冬大麦花后穗部氮素积累的特征分析及动态模拟  

Simulation on The Nitrogen Assimilation during Grain Filling for Winter Barley

作　　者：徐寿军[1] 顾小莉[2] 卜义霞[2] 张宝生[2] 许如根[2] 庄恒扬[2] 

机构地区：[1]内蒙古民族大学学报编辑部,内蒙古通辽028042 [2]扬州大学江苏省作物遗传生理重点试验室,江苏扬州225009

出　　处：《生物数学学报》2007年第4期740-744,共5页Journal of Biomathematics

基　　金：国家"863"计划项目(2001AA245041;2003(138))

摘　　要：以扬饲麦3、扬饲麦1和扬农啤2号等3个大麦品种为供试材料,构建了冬大麦花后穗部氮素积累的动态模型,即Richards方程W=A/(1+be^(-kt))~m.定量分析表明,方程的积累速率参数k和形状参数m相对稳定,分别取值0.240481和0.364499.终极积累量A与大麦花前穗部氮含量N呈幂函数关系.A=0.0034e^(127.79N);初值参数b与大麦花前穗部氮含量N呈指数函数关系.b=le-24N^(-14.978).运用苏啤3号的实测结果对模型进行了检验.结果表明,大麦花后穗部氮积累的模拟值和实测值的绝时误差都在7mg/株以内,误差最小为0.066 mg/株,最大的为6.321mg/株;平均差平方和的根值(Root mean square error,RMSE)在5mg/株之内,最大为4.768mg/株,最小为2.058mg/株.模拟值与实测值间显示出较好的一致性.3 winter barley cultivars, named Yangsimai 3,Yangsimai 1 and Yangnongpi 2,were used to construct the model of nitrogen assimilation during grain filling. The accumulative rate parameter（K） and form parameter（m） of the Richards equation were invariable, and they are 0.240481 and 0.364499. The relationship between maximum N accumulation amount（A） and N contents of previous flowering in the spikes of barley（N） could be described as A=0.0034e^127.79N . The relationship between beginning parameter（b） and N contents of previous flowering in the spikes of barley（N） could be described as b =le-24N^-14.978 .The Supi 3 was used to test the model.The results showed that the absolute prediction error for nitrogen assimilation during grain filling ranged among 0-7 mg/plant. The smallest absolute prediction error was 0.066 mg/plant and the biggest absolute prediction error was 6.321 mg/plant. The root mean square error （RMSE） was generally less than 5 mg/plant, which ranged among 2.058～4.768 mg/plant. The model reflected an identical level between simulated and observed values.

关 键 词：大麦 氮素积累 模拟 

分 类 号：Q141[生物学—生态学] S512.3[生物学—普通生物学]