【摘要】 在湖北省小麦主产县(市、区)进行不同磷肥用量的70组田间肥效试验,以阐明湖北省小麦施磷效益及磷肥利用率现状。结果表明,小麦施磷增产效果显著,与不施磷对照处理相比,施磷后小麦平均增产1 449 kg/hm2,增产率为27.0%;施磷平均经济效益增加1 798元/hm2,产投比5.8;磷肥偏生产力和农学效率分别为78.8kg/kg和16.1kg/kg。根据直线加平台模型,得出湖北省小麦磷肥最佳用量平均为75kg/hm2。更多还原

【Abstract】 Field experiments on wheat were conducted at 70 sites in Hubei province during 2006~2008 to study the phosphorus(P) effect and P use efficiency of wheat in main wheat-planting regions of Hubei province.The results indicated that applying P fertilizers could increase the yield and profit of wheat significantly.The average yield of P application treatment was 1 449 kg/hm2 higher than that of the control treatment(without P),and the increment rate was 27.0%.Compared with control treatment,profit of P application increased by 1 798 Yuan/hm2 and the value cost ratio(VCR) averaged 5.8.The partial factor productivity of applied P(PFPP) and agronomic P use efficiency(AEP) averaged 78.8 kg/kg P2O5 and 16.1 kg/kg P2O5,respectively.According to linear plus platform model,the average optimum P application rate was 75 kg P2O5/hm2 for wheat in Hubei Province.更多还原