湖北省土壤供钾状况与钾肥区划  

Siul potassium supplying characteristics and potassium regionalism in Hubei

作　　者：陈防[1] 龙成凤[1] 陈行春 宁昌会 鲁剑巍[1] 许幼生 

机构地区：[1]湖北省农科院土肥所,湖北省农牧业厅土肥站,华中农业大学土化系,华中农业大学

出　　处：《湖北农业科学》1995年第4期28-34,共7页Hubei Agricultural Sciences

摘　　要：近年研究结果表明，全省耕作土壤中各种形态钾含量的变幅是旱地大于水田，全钾含量是水田高于旱地，而缓效钾和速效钾含量是旱地高于水田。由于耕作土壤各种形态钾素含量都有不同程度的下降，所以各种作物当季施钾效果和钾肥后效逐步明显，钾肥与一些微量元素配施亦表现出明显的增产效果。钾肥区划中全省共分为７个一级区和１８个二级区（亚区），并对各区进行了概述。Summarized the research result of soil K supplying characteristics of Hubei inlast years.The alterative rate of different forms of soil K on uplanu was higher than paddysoil.Soil total K content in paddy soil was higher than that in upland,but soil exchangeableand nonexchangeable K content was opposite.Caused by the decrease of soil K ,crops'potassium responses and residue effects of K were increased,potassium and some micronu-trient elements also showed positive interaction.In the soil potassium regionalism ,Hubeiwas divided into 7 regions and 18 subregions,and they were outlined in this paper.

关 键 词：钾肥 区划 施肥量 土壤肥力 湖北 

分 类 号：S158.3[农业科学—土壤学]