摘要
本文研究了独山地区山地黄壤低pH牧地(潮湿成土和干淋溶土)施用石灰对钾的吸附与释放特征,实测吸附曲线与弗来因德利胥(Freundlich)吸附等温式吻合。未施石灰的土壤是一种弱吸钾能力的土壤,评价吸钾能力的参数是根据Fredndlich求出的吸附常数Ke值和吸附自由能△G°值,支配它的土壤性质是pH、Al、Ca和Mg离子。施石灰土壤对吸附钾的解吸能力较强,其等温解吸曲线代表了吸附钾被解吸的过程。
The lower grasslands (Aldic Humaquepts and Pic Paleustalfs) with lime in Dushan County, Guizhou were used for potassium sorption and desorption study in this paper. Freundlich equation is the best one to decribe the Potassium data as judged by their very significant correlation (P<0.05). However, both a single langmuir and Temkin equation are not fit to the Potassium data in this study. Compared with the acid soil, the acid soil is the soil with low capaility of K sorption and liming soil is the soil with high capaility of K sorption. The K sorption of soil as estimated were ΔG° and Kc by Freundlich equation. Relationship between soil properties and K sorption has been examed by simple linear regression analysis. Highly significant (p<0.05) corelations were found with the content of exchange Ca, Mg, Al and PH. K desorption data indicated that the liming soil could be regarded as the soil with high capability of K desorption.
出处
《贵州科学》
1992年第4期48-54,共7页
Guizhou Science
基金
国家自然科学基金
关键词
牧地
石灰
钾
吸附
解吸
土壤
grassland
lime
potassium
sorption
desorption
