植物营养与肥料学报2023，Vol.29Issue(12)：2232-2246,15.DOI:10.11674/zwyf.2023216
喀斯特湿地转变为农用地对土壤有机硫形态及芳基硫酸酯酶活性的影响
Effects of natural wetland conversion to farmland on soil organic sulfur forms and arylsulphatase activities in karst areas
摘要
Abstract
[Objectives]Soil organic sulfur forms and arylsulphatase activities are sensitive to the changes of soil sulfur pool.We compared the soil organic sulfur forms and arylsulphatase activity characteristics of the main land use types derived from the natural karst wetland,to assess the sustainability of land use types.[Methods]The study was carried out in a typical karst wetland area in Guilin City,Guangxi Zhuang Autonomous Region of China.Soil samples were taken in the natural marsh wetland(CK),and the derived paddy field,upland,orchard,breeding land and abandoned land,at depths of 0-10,10-20,20-30 and 30-40 cm for the analysis of organic sulfur forms and arylsulphatase activities,respectively.[Results]1)Compared with CK,soil total S stocks,the contents of ester bonded sulfur,carbon bonded sulfur and residual sulfur showed decreasing in the other five land use types.The carbon bonded sulfur,ester bonded sulfur,and residual sulfur accounted for 39.08%-63.54%,22.91%-34.28%,and 13.55%-28.46%of the organic sulfur,respectively.The ester bonded sulfur and residual sulfur proportions in the soils under five land use types were lower than CK,and the carbon bonded sulfur proportion was higher than CK(P<0.05).2)The soil organic and total S content in CK ranged 158.4-442.2 mg/kg and 180.2-510.8 mg/kg.The average total S in CK was 345.5 mg/kg,lower than that of the world(700 mg/kg).The average organic and total S contents in the 0-40 cm soil layers under the five land use types were all significnatly different from those of CK,and declined in the order of CK>paddy field>upland>breeding land>orchard>abandoned land.3)The arylsulphatase activities decreased with the increasing of soil depth under all the land use types.Compared with CK,the soil arylsulphatase activities of the five land types decreased by 18.19%(paddy field),27.48%(upland),39.72%(orchard),33.81%(breeding land),and 51.77%(abandoned land),respectively.[Conclusions]The reclamation of natural marsh wetlands leads to the decrease of soil total and organic sulfur contents significantly(P<0.05).The average soil total sulfur content under the five land use types(98.06-222.9 mg/kg)is lower than that of soils at tilling layer in 10 provinces(299 mg/kg)in southern China.Soil organic carbon,total nitrogen,soil water content and arylsulphatase are the main factors causing the proportion change of soil organic sulfur forms.Therefore,controlling the reclamation scale of karst wetland is important for maintaining the balance of soil nutrients and ecosystem health of the Huixian karst wetland in the long run.关键词
土壤硫/有机硫形态/芳基硫酸酯酶/土地利用方式/喀斯特湿地Key words
soil sulfur/organic sulfur forms/arylsulphatase activity/land use type/karst wetland引用本文复制引用
陈运霜,沈育伊,曹杨,王紫卉,徐广平,孙英杰,黄科朝,滕秋梅,毛馨月..喀斯特湿地转变为农用地对土壤有机硫形态及芳基硫酸酯酶活性的影响[J].植物营养与肥料学报,2023,29(12):2232-2246,15.基金项目
国家自然科学基金项目(42267007) （42267007）
广西漓江流域景观资源保育与可持续利用重点实验室研究基金项目(LRCSU21K0203) （LRCSU21K0203）
广西科学院基本科研业务费(CQZ-E-1912) （CQZ-E-1912）
广西自然科学基金项目(2020GXNSFBA297048,2018GXNSFAA050069) （2020GXNSFBA297048,2018GXNSFAA050069）
广西喀斯特植物保育与恢复生态学重点实验室基金项目(22-035-26). （22-035-26）
