马铃薯块茎形态结构模型主要参数的确定与验证

马铃薯块茎形态结构模型是功能-结构马铃薯模型的重要研究内容。以‘费乌瑞它’马铃薯品种为材料,于2016和2017年度马铃薯生长季开展了施肥试验。基于不同氮钾施肥水平试验和不同施氮追肥水平试验马铃薯块茎主要形态参数和器官生物量等数据,通过分析块茎主要形态与器官生物量和生理发育时间的定量关系参数,基于块茎形态参数之间的内在联系,构建了马铃薯块茎形态结构参数模型。经基肥不同氮水平试验马铃薯块茎生长数据检验,除薯形指数模型精度略低外,块茎长、块茎宽、块茎厚和比块茎重模型精度均较高,所建模型可较好模拟不同施肥水平马铃薯块茎主要形态结构。

Determination and Validation of Main Parameters of Potato Tuber Morphological Structure Model

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.