Effects of Fertilizer Application on the Yield of Juglans regia L.

In order to obtain the suitable fertilization formula of Juglans regia L.,the experiment of fertilizer of nitrogen,phosphorus and potassium was conducted by orthogonal design on the gravel yellow earth soil in Chaotian District of Guangyuan City.The results showed that the effect of three kind of fertilizers on the yield of J.regia was descendingly phosphorus > potassium > nitrogen,and different disposals of fertilizer of nitrogen,phosphorus and potassium had obvious effects on the yield of J.regia.It was recommended that annual fertilization rate was 1 200 g urea,1 500 g calcium superphosphate and 940 g potassium sulphate for each tree on the gravel yellow earth soil.