微晶化磷矿粉对杨树生长及土壤不同形态磷含量影响

Effect of Ultra-fine Rock Phosphate Powder on the Poplar Growth and Different Forms of Soil Phosphorous Content

为了研究磷矿粉经微晶化活化后的应用效果,探讨解磷细菌对微晶化磷矿粉的实际应用效应提升能力,以过磷酸钙作为对比肥料,利用盆栽试验研究了普通磷矿粉原料、微晶化磷矿粉及解磷细菌对杨树生长、磷吸收和土壤磷有效性的影响。结果表明,与普通磷矿粉相比,微晶化磷矿粉显著促进了杨树的苗高、地径和生物量积累,杨树地上部磷的含量和总吸收量分别增加8.96%和22.85%。与过磷酸钙处理相比,微晶化磷矿粉的处理杨树的生长及生物量无显著性差异,但杨树地上部磷的含量和总吸收量分别减少10.05%和11.97%。微晶化磷矿粉中加入解磷细菌,土壤中的细菌、放线菌和微生物总量分别增加41.89%、28.57%和41.53%,真菌数量减少31.19%,但对杨树生长、磷素吸收和土壤磷素的有效性影响较小。微晶化磷矿粉处理与普通磷矿粉处理相比,土壤中酸溶性磷和有效磷含量分别增加53.27%和45.35%。与过磷酸钙处理相比,酸溶性磷和有效磷含量分别增加15.68%和13.60%。磷矿粉原料处理的土壤全磷含量最高,各处理水溶性磷含量差异不显著。以上研究表明,磷矿粉经微晶化作用后显著提高了杨树的生长,促进了磷素的吸收利用,有利于土壤长期保持供磷能力,但解磷细菌的加入对杨树生长和土壤供磷能力影响较小。

In order to investigate the effect of ultra-fine on phosphate powder application, as well as the phosphate solubilizing bacteria on ultra-fine phosphate powder, a pot experiment was conducted to investigate the poplar growth, phosphorous uptake and soil phosphorous content as affected by ultra-fine rock phosphate diameter and biomass significantly, and phosphorous content and phosphorous uptake was increased by 8.96% and 22.85%, respectively. There was no significant difference of poplar growth and biomass between calcium superphosphate and ultra-fine rock phosphate powder. However, compared with calcium superphosphate, ultra-fine rock phosphate powder decreased poplar phosphorous content and phosphorous uptake by 10.05% and 11.97%, respectively. Ultra-fine rock phosphate powder co-applied with dissolved phosphate microbe increased bacteria, actinomycetes amount and the total microorganism amount by 41.89%, 28.57% and 41.53%. However fungus amount was significantly decreased by 31.19%. Ultra-fine rock phosphate powder co-applied with dissolved phosphate microbe had little effect on poplar growth, phosphorous uptake and phosphorous content in soil. Compared with phosphate power, ultra-fine rock phosphate powder increased acid-soluble phosphorous and available phosphorous by 53.27% and 45.35%. Acid-soluble phosphorous and available phosphorous was increased by 15.68% and 13.60% in ultra-fine rock phosphate powder than that in calcium superphosphate. Total phosphorous was the highest in phosphate power, but no significant different was found of water-soluble phosphorous in all treatments. In short, ultra-fine rock phosphate powder improved the poplar growth, increased phosphorous uptake and utilization, which could benefit the long-term supply of phosphorous in soil. However, ultra-fine rock phosphate powder co-applied with dissolved phosphate microbe had no effect on phosphorous supply ability in soil.