Effect of Lanthanum on Solubilization of Rock Phosphate in Liquid Culture by Aspergillus Niger and Penicillium Oxalicum

作     者：王光华 周德瑞 杨谦 金剑 赵英 

作者机构：Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Northeast (Institute) of Geography and Agricultural Ecology Chinese Academy Sciences Harbin 150040 China Technology Extension Center of Heilongjiang Province Harbin 150001 China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2004年第22卷第S1期

页      面：177-180页

核心收录：

学科分类：0710[理学-生物学] 1007[医学-药学(可授医学、理学学位)] 100705[医学-微生物与生化药学] 0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 0708[理学-地球物理学] 0703[理学-化学] 071005[理学-微生物学] 10[医学] 

基　　金：theDirectorFundofNortheastInstituteofGeographyandAgriculturalEcology  ChineseAcademyofSciences  andaPartofChineseNationalAgriculturalKeyProject (2 0 0 1BA0 0 7) 

主　　题：lanthanum rock phosphate phosphate-solubilizing microorganisms phosphate solubilization 

摘      要：Rock phosphate (RP) is a low efficient P fertilizer when directly used in the soil. Phosphate-solubilizing microorganisms (PSMs) can solubilize RP in fermentation or soil condition. The effect of different concentration of lanthanum (La) on the solubilization of RP was investigated by two isolates of phosphate-solubilizing fungi (PSF) Aspergillus niger P39 and Penicillium oxalicum P66 in liquid culture. Experimental results show that relatively higher concentration of La in the culture solution inhibites fungal growth and delays RP solubilizing activity of two isolates. This inhibitory effect of La on RP solubilization varies with PSF (isolate P66 is more sensitive to La than P39 in this experiment). Comparing the pH value of culture media with soluble P content as affected by La application, only within individual isolate not different isolates the negatively significant relationship was observed.