Effects of Nitrogen Addition on Competitive Ability and Productive Performance of Legume-Grass Mixture

The influences of nitrogen(N) addition on the competitive ability and productive performance of legume-grass mixtures were analyzed in this paper.The results showed that the forage yield,CP yield and EE yield after adding N significantly increased.The productive performance of these patterns was significantly improved.The legume /grass yield,grass and legume relative density after adding N did not significantly changed,indicating that the ecological niche of legume and grass had differentiation.The competitive ability of legume decreased,whereas the competitive ability of grass increased.Therefore,the productive performance of legume-grass mixtures was improved,the competitive patterns of legume and grass was undermined after adding N.