【摘要】 通过盆栽试验研究了在4种不同施磷水平下施用解磷菌剂对生菜(Lactucas sativa L. var. ramosa Hort.)促生效应及土壤磷素形态的影响。结果表明,在土壤缺磷情况下,施用解磷菌剂能提高生菜叶和根的鲜重和干重,提高叶片净光合速率和蒸腾速率,增加植株磷素吸收量,提高生菜的品质和产量,并能减少土壤中全磷含量的积累,促进土壤有效磷的释放和土壤库中有效磷的积累。在土壤磷素丰富的情况下,施用解磷菌剂对生菜的生长和土壤磷素营养促进作用较弱。土壤添加磷肥量为0.375 g/kg,解磷菌剂对生菜的促生效应和土壤磷素释放效果最佳。解磷菌剂的应用不仅能减少农田土壤磷素的流失,减轻农田土壤磷面源污染的风险,还能为蔬菜生产保质保量,达到收益最大化。更多还原

【Abstract】 A potting experiment was conducted to evaluate the effects of the phosphate-solubilizing bacteria on lettuce growth and soil phosphorus forms at different growth stages of lettuce(Lactuca sativa var. ramosa Hort.)under four application levels of calcium-superphosphate. The results showed,under the condition of soil phosphorus deficiency,that the application of the phosphate-solubilizing bacteria could improve the leaf fresh weight,root fresh weight,leaf dry weight and root dry weight of lettuce,increased the net photosynthetic rate and transpiration rate,enhanced the phosphorus absorption capacity in lettuce plants,improved the nutritional quality and yield of lettuce,reduced the accumulation of whole phosphorus content in soil,and promoted the release of effective phosphorus and the accumulation of effective phosphorus in soil reservoir. In the case of the soil phosphorus abundance,the application of the phosphate-solubilizing bacteria was weaker influence on the growth of lettuce and soil phosphorus. When the amount of phosphate fertilizer in the soil was 0.375 g/kg,the phosphate-solubilizing bacteria promoting growth effect of lettuce and the soil phosphorus to release were the best. The application of the phosphate-solubilizing bacteria not only decrease the loss of phosphorus in agricultural land,mitigate the risk of phosphorus non-point source pollution,but also guarante the quality and quantity for farmers to maximize vegetable yield.更多还原