Deinert Lea, Ikoyi Israel, Egeter Bastian, Forrestal Patrick, Schmalenberger Achim
Department of Biological Sciences, School of Natural Sciences, University of Limerick, V94 T9PX Limerick, Ireland.
School of Biology and Environmental Sciences, University College Dublin, D04 V1W8 Dublin, Ireland.
Plants (Basel). 2023 Jul 25;12(15):2762. doi: 10.3390/plants12152762.
Various nutrient recycling technologies are currently under development in order to alleviate the dependency of non-renewable raw material for the production of mineral phosphorus fertilizers commonly used in agriculture. The resulting products, such as struvites and ashes, need to be assessed for their application as so-called recycling-derived fertilizers (RDFs) in the agricultural sector prior to commercialization. Here, we conducted a short-term (54 days) trial to investigate the impact of different phosphorus fertilizers on plant growth and the soil P cycling microbiota. was grown with application of superphosphate (SP) as inorganic fertilizer, two ashes (poultry litter ash (PLA) and sewage sludge ash (SSA)), and two struvites (municipal wastewater struvite (MWS) and commercial CrystalGreen (CGS)) applied at 20 and 60 kg P ha in four replicates. A P-free control (SP0) was also included in the trial. Struvite application increased plant dry weights, and available P acid phosphatase activity was significantly improved for struvites at the high P application rate. The ash RDFs showed a liming effect at 60 kg P ha, and PLA60 negatively affected acid phosphatase activity, while PLA20 had significantly lower copy numbers. P mobilization from phosphonates and phytates was not affected. TCP solubilization was negatively affected by mineral SP fertilizer application at both P concentrations. The bacterial (16S and ) communities were only marginally affected by the tested P fertilizers. Overall, struvites appeared to be a suitable substitute for superphosphate fertilization for Irish pastures.
目前正在开发各种养分循环利用技术，以减轻农业中常用的矿物磷肥生产对不可再生原材料的依赖。在商业化之前，需要对鸟粪石和灰烬等最终产品作为所谓的循环衍生肥料（RDF）在农业领域的应用进行评估。在此，我们进行了一项短期（54天）试验，以研究不同磷肥对植物生长和土壤磷循环微生物群的影响。试验中，在四个重复中以20和60 kg P ha的用量施用了过磷酸钙（SP）作为无机肥料、两种灰烬（家禽粪便灰（PLA）和污水污泥灰（SSA））以及两种鸟粪石（城市污水鸟粪石（MWS）和商业晶绿（CGS））来种植爱尔兰黑麦草。试验中还设置了无磷对照（SP0）。施用鸟粪石增加了植物干重，在高磷施用量下，鸟粪石显著提高了酸性磷酸酶活性。灰烬RDF在60 kg P ha时表现出中和土壤酸度的作用，PLA60对酸性磷酸酶活性有负面影响，而PLA20的16S rRNA基因拷贝数显著较低。来自膦酸盐和植酸盐的磷的活化不受影响。在两种磷浓度下，矿物SP肥料的施用对磷酸三钙的溶解有负面影响。测试的磷肥对细菌（16S和）群落的影响很小。总体而言，鸟粪石似乎是爱尔兰牧场过磷酸钙施肥的合适替代品。
