基于生物量的越冬期后小麦地上部几何参数模型研究

Aboveground Geometrical Parameter Models Based on Biomass of Winter Wheat after Overwintering

为了定量分析越冬期后小麦主茎叶片、叶鞘、茎秆和麦穗的形态参数与生物量间的关系,本研究以衡冠35、济麦22和衡4399为试材,在试验观测的基础上,分析了不同品种类型小麦叶片长度、最大叶宽、叶鞘长度、叶鞘展开宽度、茎秆长度和直径以及麦穗宽度、厚度和长度等形态参数与相应器官生物量的关系,构建了基于生物量的小麦叶片、叶鞘、茎秆和麦穗形态模型。验证结果显示,除衡4399麦穗长度的模拟值与实测值差异很大、相关性未达显著水平外,其余品种各形态参数的模拟值与实测值均显著相关(P<0.05),表明所构建的模型对冬小麦越冬期后植株形态参数具有较好的预测性。

This study was carried out to quantitatively analyze the relationship between the morphological parameters of winter wheat leaf,sheath,stem and ear and organ biomass after overwintering.Three wheat cultivars Hengguan 35,Jimai 22 and Heng 4399 were used as experiment materials.On the basis of filed experiments,the relationships between leaf length,maximum leaf width,leaf sheath length,leaf sheath width,stem length and diameter,ear width,ear thickness and ear length and corresponding organ biomass were studied,and the geometrical parameter models of wheat leaf,leaf sheath,stem and ear were established based on biomass.The verification results showed that the simulated values of all the morphologic parameters were significantly correlated with the measured values of the cultivars except Heng 4399.It indicated that the wheat plant morphological parameters after overwintering could be well simulated by these established geometrical parameter models.