摘要
在试验的基础上,分析了冬小麦株高及叶面积指数的变化动态,并分别以播后天数和积温为自变量,建立多项式和扩充的Logistic模型对二者的变化动态进行模拟。结果表明,基于播后天数的多项式,能较好的反应LAI的变化动态,但对于株高后期的不变情况描述不够理想;基于积温的扩充Logistic模型能得到更高的精度,该模型为通过天气预报中的温度预报值,对株高和LAI的变化进行预测奠定了基础。
Dynamic changes of plant height and LAI of winter wheat were analyzed in this article.The polynomial model and improved Logistic model were built based on days after sowing and accumulated temperature respectively.The results show that dynamic changes of LAI could be expressed well by polynomial model,but non-ideal expression effect to the change of late plant height change.Higher simulation precision could be obtained by improved Logistic model based on accumulated temperature,the model can predict the plant height and LAI through the temperature in weather forecast of daily life.
出处
《灌溉排水学报》
CSCD
北大核心
2010年第4期97-100,共4页
Journal of Irrigation and Drainage
基金
农业部作物需水与调控重点开放实验室基金(CWRR200908)
重大水专项资助项目(008ZX07209)
华北水利水电学院高层次人才科研启动项目(200918)
