通过盆栽试验,研究了不同解磷微生物对岩溶区玉米生长及土壤磷素利用的影响。试验设置不施磷肥(P0)、常规施用磷肥(P1)、施1/2量磷肥(P1/2)3种磷肥水平下,分别接种斯式泛菌(CA)、不动杆菌(SL),共8个处理,其中P1处理磷肥(P2O5)施用量为40...通过盆栽试验,研究了不同解磷微生物对岩溶区玉米生长及土壤磷素利用的影响。试验设置不施磷肥(P0)、常规施用磷肥(P1)、施1/2量磷肥(P1/2)3种磷肥水平下,分别接种斯式泛菌(CA)、不动杆菌(SL),共8个处理,其中P1处理磷肥(P2O5)施用量为40 mg/kg土,CA和SL菌剂用量均为100 m L/盆。结果表明,同等磷肥水平下,接种CA、SL均能提高玉米植株各部分的鲜物质质量和全磷含量,并使玉米在各生长阶段其根际土壤的速效磷含量维持在较高水平,同等条件下,SL处理比CA处理效果更好。表明在岩溶土壤中,CA、SL均具有解磷功能。展开更多
The experiment was conducted with 180 one-day-old AA broilers that were randomly divided into one control group and one trial group to study the effects of AsN1980 phytase on broilers growth performance and P utilizat...The experiment was conducted with 180 one-day-old AA broilers that were randomly divided into one control group and one trial group to study the effects of AsN1980 phytase on broilers growth performance and P utilization in low available phosphorus diets. Results showed that phytase supplement decreased F/W by 12.4%-13.4%and increased phosphorus availability by 7.63%-8.27%, both of which were significantly superior to the control group (P< 0.05).展开更多
Although to date some technologies producing bio-based phosphorus(P) fertilizers have been proposed and implemented, the efficient use of the recovered products is still limited due to legislative constraints and lack...Although to date some technologies producing bio-based phosphorus(P) fertilizers have been proposed and implemented, the efficient use of the recovered products is still limited due to legislative constraints and lack of insights in the P release with time and in the corresponding mechanisms. The aim of this work was to evaluate the fertilizer performance in terms of P release and use efficiency of recovered struvite, FePO_4-sludge, digestate, and animal manure as compared to fossil reserve-based mineral triple superphosphate(TSP). First, product physicochemical characteristics and P fractions in the context of European fertilizer legislation were assessed. Next, a controlled greenhouse experiment was set up to evaluate plant reactions as well as changes of P availability in a sandy soil with high P status and a Rheinsand soil with low P status. Soil P fractions were determined in the extracts with water, ammonium lactate and CaCl_2, and in soil solution sampled with Rhizon soil moisture samplers. Based on all results, it is worth conducting long-term field trials to evaluate the P release effect of struvite and digestate as compared to animal manure and TSP on different soil types with varying P status. These products showed promise as sustainable substitutes for conventional P fertilizers and could contribute to a more efficient use of P in agriculture. A refined classification of P application standards/recommendations in terms of soil P status, soil texture, and fertilizer characteristics, next to the crop P demand, is recommended. Moreover, the additional use of Rhizon samplers for determination of direct available P, including dissolved organic P, is proposed for better understanding and categorization of different P fertilizers in environmental and fertilizer legislations.展开更多
文摘通过盆栽试验,研究了不同解磷微生物对岩溶区玉米生长及土壤磷素利用的影响。试验设置不施磷肥(P0)、常规施用磷肥(P1)、施1/2量磷肥(P1/2)3种磷肥水平下,分别接种斯式泛菌(CA)、不动杆菌(SL),共8个处理,其中P1处理磷肥(P2O5)施用量为40 mg/kg土,CA和SL菌剂用量均为100 m L/盆。结果表明,同等磷肥水平下,接种CA、SL均能提高玉米植株各部分的鲜物质质量和全磷含量,并使玉米在各生长阶段其根际土壤的速效磷含量维持在较高水平,同等条件下,SL处理比CA处理效果更好。表明在岩溶土壤中,CA、SL均具有解磷功能。
文摘The experiment was conducted with 180 one-day-old AA broilers that were randomly divided into one control group and one trial group to study the effects of AsN1980 phytase on broilers growth performance and P utilization in low available phosphorus diets. Results showed that phytase supplement decreased F/W by 12.4%-13.4%and increased phosphorus availability by 7.63%-8.27%, both of which were significantly superior to the control group (P< 0.05).
基金supported by the European Commission under the Interreg IVb NWE Project Arbor(No.Interreg IVB 223G)the Environmental&Energy Technology Innovation Platform(MIP),Belgium+2 种基金the Natural Science and Engineering Research Council of Canada(NSERC)the Fonds de Recherche de Québec sur la Nature et les Technologies(FRQNT),CanadaPrimodal Inc.,Hamilton,Canada
文摘Although to date some technologies producing bio-based phosphorus(P) fertilizers have been proposed and implemented, the efficient use of the recovered products is still limited due to legislative constraints and lack of insights in the P release with time and in the corresponding mechanisms. The aim of this work was to evaluate the fertilizer performance in terms of P release and use efficiency of recovered struvite, FePO_4-sludge, digestate, and animal manure as compared to fossil reserve-based mineral triple superphosphate(TSP). First, product physicochemical characteristics and P fractions in the context of European fertilizer legislation were assessed. Next, a controlled greenhouse experiment was set up to evaluate plant reactions as well as changes of P availability in a sandy soil with high P status and a Rheinsand soil with low P status. Soil P fractions were determined in the extracts with water, ammonium lactate and CaCl_2, and in soil solution sampled with Rhizon soil moisture samplers. Based on all results, it is worth conducting long-term field trials to evaluate the P release effect of struvite and digestate as compared to animal manure and TSP on different soil types with varying P status. These products showed promise as sustainable substitutes for conventional P fertilizers and could contribute to a more efficient use of P in agriculture. A refined classification of P application standards/recommendations in terms of soil P status, soil texture, and fertilizer characteristics, next to the crop P demand, is recommended. Moreover, the additional use of Rhizon samplers for determination of direct available P, including dissolved organic P, is proposed for better understanding and categorization of different P fertilizers in environmental and fertilizer legislations.
