Effects of Microbial Biochar-Based Fertilizer on Yield and Quality of Rice in Cadmium-Contaminated Paddy Fields
DOI: 10.23977/jmcs.2024.030101 | Downloads: 14 | Views: 623
Author(s)
Jing Qian 1, Peng Zhu 1, Junhao Deng 1, Xiaoying Peng 1, Huiqun Wang 1
Affiliation(s)
1 College of Bioscience & Biotechnology, Hunan Agricultural University, Changsha, Hunan, 410128, China
Corresponding Author
Xiaoying PengABSTRACT
A randomized block design was used to set up three treatments: "biochar-based fertilizer + microbial inoculant + silicon foliar fertilizer" (microbial biochar-silicon fertilizer), "biochar-based fertilizer + microbial inoculant" (microbial biochar-based fertilizer), and regular compound fertilizer (control). A large-scale demonstration of the field effectiveness of microbial biochar-silicon fertilizer was also conducted. The study investigated its effects on the growth physiology and grain cadmium content of rice variety Longjing Youdi in cadmium-contaminated soil. The results showed that the net photosynthetic rate of rice flag leaves during the grain-filling stage in the microbial biochar-silicon fertilizer and microbial biochar-based fertilizer treatments was significantly different from the control, with the order being microbial biochar-silicon fertilizer > microbial biochar-based fertilizer > regular fertilizer. Microbial biochar-based fertilizer can enhance the rice's physiological resistance, improve the photosynthetic capacity during the booting, heading, and grain-filling stages, and increase the plant height and relative yield at harvest. The rice in the microbial biochar-silicon fertilizer demonstration fields grew uniformly and had full grains. Field measurement results showed that the actual yield of the microbial biochar-silicon fertilizer demonstration model was 558.6 kg/667m2, an increase of 9.2% compared to the control model. The grain cadmium content in the microbial biochar-silicon fertilizer demonstration model was 0.225 (mg/kg), a reduction of 79.0% compared to the control model. The effects of increasing yield and reducing grain cadmium content in the microbial biochar-silicon fertilizer demonstration model were significant, thereby improving grain quality.
KEYWORDS
Microbial Biochar-Based Fertilizer, Rice, Growth Physiology, CadmiumCITE THIS PAPER
Jing Qian, Peng Zhu, Junhao Deng, Xiaoying Peng, Huiqun Wang, Effects of Microbial Biochar-Based Fertilizer on Yield and Quality of Rice in Cadmium-Contaminated Paddy Fields. Journal of Modern Crop Science (2024) Vol. 3: 1-9. DOI: http://dx.doi.org/10.23977/jmcs.2024.030101.
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