不同土壤有效磷水平条件下施磷对设施辣椒产量和磷肥利用率的影响

适宜的根层磷养分供应是菜田磷肥推荐用量的基础。通过在开展多点磷肥施用试验,分析不同施肥措施对辣椒产量和磷肥农学利用率的影响。结果表明,除试验点2、试验点4和试验点8外处理间辣椒产量存在显著差异外,其他各试验点处理间辣椒产量差异不显著。与T1辣椒产量相比,T2、T3和T4辣椒产量都有所提高,但各处理间辣椒产量差异都不显著。各试验点各处理磷肥利用率由大到小依次为:处理2处理3处理4。因此,在土壤有效磷中等偏高磷水平条件下,设施辣椒菜田在施用有机肥的基础上不需要追施磷肥。

Effects of phosphate fertilizer supply on protected pepper yield and phosphorus agronomic efficiency in different soil available phosphorus levels

Appropriate root layer phosphorus nutrient supply is the base of vegetable plantation precommended dose. The effects of different phosphate fertilizer measures on the yield of pepper and phosphorus agronomic efficiency(PAE) are analyzed in a multipoint phosphate fertilization experiment. The results show except the site 2, site 4 and site 8 which there are significant difference between the different treatments in the pepper yield, other sites treatments with yield difference is not significant. Compared with the treatment 1, the yield in treatment 2, treatment 3 and treatment 4 are increased, but there is no significant difference between different treatments. The PAE from high to low in different treatments in each soil available phosphorus group are respectively: treatment 2 > treatment 3 > treatment 4. Therefore, it is not necessary for pepper to apply top-dressed phosphate fertilizer under the condition of medium or high soil available phosphorus levels.