生物炭-氮肥配施对东北黑土团聚体及有机碳含量的影响

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关键词：生物炭；氮肥；黑土；团聚体；有机碳含量

doi：10.13304/j.nykjdb.2024.0007

中图分类号：S156 文献标志码：A 文章编号：1008-0864（2025）06-0195-10

Effects of Combined Application of Biochar and Nitrogen Fertilizer on Aggregate and Organic Carbon Content of Black Soil in Northeast Chin：

QING Fu 1，2 ， LIANG Hongyue1，2.3，SUN Jing4 ， LU Xinrui²，LIANG Yunjiang1*

（1.ColegeofAgriculture，YanbanUniversity，JilinYanji33o2，China;.NortheasIstituteofGeogaphyandAgrocolog，Chinses AcademyofSciences，Changhun3Ol0，China；3.YanbianAgriculturalMeteorologicalExperimentalStationilin Yanji 133001，China;4.Huazhong Agriculture University，Wuhan 43o070，China）

Abstract：Inordertoimprove soil structureand enhancesoil fertilityinthe black soilarea，thelong-term positioning experiment intheblack soilarea wasusedas theresearch platformto studytheefectsof thecombinationof biochar and nitrogen fertilizeronsoil aggregateandorganiccarboncontent，and to explore the maximum influencing factors. 3biocharlevelsof10（C1），20（C2）and 50g∙kg-1 （C3）were set，and 3nitrogen fertilizerlevelsof O（NO），300 （N1）and 600 kg·hm -2 （N2）were set. The results showed，compared with CK，the soil bulk density decreased by （2号 2.73% ＼～8.20%，and the soil water content increased by 1.04% 31.24% ，with no significant difference among all treatments. The combination application of biochar and nitrogen promoted the transformation of <0.053 mm aggregate to ⩾2 mm aggregate.The aggregate stability was significantly improved，and theaggregate mass ratio（ R0.25 ），mean weight diameter（MWD）and geometric mean diameter（GMD）of soil ≥O.25 mm increased by 25.06% ， 21.71% and 12.50% ，respectively.The organic carbon content of allgrain grades ofaggregates increased，and the organic carbon content of aggregates ⩾2 mm and <0.053 mmincreased significantly，with the increases of 13.19 % 2 54.42% and 13.78% ， 41.34% ，respectively.Principal component analysis（PCA）showed that R0.25 was the key factor affecting soil organic carbon content，and C2N1 treatment was the best application measure to improve the structure of black soil.Aboveresearchresultsprovidedatheoreticalbasis forcurbing thedegradationofblack soilinnortheast China andimprovingsoil fertility. Key words：biochar；nitrogen fertilizer；black soil；aggregate；organic carbon content

黑土由于其性状好、肥力高，被认为是一种适宜耕作的优质土壤。（剩余19590字）