太仓市郊大棚菜地土壤盐分累积与分布特征研究
发布时间：2018-10-13 08:55
【摘要】：以太仓市郊大棚菜地土壤为研究对象,研究了太仓市典型大棚菜地土壤盐分累积现状及变化规律。结果表明:太仓市郊大棚菜地土壤全盐含量平均值为3.38 g/kg,已达轻度盐化水平;大棚菜地土壤盐分累积区域分布差异较大,最小值为0.42 g/kg,最大值达12.6 g/kg,变异系数达65.7%;大棚菜地土壤盐分累积量有69.84%超过安全水平,其中51.59%为轻度盐土,10.32%为中度盐土,5.56%为重度盐土;大棚菜地土壤盐分累积分布具有明显的地域性,以浏河镇、沙溪镇和新区发生盐化现象最为严重,盐化土所占比例分别达91.4%、91.0%和83.0%;八大离子组成中,阳离子以Ca~(2+)为主,其次为Na~+和K~+,阴离子以NO_3~ 为主,其次为Cl~ 和SO_4~(2 );相关性分析表明,影响太仓市郊菜地土壤发生盐化的主要因素是全盐含量、NO_3~ 、Cl~ 、Ca~(2+)等指标,造成土壤发生次生盐渍化的主要原因是不合理施肥、种植及管理模式等人为外在因素;太仓市郊菜地土壤盐分含量随着大棚种植年限的增加而显著提高,在种植年限为4~5 a时达到峰值,平均值为3.64 g/kg,是种植年限为1 a的大棚土壤含盐量的1.29倍。
[Abstract]:The present situation and variation of salt accumulation in the soil of vegetable field in Taichang suburb were studied in this paper. The results showed that the average value of total salt content was 3.38 g / kg, which reached the level of slight salinization, and the regional distribution of soil salt accumulation was different. The minimum value was 0.42 g / kg, the maximum value was 12.6 g / kg, the coefficient of variation was 65.7%, the accumulation of salt in greenhouse soil exceeded the safe level, 51.59% was mild salt soil, 10.32% was moderate salt soil, 5.56% was heavy salt soil, and 51.59% was mild salt soil, 10.32% medium salt soil and 5.56% heavy salt soil. The accumulative distribution of soil salt in greenhouse vegetable land was obvious, especially in Liuhe Town, Shaxi Town and New area. The proportion of salinized soil was 91.4% and 83.0%, respectively, and the cations were mainly Ca~ (2). The results of correlation analysis showed that the main factors affecting the salinization of vegetable soil in Taicang suburb were total salt content, NO_3~, Cl~, Ca~ (2) and so on. The main causes of soil secondary salinization were unreasonable fertilization, planting and management patterns, and soil salt content in vegetable fields in the suburbs of Taicang City increased significantly with the increase of greenhouse planting years. The average value was 3.64 g 路kg ~ (-1), which was 1.29 times as much as that of the greenhouse soil.
【作者单位】： 太仓市土壤肥料站;
【基金】：2017年省重点研发计划项目(BE2017380) 2014年太仓市科技计划项目(TC2014NY02) 太仓市农业面源污染综合治理试点项目资助
【分类号】：S156.4
[Abstract]:The present situation and variation of salt accumulation in the soil of vegetable field in Taichang suburb were studied in this paper. The results showed that the average value of total salt content was 3.38 g / kg, which reached the level of slight salinization, and the regional distribution of soil salt accumulation was different. The minimum value was 0.42 g / kg, the maximum value was 12.6 g / kg, the coefficient of variation was 65.7%, the accumulation of salt in greenhouse soil exceeded the safe level, 51.59% was mild salt soil, 10.32% was moderate salt soil, 5.56% was heavy salt soil, and 51.59% was mild salt soil, 10.32% medium salt soil and 5.56% heavy salt soil. The accumulative distribution of soil salt in greenhouse vegetable land was obvious, especially in Liuhe Town, Shaxi Town and New area. The proportion of salinized soil was 91.4% and 83.0%, respectively, and the cations were mainly Ca~ (2). The results of correlation analysis showed that the main factors affecting the salinization of vegetable soil in Taicang suburb were total salt content, NO_3~, Cl~, Ca~ (2) and so on. The main causes of soil secondary salinization were unreasonable fertilization, planting and management patterns, and soil salt content in vegetable fields in the suburbs of Taicang City increased significantly with the increase of greenhouse planting years. The average value was 3.64 g 路kg ~ (-1), which was 1.29 times as much as that of the greenhouse soil.
【作者单位】： 太仓市土壤肥料站;
【基金】：2017年省重点研发计划项目(BE2017380) 2014年太仓市科技计划项目(TC2014NY02) 太仓市农业面源污染综合治理试点项目资助
【分类号】：S156.4
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