长沙市郊露天菜地土壤肥力状况研究  

Status of Soil Fertility in Open Vegetable Fields in the Suburb of Changsha City

作　　者：雷盼[1] 张杨珠[1] 黄运湘[1] 廖超林[1] 杨甲华[1] 和利钊[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128

出　　处：《湖南农业科学》2012年第3期47-49,52,共4页Hunan Agricultural Sciences

基　　金：国家"十一.五"科技支撑计划项目(2009BADC6B005-5;2008BADA7B02)

摘　　要：通过野外采样和室内分析，研究了长沙市郊5个露天菜地土壤的肥力特征和酸化特征。结果表明：5个菜地的土壤肥力水平均较高，有机质、氮、磷含量均很丰富，但有不同程度的富磷、缺钾现象；5个菜地土壤CEC值在7-13cmol／kg之间，平均为10．2cmol／kg，其土壤的保肥性能和酸碱缓冲能力比较弱。土壤出现酸化现象，特别是东湖村土壤属于强酸性土壤，有部分活性Al，＋溶出；5个菜地土壤的盐基主要为交换性ca“，其次是交换性Mg2＋交换性mg2＋，其中交换性ca2＋和交换性Mg2＋二者约占盐基总量的95％，而交换性Na＋的含量微乎其微。Through field sampling and laboratory analysis were performed to study characteristics of soil fertility and acidification in five open vegetable fields in the suburb of Changsha city. The results indicated that these five experimental fields have medium and high level of soil fertility and abundant organic matter, nitrogen and phosphorus, but there are phenomena of rich in phosphate and potassium deficiency with different degrees; CEC in five vegetable fields all ranged from 7 to 13 cmol/kg with an average of 10.2 cmol/kg. Therefore, it means the buffer ability to acid and alkali and ability of fertilizer conservation of soil were weak in the five experimental fields. All of the experimental fields showed acidification, especially the soil in Donghu village showed a strong acid, and already had some active A13＋been stripped; the base in five vegetable fields mainly was exchangeable Ca2＋, followed by exchangeable mg2＋ and exchangeable K＋, and little exchangeable Na＋, in which exchangeable mg2＋ and exchangeable K＋ account for around 95% of total base amount.

关 键 词：菜园土 土壤肥力 土壤酸化 CEC 交换性酸 

分 类 号：S153[农业科学—土壤学]