干旱地区农业研究2025，Vol.43Issue(4)：70-78,9.DOI:10.7606/j.issn.1000-7601.2025.04.08
生物炭施用量对砂姜黑土团聚体特征及有机碳分布的影响
Effects of biochar application rates on agglomerate characteristic and organic carbon distribution in Shajiang black soil
摘要
Abstract
In this study,the effects of biochar application rate on soil aggregate stability and organic carbon distribution in Shajiang black soil were investigated,and the results can provide scientific support for improving the quality and soil structure of Shajiang black soil.Four treatments,CK(no biochar),B1(1％biochar,biochar ac-counts for 1％of the total weight of biochar and soil,the same below),B3(3％biochar),and B6(6％biochar)were set up in a soil column incubation test using Shajiang black soil as the experimental material.The results showed that,compared with CK,B3 and B6 treatments significantly increased the 1～2 mm agglomerate content by 57.89％to 78.95％.B6 treatment significantly increased the>2 mm agglomerate content by 44.44％,but decreased the<0.053 mm agglomerate content.Compared to CK,B3 treatment significantly increased mean weight diameter(MWD)and geometric mean diameter(GMD)by 16.25％and 22.64％,respectively,and B6 treatment signifi-cantly increased the>0.25 mm agglomerate content(R0.25),MWD,and GMD by 6.15％,23.75％,and 33.96％,respectively,but decreased fractal dimension(D)by 5.44％.Compared to CK,B3 and B6 treatments significantly promoted total soil organic carbon(SOC)accumulation by 66.37％and 162.85％,respectively.B1 and B3 treat-ments significantly increased the organic carbon contribution of the<0.053 mm aggregates by 105.45％and 74.88％,respectively,while the B6 treatment significantly increased the organic carbon contribution of 1～2 mm aggregates by 59.46％.Different biochar application rates treatments significantly increased the organic carbon con-tent of the<0.053 mm agglomerates as B6>B3>B1 and significantly increased the easily oxidized organic carbon(EOC)content of the 0.5～1 mm and the 0.053～0.25 mm agglomerates.SOC exhibited a significant positive corre-lation with R0.25,GMD,and MWD,while it had a significant negative correlation with D value(P<0.05).In con-clusion,the application of 3％and 6％biochar significantly promoted the formation of water-stable macroaggregates as well as the increase of SOC and EOC content,which improved the soil structure,enhanced the soil quality,and facilitated the abatement of obstacle factors in Shajiang black soil.关键词
生物炭/土壤团聚体/土壤有机碳/易氧化有机碳/砂姜黑土Key words
biochar/soil aggregate/soil organic carbon/easily oxidized organic carbon/Shajiang black soil分类
农业科技引用本文复制引用
何小妹,江昱琳,张洛涵,高磊,孔海燕..生物炭施用量对砂姜黑土团聚体特征及有机碳分布的影响[J].干旱地区农业研究,2025,43(4):70-78,9.基金项目
国家自然科学基金(32101316) （32101316）
安徽省教育厅高校中青年教师培养行动项目(YQYB2023002) （YQYB2023002）
