不同施肥结构对稻田土壤CEC和土壤酸性的影响  

Effects of Different Fertilization Systems on Soil CEC and Soil Acidity in Paddy Field

作　　者：林志灵[1] 王静[1] 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

出　　处：《土壤通报》2011年第1期42-45,共4页Chinese Journal of Soil Science

基　　金：国家"十一五"科技支撑计划(2008BADA7B02)

摘　　要：以湖南省6个土壤肥力与施肥效益监测基地持续18年定位肥料试验为平台,研究了不同施肥处理对稻田土壤CEC和土壤酸性的影响。研究结果表明:常年单施化肥并没有显著降低土壤的pH,有机无机配施能有效的改善土壤酸碱性能;NP、NPK以及有机无机肥配合施用均能显著增大土壤的阳离子交换量,尤以有机无机配合施用的效果最佳;在单施化肥的情况下,土壤交换性氢、铝的含量均随交换性酸总量的增加而增加,但交换性铝增加迅速,交换性氢增加缓慢;有机无机配施处理能够增加土壤交换性酸的含量,且交换性铝的相对比例随有机质增加而减小,交换性氢则呈相反变化。由此得出,有机无肥配合施肥结构是其中农业生产可选择的最佳措施。An experiment based on 18 years＇ fixed-site fertilizer experiments was carried out in paddy soil in six Counties of Hunan Province to study the effects of different fertilization systems on soil CEC and soil acidity.The results showed that treatments of long-term single applying chemical fertilizers had no significant influence on decreasing soil pH.However,organic-inorganic fertilization had a significant influence on improving soil pH.Treatments of NP,NPK and organic-inorganic fertilization promoted the amount of soil CEC,especially the treatment of integrated fertilization.Under the treatments of single applying chemical fertilizers,soil E-Al3＋ and E-H＋ increased with the increase of EA,and soil E-Al3＋ increased rapidly,E-H＋ increased slowly.The amount of EA increased under the treatment of organic-inorganic fertilization,and the more organic matter existed,the lower percentage of soil E-Al3＋ had,while soil E-H＋ was contrary to E-Al3＋.Consequently,the treatments of organic-inorganic fertilization were the best fertilization systems to apply in the agricultural production.

关 键 词：施肥结构 pH CEC 交换性酸 交换性铝 

分 类 号：S153.4[农业科学—土壤学]