Effects of nitrogen and potassium nutrition on the occurence of Blumeria graminis(DC).Speer of wheat in wheat and faba bean intercropping

Pot experiment of wheat and fababean in intercropping was conducted in Yunnan agricultural university to study the effect of different level of N and K nutrition levels on the N and K uptake and the incidence of Blumeria graminis(DC).Speer in intercropping pattern.The results showed that the grain yield of wheat increased by 74.7%133.9% due to the intercropping,The amount of N uptake by wheat increased by 32%69% and the K uptake increased by 32%69% at low nitrogen supply level in intercropping.The amount of K uptake increased by 25.5%57.3% after supply potassium fertilizer.The intercropping advantages became smaller at high nitrogen supply level.The occurrence of Blumeria graminis(DC).Speer of wheat decreased by 42.1%83.1% in wheat and faba bean intercropping,and the occurrence of Blumeria graminis(DC) correlated with N concentration of wheat's stem and leaf with the coefficient being 0.623*0.702**.