关键词: 马铃薯块茎, 形态结构, 生物量, 生理发育时间, 模型

Abstract: Tuber morphological structure model is an important content for studying ‘function-structure potato’ model. Taking potato variety ‘Favorita’ as material, this paper carried out a field fertilizer test in potato growing seasons of 2016 and 2017. On the basis of tuber morphological-structure parameters and organ biomass data collected in the experiment of different nitrogen and potassium levels and different additional nitrogen levels, the morphological-structure models of potato tuber were built through dissecting the quantitative relationship parameters among tuber morphological-structure, organ biomass and physiological development time, and based on the internal connections of morphological-structure parameters. These models were then validated with an independent data set collected in the experiment of different based nitrogen levels. Except for index of tuber shape, tuber length, tuber width, tuber thickness, and specific tuber weight of potato had higher accuracy. These models could be used to simulate tuber structure under different fertilizer application levels.

Key words: potato tuber, morphological structure, biomass, physiological development time, model