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为了定量分析冬小麦越冬前叶片主要几何参数与器官生物量及比叶重的关系,以小麦品种济麦22、泰农18和鲁原502为材料,于2013-2014和2014-2015年冬小麦生长季内开展了品种和施氮试验,通过分析越冬前叶长和叶宽与器官生物量和比叶重之间的定量关系,以及叶弦角和叶切角与比叶重之间的关系,构建了冬小麦越冬前叶片几何参数模型。经独立试验资料检验,冬小麦越冬前叶片主要几何参数叶长、最大叶宽、叶切角和叶弦角实测值与模拟值的RMSE、平均绝对误差(da)、平均相对误差(dap)和R2分别为1.453cm(n=46)、1.136cm、11.997%和0.916;0.093cm(n=46)、0.073cm、13.396%和0.837;23.906°(n=46)、16.059°、52.153%和0.556;23.706°(n=46)、19.818°、53.966%和0.787,均达极显著水平(P<0.001),说明实测值与模拟值的吻合程度较好。所建模型可较好地模拟不同品种、不同施氮水平下冬小麦越冬前叶片主要几何参数。
In order to quantitatively analyze the relationship between the major geometric parameters of winter wheat and the biomass and specific leaf weight of winter wheat, wheat cultivars Jimai 22, Tianyong 18 and Luyuan 502 were used as materials in the winter wheat growing season between 2013-2014 and 2014-2015 The varieties and nitrogen application were tested in this paper. The quantitative relationship between leaf length and leaf width, organ weight and specific leaf weight, and the relationship between leaf row angle and leaf cut angle and specific leaf weight The Geometric Parameter Model of Winter Wheat Before Crawling. According to the independent test data, RMSE, average absolute error (da), average relative error (dap) and R2 of measured and simulated values of main geometric parameters such as leaf length, maximum leaf width, leaf cut angle and leaf chord angle of winter wheat before overwintering (N = 46), 1.136 cm, 11.997% and 0.916; 0.093 cm (n = 46), 0.073 cm, 13.396% and 0.837; 23.906 ° (n = 46), 16.059 °, 52.153% and 0.556, respectively; 23.706 ° (n = 46), 19.818 °, 53.966% and 0.787, respectively, reached the extremely significant level (P <0.001), indicating that the measured values are in good agreement with the simulated values. The model can well simulate the main geometric parameters of winter wheat before winter, under different nitrogen levels.