中国农业科学2025，Vol.58Issue(20)：4203-4215,13.DOI:10.3864/j.issn.0578-1752.2025.20.013
冬绿肥提升滨海盐碱土团聚性及植物源与微生物源有机碳固存
Winter Green Manure Enhances Soil Aggregation and Plant-and Microbial-Derived Carbon Sequestration in Coastal Saline-Alkali Soils
摘要
Abstract
[Objective]This study aimed to investigate the characteristics of soil aggregation and molecular origins of soil organic matter(SOM)under winter green manure cropping systems,in order to establish a scientific foundation for organic matter sequestration and soil quality improvement in saline-alkali soils.[Method]The field experiment,initiated in 2019 in Huanghua County of Hebei Province,involved four treatments:winter fallow(CK),Orychophragmus violaceus(OV),Triticale(TG),and winter wheat(WW).The relative contributions of SOM from different origins and related factors were elucidated.Three biomarkers-lignin phenols,glomalin-related soil protein(GRSP),and microbial necromass carbon(MNC)-were conducted to quantitatively distinguish plant-and microbial-derived organic matter components.[Result]Green manure generally increased soil organic carbon(SOC)storage by 12.2％-21.8％(only TG showing significant difference)and total nitrogen storage by 22.5％-36.4％compared with CK.Additionally,green manure treatments enhanced the proportion of larger macroaggregates(＞2-8 mm)by 1.9-6.2 times and smaller macroaggregates(0.25-2 mm)by 12.4％-74.6％,relative to CK.The OV,TG,and WW treatments increased the mean weight diameter of aggregates by 26.7％,86.4％,and 113.8％,respectively,compared with CK.The OV,TG,and WW also exhibited a 16.3％,57.3％,and 86.4％higher proportion of water-stable macroaggregates(＞0.25 mm)than that under CK,respectively.Moreover,the OV enhanced concentrations of vanillyl by 37.7％and cinnamyl by 149.7％,compared with CK.The OV,TG,and WW treatments increased total lignin phenols by 74.6％,32.9％,and 38.4％,respectively,relative to CK.Besides,TG had 36.5％higher easily extractable GRSP than that under CK.TG treatment increased total MNC by 60.6％compared with CK.Again,TG had higher contributions of bacterial necromass C(19％),fungal necromass C(38％),and microbial necromass C to SOC(57％),and the contributions of microbial-derived carbon to SOC was higher than that of plant-derived across green manure treatments.[Conclusion]It was concluded that adoption of winter green manure increased soil aggregation and promoted the accumulation of microbial-derived carbon,potentially boosting soil quality and C sequestration in the coastal saline soils.关键词
盐碱土/绿肥/微生物源残体/植物源木质素/团聚体/土壤有机碳固存Key words
saline-alkali soils/green manure/microbial necromass/plant-derived lignin/aggregates/soil organic carbon sequestration引用本文复制引用
靳晓莹,肖柄政,张天津,刘忠宽,冯伟,杜章留..冬绿肥提升滨海盐碱土团聚性及植物源与微生物源有机碳固存[J].中国农业科学,2025,58(20):4203-4215,13.基金项目
国家重点研发计划(2021YFD1900901) （2021YFD1900901）
