摘要
应用3种农学上土壤有效P的提取法(Bray-1、Olsen和Mehlich-3分别表示为:BP、OP和MP)和3种环境学上土壤中P的提取法(氧化铁试纸法、阴离子交换树脂膜法和蒸馏水直接提取法分别表示为:FP、RP和WP),对30个石灰性潮土土样进行分析测定。结果表明,不同提取剂所测定的土壤P的含量顺序为MP>FP>RP>BP>OP>WP,它们之间是线性相关的,3种农学上土壤P提取法所测定的P含量之间的相关系数(r2)从0.807到0.869;3种环境学上土壤P提取法所测定的P含量之间的相关系数从0.470到0.817;BP和FP、RP、WP之间的相关系数分别为0.808、0.893和0.953,MP和FP、RP、WP之间的相关系数分别为0.783、0.789、0.857,OP和FP、RP、WP之间的相关系数分别为0.755、0.701、0.761。另外,土壤全P和各提取法所测定的P的含量之间也是线性相关的,相关系数从0.703(MP)到0.811(BP);土壤P饱和度(DPS)和各种提取方法所测定的P的含量之间的相关系数从0.639到0.789。
Soil P was analyzed by Bray-1 (BP), Olsen-P (OP), and Mehlich-3 (MP) agronomic tests methods, and by Fe-oxide impregnated filter paper (FeP ), anion-exchange resin membrane (RP), and water (WP) environmental tests meth ods in 30 fluvo-aquic soils, respectively. We have found that the trends of ex tracted P contents by different methods were as follows: MP> FP> RP> BP> OP> WP. Relationships between soil P extracted by the tests were linear, trends were si milar for all the soil samples. Correlation coefficients ranged from0.807 to 0.8 69 among the agronomic test soil P, and from 0.470 to 0.817 among the environmen tal test soil P. While the correlation coefficients between the BP and the envir onmental test soil P were 0.808, 0.893 and 0.953 for FeP, RP and WP, respectivel y. Accordingly, they were 0.783, 0.789 and 0.857 for MP and were 0.755, 0.701 an d 0.761 for OP, respectively. Relationships between soil total P and the test P measured by agronomic and environmental methods were also linear, and the correl ation coefficients ranged from 0.703 (the lowest for MP) to 0.811 (the highest f or BP). Relationships between the degree of the P saturation (DPS) were linear, the correlation coefficients were ranged from 0.639 to 0.789 for Fluvo-aquic s oils.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2004年第5期1030-1033,共4页
Journal of Agro-Environment Science
基金
国家自然科学基金(40071053)
关键词
农学
环境
土壤P
提取方法
相关系数
agronomy
environment
soil phosphorus
extracted methods
corre lation coefficient
