长期轮作施肥对棕壤磷素形态及转化的影响  

Effects of Long-term Fertilization on Phosphorus Forms and Transformation in Brown Soil

作　　者：林利红[1] 韩晓日[1] 刘小虎[1] 战秀梅[1] 

机构地区：[1]沈阳农业大学土地与环境学院,辽宁沈阳110161

出　　处：《土壤通报》2006年第1期80-83,共4页Chinese Journal of Soil Science

基　　金：辽宁省自然科学基金项目(972119)资助

摘　　要：对沈阳地区棕壤定位试验地各施肥处理土壤按Hed ley等建议的分级方法进行测定。结果表明,棕壤磷中残留态含量最高,无机磷主要以NaOH-P i和HC l-P i形态存在,有机磷主要以NaOH-Po形态存在,NaHCO3-Po在各组分中所占比例最小。施用有机肥能明显增加潜在活性有机磷(NaOH-Po)的数量。1.0mol L-1HC l浸提的Ca-P i存在着缓慢的动态转化过程,是棕壤中的潜在磷源。Changes in inorganic and organic phosphorus fractions resulted from 24 years of long - term fertilization in Brown soil were studied by using a sequential extraction method. The results showed： Residual - P was the largest fraction of phosphate in Brown soil. NaOH - Pi and HC1 - Pi were the two main fractions of inorganic phosphorus, and NaOH - Po was the main form of organic phosphorus, proportion of NaHCO3 - Po was the smallest in all the fractions . Application of organic fertilizers could obviously raise the contents of the potentially labile organic fraction extracted by NaOH. Calcium associated inorganic phosphorus （Ca- Pi）, extracted by HC1 was potential phosphorus, having a slow dynamic transformation process .

关 键 词：棕壤 长期定位施肥 磷的分级 

分 类 号：S153.67[农业科学—土壤学]