磷矿粉与硫磺配施对油菜产量及养分吸收的影响

Nutrient absorption and yield of rape under coupled application of phosphate rock and sulfur

摘要: 红壤稻田施用磷矿粉和硫磺对油菜产量和养分吸收的影响结果表明：单施突尼斯Gafsa磷矿粉、中国昆阳磷矿粉和普钙处理油菜分别比对照增产22.2～23.2倍、13.7～13.9倍和21.2 倍，硫磺与磷矿粉混施进一步提高了磷矿粉的增产作用；昆阳磷矿粉、Gafsa磷矿粉和普钙各处理P总吸收量分别比对照提高6.7倍、15.8倍和13.8倍，硫磺与昆阳磷矿粉和Gafsa磷矿粉配施分别使油菜P总吸收量提高69.2%和11.4%；单施磷矿粉处理或磷矿粉与硫磺混施处理增加了油菜收获时土壤有效硫含量，但未增加土壤速效磷含量。

Abstract: The results of two field experiments on paddy soil from quaternary red clay treated with phosphate rock(PR) and elemental sulfur(ES) indicate that Gafas phosphate rock (GPR),Kunyang phosphate rock(KPR) and single supper phosphate(SSP) applications respectively increase rape grain yield by 22.2～23.2,13.7～ 13.9 and 21.2 folds as comparison with CK.GPR and KPR mixed with ES enhance the increasing effects of PR on yield.KPR,GPR and SSP application respectively increases P absorption of rape by 6.7,15.8,and 13.8 folds,whereas GPR and KPR mixed with ES increases P absorption by 69.2% and 11.4%.Application of GPR,KPR and SSP or their combination with PR and ES increases available S content in plowed layers,but does not increase available P.