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【目的】构建基于生物量的水稻叶片主要几何属性模型,为水稻株型设计与调控提供理论依据。【方法】以两优108、86优8、南粳43及扬稻6号为材料,设置品种、氮肥与密度田间试验,观测水稻主茎不同叶位叶片长度和宽度,分析了水稻主茎叶片长和宽的关系、比叶重(SLW)随叶位的变化规律,以及水稻叶片干重与叶长和叶宽的关系,构建基于生物量的水稻叶片主要几何属性模型。【结果】叶长与叶宽的关系可用幂指数方程表达,比叶重随叶位呈二次曲线变化。采用独立的试验资料检验模型,主茎叶片叶长、叶宽模拟值与实测值的根均方差(RMSE)分别为2.55和0.06cm。【结论】几何属性模型可较好地模拟不同生长条件下水稻主茎不同叶位叶片的主要几何属性,为生长模型与形态结构模型的结合奠定了基础。
【Objective】 The objective of this study was to construct a model of rice leaf biomass based on biomass and to provide a theoretical basis for plant type design and regulation. 【Method】 Two rice varieties, Liangyou 108,86 You 8, Nanjing 43 and Yangdao 6, were used as materials to set up the field experiment of variety, nitrogen fertilizer and density. The length and width of leaves in different positions of rice stem were observed. The relationship between leaf length and width, leaf specific weight (SLW), leaf dry weight, leaf dry weight and leaf length and leaf width was used to construct a model of rice leaf biomass based on biomass. 【Result】 The relationship between leaf length and leaf width can be expressed by exponential equation. The specific leaf weight is quadratic curve with leaf position. Independent test data were used to test the model. Root mean square error (RMSE) of the leaf blade length and leaf width between simulated and measured values were 2.55 and 0.06 cm, respectively. 【CONCLUSION】 The geometric attribute model can better simulate the main geometric attributes of rice leaves with different leaf positions under different growth conditions, which lays the foundation for the combination of growth model and morphological structure model.