潮土区农田土壤肥力的变化趋势  

The change of farmland soil fertility in fluvo aquic soil district of China

作　　者：张金涛[1] 卢昌艾[1] 王金洲[1] 单鹤翔[1] 徐明岗[1] 任意[2] 田有国[2] 

机构地区：[1]中国农业科学院农业资源与农业区划研究所,农业部植物营养与养分循环重点实验室,北京100081 [2]全国农业技术推广服务中心,北京100125

出　　处：《中国土壤与肥料》2010年第5期6-10,共5页Soil and Fertilizer Sciences in China

基　　金：科技基础性工作专项“农田长期试验资料的深加工与整编”(2007FY220400);国家“973”课题“典型区域减肥增效与农田可持续利用途径与模式”(2007CB109308)

摘　　要：自1986年起,农业部全国农业技术推广服务中心在全国典型潮土区开展了耕地土壤的肥力动态监测,以了解潮土区耕地地力的动态变化趋势。1987～2006年的土壤肥力动态监测结果表明,潮土区土壤有机质和全氮含量均有所增加,1987～1997年全国潮土区土壤有机质和全氮含量年均分别增加2.04%和2.59%;1998～2006年全国潮土区土壤有机质含量年均分别增加0.62%,全氮含量年均降低0.39%;土壤有效磷和速效钾含量年均增加0.77%～1.47%和1.61%～2.73%;土壤pH值降低0.28个单位,有酸化的趋势。随着潮土区土壤有效磷和速效钾含量的快速上升,说明可以适当降低磷、钾肥的施用量。Since 1986,National Agro-Tech Extension and Service Center of China,Ministry of Agriculture has carried out a dynamic monitoring on the farmland soil fertility in fluvo aquic soil district.The soil fertility survey indicated from 1987 to 2006：The soil organic matter and total nitrogen content increased on the whole.The soil organic matter increased 2.04% and 0.62% annually from 1987 to 1997 and from 1998 to 2006,respectively;Total nitrogen content increased 2.59% and decreased 0.39% annually from 1987 to 1997 and from 1998 to 2006,respectively;Soil olsen-P and available K content increased by 0.77%～1.47% and 1.61%～2.73% annually;Soil pH value decreased 0.28 indicating the tread of soil acidification.With the rapidly increasing rate of soil olsen-P and available K content in the past 20 years,the phosphorus and potassium fertilizers could be reduced properly.

关 键 词：潮土 耕地地力 国家土壤肥力监测点 

分 类 号：S158[农业科学—土壤学]