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 concentrati...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.展开更多
选用蒙金娜有机培养基,从王草根际分离出21株具有溶磷能力的菌株,利用溶磷圈法和钼锑抗比色法对其解磷能力进行测定。结果显示,21株菌株在蒙金娜有机磷培养基上均形成明显透明圈,其培养48 h D/d值在1.3~7.0之间,72 h D/d值在1.72~5.5之...选用蒙金娜有机培养基,从王草根际分离出21株具有溶磷能力的菌株,利用溶磷圈法和钼锑抗比色法对其解磷能力进行测定。结果显示,21株菌株在蒙金娜有机磷培养基上均形成明显透明圈,其培养48 h D/d值在1.3~7.0之间,72 h D/d值在1.72~5.5之间,120 h D/d值在1.33~4.67之间;用钼锑抗比色法测定溶磷量为4.11~327.1 mg/mL。经解磷能力分析,菌株2-6、2-7-1、2-9、4-4具有较强的解磷能力,这些菌株在后续微生物菌肥研制中具有较大潜力。展开更多
文摘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.
文摘选用蒙金娜有机培养基,从王草根际分离出21株具有溶磷能力的菌株,利用溶磷圈法和钼锑抗比色法对其解磷能力进行测定。结果显示,21株菌株在蒙金娜有机磷培养基上均形成明显透明圈,其培养48 h D/d值在1.3~7.0之间,72 h D/d值在1.72~5.5之间,120 h D/d值在1.33~4.67之间;用钼锑抗比色法测定溶磷量为4.11~327.1 mg/mL。经解磷能力分析,菌株2-6、2-7-1、2-9、4-4具有较强的解磷能力,这些菌株在后续微生物菌肥研制中具有较大潜力。
