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为验证不同吸附载体及剂型的溶磷菌剂对土壤磷素状况的改善效果,选择了低磷和高磷两种肥力的土壤进行了室内培养试验。结果表明,对于低磷供试土壤,改善土壤速效磷含量效果较好剂型及配方为:配方4>配方3>液体剂型>配方1>配方2,在土壤培养过程中(30 d、60 d、90 d、120 d),与对照相比土壤速效磷平均含量依次增加11.22 mg/kg、9.43 mg/kg、7.34 mg/kg、4.36 mg/kg和3.38 mg/kg。对于高磷供试土壤,改善高磷土壤速效磷含量效果较好剂型及配方为:配方3>配方1>配方2>配方4,在土壤培养过程中(30 d、60d、90 d、120 d),与对照相比土壤速效磷平均含量依次增加10.37 mg/kg、7.83 mg/kg、3.99 mg/kg和3.08mg/kg,液体剂型的溶磷效果不十分明显。说明对于不同肥力的两种土壤,不同吸附载体配方及剂型的溶磷效果有一定的差异。而且土壤本身的磷素营养状况对于菌剂的溶磷效果也有一定的影响,土壤有效磷的本底值越高菌剂的溶磷效果越不好。
In order to verify the effect of phosphate-solubilizing agents with different adsorbents and dosage forms on the improvement of soil phosphorus status, two kinds of fertile soils, such as low-phosphorus and high-phosphorus fertilizers, were selected to conduct indoor culture experiments. The results showed that for the low-phosphorus soil test, the effective dosage form and formula for improving soil available P content were as follows: Formulation 4> Formulation 3> Formulation 1> Formulation 2 During soil culture (30 d, 60 d, 90 d, 120 d). Compared with the control, the average content of available phosphorus in soil increased by 11.22 mg / kg, 9.43 mg / kg, 7.34 mg / kg, 4.36 mg / kg and 3.38 mg / kg respectively. For the high-phosphorus soil test, the effect of improving the content of available P in the high-phosphorus soil was better. Formulation 3> Formulation 1> Formulation 2> Formulation 4, during the soil culture (30 days, 60 days, 90 days, 120 days ). Compared with the control, the average content of available P in soils increased by 10.37 mg / kg, 7.83 mg / kg, 3.99 mg / kg and 3.08 mg / kg respectively. The effect of phosphorus in liquid formulations was not obvious. It shows that there are some differences between the two kinds of soil with different fertility. Moreover, the phosphorus nutrition status of the soil itself has some influence on the phosphate solubilizing effect of the bactericide. The higher the background value of the soil available phosphorus is, the lower the effect of the phosphate solubilizing effect of the bactericide is.