Abstract: To tackle the problems such as lower soil organic matter concentration,soil N reserves,descending yield increasing potential and lower yield stability in Taihang Piedmont Plain,study the effect of NPK fertilizer combined organic manure on soil organic matter concentration and soil nutrient concentration such as nitrogen,phosphorous and potassium,indict the specified quantity. Field experiments are executed in Malan farm,Xinji,Hebei.There were 5 treatments are designed,①CK(no fertilization), ②NPK fertilizer,③Corn straw,④NPK fertilizer +corn straw,⑤NPK fertilizer + organic manure(mainly by horse manure). NPK fertilizer combined organic manure is better than NPK fertlizer combined corn straw with equal nutrient quantity. Compared the CK,Yield has an increase range between 75. 64%－79. 7%. Soil organic matter,total N,available N,total P,available P and available K has respectively increase in 14. 59%－19. 2%,5. 7%－14. 81%,10. 38%－24. 30%,8. 63%－10. 89%,93. 19%－107. 24% and 17. 69%－55. 18% in concentration. NPK fertilizer combined organic manure increase can increase soil organic matter and reserves of N and P,increase soil availble phosphorous and potassium,increase yield and enhance the yield increasing stability(YIS).

Key words: Fertilizer combined organic manure, Soil organic matter, Soil nutrient, Yield stability

CLC Number: 

• S15