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苜蓿的株高和叶面积是反映其产量高低的特征量。为推进虚拟草业的牧草模型技术发展,文中在田间试验的基础上,分别以播后天数和有效积温为自变量,通过对苜蓿的株高和叶片的生长数据进行定量分析,采用logistic函数对二者的变化动态进行建模,并对模型的稳定性和适应性进行了全面的验证。结果表明:模型的模拟值与实测值误差小,能够较好的反映常规栽培条件下苜蓿株高和叶片的生长发育状况。
The plant height and leaf area of alfalfa are characteristic quantities reflecting the level of yield. In order to promote the forage grass model technology development in the virtual grass industry, based on the field experiments, the days after sowing and the effective accumulated temperature were used as independent variables. Through the quantitative analysis of alfalfa plant height and leaf growth data, logistic function The two models are dynamically modeled, and the stability and adaptability of the model are fully verified. The results showed that the error between simulated value and measured value of the model was small, which could well reflect the plant height and leaf growth and development of alfalfa under conventional cultivation conditions.