摘要
采用无机磷固体培养基从甘肃省河西高钙土中分离出具有解磷能力的菌株16株,测定了各初选菌株溶磷能力。16株溶磷菌株的D/d值（溶磷圈直径D与菌落直径d的比值）范围在1.24-5.4之间,有效溶磷量在7.6-356.2 mg/l之间,均具有一定溶磷作用。其中,P3-16、P3-28菌株在液体培养条件下的有效溶磷量均显著高于其他菌株,解磷率达7.22%、6.67%,为进一步研制适合高钙土土壤环境的磷细菌肥料提供优质菌种。
Sixteen phosphate-solubilizing micro-organisms were separated from high calcium soil in Hexi corridor in Gansu Province by abio-phosphor solid culture medium, and their ability of dissolving phosphorus was measured. The ratio of D/d （ratio of diameter of phosphorus-dissolving circle to diameter of bacteria communi- ty） varied from 1.24 to 5.4, and available quantity of dissolving phosphorus changed from 7.6 mg/L to 356.24 mg/L, which showed those phosphate-solubilizing micro-organisms had ability of dissolving phosphors. In condition of liquid cultivate, P3 - 16 and P3 - 28 had higher available quantity of dissolving phosphors than other phosphate-solubilizing micro-organisms, and the ratio of dissolving phosphorus reached 7.22 % and 6.67 % respectively. High quality strains would be offered to further study fertilizer with P bacteria using in high Ca soil.
出处
《干旱地区农业研究》
CSCD
北大核心
2008年第2期7-10,共4页
Agricultural Research in the Arid Areas
基金
甘肃省科技攻关项目“甘肃省主要农作物根际有益微生物的筛选与应用”
甘肃省自然基金项目“河西高钙土高效解磷菌的筛选及其在土壤中溶磷效应的研究”
关键词
解磷菌
高钙土
解磷能力
phosphate-solubilizing micro-organisms
high calcium soil
ability to dissolve phosphorus
