Biochar Amendment Increases C and N Retention in the Soil-Plant Systems: Its Implications in Enhancing Plant Growth and Water-Use Efficiency Under Reduced Irrigation Regimes of Maize (Zea mays L.)
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Biochar Amendment Increases C and N Retention in the Soil-Plant Systems : Its Implications in Enhancing Plant Growth and Water-Use Efficiency Under Reduced Irrigation Regimes of Maize (Zea mays L.). / Wan, Heng; Chen, Yiting; Cui, Bingjing; Liu, Xuezhi; Hou, Jingxiang; Wei, Zhenhua; Liu, Jie; Liu, Fulai.
In: Journal of Soil Science and Plant Nutrition, Vol. 23, 2023, p. 1576-1588.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Biochar Amendment Increases C and N Retention in the Soil-Plant Systems
T2 - Its Implications in Enhancing Plant Growth and Water-Use Efficiency Under Reduced Irrigation Regimes of Maize (Zea mays L.)
AU - Wan, Heng
AU - Chen, Yiting
AU - Cui, Bingjing
AU - Liu, Xuezhi
AU - Hou, Jingxiang
AU - Wei, Zhenhua
AU - Liu, Jie
AU - Liu, Fulai
PY - 2023
Y1 - 2023
N2 - Biochar influences soil biophysicochemical processes and nutrient availability, yet the effects of different biochar and soil water dynamics on carbon (C) and nitrogen (N) retention in the soil-plant systems remain unknown. Maize plants were grown in split-root pots filled with clay loam soil amended with wheat straw pellet biochar (WSP) and softwood pellet biochar (SWP) at 2% (w/w) and were either irrigated daily to 90% of water-holding capacity (FI) or irrigated with 70% volume of water used for FI to the whole root-zone (DI) or alternately to half root-zone (PRD) from the fourth leaf to grain-filling stage. Compared to the unamended controls, biochar amendment enhanced plant biomass and water-use efficiency, particularly when combined with PRD. Although the WSP amendment tended to decrease soil net N mineralization rate, it significantly increased C and N retention in the soil-plant systems. Compared to DI, PRD significantly increased soil respiration rate while lowering soil total organic C content. Moreover, PRD increased soil inorganic N content, which might be related to increased mineralization of soil organic C (SOC) and soil organic N (SON). Such effects might implicate that PRD outperformed DI in enhancing the mineralization of soil organic matter. Although PRD alone might not be a sustainable irrigation method because of greater C and N losses, biochar addition could alleviate these undesirable effects via depressing SOC and SON mineralization. Biochar amendment, especially WSP combined with PRD, could be a promising practice to increase maize growth and water-use efficiency while sustaining C and N retention in the soil-plant systems.Highlightscenter dot Effects of biochar addition and irrigation regimes on C and N retention in the soil-plant systems of maize were investigated.center dot Biochar increased plant N retention and maize growth. Partial root-zone drying (PRD) irrigation increased soil respiration rate and soil organic C and N mineralization.center dot Biochar addition combined with PRD improved maize growth, water-use efficiency, and sustained C and N retention in the soil-plant systems.
AB - Biochar influences soil biophysicochemical processes and nutrient availability, yet the effects of different biochar and soil water dynamics on carbon (C) and nitrogen (N) retention in the soil-plant systems remain unknown. Maize plants were grown in split-root pots filled with clay loam soil amended with wheat straw pellet biochar (WSP) and softwood pellet biochar (SWP) at 2% (w/w) and were either irrigated daily to 90% of water-holding capacity (FI) or irrigated with 70% volume of water used for FI to the whole root-zone (DI) or alternately to half root-zone (PRD) from the fourth leaf to grain-filling stage. Compared to the unamended controls, biochar amendment enhanced plant biomass and water-use efficiency, particularly when combined with PRD. Although the WSP amendment tended to decrease soil net N mineralization rate, it significantly increased C and N retention in the soil-plant systems. Compared to DI, PRD significantly increased soil respiration rate while lowering soil total organic C content. Moreover, PRD increased soil inorganic N content, which might be related to increased mineralization of soil organic C (SOC) and soil organic N (SON). Such effects might implicate that PRD outperformed DI in enhancing the mineralization of soil organic matter. Although PRD alone might not be a sustainable irrigation method because of greater C and N losses, biochar addition could alleviate these undesirable effects via depressing SOC and SON mineralization. Biochar amendment, especially WSP combined with PRD, could be a promising practice to increase maize growth and water-use efficiency while sustaining C and N retention in the soil-plant systems.Highlightscenter dot Effects of biochar addition and irrigation regimes on C and N retention in the soil-plant systems of maize were investigated.center dot Biochar increased plant N retention and maize growth. Partial root-zone drying (PRD) irrigation increased soil respiration rate and soil organic C and N mineralization.center dot Biochar addition combined with PRD improved maize growth, water-use efficiency, and sustained C and N retention in the soil-plant systems.
KW - Biochar
KW - Drying/wetting cycles
KW - C and N retention
KW - Isotope composition
KW - Mineralization
KW - GREENHOUSE-GAS EMISSIONS
KW - NITROGEN-RETENTION
KW - MICROBIAL ACTIVITY
KW - MYCORRHIZAL FUNGI
KW - NATURAL-ABUNDANCE
KW - CARBON
KW - IMPACT
KW - YIELD
KW - NUTRITION
KW - ISOTOPES
U2 - 10.1007/s42729-023-01223-5
DO - 10.1007/s42729-023-01223-5
M3 - Journal article
VL - 23
SP - 1576
EP - 1588
JO - Journal of Soil Science and Plant Nutrition
JF - Journal of Soil Science and Plant Nutrition
SN - 0718-9516
ER -
ID: 347485003