不同产量水平小麦最适总茎数动态模型研究

Dynamic Model of Optimum Total Shoot Number(TSN) of Wheat under Different Yielding Levels

为给小麦田间管理提供科学依据，以2000-2002年田间试验为基础，结合相关文献资料，借鉴R/WCSODS思路，建立了不同产量水平小麦最适总芭数动态模拟模型，利用济南与南京地区常年气象资料及相应品种参数等进行了检验。结果表明，在7500kg·ha^-1产量时济麦19号和麦20号在济南的最适总茎数动态模拟值与实测值的相关系数为0.9649～0.9690，差值标准误为154.2万～155.2万·ha^-1，平均绝对误差为14.25万～127.5万·ha^-1；在6000kg·ha^-1产量时麦5号在南京的最适总茎数动态模拟值与实测值相关系数为0.9987，差值标准误为81.56万·ha^-1，平均绝对误差为1.38万·ha^-1。模拟值与实测值的相关系数均达显著或极显著水平。

A simulation model of optimum total shoot number（TSN） dynamic for wheat under different yielding levels was developed on field experiment from 2000 to 2002 and data from references, employing idea of R/WCSODS （Rice / Wheat Cultivation-Simulation-Optimization Decision Making System）, and further calibrated by adopting climate data of the normal year in Jinan and Nanjing areas and the corresponding cultivar parameters. The results showed that the correlation coefficient, standard error of absolute deviation, and average absolute deviation between the simulated and the observed of the optimumTSN dynamic were 0. 9649～0. 9690, 154. 2×10^4～155.2 ×10^4 stems·ha^-1, and 154.2×10$4～155.2×10^4stems·ha^-1 for Jimai 19 and Jimai 20 at 7 500 kg·ha^-1 yield in Jinan area, respectively, 0. 9987,81.56（10^4·ha^-l）, and 1.38×10^4stems·ha^-1） for Yangmai 5 at 6 000 kg·ha^-1 yield in Nanjing area, respectively. The correlation coefficient were significant at 0.05 or 0.01 level. The paper took into account the factors of cultivar types, yielding levels, the optimum LAI and leaf area per shoot or ear, and so on, provided theoretical method for confirming the optimum TSN dynamic for wheat under different sites and yielding levels.