

Ma,

Nabi

et al. 2023

Plants

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Anthropogenic activities have raised cadmium (Cd) concentrations in agricultural soil, emerging as a primary catalyst for the decline in crop yield. Intercropping of two or several plants is one technique among many Cd phytoremediation techniques that has gained enormous attention recently. However, the impact of cultivation modes on Cd movement in rice plants when intercropped with heavy metal (HM) hyperaccumulator plants remains unclear. Thus, this study was designed to explore the effects of cultivation modes and the intercropping of rice with Solanum nigrum L. on rice growth and Cd uptake in Cd-contaminated soil. The experimental design encompassed five treatments: dry cultivation of monocultured rice, monocultured Solanum nigrum L., and intercropped rice–Solanum nigrum L.; flood cultivation of monocultured rice; and intercropped rice–Solanum nigrum L. in a high-bed and low-ditch planting system. The results revealed a significant increase in rice growth when intercropped with Solanum nigrum L., with a notable increase of 18.32 g∙plant−1 observed in rice biomass in dry cultivation under the intercropping system. In contrast, a more modest increase of 3.67 g∙plant−1 was observed in the high-bed and low-ditch intercropped rice–Solanum nigrum L. mode. The soil total Cd was higher in dry cultivation of monocultured rice and Solanum nigrum L. compared to intercropped rice/Solanum nigrum L.-cultivated soil, with lower values recorded for intercropped rice/Solanum nigrum L. under the high-bed and low-ditch planting system. In contrast, no significant effect was noted on soil exchangeable Cd content based on the planting pattern and cultivation mode. Intercropping with Solanum nigrum L. demonstrated a significant reduction of Cd content in various rice tissues, particularly in roots at the maturity stage, while Cd content was reduced across all rice tissues under the high-bed and low-ditch planting system. The Cd content in the stem, leaves, and bran of monocropped rice was higher compared to intercropped rice. This study suggests that the rice–Solanum nigrum L. intercropping system effectively reduces rice Cd uptake, particularly under the high-bed and low-ditch planting system.

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