江苏农业学报2025，Vol.41Issue(1)：61-67,7.DOI:10.3969/j.issn.1000-4440.2025.01.008
滨海盐碱地绿肥粉垄耕作耦合对土壤有机碳积累及组分的影响
Effects of green manure and smash ridging coupling on soil organic carbon accumulation and composition in coastal saline alkali land
摘要
Abstract
In order to clarify the role of green manure and smash ridging coupling in improving saline-alkali soil,a field experiment was conducted to investigate the effects of green manure and smash ridging coupling on soil organic carbon accumulation and composition in the coastal saline-alkali soil.Six treatments were set up:bare land+no tillage(CK),bare land+conventional tillage 15 cm(T1),bare land+smash ridging tillage 30 cm(T2),planting hairy vetch and removing them from the field+conventional tillage 15 cm(T3),planting hairy vetch and returning them to the field+conventional tillage 15 cm(T4),planting hairy vetch and returning them to the field+smash ridging tillage 30 cm(T5).The basic physical and chemical properties were determined by collecting soil samples from 0－20 cm soil layer after planting one season of corn.The water stable aggregates,and changes in aggregate organic carbon and characteris-tics of soil organic carbon accumulation and composition were analyzed.The results showed that compared with the CK,plant-ing hairy vetch and turning over could significantly promote the accumulation of organic carbon,increase soil organic carbon content,and improve soil organic carbon composition in saline-alkali soil.Compared with the CK,the soil bulk density of T5 treatment was significantly reduced,and soil alkaline nitrogen content,organic matter content,organic carbon content and or-ganic carbon storage were significantly increased.Among them,the soil organic carbon content was increased by 32.9%.Soil soluble organic carbon content,readily oxidizable organic carbon content and microbial biomass carbon content were signifi-cantly increased.Moreover,the weight percentage of>2.000 mm and 0.251－2.000 mm soil aggregates increased,while the weight percentage of 0.050－0.250 mm and<0.050 mm soil aggregates decreased.T5 treatment increased the content of organ-ic carbon in water-stable aggregates and the contribution rate of organic carbon in aggregates.It can be seen that the coupling of green manure and smash ridging tillage can significantly increase the content of soil organic carbon and active components in coastal saline-alkali land,effectively increase the proportion of soil water-stable macroaggregates and the content of organic carbon in soil aggregates and the contribution rate of organic carbon.Therefore,the promotion and application of this tillage method in coastal saline-alkali land can promote the accumulation of soil organic carbon,so as to improve the soil carbon se-questration in coastal saline-alkali land and enhance the quality of cultivated land.关键词
滨海盐碱地/绿肥粉垄耕作耦合/有机碳/土壤团聚体Key words
coastal saline-alkali land/green manure and smash ridging coupling/organic carbon/soil aggregates分类
农业科技引用本文复制引用
洪立洲,王同,邢锦城,乔干群,刘冲,张振华,郁凯,董静,朱小梅,陈环宇..滨海盐碱地绿肥粉垄耕作耦合对土壤有机碳积累及组分的影响[J].江苏农业学报,2025,41(1):61-67,7.基金项目
江苏省碳达峰碳中和科技创新专项资金项目(BE2022304) （BE2022304）
