施磷对杂交棉氮磷钾养分积累动态变化的影响

【目的】探讨施磷对杂交棉氮磷钾养分积累的影响。【方法】研究施磷量0、75、150和225 kg/hm2对膜下滴灌杂交棉植株氮磷钾养分积累动态变化特征。【结果】施磷可促进杂交棉植株对氮磷钾素的积累,同一生育时期,氮磷钾累积量均随施磷量增加而提高,氮磷钾素累积总体呈P2P3P1P0趋势,杂交棉植株磷素累积随生育期延长而降低,磷素累积总体呈增长趋势,施磷对杂交棉磷素累积差异显著。【结论】在试验条件下,杂交棉的施磷量在150 kg/hm2时最有利于氮、磷、钾素的积累。

Effect of Rhosphorus Application on Accumulating Dynamic Change of Nitrogen,Phosphorus and Potassium Nutrient of the Hybrid Cotton

【Objective】This research was designed to discuss the effect of phosphorus application on accumulation dynamic change of nitrogen,phosphorus and potassium nutrient of the hybrid cotton.【Method】A field experiment was carried out to study the effects of phosphorus application(0,75,150,225 kg/hm2) on the dynamic changing characters of nitrogen,phosphorus,potassium nutrient accumulation in hybrid cotton with drip irrigation under mulching film.【Result】The results showed that phosphorus application could promote the accumulation of nitrogen,phosphorus and potassium of the hybrid cotton plant.Nitrogen,phosphorus and potassium nutrient accumulation were increased with phosphorus application rates increasing in the same growth stage,the tendency of accumulating amount of nitrogen,phosphorus and potassium was P2>P3>P1>P0,phosphorus content in plant was decreased with prolonging the growth stages of the hybrid cotton.but phosphorus accumulation in the tissue showed an upward,phosphorus application rates influenced phosphorus uptake of the hybrid cotton plant significantly.【Conclusion】We suggested that under our experiment condition,the amount of the exerted phosphorus of the hybrid Cotton should be controlled about 150 kg/hm2.