摘要
对白浆土在长期施肥条件下磷的吸附与解吸进行了研究。试验结果表明,供试白浆土磷的等温吸附曲线符合langmuir方程,在低磷浓度下其吸磷能力较强,随着磷浓度的增大,吸磷能力减弱。在不同施肥处理中,CK处理的最大吸附量(Xm)最大,OM处理最小,各处理吸附常数(K)值变化较小,均在0.2左右,而Xm变化较大;不同施肥处理总的解吸趋势是一致的,即解吸量随着浓度的增加而增加,而后逐步趋于平稳。施有机肥的处理土壤吸附磷能力降低,但解吸磷能力增强;长期不施肥土壤固磷能力增强。
In this paper, phosphorus sorption and desorption in Albic soil were studied under long- term fertilization. The results indicated that the phosphorus absorption curve of tested soil accords with the formula of langmuir. The capacity of absorbing phosphorus in low concentration was strong, but with the increasing of phosphorus concentration, that of absorbing phosphorus became week. In different fertilization treatment, the maximum phosphorus sorption in no fertilization treatment was the biggest, that of the treament of applying manure was the smallest. The change of eguilibrium constant was little, the value was 0.2 or so, that of the maximum phosphorus sorption was large. The trend of phosphorus sorption in different fertilization treatment was all that the phosphorus sorption capacity increase with the increasing of phosphorus concentration, then become steady. Applying manure made the capacity of absorbing phosphorus decline, but that of desorbing phosphorus enhancd; no fertilization made the capacity of fixing phosphorus to ascend.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2006年第4期40-42,共3页
Soil and Fertilizer Sciences in China
基金
黑龙江省教委项目(9541068)资助
关键词
长期施肥
白浆土
磷
吸附
解吸
long - term fertilization
albic soil
phosphorus
sorption
desorption
作者简介
马艳梅（1975-），女，黑龙江省海伦市人，硕士，主要从事土壤与植物营养的科研和教学工作。
