6Harvey P H. Hereditary variation in plant nutrition [J]. Genetics, 1939, 24: 437-461.
7Presterl T, Groh S, Landbeek M et al. Nitrogen uptake and utilization efficiency of European maize hybrids developed under conditions of low and high nitrogen input [J]. Plant Breed., 2002, 121: 480-486.
8Worku M, Banziger M, Erley G S et al. Nitrogen uptake and utilization in contrasting nitrogen efficient tropical maize hybrids [J]. Crop Sci., 2007, 47: 519-528.
9Crawford T W J, Rending V V, Broadbent F E. Sources, fluxes, and sinks of nitrogen during early reproductive growth of maize [ J ]. Plant Physiol., 1982, 70: 1654-1660.
10Osaki M, Morikawa K, Shimano T et al. Productivity of high-yielding crop II . Comparison of N, P, K, Ca and Mg accumulation and distribution among high-yielding crops [ J]. Soil Sci. Plant Nutr. , 1991, 37 : 445 -454.
