CAJ | 학술논문

通过Logistic方程以定植时间为自变量建立丹参（Salvia miltiorrhiza Bunge)主根粗、主根长和根鲜重的生长模型。分别用2011和2012年的数据进行拟合和检验，用1：1作图法（1：1plot)和均方根误差（RMSE)与实测值进行比较。通过对Logistic方程求一、二、三阶导数和拐点，研究了丹参根部生长速率与密度和氮肥的关系，探索丹参根部的生长规律。2011年拟合方程的决定系数均达到0.96以上，回归方程统计检验均达到极显著水平（P<0.01)；2012年拟合方程的决定系数均达到0.95以上。结果表明，用Lo-gistic曲线可较好地拟合丹参根部生长量与定植时间的关系；在生长中期和后期，低密度（株距25 cm×行距30 cm)处理的丹参根鲜重增长速率比其余密度处理的快；适量的氮肥（100 kg/hm2)使根鲜重的增长速率较快且持续的时间较长，速生期是丹参根部生长的关键时期。
통과Logistic방정이정식시간위자변량건립단삼（Salvia miltiorrhiza Bunge)주근조、주근장화근선중적생장모형。분별용2011화2012년적수거진행의합화검험，용1：1작도법（1：1plot)화균방근오차（RMSE)여실측치진행비교。통과대Logistic방정구일、이、삼계도수화괴점，연구료단삼근부생장속솔여밀도화담비적관계，탐색단삼근부적생장규률。2011년의합방정적결정계수균체도0.96이상，회귀방정통계검험균체도겁현저수평（P<0.01)；2012년의합방정적결정계수균체도0.95이상。결과표명，용Lo-gistic곡선가교호지의합단삼근부생장량여정식시간적관계；재생장중기화후기，저밀도（주거25 cm×행거30 cm)처리적단삼근선중증장속솔비기여밀도처리적쾌；괄량적담비（100 kg/hm2)사근선중적증장속솔교쾌차지속적시간교장，속생기시단삼근부생장적관건시기。
Using planting time as independent variable, the growth models of root diameter, root length and root fresh weight Salvia miltiorrhiza Bunge by Logistic equation were established. The data of 2011 and 2012 were used to fit and validate the models separately. 1:1 plot and root mean squared error (RMSE﹚ was used to compare simulated values with observed values. The first, second and third derivative and inflection points of logistic equation were used to analyse the relation of the growth rate of root fresh weight to the planting density and nitrogenous fertilizer and the growing trend of root traits of S. miltior-rhiza. The determined coefficient(R2﹚ of the data of 2011 were above 0.96 and reached significant levels(P<0.01﹚. The deter-mined coefficient(R2﹚ of simulated values and observed values of 2012 were above 0.95. Results showed that there were high consistence between the growth of root traits and Logistic curve fitting. The growth rate of root fresh weight of lower density treatment was faster than that of the higher density treatment in the middle and late growth. The moderate nitrogenous fertil-izer (100 kg/hm2﹚ made the growth rate faster and the growth time longer. Fast-growing period of root traits of S. miltiorrhiza was very important time.