4Lobell D B, Cassman K G, Field C B. 2009, Crop yield gaps: their importance, magnitudes, and causes[J]. Annual Re- view of Environment and Resources, 34: 179-204.
5Peng S B, Khush G S, Virk P, Virka P, Tang Q Y, Zou Y B. 2008, Progress in ideotype breeding to increase rice yield potential[J]. Field Crops Research, 108(1 ) :32-38.
6Yang W H, Peng S B, Laza R C, Visperas R M, Dionisio- Sese M L. 2008, Yield gap analysis between dry and wet season rice crop grown under high-yielding management conditions[J ]. Agronomy Journal, 100(5) : 1390-1395.
