结晶有机肥对土壤磷吸附和解吸特性的影响  

The Effect of Crystal Organic Fertilizer on Adsorption desorption Properties of Soil Phosphorus

作　　者：刘义新[1] 刘武定[1] 朱端卫[1] 程东升[1] 

机构地区：[1]华中农业大学资源环境与农业化学系,武汉430070

出　　处：《华中农业大学学报》2000年第1期22-24,共3页Journal of Huazhong Agricultural University

基　　金：国家烟草专卖局 980 177基金资助项目

摘　　要：以不同用量的结晶有机肥 (暂定名 )处理土壤 ,培养 1月后 ,研究了它们对土壤磷吸附与解吸特性的影响。结果表明结晶有机肥能降低土壤对磷的吸附 ,表现为施用该肥料的土壤 ,磷等温吸附的Langmuir方程常数 (K值 )减小 ,土壤对磷的亲和力减弱 ,且随着结晶肥用量的增加 ,这一效应更加明显。与吸附相反 ,结晶有机肥能促进土壤磷的解吸 ,土壤磷的解吸量与结晶有机肥用量呈正相关 ,且起始磷浓度较低时 ,结晶有机肥增加磷解吸的效果更显著。此外 ,研究结果表明 ,随结晶有机肥用量的增加 ,土壤的Olsen P也明显增加 。The crystal organic fertilizer was applied into the experimental soil at different level and the soil was cultured for one month to study the effect of crystal organic fertilizer on adsorption desorption property of soil phosphorus. The results showed that the application of crystal organic fertilizer significantly decreased the adsorption of phosphate to the soil, and reduced constant K of the Langmuir equation as the level of crystal fertilizer was increased. The application of crystal organic fertilizer also increased the desorption of phosphate, and it had a greater effect on the desorption of phosphate adsorbed in high affinity site which was difficult to be desorbed. There was an important role in the improvement of the phosphate availability by application of the crystal fertilizer. In addition, the Olsen P of soil was significantly increased as the level of crystal fertilizer was increased.\;

关 键 词：结晶有机肥 土壤磷 吸咐-解吸 有机肥 

分 类 号：S153.61[农业科学—土壤学] S145.5[农业科学—农业基础科学]