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水稻叶鞘和节间生长过程的动态模拟

DOI: 10.7685/j.issn.1000-2030.2008.03.004, PP. 19-25

Keywords: 水稻,叶鞘,节间,模拟模型

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Abstract:

通过对不同水分和氮素水平下不同类型水稻品种叶鞘和节间伸长过程的连续观测和定量分析,构建了水稻主茎和分蘖叶鞘与节间生长的模拟模型。采用Logistic方程描述了主茎和分蘖叶鞘及节间的动态伸长过程;基于同伸叶鞘间的关系用二次曲线描述了分蘖叶鞘长度的变化;基于节间长度与直径的线性关系描述了节间直径的变化。另外,用叶片含水量和含氮量描述了不同水分和氮素水平对叶鞘和节间生长的影响。利用独立的水稻田间试验资料对所建模型进行了测试和检验,结果显示,主茎和分蘖叶鞘(一级分蘖和二级分蘖)长度模拟值的根均方差(RMSE)分别为0.65、0.52和0.46cm;节间长度和直径模拟值的RMSE分别为0.42、0.15cm。本模型具有较好的预测性,能定量描述不同品种和环境条件下水稻叶鞘和节间的动态伸长过程。

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