Abstract: To investigate the reasonable amounts of NPK fertilization on peanut in the rotation of peanut and rye during one year,the effects of the different applying amounts of NPK fertilizers on the yield and quality of peanut,the SPAD value and the gas exchange parameters of the leaf of peanut in pod setting stage,and the soil nutrients in the harvest stage of peanut,and the grass yield and the nutrients accumulation above ground of rye were studied by the combining methods of the field investigation and the laboratory analysis.The results showed that the pod yield,the hundred pods weight and the hundred grains weight of peanut,and the grass yield and the protein yield of the following rye were all improved with the increase of NPK fertilizers amounts.However,the excessive fertilization of NPK would cause the increment of the pod yield of peanut being not significant.And the protein content,the fat content,the O/L value of the peanut grain increased significantly when the NPK fertilizers amounts were added to a certain level.And improving the NPK fertilizer levels not only could enhanced significantly the chlorophyll content,photosynthetic efficiency of peanut pod leaf,but also could significantly improve the Alkaline P,Alkaline K content in soil except for the SOM content,alkaline hydrolysis nitrogen content.The C,N,P and K nutrients of rye accumulated with the increase of the fertilization level,and the maximum amounts of the accumulated nutrient was C,and the mini was P.And the reasonable applying amounts of NPK were N 56.25 kg/ha,P₂O₅ 243.75 kg/ha,K₂O 187.50 kg/ha respectively.In conclusion,the rational application of NPK fertilizers can increase the yield,quality and photosynthetic efficiency and nutrients content in soil.

Key words: Peanut, Rye, NPK, Integrative planting, Yield, Quality, Nutrients accumulation

CLC Number: 

• S143