中国农业科学2012，Vol.45Issue(21)：4361-4368,8.DOI:10.3864/j.issn.0578-1752.2012.21.004
不同品种和氮素条件下水稻茎鞘夹角动态模拟
Dynamic Simulation on Angle Between Stem and Sheath in Different Rice Cultivars and Nitrogen Rates
摘要
Abstract
[Objective] The objective of this paper is to develop a dynamic simulation model on angle between stem and sheath at different leaf positions on main stem in different rice cultivars and nitrogen application rates. [Method] Based on rice experiments with different cultivars and nitrogen rates, the values of angel between stem and sheath of different leaf positions on main stem during different development stages were continuously observed, a dynamic simulation model for changes of angle between sheath and stem at different leaf positions on main stem was developed by using dynamic modeling technology. [Result] Rice angle between stem and sheath increased with leaf development progress, the duration from the beginning of angle formation to the maximal value was about three leaf ages and the angles increased with the increasing nitrogen rates. From the first leaf to the third leaf, the maximum angle between stem and sheath at each leaf position increased with the increasing leaf position, and then decreased with the increase of leaf position. The logistic equation could be used to describe the change process of the angle between stem and sheath on main stem with growing degree days (GDD) in different varieties and nitrogen rates, and the maximum angle between stem and sheath with leaf position on main stem could be described with linear piecewise function. A variety parameter (the maximum angle between stem and sheath at the third leaf position) was introduced to quantify the variety characteristics on the angle between stem and sheath. Nitrogen factor was also used to reflect the effect of nitrogen on the angle between stem and sheath. [Conclusion] A set of independent pot and pool experiments data were used to test the model, and the root mean square error (RMSE) between observed and simulated values was 2.31° and 2.78°, respectively, and the relative RMSE (RRMSE) was 11.56% and 14.77%, respectively, which indicated that the model has a good performance on predicting the angle between stem and sheath at different leaf positions on main stem. These results would provide technological support for the visualization of rice plant.关键词
水稻/茎鞘夹角/动态模拟Key words
rice/ angle between stem and sheath/ simulation model引用本文复制引用
张永会,汤亮,刘小军,曹卫星,朱艳..不同品种和氮素条件下水稻茎鞘夹角动态模拟[J].中国农业科学,2012,45(21):4361-4368,8.基金项目
国家"863"计划项目(2012AA101306-2)、江苏省高校优势学科建设工程项目(PAPD) （2012AA101306-2）
