关键词: 密度, 密度, 透光特性, 光合生理性能, 冬小麦

Abstract: Philippine is one of the chief rice import country in the world, the goal of rice self-sufficiency is a dominant policy. It made much account of rice quality research, and has explored a lot of rice grading index and methods. Philippine’s rice grading system has consulted the rice grading model commended by FAO, one of its notable characters is to carry out visual identifiable normal packaging. It is deserved to reference for us that Philippine has paid much attention to enhance producers, processors, traders and consumers’ sensible cognition and boost their consciousness to execute standards.