通过田间试验,研究施用不同形态磷肥对玉米干物质累积、产量、磷素吸收累积动态及磷肥利用效率的影响,探讨低磷红壤玉米对施用不同形态磷肥的响应。结果表明：在等养分施用量的条件下,与过磷酸钙(SSP)和钙镁磷肥(CMP)处理相比,施用磷酸二铵(DAP)和磷酸一铵(MAP)处理在玉米大喇叭口期、抽穗期、成熟期的地上部干物质累积量、磷素累积量及经济学产量和玉米磷肥利用效率均较高。至成熟期,施用DAP较SSP和CMP处理玉米地上部干物质累积成熟期提高了46.73%和72.85%、磷素累积增加了68.75%和100.47%,其籽粒磷素累积量增加了88.72%和101.38%。与SSP和CMP相比,施用DAP玉米籽粒产量依次提高了47.08%和73.82%。玉米磷肥偏生产力(PFPP)分别增加68.81%和78.16%,玉米磷肥农学效率(AEP)分别增加103.12%和120.51%。因此,有效磷含量较低的红壤上,玉米的磷肥形态响应为施用磷酸二铵(DAP)和磷酸一铵(MAP)处理优于过磷酸钙(SSP)和钙镁磷肥(CMP)处理。
英文摘要:
Field experiments were conducted to study the effects of different forms of phosphorus fertilizer on dry matter accumulation, yield, phosphorus uptake and accumulation dynamics and phosphorus utilization efficiency of maize. The response of maize with low phosphorus and red soil to diverse forms of phosphate fertilizer was discussed. The results show that: under the condition of equal nutrient application, Compared with superphosphate (SSP) and calcium magnesium phosphate (CMP) treatment, the application of Diammonium Phosphate (DAP) and monoammonium phosphate (MAP) on the dry matter accumulation, the accumulation of phosphorus and yield and utilization efficiency phosphate fertilizer were higher in the trumpeting, heading and the ripening of the maize. Compared with SSP and CMP treatments, the dry matter accumulation and maturity of DAP increased by 46.73% and 72.85% respectively, and phosphorus accumulation increased by 68.75% and 100.47% at maturity stage. The accumulation of phosphorus in grains increased by 88.72% and 101.38% respectively. Compared with SSP and CMP, grain yield of DAP maize increased by 47.08% and 73.82% respectively. Partial productivity of maize phosphate fertilizer (PFPP) increased by 68.81% and 78.16%, and the agronomic efficiency (AEP) of maize phosphate fertilizer increased by 103.12% and 120.51%, respectively. Therefore, on the red soil with low phosphorus content, the response of maize phosphate fertilizer to the application of diammonium Phosphate (DAP) and monoammonium phosphate (MAP) treatment was better than that of superphosphate (SSP) and calcium magnesium phosphate (CMP) treatment.
查看全文
;
