麦玉轮作体系中秸秆钾对土壤钾库平衡的影响  

Effect of Straw Potassium on Balance of Soil K in Wheat/Maize Rotation System.

作　　者：董玉良[1] 劳秀荣[1] 毕建杰[2] 孙伟红[1] 

机构地区：[1]山东农业大学资源与环境学院,泰安271018 [2]山东农业大学农学院,泰安271018

出　　处：《西北农业学报》2005年第3期173-176,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家自然科学基金资助项目(39870524)

摘　　要：应用土壤养分状况系统研究法,对麦玉轮作体系中连续秸秆与NP化肥配施对土壤钾素肥力影响进行长期定位研究.试验表明,秸秆还田对土壤速效钾、非交换钾的影响最大,对矿物钾和全钾的影响很小.在不施任何化学钾肥14～18 a的连续耗竭状态下,秸秆还田能及时补给有效钾的损耗,但却提高了矿物钾的自然释放速率.Effect of successive straw plus NP on soil K content in wheat/maize rotation system was studied according to the system methods from soil nutrition. The results showed that the effect of straw returning on available K and non-exchangeable K were more notable than mineral K and total K. In the exhausted condition of without K for 14-18 years, straw plus NP could supply with available K timely, but speed up the natural release rate of mineral K.

关 键 词：麦玉轮作体系 秸秆还田 钾素肥力 速效钾 非交换钾 

分 类 号：S158[农业科学—土壤学]