长期轮作施肥对棕壤钾素动态变化的影响  

Effect of Long-term Rotated Fertilization on Dynamic Change of Potassium in Brown Soil

作　　者：刘红霞[1] 王月[1] 吴正超[1] 韩晓日[1] 付时丰[1] 周崇峻[1] 

机构地区：[1]沈阳农业大学土地与环境学院,沈阳110161

出　　处：《中国农学通报》2006年第3期229-233,共5页Chinese Agricultural Science Bulletin

基　　金：国家粮食丰产科技工程专题"辽宁省不同生态区玉米高效施肥技术及农田地力培育研究"(2004BA520AA01-4);辽宁省自然科学基金"棕壤主要营养元素的生物有效性及其综合指标研究"(972119)项目资助。

摘　　要：通过25年长期定位施肥,研究大豆玉米轮作对棕壤钾素动态变化的影响。结果表明:各处理土壤速效钾和缓效钾含量的年份间差异均表现为大豆年份>玉米年份(1992>1993年,2002>2003年),矿物钾为大豆年份<玉米年份。长期没有钾肥施入的CK,N1和N1P3处理土壤中各形态钾素均呈逐年下降趋势,下降幅度年份间相比:速效钾和缓效钾为玉米年份>大豆年份,矿物钾为玉米年份<大豆年份。长期施钾各处理土壤速效钾呈逐年上升趋势;缓效钾从1992年起呈逐年下降趋势;矿物钾玉米年份间呈逐年上升趋势,大豆年份间呈逐年下降趋势。四年土壤速效钾和缓效钾的相关统计分析表明随着种植年限的增加土壤速效钾和缓效钾之间的相关显著性不变。The influence on the dynamic change of the brown soil K when soybean and maize are cropped by rotation is researched through 25 years long-term localization experiment. The result indicates： in each processing the change tendency of content of available potassium and slow release potassium for the soybean year all disappears to be larger than that for the maize year （1992〉1993year,2002〉2003year）,the content of mineral potassium for the soybean year is less than that for the maize year. When CK, N1 and N1P three disposal are not fertilized with K chronically in soil various shapes K all assumes year by year drops, the drop scope of available and slow release potassium for the maize year is quicker than that for the soybean year, the mineral potassium for the maize year is slower than that for the soybean year. For a long-term executing the K in each processing the content of available potassium assumes rise tendency year by year; the content of slow release potassium assumes drop tendency year by year from 1992; the content of mineral potassium assumes rise tendency for maize year and drop tendency for soybean year. Four years related statistical analysis indicates correlation notability is invariable along with between the planting fixed number of years increase between soil available and slow release potassium.

关 键 词：长期轮作施肥 棕壤 钾素 动态变化 

分 类 号：S158[农业科学—土壤学]