7Monteiro A,Lopes C M. Influence of cover crop on water use and performance of vineyard in Mediterranean Portugal[J].Agriculture Ecosystems and Environment,2007.336-342.
8Amy P K,Alison M B. vineyard δ 15N,nitrogen and water status in perennial clover and bunch grass cover crop systems of California' s central valley[J].Agriculture Ecosystems and Environment,2005.262-272.