基于生物量的冬小麦穗部主要形态参数模型

冬小麦穗部形态结构模型是功能–结构小麦模型的重要研究内容。以济麦22、泰农18和鲁原502为材料,于2013—2014和2014—2015年度开展了品种和施氮试验。结合2013—2014年数据,分析穗部主要形态参数与器官生物量的定量关系及形态参数间的内在联系,构建了冬小麦穗部主要形态结构模型。经2014—2015年小麦生长数据检验,除穗长模型精度略低外,穗宽、穗厚、颖壳长、颖壳宽、颖壳厚、籽粒长、籽粒宽和籽粒厚模型精度均较高,所建模型可较好模拟不同品种与施氮水平冬小麦穗部主要形态结构。

Biomass-Based Main Spike MorphologicalParameter Model for Winter Wheat

Spike morphological structure modelis an important basis for the function and structure model in winterwheat. We carried out a field experimentin the 2013–2014 and 2014–2015 growing reasonsusing winter wheat varieties Jimai 22, Tainong 18, and Luyuan 502under different nitrogen application levels. The morphological-structure models of wheat spikewere built through dissecting the quantitativerelationship between spike morphological-structure parameters and organ biomass, as well as the internal connections of morphological-structure parameters. These models were then validated with anindependent dataset collected in the 2014–2015 growing season.Except forspike length,all the models of spike width, spike thickness, glume length, glume width, glume thickness, grain length, grain width, and grain thicknesshad higher accuracy. These models can be used to simulate spike structure in diverse varieties under different nitrogenapplication levels.