次生盐渍化土壤养分及可溶性盐垂直分布  

Soil Nutrient in Secondary Salinization and Soluble Salt Vertical Distribution

作　　者：杨静[1] 陆晔丰 孙凯文[1,2] 郑雷 钱晓晴[1] 盛海君[1,4] YANG Jing LU Yefeng SUN Kaiwen ZHENG Leia QIAN Xiaoqing SHENG Haijun(Oallege of Environmental Science and Engineering, Yangzhou U＇niversity, Yangzhou, Jiangsu 225127 Jiangsu Huanghai Farm Huanghai Institute of Agricultural Sciences, Yancheng, Jiangsu 224600 Wuxi Yijiakang Institute of Vegetables, Wuxi, Jiangsu 214100 Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing,Jiangsu 210095)

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225127 [2]江苏省黄海农场黄海农科所,江苏盐城224600 [3]无锡益家康蔬菜研究所,江苏无锡214100 [4]江苏省有机固体废弃物资源化协同创新中心,江苏南京210095

出　　处：《北方园艺》2016年第23期171-174,共4页Northern Horticulture

基　　金：江苏省农业三新工程资助项目(SXGC[2016]327);江苏省产学研前瞻性联合研究资助项目(BY2015061-05)

摘　　要：土壤次生盐渍化问题日益严重,对农业发展构成严重威胁。以大棚蔬菜土壤为试材,采用田间取样分析方法,研究了次生盐渍化土壤养分、可溶性盐含量、组成及其垂直分布特点。结果表明:次生盐渍化土壤养分主要集中在土壤表层0~10cm处,随着土层的加深,有机质呈先下降后增加的趋势,速效氮、速效磷、速效钾含量呈递减趋势;可溶性盐含量随土壤深度的增加呈下降趋势,表层(0~10cm)含量最高,10cm以下各土层可溶性盐分含量显著减少;表层土壤(0~10cm)可溶性盐分离子主要为Ca^(2+)和NO_3^-,分别占阳离子总量的59.71%和阴离子总量65.95%。The problem of soil secondary salinization is getting worse, seriously threatening the development of agriculture. Greenhouse vegetables soil was used as test materials, field sampling was carried out, in combination with analytical methods, the content and composition of nutrient sand soluble salts was determined,as well as their vertical distribution characteristics in soils with secondary salinization. The results showed that the nutrient in secondary salinized soils mainly concentrated in the 0-10 cm surface layer. With the decrease of soil depth,the organic matter first increased and then decreased,while available N,P and K showed a tendency of decrease. Similar pattern was observed for soluble salts which decreased along soil depth, with the highest soluble salt content detected in surface layer（0-10 cm）, followed by a significant decrease from 10 cm downwards. Ca2＋ and NO3 were the major soluble salt ions in the surface layer,accounting for 59.71% of the total cations and 65.95% of the anions respectively.

关 键 词：次生盐渍化 养分 可溶性盐 垂直分布 

分 类 号：S156.41[农业科学—土壤学]