不同栽培管理方式下土壤交换性盐基特征差异分析  

Variation Analysis of Soil Exchangeable Bases in Different Cultivation Management

作　　者：聂三安[1,2,3] 葛体达[2,3] 肖和艾[2,3] Kozo Iwasaki 张杨珠[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128 [2]中国科学院亚热带农业生态研究所 [3]中科院亚热带农业生态过程重点实验室,湖南长沙410125 [4]日本高知大学农学部

出　　处：《土壤通报》2011年第5期1064-1069,共6页Chinese Journal of Soil Science

基　　金：国家自然科学基金(40901124);"十一五"国家科技支撑项目(2008BADA7B00;2008BADA7B01)资助

摘　　要：为探讨不同栽培管理方式下土壤交换性盐基含量的特征,采用NH4OAC(pH 7.0)浸提-原子吸收分光光度法测定分析了上海郊区大棚及露地栽培体系下有机和常规农业生产系统中土壤不同土层交换性盐基离子(K,Na,Ca,Mg)含量。结果表明,各盐基离子浓度为Ca>Mg>Na>K,有机园艺生产系统K、Na、Ca和Mg/K值及盐基总量(SEB)高于常规生产方式。露地有机园艺管理耕作层各盐基离子浓度高于常规管理,大棚有机生产方式下各盐基含量均显著高于常规生产方式(P<0.05),但容易引起土壤酸化。统计分析结果表明,不同园艺生产系统对Na、Ca和Mg/K值具有显著性影响,且大棚条件下更为明显。因此,不同园艺生产系统的管理方式改变了土壤盐基离子分布及其特性。The aim of this work was to investigate the influence of different management practices on the characteristics of soil exchangeable bases（K＋,Na＋,Ca2＋,Mg2＋） in the cultivation soils,which were extracted with NH4OAC（pH 7.0） and determined by atomic absorption spectrophotometer（AAS）.Soils under greenhouse and open field cultivation were sampled from the fields in Shanghai,China,where organic farming had been conducted for three years or conventional faming had been carried out in the same area.The results showed that exchangeable bases followed the series of Ca Mg Na K.And K,Na,Ca,Mg/K ratio and total exchangeable bases（SEB） were superior to organic cultivation management.Soil exchangeable bases represented a higher level under greenhouse condition,which could create soil ecosystem environment such as soil acidification,although this level was only available in cultivated horizon（0-20 cm） under open field condition.ANOVA revealed that cultivation management had a significant impact on the content of soil exchangeable Na,Ca,and Mg/K ratio,especially under greenhouse condition.We concluded that the distribution and characteristics of soil exchangeable bases changed significantly under different cultivation management.

关 键 词：园艺生产系统 交换性盐基 土层深度 土壤生态环境 

分 类 号：S1[农业科学—农业基础科学]