变更施肥管理对不同肥力水稻土CH_4排放影响  

Effects of Altered Fertilization on CH_4 Flux from Paddy Soils with Different Fertilities

作　　者：付薇薇[1] 尹力初[1] 张蕾[1] 王泽浩[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：《山东农业科学》2015年第4期71-75,共5页Shandong Agricultural Sciences

基　　金：湖南省研究生科研创新项目(CX2012B287)

摘　　要：基于30年水稻土长期定位试验,在原有定位试验正常进行的前提下,将其中一部分处理变更施肥,得到两种新处理:常量有机肥改为化肥(N-C)、化肥改为常量有机肥(C-N),及两种原有处理:化肥(CF)、常量有机肥(NOM),共4个处理。通过观测一年水稻轮作周期内不同处理的CH4排放通量,研究后续施肥对不同肥力水稻土CH4排放的影响。结果表明:施用有机肥能显著增加CH4排放量,而化肥对CH4排放影响甚小;在不同有机碳水平的水稻土上施用等量相同肥料,有机碳含量高的水稻土更有利于CH4的产生;CH4季节排放与温度有显著相关性,但与水层深度不存在简单的相关关系。Under the premise of keeping original test going on, and based on a 30-year fertilizer experi-ment in paddy soil, this test was conducted through altering some treatments.Four treatments were obtained as the original normal organic material treatment （NOM）, the original chemical fertilizer treatment （CF）, the treatment with normal organic material altered to chemical fertilizer （ N-C） and the treatment with chemical fertilizer altered to normal organic material （ C-N） .The CH4 flux of paddy soil under the four treatments was measured to study the effects of following-up fertilization management on it.The results showed that organic fertilizer could significantly increase the CH4 flux, while chemical fertilizer had little effect on it.CH4 flux also had a positive relationship with the increase of organic carbon in soil.The annual dynamics of CH4 flux had significant correlation with temperature, but had no simple correlation with water depth.

关 键 词：CH4排放 变更施肥 土壤有机碳 水稻土 环境因素 

分 类 号：S152.6[农业科学—土壤学] S155.292[农业科学—农业基础科学]