磷细菌对复垦土壤磷素流失风险的影响

发布时间：2019-03-25 18:14

【摘要】：以实验室筛选的溶磷能力最强的磷细菌W37为试验菌株,采煤沉陷区复垦土壤为供试土样,通过盆栽试验研究施用磷细菌对复垦土壤磷素养分、油菜产量、磷吸附特性及流失风险的影响。结果表明:磷细菌可以提高复垦土壤有效磷(Olsen-P)含量和油菜产量;施用磷细菌后复垦土壤最大吸磷量(Xm),吸附常数(k)都减小;磷细菌处理易解吸磷(RDP)、磷零点吸持平衡浓度(EPC0)及磷素饱和度(DPS)呈增加的趋势,分别比M处理增加0.014mg·L~(-1),6.54ug·L~(-1),0.80%;通过估算复垦土壤Olsen-P、EPC0、DPS的环境风险值为28.52mg·kg~(-1),129.78ug·L~(-1),5.18%,本试验中磷细菌处理土壤Olsen-P、EPC0、DPS远小于风险值,因此复垦土壤上施用磷细菌对磷素流失风险影响较小。
[Abstract]:The experiment was carried out to study the effect of phosphorus bacteria on the phosphorus quality of reclaimed soil, the yield of rape, the characteristics of phosphorus adsorption and the risk of loss by pot experiment. The results showed that the phosphorus bacteria can improve the effective phosphorus (Olsen-P) content and the yield of the rape, and the maximum phosphorus uptake (Xm) and the adsorption constant (k) of the reclaimed soil after the application of the phosphorus bacteria are reduced; the phosphorus bacteria treatment is easy to desorb the phosphorus (RDP), The environmental risk values of Olsen-P, EPC0 and DPS of the reclaimed soil were 28.52 mg 路 kg ~ (-1), 129.78 ug 路 L ~ (-1) and 5.18%, respectively. The DPS is much less than the risk value, so the effect of the application of phosphorus on the reclamation of the soil on the risk of phosphorus loss is small.
【作者单位】：安顺学院资源环境与工程学院;山西农业大学资源环境学院;
【基金】：国家自然科学基金项目(31272257) 贵州省科技厅、安顺市人民政府、安顺学院三方联合基金黔科合LH字(2016-7280号);贵州省科技厅、安顺市人民政府、安顺学院三方联合基金黔科合LH字(2014-7515号)资助山西省科技攻关项目(20121101009-4)
【分类号】：S154.3

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