4[4]Barnett K H, Pearce R B. Source-sink ratio alteration and its effect on physiological parameters in maize. Crop Science, 1983,23:294-299.
5[5]Daynard T B, Tanner J W, Hume D J. Contribution of stalk soluble carbohydrates to grain yield in corn (Zea mays L. ).Crop Science, 1969, 9:831-834.
6[6]Evans L T. The physiological basis of crop yield. In:Evans L T (ed). Crop Physiology. Cambridge: Cambridge University Press, 1975.
7[7]Tollenaar M, Aguilera A. Radiation use efficiency of an old and a new maize hybrid. Agronomy Journal, 1992,84:536-541.
8[11]Uhart S A, Andrage F H. Nitrogen deficiency in maize:Ⅰ.Effects on crop growth, development, dry matter partitioning, and kernel set. Crop Science, 1995, 35:1376-1383.
9[12]Uhart S A, Andrade F H. Nitrogen deficiency in maize:Ⅱ.Carbon-nitrogen interaction effects on kernels number and grain yield. Crop Science, 1995, 35:1 384-1 389.
