5Cassman K G,Peng S,Olk D C,et al.Opportunities for in- creased nitrogen-use efficiency from improved resource management in irrigated rice systems[J].Field crops re- search,1998,56(1):7-39.
6Fageria N K,Baligar V C.Methodology for evaluation of lowland rice genotypes for nitrogen use efficiency[J].Jour- nal of Plant nutrition,2003,26(6):1315-1333.
7Novoa R,Loomis R S.Nitrogen and plant production[J].Plant and soil,1981,58(1-3):177-204.
8Dacey JWH.Knudsen-transitional flow and gas pressur- ization in leaves of Nelumbo[J].Plant Physiology,1987,85(1)199-203.
9Vogel S.Contributions to the functional anatomy and biolo- gy of Nelumbo nucifera(Nelumbo naceae)I.Pathways of air circulation[J].Plant Systematics and Evolution,2004,249(1-2):9-25.
10Hu M,Skibsted L H.Antioxidative capacity of rhizome ex- tract and rhizome knot extract of edible lotus(Nelumbo nu- jficera)[J].Food Chemistry,2002,76(3):327-333.