关键词: 丰甜1号, 籽粒, 灌浆性状, Richards方程

Abstract: [Objective] In order to determine the grain filling character of different part of common buckwheat to provide a theoretical basis for high yield cultivation of common buckwheat. [Method] Fengtian 1 was used to investigate the grain-filling traits of different part by using Richards's equation in common buckwheat. [Result] The pattern of grain filling duration followed an "S" curve, which showed as slow-fast-slow. The initial growth power, the time with maximum grain-filling rates and the maximum grain-filling rates in grains of top branch of Fengtian 1 were the largest, while were the minimum of bottom branch. The contribution of different grain filling period to grain weight was followed by the order of middle stage > later stage > earlier stage. [Conclusion] Different parts of common buckwheat had the different grain filling rate, which lead to the different 100 grain weight and formed the strong and weak potential grain.

Key words: Fengtian 1, grain, grain filling character, Richards's equation