Effects of Reducing Biochar Based Fertilizer Application on Rice Yield, Nutrient Uptake and Cost-benefit in Middle-low Yield Field

XIAO Zhuoxi; ZHANG Zhi; LIU Donghai; QIAO Yan; LI Shitao; HU Cheng

doi:10.11924/j.issn.1000-6850.casb2024-0798

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Chin Agric Sci Bull ›› 2025, Vol. 41 ›› Issue (11) : 123-131. DOI: 10.11924/j.issn.1000-6850.casb2024-0798

Effects of Reducing Biochar Based Fertilizer Application on Rice Yield, Nutrient Uptake and Cost-benefit in Middle-low Yield Field

XIAO Zhuoxi ¹^,² ,
ZHANG Zhi ¹^,² ,
LIU Donghai ¹^,² ,
QIAO Yan ¹^,² ,
LI Shitao ¹ ,
HU Cheng ¹^,²

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Abstract

To explore the application potential of biochar based fertilizer to increase the yield and income of rice production in middle-low yield field, field plot experiments were conducted in Yangxin and Shashi area of Hubei Province. The effects of no fertilization (CK), customary fertilization (F), customary fertilization + biochar (FB), biochar based fertilizer (BF1), biochar based fertilizer reduction of 10% (BF2) and biochar based fertilizer reduction of 20% (BF3) on rice yield, nutrient uptake and cost-benefit were studied. The results showed that the application of biochar based fertilizer increased rice yield and straw biomass, and BF1 treatment significantly increased rice yield compared with F treatment, which increased by 11.09% and 9.51% in middle and low yield fields, respectively. Biochar based fertilizer treatment promoted the nutrient uptake of rice, the above-ground N and P accumulations of rice treated with BF1 and BF2 were higher than those treated with F. At the same time, compared with F treatment, BF1 and BF2 treatment significantly improve the apparent recovery rates of N, P and K in middle yield field and the apparent recovery rates of P and K in low yield field. And, BF2 treatment had the highest apparent recovery rate of N (38.99%) in middle yield field, which was 29.41% higher than that of F treatment. In addition, BF1 and BF2 treatments increased the income of rice planting in middle-low yield fields, among which BF1 treatment had the highest income, with an increase of 560.7 yuan/hm² and 1460.3 yuan/hm² compared with F treatment in low and middle yield fields, respectively. In conclusion, the application of 0%-10% reduction of biochar based fertilizer can improve rice yield and fertilizer use efficiency, and increase farmers’ planting income, which is suitable for rice production in middle-low yield field.

Key words

rice / biochar based fertilizer / medium-low yield field / nutrient uptake / fertilizer use efficiency

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XIAO Zhuoxi , ZHANG Zhi , LIU Donghai , et al . Effects of Reducing Biochar Based Fertilizer Application on Rice Yield, Nutrient Uptake and Cost-benefit in Middle-low Yield Field[J]. Chinese Agricultural Science Bulletin. 2025, 41(11): 123-131 https://doi.org/10.11924/j.issn.1000-6850.casb2024-0798

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