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向日葵和马铃薯间作是我国北方农牧交错带的一种重要种植方式,准确模拟其间套作的发育时期对评价和优化间套作种植具有重要意义.以生理发育时间为基础建立了向日葵和马铃薯单作、间作的生育期模拟模型,并利用2010—2011年的大田试验数据对模型进行检验.结果表明:生育期模拟值与观测值的符合度较好,播种—出苗期、出苗—开花期、开花—成熟期和全生育期的均方差根(RMSE)分别为1.2、2.9、2.4和2.6d,误差<5%.模型既有较强的机理性,又有较好的适用性,为探索间套作条件下作物的生长发育规律提供了良好工具.
Sunflower and potato intercropping is an important planting pattern in the ecotone between agriculture and animal husbandry in north China, and accurately simulating the developmental period of intercropping is of great significance for the evaluation and optimization of intercropping.According to the physiological development time, sunflower and potato single And the intercropping period as the simulation model of the growth period, the model was tested by using the field test data from 2010 to 2011. The results showed that the coincidence of the simulation value and the observation value was good during the seeding-emergence, emergence-flowering, The mean square error of root mean square (RMSE) of flowering-maturity and whole growth period was 1.2, 2.9, 2.4 and 2.6 days, respectively, with an error of less than 5%. The model has both strong mechanism and good applicability. Between sets of conditions under the crop growth and development provides a good tool.