基于辐热积的日光温室不同茬次袋培番茄干物质模型比较
Comparison of Dry Matter Partitioning Model of Tomato Cultivated with Growth-bag during Different Growing Seasons Based on Product of Thermal Effectiveness and Photosynthesis Active Radiation in Solar Greenhouse

为了探究东北地区日光温室基质袋培番茄干物质生产及分配与温室环境辐热积关系，在番茄全生育期建立并比较基于辐热积的冬春茬与秋冬茬番茄干物质生产模型。结果表明，利用累积辐热积与干物质总量得到的拟合模型模拟效果较好，其冬春茬和秋冬茬单株绝对误差分别为5.12 g和9.67 g，单株剩余标准误差分别为9.46 g和15.02 g，决定系数分别为0.98和0.96，说明冬春茬的模型模拟效果优于秋冬茬。通过累积辐热积与干物质总量模型及干物质分配关系，比较模拟累积辐热积对番茄根、茎、叶、果干物质分配影响的结果表明，2个茬次的番茄叶片和果实的分配指数变化趋势明显不同，而茎和根的分配指数变化趋势比较一致和稳定。
To explore the relationship between dry matter production and product of thermal effectiveness(TEP) and photosynthesis active radiation of greenhouse environment in northeast China,we established and compared dry matter production models of tomato based on the product of thermal effectiveness and photosynthesis active radiation during winter-spring and autumn-winter growing seasons.The results showed that the fitted model simulating TEP and total dry matter obtained good results,the mean absolute error was 5.12 g and 9.67 g per plant,respectively; root mean square error was 9.46 g and 15.02 g per plant,respectively; and the determination coefficient was 0.98 and 0.96,respectively,which inferred that the winter-spring model was better than the autumn-winter model.Using two established models,we compared the effect of TEP on distribution of dry matter among root,stem,leaf and fruit of tomato.The results showed that there were different trends in the partitioning indexes of leaf and fruit between the two growing seasons,however,the trends of stem and root partitioning indexes were more consistent and stable.