华北农学报Issue(5)：207-212,6.DOI:10.7668/hbnxb.2014.05.035
河北省潮土长期定位施钾和秸秆还田对农田土壤钾素状况的影响
The Effects of Long Term K Fertilization and Straw Recycling on Soil K Status in Fluvo-aquic Soil of Hebei Province
摘要
Abstract
Long-term field experiment with K fertilization and straw recycling was conducted since 1992 to 2012 in a Fluvo-aquic soil of Hebei Province .The soil total K content ,soil available and slow release K content ,and the soil K balance were examined in the long term experiment to find the effects of K fertilization and straw recycling on soil K status change .The results showed after 20 years continuous treatments of no K fertilization and straw recy-cling,there was no significant change in soil total K content;The treatments of NPSt,NPK and NPKSt significantly increased the soil available K content than the initial of about 44 .2%-79 .1%.And the NPK and NPKSt treat-ments significantly increased the soil slow release K content of about 7 .66%-37 .3%than the initial .There was no significant change for NP treatment in soil available K content ,but the slow release K content for NP and NPSt treat-ments decreased about 20.8,9.8 mg/kg respectively .Only the NPKSt treatment got soil K surplus in the 4 treatments, and 100 kg/ha surplus will increase 2.71,24.4 mg/kg,for soil available K and slow release K content ,respectively . The experiment showed the positive effect of K fertilization and straw recycling on soil K fertility improvement .关键词
长期定位试验/钾肥/潮土/秸秆还田/土壤钾素状况Key words
Long term in-site experiment/Potassium fertilizer/Fluvo-aquic soil/Straw recycling/Soil potassium status分类
农业科技引用本文复制引用
贾良良,韩宝文,刘孟朝,李春杰,邢素丽,孙彦铭..河北省潮土长期定位施钾和秸秆还田对农田土壤钾素状况的影响[J].华北农学报,2014,(5):207-212,6.基金项目
公益性行业（农业）科研专项（201203030）；河北省财政专项；国际植物营养研究所（ IPNI）项目 （）
