磷肥品种对豫北地区冬小麦产量和磷素利用率的影响

Effect of Phosphate Fertilizer Varieties on Winter Wheat Yield and Phosphorus Utilization Efficiency in Northern Henan Province

为明确适宜豫北地区冬小麦种植的高效磷肥品种,并为该区域冬小麦精准施肥和土壤生态管理提供科学依据。本研究采用田间定位试验,设置不施磷肥(CK)、重过磷酸钙(TSP)、磷酸一铵(MAP)、磷酸二铵(DAP)和聚磷酸铵(APP)5个处理,通过分析产量、磷素累积量、磷肥利用率、土壤有效磷含量和无机磷组分等指标,探讨不同磷肥品种的施用效果,同时,利用高通量测序技术研究携带gcd基因的细菌群落特征。结果表明,与CK相比,4种磷肥处理均显著提高了冬小麦产量、磷素累积量、磷肥利用率、土壤有效磷含量和Ca2-P含量,其中APP效果最佳。而且,籽粒产量分别与土壤有效磷含量及Ca2-P含量呈显著正相关。此外,不同品种磷肥的施用对携带gcd基因的细菌群落多样性无显著影响,但显著改变了其群落结构。从群落组成来看,假单胞菌属(Pseudomonas)是绝对优势菌属。综上,在豫北地区冬小麦生产中,APP综合表现最佳,具有较好的应用潜力,可作为优选磷肥品种。

[Objective] To identify highly efficient phosphate fertilizer varieties suitable for winter wheat cultivation in northern Henan Province and to provide a scientific basis for precise fertilization and soil ecological management in this region.[Methods] A field experiment was conducted with five treatments:no phosphate fertilizer(CK),triple superphosphate(TSP),monoammonium phosphate(MAP),diammonium phosphate(DAP),and ammonium polyphosphate(APP).Crop yield,phosphorus accumulation,phosphorus fertilizer utilization efficiency,soil available phosphorus content,and inorganic phosphorus fractions were examined to assess the effects of different phosphate fertilizer varieties.High-throughput sequencing technology was further employed to analyze the characteristics of gcd-harboring bacterial communities.[Results] Compared with CK,all four phosphate fertilizer treatments significantly increased winter wheat yield,phosphorus accumulation,phosphorus fertilizer utilization efficiency,soil available phosphorus content, and Ca2-P content,with the APP treatment showing the best performance.Grain yield was significantly and positively correlated with soil available phosphorus and Ca2-P contents.Although different phosphate fertilizers did not significantly alter the diversity of gcd-harboring bacterial communities,they substantially changed the community structure,with Pseudomonas identified as the dominant genus.[Conclusion] APP exhibited the best overall performance in winter wheat production in northern Henan Province and holds strong application potential,making it a recommended phosphate fertilizer variety for the region.