4Westgate M E,Forcella F,Reicosky D C,et al.Rapid canopy closure for maize production in the northern US corn belt:radiation-use efficiency and grain yield[J].Field Crop Research,1997,49(2-3):249-258.
6Tollenaar M.Physiological basis of genetic improvement of maize hybrids in ontario from 1959 to 1988[J].Crop Science,1991,31(1):119-124.
7Tollennar M,Wu J.Yield improvement in temperate maize is contribute to greater stress[J].Crop Science,1999,39(6):1597-1604.
8Thomas H,Smart C M.Crops that stay green[J].Annals of Applied Biolology,1993,123 (1):193-219.
9Rajcan I,Tollenaar M.Source:sink ratio of leaf senescence in maize:I.Dry matter accumulation and partitioning during grain filling[J].Field Crops,1999,60(3):245-253.
10Valentinuz O R,Tollennar M.Vertical profile of leaf senescence during the grain-filling period in older and newer maize hybrids[J].Crop Science,2004,44(3):827-834.
