摘要
【目的】研究丹参根生长发育与温度、光辐射和土壤湿度的关系,建立丹参根生长发育预测模型。【方法】以紫花丹参为试材,通过小区试验测定其主根长、主根最大直径(主根粗)、根鲜质量、根干质量、根粗>3mm分根数及根含水量;测定丹参生长环境的温度、光辐射和土壤湿度,求出环境影响因子积,分别绘制丹参主根长、主根粗、根鲜质量、根干质量、分根数及根含水量与环境影响因子积的关系曲线,模拟其方程,建立丹参主根长、主根粗、根鲜质量、根干质量、根粗>3mm分根数及根含水量的预测模型,采用回归估计标准误差(RMSE)对所建模型的预测效果进行检验。【结果】丹参主根长、主根粗、根鲜质量、根干质量、根粗>3mm分根数及根含水量与环境影响因子积分别呈对数函数、二次多项式函数、二次多项式函数、二次多项式函数、幂函数及对数函数关系,其预测值与实测值之间的RMSE分别为0.778 2cm,0.510 9mm,3.925 4g,2.588 6g,0.685 0和1.097 0%。【结论】成功建立了基于温光和土壤湿度的丹参根生长发育预测模型,该模型的RMSE较小,预测效果较好,可以较为准确地预测丹参根的生长发育进程。
【Objective】 This article studied the relationship of root growth and development and temperature,solar radiation and soil humidity in Salvia miltiorrhiza,and built models of root growth and development.【Method】 With Salvia miltiorrhiza Bunge as testing material,main root length,main root thick,root weight,root dry weight,root tips and root water content were measured through block trials.Product’s environmental factors were calculated by accumulated effective temperature,total photosynthetically active radiation and accumulated soil humidity in the area of Salvia miltiorrhiza growing.Relation curves between main root length,main root thick,root weight,root dry weight,root tips,root water content and product environmental effect factors were protracted,respectively.Then,we simulated the equations and built the predictive models.At the same time,the models were validated through the method of Root mean square error.【Result】 The relationship between main root length,main root thick,root weight,root dry weight,root tips,root water content and product environmental effect factors is logarithmic function,quadratic polynomial function,quadratic polynomial function,quadratic polynomial function,exponential function and logarithmic function,respectively.RMSE between the predicted and measured values of main root thick,main root length,root weight,root dry weight,root tips,root water content were：0.778 2 cm,0.510 9 mm,3.925 4 g,2.588 6 g,0.685 0 and 1.097 0%,respectively.【Conclusion】 Root growth and development models were built successfully and its RMSE is small.The models developed in this study obtain good predictive effect and could predict the real root development process of Salvia miltiorrhiza Bunge precisely.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2012年第4期191-196,共6页
Journal of Northwest A&F University(Natural Science Edition)
基金
国家"十一五"科技支撑计划项目(2007BAD79B01
2007BAD79B06)
关键词
丹参
根生长发育
温度
光辐射
土壤湿度
预测模型
Salvia miltiorrhiza Bunge； root growing development； temperature； radiation； soil humidity； prediction model；
