小分子有机酸和阳离子对含钾矿物钾素释放的影响  

Effects of different low-molecular weight organic acids and cations on release of potassium from potassium-bearing minerals

作　　者：王瑾[1] 李小坤[1] 鲁剑巍[1] 占丽平[1] 王筝[1] 

机构地区：[1]华中农业大学资源与环境学院/农业部长江中下游耕地保育重点实验室,武汉430070

出　　处：《华中农业大学学报》2013年第3期67-71,共5页Journal of Huazhong Agricultural University

基　　金：国家自然科学基金项目(41001178);公益性行业(农业)科研专项(201203013);华中农业大学新进博士科研启动专项(2009BQ080);中央高校基本科研业务费专项(2011PY150)

摘　　要：采用振荡提取的方法,研究不同浓度的小分子有机酸和阳离子对含钾矿物(黑云母、白云母和正长石)中钾素释放的影响。结果表明:不同小分子有机酸和阳离子均可显著提高黑云母、白云母、正长石中钾素的释放量。与对照处理(去离子水)相比,草酸、柠檬酸、酒石酸和NH4Ac溶液、CaCl2溶液、NaCl溶液、HCl溶液从黑云母中提取的K+量分别增加188.2%、151.6%、149.6%和24.6%、32.6%、3.5%、169.8%;不同溶液从白云母中提取的K+量与对照相比,分别增加211.0%、202.8%、199.4%和81.6%、38.3%、21.7%、169.1%;不同溶液从正长石中提取的K+量与对照相比,分别增加219.0%、206.6%、216.0%和144.1%、27.5%、60.4%、210.9%。同种浸提剂,不同矿物的释钾素量显著不同,表现为白云母>黑云母>正长石,含钾矿物释钾素量随着溶液浓度升高而增加。To provide scientific experience for higher efficient utilization of soil potassium,effects of low-molecular weight organic acids and cations on the release of potassium from different potassiumbearing minerals （biotite,muscovite and orthoclase） by the ways of extracting. The results showed that different low-molecular weight organic acids and cations increased the release of potassium from potassi- um-bearing minerals significantly. Compared to that of the control treatment （H2 O）, the release amount of potassium from biotite using oxalic acid （OA）, citric acid （CA）, tartaric acid （TA）, NH4 Ac, CaClz, NaC1 and H＋ as extractants was increased up to 188. 2%,151.6%,149.6%,24. 6%,32. 6%,3. 5% and 169. 8%,respectively. The release amount of potassium from muscovite using the same solutions as ex- tractants was increased up to 211.0%,202. 8%,199.4%,81.6%,38. 3%,21.7% and 169. 1M,respec- tively. The release amount of potassium from orthoclase was increased up to 219.0 %, 206. 6 %, 216.0 %, 144. 1%, 27.5%, 60.4% and 210. 9%, respectively. Using the same extractant, the release amount of po- tassium was in the order of muscovite〉bitotite〉orthoclase. The release amount of potassium from po- tassium-bearing minerals was increased with the increase of the concentration of the extractant.

关 键 词：小分子有机酸 阳离子 含钾矿物 钾素释放 振荡平衡法 

分 类 号：S153.4[农业科学—土壤学]