Within the growing greenhouse cultivation that we are facing these years, the use of phosphorus (P) fertilizers will inevitably increase. In this study, we used five different sewage sludges (SSs) as a P fertilizer, and studied the effect of these SSs on P uptake by cucumber plant (Cucumis sativus var. Negin L.), and specified their effects on availability and speciation of P in the rhizosphere and non-rhizosphere soils. A sandy clay loam texture soil was used and treated with 100 mg P kg⁻¹ of five different SSs. Cucumber plants were grown under greenhouse conditions and after nearly 2 months, the plants were harvested. The plant’s parts, root, shoot, and fruit were separated. Rhizosphere and non-rhizosphere soils for each treatment were also separated. The addition of different SSs increased shoot dry weight and also increased P content in root and shoot compared to control soil. The results showed that rhizosphere soil had a lower content of P extracted by water or Olsen compared to the non-rhizosphere soil. The mean proportion of HPO₄⁻² in the SS-treated soils in the rhizosphere soil (74.3%) was significantly higher than non-rhizosphere soil (66.3%), while the proportion of H₂PO₄⁻ in non-rhizosphere soil (29.8%) was significantly higher than rhizosphere soil (21.2%). Generally, the HPO₄⁻² and H₂PO₄⁻ were the dominant species of P in all treatments. The water-extractable P was better correlated to P content in shoot compared to Olsen-extractable P. This research offers additional insights into the effects of SS on soil solution characteristics and the availability of P in rhizosphere and non-rhizosphere soils which will be useful in understanding P uptake from soils treated with SS.

在这些年来我们日益增长的温室栽培中，磷（P）肥料的使用将不可避免地增加。在这项研究中，我们使用了五种不同的污泥（SSS）作为磷肥，以及黄瓜属植物（研究了这些SS的上吸磷量的影响黄瓜变种。涅金L.），并指定其可用性和形态的影响根际土壤和非根际土壤中的磷。使用砂质壤土质地土壤，并用100 mg P kg ^-1处理五个不同的SS。黄瓜植物在温室条件下生长，近两个月后，收获了植物。将植物的各个部分，根，芽和果实分开。每种处理的根际土壤和非根际土壤也要分开。与对照土壤相比，添加不同的SS会增加枝干重量，并增加根和枝中的P含量。结果表明，与非根际土壤相比，根际土壤通过水或奥尔森提取的磷含量较低。HPO的平均比例₄ ^-2在根际土（74.3％）的SS-处理的土壤比非根际土（66.3％）显著较高，而H的比例₂ PO ₄ ^-在非根际土壤中（29.8％）明显高于根际土壤（21.2％）。通常，HPO ₄ ^-2和H ₂ PO ₄ ^-分别为P的所有治疗方法的优势种。与Olsen可萃取P相比，水可萃取P与苗中P含量的相关性更好。这项研究为SS对土壤溶液特性的影响以及根际和非根际土壤中P的有效性提供了更多见解。了解用SS处理过的土壤中的P吸收。